text:
Ontology Dowsing
"Dowsing is a type of divination employed in attempts to locate ground water, buried metals or ores, gemstones, oil, gravesites, and many other objects and materials, as well as so-called currents of earth radiation, without the use of scientific apparatus."
--Wikipedia article on Dowsing, retrieved on 14th January 2010.
At the moment, the methods used in practice to locate an adequate vocabulary for describing one's data in RDF are more akin to dowsing than to an educated, technically-guided choice, supported by scientific tools and methodologies. While the situation is improving with the progress of Semantic Web search engines and better education, oftentimes data publishers still rely on informal criteria such as word-of-mouth, reputation or follow-your-nose strategies.
This page tries to identify methods, tools, applications, websites or communities that can help Linked Data publishers to discover or build the right vocabulary they need. The tools identified below are sorted from the ones that require less time and efforts from the publisher's side to those that require hard work.
Lists of ontologies and services
Main article: Lists of ontologies
There are several webpages that reference ontologies by simply matching a theme (e.g., People, Product) to a URI or listing tools to find ontologies. Examples:
- Semanticweb.org gives a short list on its homepage, and a longer list in its articles;
- VocabularyMarket provides links to ontologies, answering simple questions (how about music collections?) and some other links to services, similar to this page but with many outdated links and a disorganised structure;
- Ontology on Semanticweb.org has a list of ontologies, ranked according to their usage;
- RDF Schema Registry has a big list of ontologies on various topics;
- Ontologies that are fully documented, used by independent datasets and supported by tools, on SemanticOverflow;
- Semantic Web Searching provides links to many search services, both semantic and non-semantic, with some outdated links;
- Answer to "Ontology to use for querying" provides a list of all the question/answers about ontology discovery that have been asked on SemanticOverflow;
- The Library Linked Data XG has written a report on available metadata element sets in the library domain.
This category requires minimal effort: if the publisher's data are in the domains referenced in the list, the corresponding ontology can readily used.
These lists pose the question "how to define what's in these lists?" Popularity is one aspects, quality may be another. What is a quality ontology? When does it become popular? Who decides?
Search engines
Main article: Search engines
Semantic Web search engines are applications for finding ontologies that require reasonable effort: queries are usually written as natural language keywords and results are ranked. Some additional information is often provided. Examples:
- FalconS has both term search and ontology search features;
- Sindice generic Semantic Web document search;
- Swoogle is the grand-father of Semantic Web search engines;
- SWSE is an RDF entity search engine;
- vocab.cc RDF term search;
- Watson is an ontology search engine.
The problem here is that it is still hard to choose between two matching ontologies. What should guide publishers to the right choice? Should these ontologies be reused at all? See also BuildOrBuyTerms.
Main article: Ontology repositories
Ontology repositories are usually more specific that semantic web search engines and their navigation/search interfaces can vary greatly. They offer tools that may be specific to the type of applications the repository was designed for. Examples;
- SchemaWeb is a quite old ontology directory, but it is still used;
- Schemapedia is another ontology directory;
- Cupboard is an ontology repository with some advanced features, powered by Watson Semantic search engine;
- Knoodl is a repository and collaborative ontology management tool;
- Ontology Design Patterns repository for design patterns and ontology modules following the patterns
- Prefix.cc is a namespace lookup service, which can be seen as a kind of vocabulary directory;
- DERI Vocabularies is a repository and can be used as an online ontology editor;
- OWL Seek is a repository of ontologies with additional metadata such as funding organisation, submitter, submission dates and possibly to get a list sorted by various criteria.
- SchemaCache is a tool by Talis.
- Linked Open Vocabulary offers a visual navigation among dereferenceable vocabularies (made by Mondeca).
Mailing lists/online communities
Main articles: Ontology-related mailing lists and Ontology-related online communities
If other tools are not sufficient to find an appropriate vocabulary, publishers can (and often do) rely on online communities by asking them directly. Examples:
- Ontology Dowsing Google Group;
- W3C Semantic Web mailing list;
- Linking Open Data ML;
- RDF Interest Group
- Semantic Web Yahoo! Group;
- SemanticOverflow is a Q&A service about semantic technologies;
This is a rather effortless solution which can be really efficient in some case. However, repeated enquiries about vocabularies can easily polute the traffic and publishers should first try to find a solution on their own, e.g., by following the links and indications and this wiki page. See also MailingLists.
Ontology Editors
Main article: Ontology editors
If a data publishers cannot find a relevant vocabulary, or existing vocabularies are not good enough/suitable for the use case, they can make their own ontology. They can be helped by editors, such as:
- Protégé ontology editor (popular, pluggable).
- WebProtégé is the online version of Protégé.
- NeOn Toolkit is another ontology editor with many pluggins available. It is especially suited for heavy-weight projects (e.g., multi-modular ontologies, multi-lingual, ontology integration, etc);
- SWOOP is a small and simple ontology editor;
- Neologism is an online vocabulary editor and publishing platform;
- TopBraid Composer is a multipurpose Semantic Web editor;
- Vitro is an Integrated Ontology Editor and Semantic Web Application;
- Knoodl is a community-oriented ontology and knowledge base editor.
- Ontofly is a web-based ontology editor.
- Altova OWL editor is another ontology editor.
- PoolParty is a thesaurus management system and a SKOS editor.
- IBM Integrated Ontology Development Toolkit An ontology toolkit for storage, manipulation, query, and inference of ontologies and corresponding instances, based on Eclipse.
- Anzo for Excel will generate an initial ontology based on spreadsheet data and structure.
- Euler GUI is an editor for N3, RDF, OWL and other various other things.
This requires considerable efforts and requires some guidelines.
Learning ontology design, best practices and evaluation
Main articles: Best practices and Ontology evaluation
Guides to ontology design:
- Protégé guide
- An Executive Intro to Ontologies in AI³ blog;
- Creating an RDF vocabulary: Lessons learned is a blog post by Richard Cyganiak which provides advises for building a Web vocabulary.
Here are best practices:
- DontWorryBeCrappy: it's ok to do it wrong, it can improve later;
- Best Practice Recipes for Publishing RDF Vocabularies.
In addition to finding or making an ontology that contains the terms that are needed for the dataset, publishers may like to assess the quality of the ontologies, especially when they have the choice between several of them. Some possible factors:
- Fully documented;
- Used by independent data pubslihers;
- There exist tools that support the vocabulary specifically;
- The ontology is highly ranked by users in a voting system;
- all terms are dereferencable;
- The ontology just covers the right domain (not an upper level "ontology of everything");
- expressive enough: the ontology has axioms that make valuable inferences;
- not too expressive: the ontology does not define axioms that have limited utility and would make reasoning costly;
- OWL 2 Validator determines whether an ontology is in OWL 2 DL, OWL 2 EL, OWL 2 QL, OWL 2 RL or OWL 2 Full;
- OWL 1 Validator determines whether an ontology is in OWL 1 DL, OWL 1 Lite or OWL 1 Full;
- RDF Validator the official W3C validator for RDF/XML syntax validation;
- rdf:alerts is a tool for finding potential problems in linked data;
- ...
Interlinking ontologies
Main articles: Interlinking vocabularies
Interlinking ontologies can mean reusing existing ontologies, in modular way, or aligning ontologies. There are quite a lot of tools for ontology matching, most of which are prototypes from research projects. The following are well maintained tools:
- The Alignment API is used and supported by many ontology matching tools;
Some useful information are available on http://ontologymatching.org/, including references to existing tools, a very comprehensive list of scientific publications on the topic (500+ references).
Related Events, Projects, etc.
Main articles: Ontology-related events and Ontology-related projects
There is an important amount of research work going on to solve parts of the problem of guiding publishers to the right vocabulary:
- EKAW 2010 Workshop on Ontology Quality;
- ISWC 2010 Workshop on Semantic Repositories for Web, SERES 2010;
- SEALS is a European project on evaluating semantic applications, including ontologies;
- Semantic Web Journal is an academic journal which encourages the publication of ontology description (=> peer reviewed ontologies => good ontologies, in principle).


text:
Our work to build healthy communities, families and individuals is at the heart of Mercy Corps' vision for social change. By partnering with a range of partners, from village health committees to government agencies, we help build the means to improve maternal, newborn and child health, ensure proper nutrition and combat infectious diseases.
All stories about Health
Tajikistan: Village pediatrician takes the lead in battling childhood illness
Dr. Hasan Hojiev gestures passionately as he speaks about childhood illness and nutrition. He exudes the bubbly enthusiasm of a fresh medical graduate, but has been a rural pediatrician in northern Tajikistan for over ten years now. Dr.
Indonesia: Tsunami survivors are ready to live healthy
Tajikistan: Spiritual leader doubles as public health educator
"It's a sin to live a passive life. If you see a blind man walking towards a well, it's your duty to say something," Mullah Salohideen said with conviction — looking up from studying a brochure on childhood illness in the village clinic's only empty room.
Tajikistan: Train a teacher, teach a community
Faiziniso Ruziboeva has always dreamed of becoming a doctor. However, there is only one medical school in all of Tajikistan, which located in the nation's capital, Dushanbe.
Ethiopia: Helping Ethiopian mothers protect their children
It is astonishing to know that very simple solutions exist that will protect our youngest citizens against diseases, yet so few children have access to this basic health care in countries where it is most needed.
DR Congo: Boy in Buhimba IDP camp, Congo
A boy living in the Buhimba camp for families displaced by war, outside the city of Goma, DR Congo.
Indonesia: The importance of washing your hands with soap
The emergency response team here in the tsunami-stricken Mentawai Islands has been preparing for a hygiene promotion campaign for survivors, and today was their first day in action!
Haiti: The power of play
Herma Pierre, 13, is beating the odds. She survived the earthquake. And she's growing up in Port-au-Prince's toughest slum. Six years ago, Cité Soleil was a war zone. Violence has subsided in recent years, but for girls like Herma, guns and gangs still pose a serious threat.
Haiti: Responding to cholera
Haiti: The long road to recovery
The Jan. 12, 2010, earthquake in Haiti decimated the capital city of Port-au-Prince, killing more than 230,000 people. It was a tragic blow to a country where 55 percent of the population already lived below the poverty line of $1 a day.

subset: commoncrawl


text:
The article begins:
"The Subversive Copy Editor." What a title! It brings to mind all sorts of wickedness, does it not? The rogue editor inserting illicit language, or botching grammar, or wittingly misplacing punctuation out of spite toward some demon writer.But it's not what you think — nor is this a stylebook or a grammar guide or a primer on the hobgoblins of English usage (we have plenty of those). No, this is a "relationship" book, writes its author, Carol Fisher Saller, doyenne of The Chicago Manual of Style Online's Q.&A. Here, she hopes to "soothe and encourage and lend power" to editors who have too long suffered "from the oppression of unhelpful habits and attitudes." This is the book Oprah would write if her vocation were saving writers from embarrassment, rather than saving the whole world.
And goes on to say:
She [Saller] reminds us that the reader is Priority 1 and that while standards are crucial ("I'm not going to suggest that you toss out your stylebook"), so is flexibility (sometimes "a style is just a style"). There's advice here on deadline management, e-mail etiquette and how to handle "the difficult author." There's even a section called "Dear Writers: A Chapter of Your Own," which aims to make the editing process — and editors themselves — seem just a tad less
Looks like a winner!
Click HERE to read the book's introduction from the University of Chicago Press Website and HERE to order the book.


text:
Sorry, does it communicate distance infos to Canon and Nikon bodies, to obtain more precise exposure with dedicated flashes?
Tamron gives SP 24-70mm F2.8 Di VC USD price and availability
Tamron USA has announced pricing and availability of its SP 24-70mm F/2.8 Di VC USD image-stabilized fast zoom lens. Canon and Nikon mount versions of the lens will be available from April 26th 2012, at a MSRP of $1299. The Sony version, without image stabilization, will follow at a later, unspecified date. The lens is compatible with both full-frame and APS-C cameras, includes a moisture-resistant body, and a rounded aperture for attractive background blur.
Press release:
New Super Performance full-frame zoom lens features class-leading resolution and Tamron's proprietary VC (Vibration Compensation)
April 5, 2012, Commack, NY -Tamron USA, Inc. announced the SP 24-70mm F/2.8 Di VC USD (Model A007), the world's first1 full-size high-speed standard zoom lens equipped with VC (Vibration Compensation) image stabilization and USD (Ultrasonic Silent Drive)[2], with resolution at the top of its class, will be available starting April 26, 2012 in Canon mount with Nikon mount following. Delivery of the Sony mount version has not been released.
Product Features
- World's first full-size, high-speed standard zoom with built-in VC (Vibration Compensation)[3]. Even when shooting in low-light conditions with a slow shutter speed to render sharpness, Tamron's acclaimed VC allows for stable handheld camera work, to more fully enjoy the benefits of this high-speed zoom lens.
- Uses specialized high-grade glass in the three LD elements, three Glass Molded Aspherical Lenses, one Hybrid Aspherical Lens and two XR (Extra Refractive Index) glasses, delivering top-of-the-class quality images suited to this high-grade lens. Using a rounded diaphragm[4], the lens achieves gorgeous blur effects.
- Features USD (Ultrasonic Silent Drive) to power a speedy AF drive together with a continuous manual mechanism.
- This high-speed standard zoom lens has a wide-end focal length of 24mm that expands the photographic area.
- The lens adopts the new technology including the latest optical design, VC (Vibration Compensation) image stabilization and USD (Ultrasonic Silent Drive), all in a lighter and more compact package.
- Moisture-resistant construction helps prevent water from penetrating the lens.
1. For high-speed standard zoom lens compatible with full frame size SLR cameras. Current as of April 5, 2012. (Source: Tamron).
2. USD (Ultrasonic Silent Drive) is Tamron's proprietary ultrasonic motor drive.
3. The Sony mount does not include VC, because the body of Sony digital SLR cameras includes image stabilization functionality. The product name for Sony cameras is "SP 24-70mm F/2.8 Di USD" without the VC designation.
4. This rounded diaphragm retains a nearly circular shape even when taken two stops down from its fully open state.
|Focal length
|Maximum aperture
|Angle of view (diagonal)
|84°04' -34°21' (for full frame 35mm format cameras)
60°20' -22°33' (for APS-C format cameras)
|Lens construction
|17 elements in 12 groups
|Minimum focus distance
|0.38m (15.0 in)
|Maximum magnification ratio
|Filter size
|No. of diaphragm blades
|9 (rounded diaphragm)
|Minimum aperture
|Standard accessories
|Flower-shaped lens hood
|Compatible mounts
|Canon, Nikon, Sony**
* Length and weight values given are for the Nikon mount
** The Sony mount does not include VC, because the body of Sony digital SLR cameras includes image stabilization functionality. The product name for Sony cameras is "SP 24-70mm F/2.8 Di USD" without the VC designation
I just got the 24-70mm and here are my first impressions:
-The VC work very well for video, everything is smoother
-VC on photo about 2.5-3 stops
-Autofocus is pretty quiet and fast enough
-Nice Bokeh but not like a great Canon lens
-Solid construction
-6 years warranty
-Image quality is very good and sharp
Worth the price!!!
y no K-mount version :(
I bet my 50mm 1.8Mk2 is sharper, faster, lighter and 1/10th the price.zoom with my God given legs.
I'd really love to try this. i cancelled my canon 24-70L lens after reading too many reports of softness. However, tamron really screwed me on a 18-270 which had stuck focus. I contacted their customer support twice and both times received an auto-responder with a promise of a followup which never happened. Not sure I'd trust them for support on a $1300 lens. Buyer beware...
Buy it with a good credit card, return it to the place of purchase. Done. The protections you get with (good) CC transactions often are far better than any support you'll get from the mfr. If it's older than a couple of years, you might have to actually use a phone - 800-827-8880.
problem is, the issue didn't develop until well past the CC return policy period. It was 3 months old so they should have supported it.
Jack, by "auto-responder" I assume you mean e-mail.
Based on my experience with Tamron U.S. service I'd recommend calling directly. In my case, the lens I sent to them had extreme CA. In the cover letter I referenced the name of the person with whom I spoke and I included sample files. They agreed and sent me a new lens within a week.
Man, I wish Tamron would re-do their 35-105/2.8. I have one, but now that I'm shooting digital, I'm seeing the softness of the lens at the wider apertures. Still, it's my carry-all lens. 35 is wide enough for most walking around photography, and 105 is long enough for people-events. My first lens was a 28-85 Nikkor, and it wasn't wide enough for the artsy shots, nor long enough to pick people out of a crowd in a bigger room. I fear that the 70mm top end on this would be similarly limiting.
I'm certainly not worried about the Tamron quality on their higher end gear. The 35-105 has been in my bag for almost 20 years now.
At least this 24-70mm f/2.8 lens telescopes out for longer focal lengths and the hood does not move with the internal barrel. This is unlike my Sigma 24-70mm f/2.8 lens which telescopes out for the shortest focal lengths (24mm) and is most compact at the 70mm setting. Also the hood moves along with the telescoping making the lens even longer at 24mm.
Also my copy of the Sigma 24-70mm f/2.8 EX Macro (old version, not HSM version) seems a lot sharper on APS-C, even the central region. Can't explain this. I was not impressed with medium to longer focus distance quality pics from the lens on full frame (SONY).
So I would consider upgrading to this Tamron but the lack of in-lens IS/VC for Sony mount while selling for close to the same price as a used Sony Zeiss 24-70mm f/2.8 puts me off.
Err, it looks like the hood moves with the telescoping front assembly so it will add to the over all length as you zoom to 70mm.
Are there any lenses for the Sony mount that have IS/VC?
If memory serves no. There are no IS or VC for Sony as it is done internally in the camera body and not the lens.
Usually not since Sony dSLRs have in body IS, making it redundant to have it on the lenses
If one would like to match this lens with a budget dslr body which can perform, which body is good.
For Nikon, that would probably be the D5100. For Canon, maybe the 600D.
5D Classic is a great performer and can be had for 650-800 depending on condition.. No sense in using it on a Crop camera, there are plenty of options available for croppers already...
Does anyone know if this lens features internal zoom? I really don't like extending lenses...
Well, considering that the Canon 24-70/2.8L I and II are extending zooms, it's pretty likely that this is an extending zoom too.
it is extending externally.
you can see it at 0:34s
The nice thing about it, though, is that it extends inside the lens hood, just like the Canon 24-70/2.8L. In other words, when you have the hood mounted, the hood remains stationary on the body of the lens, but the front element telescopes in and out, inside this stationary hood.
You can see this very quickly at 0:57s
Nope, it does not look like that video is with the 24-70 2.8 Tamron, look at this video and you will see that where the hood attaches is on the extending portion so it is similar to the canon 24-105 and the new canon 24-70 II, which both have extending hoods which means the hoods are optimized for the widest setting.
Another thing to consider is if it did have a hood similar to the canon 24-70 zoom, they would mostly likely make mention of it, which they have not, and the video
( http://www.youtube.com/watch?v=TILNwURGIv0 ) if you look closely when the extend the zoom out and he rotates the lens to show what focal length setting it is set, it is the 70mm setting, which makes it highly improbable that it can be such a design similar to the canon 24-70 zoom because for it to work would have to extend as the focal length gets wider, in other words a reverse zoom.
I was naively hoping for a kit lense replacement for something like 500-700 euros :(
Sorry but that's. Incredibly. Unrealistic. For a full frame sensor lens of that category. With the inclusion of image stabilization this id already a competitive price compared to canon or nikons versions
yes, it say 1299$ MSRP which is close to Canon or nikon high end zooms, but I think price will drop fast, may be over 1 month and will be around 900$ street price or that lens must be perfect in quality as canon or nikons
Wonder why they think Sony users wouldnt like to have VC as option.. Sure in 24-70 difference between stabilised sensor vs lens isnt big, still for movies its nice option..
sony has in camera body stabilised sensors so it not really needed. this should bring the price down.
I never have seen much lower price for Sigma/Tamron (Sony) lenses wo IS. I would buy stabilized lens for Sony.
yes, price is sometimes even higher without OS/IS/VC so i dont get it why it should be without for sony.
And until now i wasnt able to get SteadyShot working in the View finder, it only affects if you take the photo or the movie so it would help a lot with manual focusing.
Also the objective IS is specialised for the focal length. Sony tells you can have 4,5 more aperture with steady shot, sigma with the 18-250 tells maximum 3
my sigma 18-250 have the better IS then the in-body steady shot (it least in my Sony A77)
The lens IS probably works fine on Sony bodies but the body IS needs to be turned off. Since there's no good mechanism to switch these, perhaps they decided the simplest route is to just not offer in lens VC. I think there's a way for the lens to tell the body not to use SSS. Not sure if Sony or Minolta had publicized it.
Vamp898, so you have a sigma 18-250mm has IS, even for sony mount? and it's confirmed to work better than the in-body SSS?
I wonder why Tamron never wants to put IS for its sony-mount lenses. even worse, the price stays the same as the Tamron canikon-mount with IS.
I am annoyed they dont offer VC. OS is usually better, plus for us Nex owners, we could really use it. Now I am limited to Sigma for a 2.8 standard zoom w/stabilization it seems..
In Japan, its brochure is already available in a shop. They say pictures in it are so good and expect it'd be greatest Tamron's lens ever :)
It's lenses like this that make me think of jumping ship to Canon or Nikon FF.
That's what I thought too. Look at the tech spec, Tamron loaded it with special glasses. This is the most important lens range and Tamron could not afford to make a lame lens.
can't wait to see a comp..
Reading the future reviews one should be careful.
No doubt, new Canon 24-70 f/2.8 will be the spoiled baby and the Tamron one "the ugly duck"...
That IS feature sounds very good... I think that if that lens has a decent performance, this Tamron joined to the 5DIII would be an amazing team in low light scenes.
If Canon thought their gear was that much better, they'd add a better warranty on their $10,000 lenses than only ONE year. The have to have the worst lens warranty going for a major player right now.
Nikon USA has FIVE years and Tamron USA has SIX years, if you avoid the gray market ones. Of course, either could claim "Impact damage" and stick you with a $500 bill too to circumvent it.
I'd rather buy the non IS canon for the same price because it makes me feel better inside for no logical reason. After all, Canon deserves a break right? Especially with all the money they 'invest' in marketing the message that their stuff has to be better. Its first party. First party is always better.
Try reselling that Tamron and you'll see that maybe the Canon/Nikon lens was worth a bit more after all. Snobbery perhaps but for good money I would expect this Tamron to be at a new level of quality they have not reached previously, and properly centered so the one you get is the same as the one tested.
If resale value is a factor then you're either looking in the wrong price range for your budget or you need to find a system you can trust more.
However, I would totally understand the statement:
"I buy first party because I _______ and I might need to sell off all my gear if it goes south."
However, no one ever says that. Its mostly first party snobbery.
@AbrasiveReducer- initial assessments look pretty good:
As for resale value, I don't know why that's such an essential factor for people from the getgo. I pick lenses that I can keep because I buy them so I can use them, not so I can sell them. And their value is in the photos I can create with them, not in how much I can resell them for. Ideally, you want to pick and choose lenses that you don't want to resell.
Ironically, if I were to buy the Canon or Nikon 24-70/2.8 lenses, I would be *more* likely to want to resell them down the line because I would eventually want a lens that had IS/VR. So you take a hit in price twice when you buy these lenses: the first time is when you're paying $1000 more than the Tamron, and the second time is when you're reselling them for a lot less then what you bought them for. So in reality, you would have probably been better off, financially, to have bought the Tamron to begin with.
I sell used lenses frequently on eBay, and my observation has been that a good lens will keep its value, regardless of the brand. The value will mostly be determined by how much a new copy costs.
I own the Tamron SP AF 17-50mm f/2.8 XR Di II LD IF non-VC lens in a Nikon mount and bought the Tamron 17-50mm f/2.8 VC version to replace it. However, after comparing the sharpness of these two lenses, I decided the non-VC lens was noticeably sharper at f2.8-f4.0. I could not justify the loss in sharpness for the occasional usefulness of VC in a lens of such short focal length, so I returned the VC version and kept the sharper non-VC version. There is little doubt in my mind that this new 24-70 VC Tamron would have been sharper without the VC. I'll bet the reviews of this lens will find the center sharp and the edges soft at f2.8-f4.0. The only good reason to have VC on a lens of this type is for shooting video where it matters, and softness does not.
I don't think you understand lens design. If VC is added as an afterthought, then yes, there is the potential for diminished optical performance. However, when VC is an integral component of the optical formula, it should not diminish the optical performance at all.
Consider, after all, the numerous Canon and Nikon IS/VR lenses that deliver superb optical performance, equal to or better than their non-IS predecessors. Consider the latest Canon 70-200/2.8L IS, which is definitely superior in optical quality than the non-IS 70-200/2.8L! It is simply naive and ill-informed to assume that the addition of IS/VR/VC automatically means diminished optical performance. If that were true, there would be significant and obvious evidence of it throughout Canon and Nikon's lens line-up. I can assure you that when someone buys a Canon or Nikon 600mm f/4 IS or VR lens, these buyers aren't saying, "I guess I'm just going to have to sacrifice sharpness for IS/VR!"
video? What about general travel lens where there are both dark and light situations. It will be much easier for twilight / cityscape at night shots handheld.
I found th same thing with the 17-50. Yhe non VC is what I still have. I hope T3 is right. It makes sense.
It seems that Zeiss has similar standpoint of view. As such, they do not put anti-shake mechanism into their high-end products. While Zeiss is for sure producing superb optics, I don't think Nikon and Canon are manufacturing sub-par VR/IS lenses but charging people at top-of-the-line price level.
For nowadays technology advancement, the inclusion of anti-shake mechanism should not be a hindrance to manufacturers in the production of superb optics.
The 17-50 VC is a single, isolated example. The 70-300 VC lens is sharper than their old non VC 70-300's. The SIgma 17-50 OS is sharper than the old 18-50 f2.8. Canon's IS lenses have all be sharper than their predecessors. Nikon's 16-35 VR is very sharp.
The non VC version of Tamrons 17-50 has been widely reported to have better optical performance than the new VC version. As with any lens purchase, its wise NOT to assume the new version will be better in all respects. The focus breathing of Nikons 70-200 2.8 VRii is another classic example... its a great lens in every other way but for users who want close focus @200mm the VRi may be a better choice.
I hope the 24-70 VC does not have any major issues... and will wait for reviews before purchase.
jonikon was speaking from experience in the fact that he actually HAD both and compared them to find that the new lens wasn't as good.
You're just spouting theory.
With my lenses it was the exact opposite. The VC version is way better than the non-VC version I had first.
I put together a little test you can find halfway this page:
@CommanderMAD- you can not take the experience of *one* lens model and extrapolate that to all lenses that have IS technology. Plus, it's a *fact* that there are a lot of IS lenses that optically better than their non-IS predecessors! Additionally, it's a *fact* that there are plenty of IS lenses that deliver *superb, top-level* optical performance that is unhindered by the integration of IS technology.
It's bizarre that we're still even discussing this, because IS technology is very widely used in lenses of all levels, and has been used by the most demanding photographers for years now! CommanderMAD, you act as if IS is some unknown, untested, untrustworthy technology that still needs to be vetted. Wrong. We're way past that now. You're living in the 1990's!
Yes it is a universally known fact of course, that Tamron's 17-50 F/2.8 non-VC lens is sharper than its VC newer version. I've owned and used all of the versions of the Tamron 17-50 in both Nikon and Canon mount. By the way there are 3 versions in Nikon mount but that is besides the point.
Interestingly, the newer Tamron 18-270VC Piezo, which replaced the older Tamron 18-270VC, the users report that it is also softer than the old version (in the tele region of zoom). I personally owned the old version of that 18-270, and not the new version, so I cannot tell from experience, but the reviews I have seen seem to support that point.
The only other lens that Tamron made with VC was 70-300VC. I owned that lens and used it on Nikon D700 and D7000. I found the sharpness ok, but replaced it with Nikon's 70-300VR. What I did not like on Tamron 70-300, was, that despite the Ring Focusing that Tamron finally started to put inside lenses), the focusing was just slow.
So it appears, at least until now, that when Tamron puts VC in something, they screw up the optics. However, their VC is the best in industry, you can hand-hold pretty much anything. But I give them a benefit of the doubt; hopefully they finally figured it out and can stick the VC mechanism and not screw up the sharpness on the lens, in the new 24-70VC. I am also hopeful that they finally figured out how to do fast AF like Canon's USM (or even Sigmas HSM)
Yes. yes VC is not so important in still imaging but for video, canon 24-70 is good on tripod only. Tamron will have huge success among video/still graphers. canon prime 28 IS for videographing and street photography taken in mind. Hope the critics will be substituted here with more broad understanding of lens applications.
An 82mm filter is going to mean this thing is huge! Don't know if I'm willing to buy another round of B+W filters for an 82mm lens when most of the Nikkor f/2.8 lenses are 77mm filter sizes. Have to wait for the IQ tests to show too.
However, another nice thing going for it is that Tamron USA has a 6 year warranty on their lenses over the 5 year Nikon USA versions. Good luck with the gray market on either as neither will get fixed by the US importer now under warranty. Sadly, Canon lenses are only one year still which is screwy on some $10,000 lens of theirs. Not much faith in them it appears. I would expect more out of Canon by now.
"Don't know if I'm willing to buy another round of B+W filters for an 82mm lens when most of the Nikkor f/2.8 lenses are 77mm filter sizes."
In the digital age, how many physical, screw-on filters do you still use? Back in the film days, I had a ton of color correction and effects filters. Since switching to digital, I've gotten rid of all of them except for a polarizing filter. Who the heck needs a bunch of screw-on filters when you can apply most filters with much better control and flexibility via post-processing?
Still need ND filters, UV filter, and Polarizing filter. A hundred bucks or two if you need to buy everything.
I bought extra large filters and then use step-down rings for smaller lenses, rather than buying separate sets of filters for each size lens.
$1299 seems expensive. Even with image stabilization, I'd rather buy a Canon 24-70 for basically the same price.
I think a lot of people underestimate the value of IS.
For example, IS allows you to shoot stopped down and still get a steady shot. And stopping down a lens increases its optical performance. Lenses rarely perform as well when shooting wide open as they do when the aperture is stopped down a stop or two. With a lens that has IS, you have greater flexibility to take advantage of stopping down the lens than you do with a non-IS lens.
So lets say that the Tamron and Canon lenses perform quite similarly at f/2.8. But how will the Canon compare to the Tamron when both are stopped down to f/4 or f/5.6, with only the Tamron having the advantage of IS to keep it sharp and steady? Or how does the Canon at f/2.8 compare to the Tamron stopped down to f/4 or f/5.6 because the Tamron can take advantage of IS to keep it sharp and steady, while using the stop-down technique to get better optical performance?
Do not forget the thumb role of velocity equal the double of the focal lenght, and ISO resources etc to compensate for. If one buys a 2.8 lens is to use that aperture most of time. Besides, a new electronic circuit in a lens circuitry could add an additional source of defect in it. Rarely one buy a lens like that to make very sharp photos. But, if this lens proves to have an optical as good as Canon new 24-70 than the VC may become a minor advantage not to say the price.
"If one buys an f/2.8 lens is to use that aperture most of the time." -- True. But "most of the time" still leaves other occasions where f/2.8 isn't being used. Just because a particular feature isn't being used "most of the time" does not mean it's still not valuable. For example, plenty of us would really like clean ISO 12,800...even though we would not be using it "most of the time". We want it there when we need it. Same with IS.
"Besides, a new electronic circuit in a lens circuitry could add an additional source of defect in it." -- LOL. People have been using that argument ever since the first electronic camera! People made that argument against auto exposure circuitry, against auto focus, against Image Stabilization, against LCD screens, and even against digital photography. Besides, I think IS technology has proven itself to be very reliable over the years. It's a very widely used technology these days. No need to fear it. Time to join the 21st century.
So, I ask you, why Canon, mastering this technology long time before Tamron (who is Tamron compared to Canon?) and other brands, Nikon inclusive, do not put it in this lens recently relaunched and put it in several cheaper non Pro lens? What matter in this focal length with such an aperture is not stabilization. A lens in this price range is made to experienced Pro photographer not to parkinsonian amateur. Even DP was surprised by Canon recent non Pro 2.8 lens launch with IS. Canon EF 24mm f2.8 IS USM. DP questioned if a such aperture lens needed stabilization. I think Canon was clear in its target: Non Pro amateur photographer. But, if this were not a burden it is welcome since we can switch it off and on. But remember, the IS circuit is coupled to AF circuit so a malfuncion in it can compromise the AF.
IS adds weight and cost to the lens; Canon probably did not add it due to those factors.
Tamron on the other hand needed something to one-up Canon (otherwise why buy Tamron)? Therefore they included IS.
Ruy, your concerns regarding "the IS circuit is coupled to AF circuit so a malfuncion in it can compromise the AF" is completely pointless because Canon is perfectly fine with putting IS in plenty of their lenses, including plenty of their top L lenses. IS exists in lenses from the Canon 24-105/4L to their upcoming 200-400/4L IS, and many, many others. When these lenses were announced, did you jump into discussions, raising concerns about "the IS circuit is coupled to AF circuit so a malfuncion in it can compromise the AF", or that these lenses were for "Parkinsonian amateurs", or that IS was "a burden"? LOL. Relax, IS is very reliable, effective, and for users of all levels. We pro shooters enjoy the advantages and effectiveness of IS just as much as amateur photographers. In fact, IS is probably even more important to us because it can make the difference between a sellable image, versus a missed opportunity.
I know plenty of pros who would love IS in the Canon 24-70/2.8L!!!
Ruy, you also forget that we live in a new age now, where more and more of these DSLRs are being bought and used to shoot video. And having a lens that can do IS can be a very valuable tool for many DSLR video shooters. Many suspect that this is why Canon chose to put IS into their new 24mm and 28mm primes. It's possible that the latest 24-70/2.8L was put into development long before they realized that it should really have IS because it would be desirable to the many video shooters that were now buying DSLRs. You have to remember that product development occurs far, far ahead of the product announcement, sometimes years in advance. I would not be surprised if Canon is working on an IS version of the 24-70/2.8L right now as we speak, for release in the future!
If you don't need stabilization in wide lenses, why would nikon add it to a 16-35? If you don't need it for standard zooms, why did Canon add it to the 17-55?
And those saying they would just buy the Canon for the same price had better hurry up. I really doubt canon is going to keep making that once the $2200 v2 lens hits the shelves. So you can buy used and hope it's a good copy, buy the Tamron, or pony up for the $1000 more expensive new Canon.
Well, I had a AF-S Nikkor 24-70mm f/2.8 and i sell it because I can't use this lens (24mm on FF) below 1/60s. With my Nikkor 24mm f/2.8D I can use shutter speed up to 1/15s without blur.
Maybe if it had VR I could use up to 1/15s, 1/20s without blur. So, I guess the Tamron hole in one with this lens.
Well, the compelling reason to buy Tamron is because it's cheaper. It's not likely to be sharper than one of Canon's better lenses. Stabilization is nice to have especially if the lens turns out to be pretty good.
I have been checking daily for price and availability on this lens. I love VR in the mid-range because I can shoot lower ISOs handheld and still get nice sharp photos. A D800e is in my distant future, and right now all I have are primes for mid-range on my D700, no VR (not a big problem for the D700). I want this lens, if it checks out good. I believe the street price will drop after release, sooner rather than later. If it just has good center sharpness at f2.8 I'm all in for it. Imagine the indoor, casual family portraits you could get with this and a D800e.
"Imagine the indoor, casual family portraits you could get with this and a D800e."
I can imagine lots of moire on clothing and soft corners
Pessimist. And I'm not anal about that stuff. The bright faces are the point of interest. Just take plenty of photos, and use software if necessary.
Moore and soft corners is overblown. If you are doing commercial work, then it may be an issue ... but then you probably wouldn't look at this or comment in the first place. Get your gray point, shoot your portraits, run your raw files through and get paid for your work. When you're shooting wide open, who cars about soft corners.
Non-commercial customers don't complain about corners and more, photographers do.
somebody use Leica S2 for casual pet shots, I could't care less
just pointing out the fact, D800e is not the best tool for casual shots
get it?
Y'all are cracking me up. Of course I use a $5000 rig for family photos. Why not? It's my hobby and my money. Who commutes in a $50,000 BMW or a $60,000 truck? Not me. Who fishes in a $50,000 boat on the weekend? Not me. I take pictures of birds, sunsets, and family with a $3000 camera. If you have a problem with that, take it up with your therapist (and I don't use those either).
Where's PENTAX mount? I believe many PENTAXIAN would buy this lens
to use with Film Pentax SLR?
Exactly ! This is a lens best suited for film or 35mm sensors rather than a crop sensor camera. I use a 24-70mm on a crop sensor and the 36mm equivalent FOV is killing for indoor shots.
As Pentax DSLRs have built in stabilization the advantages of this new lens over the 28-75 2.8 are minimal. I used to shoot Pentax, and really miss having antishake in my short lenses now that I went FF Nikon.
This lens makes much more sense for Nikon & Canon shooters who want VR / IS.
Tamron don't make lenses for Pentax mount any more, they stopped after the 10-24 was released about two years ago...
If this lens doesn't have front or back focus issues it's the clear choice unless you need higher build quality. Want this so bad, being able to shoot events in comfort knowing you'll only have to worry about motion blur on subjects, would be awesome.
I mean Canon is charging almost the same just for a 24mm prime with IS.
It's awesome to see Tamron back in the Hi-end "SP" class with an option to Sigma's 24-70/2.8 EX HSM aor the excellent but expensive Sony/Zeiss 24-70/2.8 ( in the Sony field ). I hope the Sony A-mount version comes with a somewhat lower price, since it doesn't have/need the VC ( I doubt it, though... ).
Well that starts the ball rolling...
The gauntlet has been thrown down.
Special Performance lenses like these grab the thunder away from the stable of the top brands, as well as grabbing away not only market share of the 24-70mm f2.8 lens class, but wall sitters who may have been sitting on the fences too long will now swoop the coop.
Unless of course a really major design and function blunder occurs on this particular lens, which the manufacturer would do utmost to avoid.
A welcome addition to the fold. IQ and performance remains to be seen.
I believe Nikon will add VR to their new 24-70, which has to be coming soon. I cannot understand why Canon did not, yet they charge a king's ransom for it. Nikon will charge as much, if not more. I like good glass, but I don't like getting bent over so badly. For a pro top glass is a necessity, I know. Thank the lord I am just an amateur. I could go for this lens if it tests well.
Given the way Nikon has stepping up features even when it wasn't necessary to match Canon, I would not be surprised at all if they put VR in their next 24-70 and priced it the same or slightly less than canon's new 24-70. That is just the type of classy things they have been doing lately.
To match Canon? I thought Canon officially surrendered some time ago. No?
It is precisely because Nikon has been doing more than the bare minimum necessary to compete that it feels that way. Nikon seems like they try to include as much as they can and still make a profit while canon seems like they only include the bare minimum features to still make a sale.
Well it seems Canon had a not so great 24-70. They took up the IQ a bit and nothing else. Then they broke it off in users on the price, just for getting it right. They finally put a decent body on the 5D series and felt they were justified in breaking it off in users again for the 5DIII. It's like sadomasochism, Canon the sadist and its users the masochists. You guys don't know when to say "uncle".
very lens.
Yes, very.
I like very lenses. Mine are all very very.
I don't want to jump in on the old very vs indeed bandwagon, but to me it's more indeed. I dread the inevitable piling on by the die-hard totally folks. They are suuuuch losers!
What if we say this lens is very indeed? Is it soooooo totally lame?
I couldn't have said it any better myself.
Indeed, very lame.
Photos and a quick video of the lens^ Gives a good idea of the size, which IMO seems quite reasonable. IS, hypersonic motor, LD glass, weather sealing...it hits all the wickets at a VERY attractive price point. IQ and build quality are still up in the air, but if it delivers the goods then Tamron may have hit another homerun.
I consider Canon Lenses as a long term investment, I stick with the Red Ring...
I would say "wise" :)
it's true that these 3rd party lens drop value (as %) quicker then Canon/Nikon/Zeiss
however since the base for C/N/Z is also higher in absolute term you can lose more $
I have a 25 year old Sigma 70-210mm f2.8 from the 1980s. Its in perfect working condition with AF, metering etc etc. Just because its a 3rd party lens doesn't mean its flimsy.
There are plenty of well made 3rd party lenses as well. And this isn't Sigma, Tamron has a reputation of generally having few lemons in its line up.
For Canon/Nikon users this is a good alternative to the OEM versions since the OEM versions lack any IS/VR while being more expensive to boot.
Sony users have enjoyed stabilized 24-70mm lenses for decades now and since Tamron is removing the VC system while keeping the same price, it makes less sense to go for the Tamron.
Lenses are tools, not "long term investments". A lens will never appreciate in value like a "long term investment" is supposed to. The only way a lens can give you a true return on your investment is with the pictures and images it allows you to capture. That is where your true return on your investment resides! And in that respect, I think most people would rather have a lens with IS/VC rather than one without, because IS/VC allows you to capture more images in a broader range of shooting conditions, allowing you to get a better RETURN on your INVESTMENT.
"Sony users have enjoyed stabilized 24-70mm lenses for decades now and since Tamron is removing the VC system while keeping the same price, it makes less sense to go for the Tamron."
Sony Alpha has not been around for decades, not even one.
SNOB = brand fanboys
After seeing the price of the Canon 24-70 II, I am interested.
I am not. The old Canon 24-70 is about the same price and I am sure, it is optically better. And you are sure, you will have no problems on future bodies with Canon lens. I know, this is stabilized lens, but do you really need stabilized f/2.8 lens on today`s low noise, high-ISO bodies? I will never buy this lens for $1300, I rather buy older red-ring compatibility-safe lens...
I prefer IS capability (image stabilization) to high ISO settings anytime! People seem to forget that it's not just noise that gets worse with increasing ISO--dynamic range (DR) gets narrower, colour depth and rendition deteriorates, contrast decreases, etc. Check out the DR/ISO diagram of Nikon D800 at DXO Mark--it's quite a slope! High ISO is always a compromise. With image stabilization and a modest ISO setting, none of this happens and you're getting the best out of your sensor.
@IljaM - first of all, just because a lens has a max f/2.8 aperture doesn't mean that people are always going to shoot at f/2.8. Sometimes, you want to stop down for more depth of field.
Secondly, stopping down the aperture increases the optical performance of most lenses. Lenses are rarely as sharp at maximum aperture as they are stopped down a stop or two. So stopping down allows you to get the optimum image sharpness. And when you do that, suddenly IS becomes quite valuable!
Plus, not everyone likes to crank up the ISO just because you can.
Also, sometimes, you want to shoot at slower shutter speeds for creativity. You can shoot at surprisingly slow shutter speeds when using IS in conjunction with a monopod. So IS allows you to broaden the creative range of images you can take.
@all: I know it all. I shoot live concerts and similar events most of the time. And because, not only me is moving, but the photographed object is moving, too - stabilizer does not help me in these situations.
I know, lens are not optimal wide open. But all my L-lenses are great wide open and my 50mm f/1.4 at f/2.5 too. And no one lens has better bokeh stopped down, all lenses have the best bokeh wide open.So, I wish not to shoot high ISO, I need to do it. This is the reason why I will buy only high-quality (red ring) lenses and not hi-priced third party lenses...
MTF chart looks good. I can't wait to mount this!
I have the SP 24-135, SP 17-35 and SP 70-300 VC. They all worked pretty good with D700. I would believe this new SP 24-70 to be nearly as good as the original manufacturer's version. I just hoped that the actual retail price would be much lower than the current MSRP.
I hope this is optically as good as Canon 24-70 II. Or nearly as good.
Dream on...
it really depends on what's your definition of "nearly"
if it could be even cheaper and "IF" canon announce FF rebel...that would be perfect
Only a matter of time I think (3 years?) the market for APS-C is being impacted from below, hence the D800 arriving $1000 cheaper than expected. Sell an FF body, make FF money on FF lens sales.
let's hope it's 3 years! time to ditch APSC
ASPC will never go away. If it did the prices of the FF would have to come down dramatically. They only real reason to by a 5DIII over a 7D for example is the FF sensor. If rebel and or 7D class bodies had a FF sensor the 1DX/D4 type cameras would be going for half what they do now and the 5D type cameras wouldn't even exist. Canon and Nikon will never give up their huge full frame mark ups. Sorry.
If the APC-C market went away, the FF prices would go up since there would be less competing technologies. Having APS-C format alternatives means the FF sensor cameras cannot be excessively expensive so only the pros can afford them.
FF prices would not go up with out ASPC that is just silly since neither canon or Nikon would sell any cameras if the happened.
So price! Best choice standing Nikkor 24-70.
I own 4 Tamron lenses and all of them have some problems. Some more severe some less. Therefore I decided some while ago to stick with Nikon pro lenses. More money but less troubles.
I agree. I've tried many 3rd party lenses, and they are often inferior in white balance, AF, and/or flash exposure. If I were to choose between two lenses with identical specs, I'd choose Nikon in a heartbeat. The only problem here is that I value image stabilization GREATLY, and Nikon's lens pricing has gotten pretty ridiculous in the past few years, which is the only reason Tamron can also ask for this ridiculous price.
The price is not right.
world's first... yay
I personally can't wait to see a test on this lens. Some of my recent shots involve bery low light, long exposures, on the go. The IS on the 24-105 is great and makes shooting like this possible. But. I miss my 2.8 opening to actually see and hate switching primes all the time, which also slows me down a lot. My hopes are that this is as sharp as the new Canon 70-200 M II with equal IS correction, for which I would actually be happy to pay the asking price of Canons new 24-70 ( which I will get anyways, but that's me...)
You guys know the msrp is different vs street price right? It will probably go for $1,099.
Most Tamrons have been selling at or near MSRP lately, but Tamron always has rebates. Wouldn't be surprised if it is $1299 with a $100 rebate right from launch.
Canon's new version is close to $2400.00 nearly twice the price and does not have IS. The first version will probably go away soon just as they did with the 70-200 2.8 IS.
price is too close to canon. The IS feature won't be enough to cut into canon's sales IMO. At this focal length, IS is not as important. It needs to be $1k to tempt folks from canon's offering IMO unless canon discontinues the 24-70 2.8 MK I
pretty sure with the MK II the MK I will be discontinued.
It is already half of the Canon 24-70 II. If it is better than the Tamron 28-75 - this will be a winner.
I owned version 1 of the 24-70mm. The 28-75mm Tamron is a better lens (except in the corners wide open).. My Canon misfocused frequently, even after sending it to Canon for adjustment. The canon is superior in feel/build quality.
Looks like round two: Canon vs Tamron. I'll wait and see - but I wouldn't be surprised if the tammy's image quality is comparable to the Canon at twice the price.
"At this focal length, IS is not as important."-- Which focal length were you talking about? It goes from 24mm at the short end to 70mm at the long end. And on a 1.6x crop camera, it's the equivalent of 38.4mm to 112mm. Plus, IS just gives you more creative flexibility. Sometimes, I *want* to use as slow a shutter speed as I can get away with, and all I have with me is my monopod. You can shoot at surprisingly slow shutter speeds with a monopod and IS.
Plus, for many people, a bit less size and weight to lug around is desirable. Canon's 24-70/2.8L lenses are behemoths. The Canon 24-70/2.8L MKI is 953g, while this Tamron is 825g. The Tamron is also about 1.3cm shorter in length. It may not seem like much, but when you've been carrying it around all day long, you can feel it.
How many years have people said IS isn't needed at shorter focals even though Canon themselves are making 24mm IS primes?
having IS is good, but not a determining factor for me
and as for the IS canon wide primes, do they justify their price hike? your call
So not having IS and costing the same or more is better how?
Handheld video without IS ? Canon also launched 24 is 28 is primes. The lens is definitely enough good for full HD resolution.
A non-VC version for Sony but nothing for Pentax? That sucks.
Might have something to do with the fact that it is a full frame lens and Pentax doesn't make a camera with that size sensor.
Also, sadly, Pentax has been circling the drain lately. Hopefully Ricoh can pull them out, but I can't blame the lens makers for not wanting to take a risk.
looks like Tamron and sigma are giving up on Pentax already..
@tkbslc It's not the FF issue. Tamron has been making and selling FF lenses in K mount for years. And Tamron sells a boatload more lenses for APS-C in all mounts.
Unfortunately this reflects a lack of confidence in Pentax. Mitsuoka is right. Add to this the defection of Voigtlander and Zeiss last year.
As a Pentax owner I'm disheartened by thinning 3rd party support.
Tamron don't make lenses for Pentax mount any more, they stopped after the 10-24 was released about two years ago...
Tamron. I've gone through my share of Tamron lenses and I believe it will have typical Tamron's attributes:
1) Sharpness - almost as good as OEM (Canon or Nikon)
2) VC - superior to both Nikon/Canon (although they don't have in that range)
3) Contrast - always inferior to Nikon/Canon. Often yellow cast to photos. But can be dealt with in PP
4) AF - this is a biggie. Tamron has placed Ring AF in their latest 2 lenses (finally) but it just does not work nearly as good as Nikon and Canon AF (and Sigma is faster too). For some - it does not mater, it is silent but it is noticeably slower than OEM.
That is why I think, Tamron needs to price this thing much less, like $700 to make it work.
It's the only is/vr 24-70mm that you can get for Canon OR Nikon, and you think they need to make it $700 for it to work? it's already a lot cheaper than the none OS counter part from NIkon and Canon.
h0tsauce, IS isn't so important in this focal range.
It's important if the situation makes it important. It's definitely a helpful feature to have.
@Jack A. Zucker- IS "isn't so important" until you're in a situation where it's important. LOL. I don't think there's any doubt that IS can be quite valuable. You can shoot with IS from a moving car that's bouncing about, at a slower shutter speed, and still get amazingly steady shots with everything sharp inside the car, but with the outdoor environment motion blurred. You just can't do that with a non-IS lens. You might not think IS is not "important", but I see IS as a tool that can broaden and expand your creative possibilities. And I think that's a very valuable thing to have in photography.
totally...i shoot low light nite shots, hence the mk5iii on my eventual list...but i need a 2.8 lens with IS...i have that already on my rebel t2i and refuse to give up the 3 stops it gives me when i shoot at 1600...if i go to the mk5iii and get a canon lens, i will gain nothing without IS...i can shoot the mk5iii at 3200 but lose 2-3 stops without IS
...on my t2i i have the remarkable canon 17-55mm 2.8 IS, so much better than an earlier tamron, but since canon makes no such thing for a fullframe, i'm stuck wondering about this tamron...if it's as lousy as my similar tamron zoom (28-75 about 5 years ago) i would never consider another tamron...however, this sounds like it might truly be in the realm of canon glass quality...well, one can hope
just hunted down camera test of canon lens vs tamron, on the net at different mm and f stops. super vignetting and noticeable optical distortion beyond the canon...this is the problem i had with the 28-75 2.8 tamron i had 6 years ago...it was horrible in real world use from headshots to around town...from what i see, this is intrinsic of tamron and evident in this new lens...wish i had the link, but google image comparisons and you can find comparisons
If this is anything like the 70-300 VC, this lens will be an absolute killer.
No one knows, but I have an order in for two :)
Haunted by the past!
I got many OEM lenses before and almost all of them are now in the unused shelve. For this reason alone I will think twice and inspect samples when more people are actually using it. Using OEM is often a compromise and there are the associated risks. For RRP 1299 (even for a, say, 40% discount) I would not wear the risk. YMMV
you realize OEM means original equipment manufacturer right? i.e. Canon and Nikon. So this comment seems backwards.
Seems a lot of people are assuming that this lens will give comparable performance to the Nikon or Canon equivalents. That's a big if. If it performs like the first Tamron 17-50 2.8 I would buy it, but not for $1299. For that money, I'd either do without VR, and buy the Nikon AF-S 28-70 2.8 or I'd buy the 24-120 f4 VR and have better range for the same money or spend a few hundred more for the ultimate standard zoom, the Nikon AF-S 24-70 2.8G.
No, I've been waiting for this lens, but the price is too high for a 3rd party lens even with VC.
So their update to their 28-75 f/2.8 costs $1200 adding IS? I bought the 28-75 5 years ago at $330. Adding IS should not increase the lens price by $900.
The Tamron 28-75 is actually $499 today. It really can't compare with the new version:
. No VC
. No ultrasonic focus
. 4mm at the wide end (which is much more difficult to make than the 5mm at the long end)
. Not moisture resistant
Also, the old 28-75 was rather soft wide open, especially on full frame. I owned one and sold it.
Canon's went up $900 and they didn't add anything to the wide angle or add stabilization.
I wish this lens to be a huge success. Competition is good
Yay for a healthy competition!
This is a perfect mate to D800, it's optics should be on par to the Nikkors.
are you sure?
That's a huge unknown, and I wouldn't expect this lens to have Nikon 24-70 2.8G performance. I'm hoping it performs as well as the Tamron original 17-50 2.8 though.
Tamrons are rather good optically, why don't you read tests comparing the 17-50 Tamron and Nikkor 17-55. Build quality (and price aside) they are not too different.
@Der Steppenwolf Yes but comparing the Tamron 28-75 2.8 which this lens replaces to the Nikon 24-70 2.8G and you'll find there is no comparison. It's much easier to make a good lens for APS-C than for FF, and that's the challenge that this lens faces.
Yes, I am sure. I have Tamron 70-200/2.8 and 180/3.5, both have better optics than Canon L counterparts. The 28-75 is also not far behind. Look at the spec of this lens, Tamron is putting all the best glass they have, should be no less than the aforementioned glasses.
it's good to know
D800, please shoot with prime or f5.6-f11.
@ 654D - You state "Tamron 70-200/2.8 and 180/3.5, both have better optics than Canon L counterparts" - are you kidding. I believe your trying to convince yourself. Simply ask yourself, do you see any protogs using Tamron, or do you notice the red ring.???. That said, I really do hope this 24-70 the very best of luck, but paleeez dont kid yourself or anyone that it will compare optically with the red rings. You get what you pay for.
Have you actually used the 17-50? I get horrible flash overexposure because the lens doesn't report the right distance information to the body. I hope this new lens doesn't have that problem.
The lens shown in the photo has Nikon's counterclockwise zoom from wide to tele. Does the Canon version rotate in the opposite direction, as actual Canon lenses do?
I was hoping for the same thing but I don't think Tamron will give us that
It is the same movement. But the the mm-numbers are on the ring on Canon , and on the static part on the tamron.
oysso, you've got us wrong..
pretty sure Tamrons rotate the same as Nikons, whereas Sigma goes the same way as a Canon. I think Tokina are the only people who swap the rotation for the two mounts.
|Smile Ilford FP4 by DigitalTed
from My favourite Film
|Canadian Touring Car Championship by Kees77
from Camaro
|DSC_7951_k by floggy
from Retro: Jukebox
Follow us


text:
Breathing Problems: Using a Metered-Dose Inhaler
Diseases affecting the lungs—such as asthma, emphysema, chronic bronchitis, and chronic obstructive pulmonary disease (COPD)—share many of the same medicines. These medicines are often delivered through a metered-dose inhaler (MDI).
Using an MDI:
- Delivers most of a measured dose of medicine directly to your lungs.
- Can help keep your symptoms under control and minimize long-term damage to your lungs.
- May prevent or reduce side effects of the medicine.
- May let you use less medicine than is found in a pill but get the same effect.
- May result in the medicine working faster than a pill form.
A metered-dose inhaler (MDI) is a handheld device that delivers a measured dose of medicine directly to your lungs. The medicine is usually in an aerosol form.
Using a spacer with an MDI is the most efficient way to get the most medicine to your lungs. A spacer functions as a "holding" area for the medicine before you inhale. Using a spacer with your MDI can improve the delivery of the medicine and help you if you have problems with releasing the medicine as you inhale. It might help to practice using the MDI and spacer in front of the mirror. A spacer should always be used with inhaled corticosteroids to avoid side effects.
An MDI can be used to give different types of medicine. The type of medicine in your inhaler will depend on what type of medicine you need to treat your specific condition. For example, the inhaler may contain a medicine to prevent an asthma attack or medicine to help relieve the symptoms of COPD.
For some medicines, you may need a certain type of MDI. Always check with your doctor and pharmacist when getting a new MDI.
Test Your Knowledge
Using a metered-dose inhaler (MDI) is beneficial because:
- It provides a puff of medicine in an accurate, measured dose.
- It can help keep your symptoms under control and minimize long-term damage to your lungs.
- When an MDI is used effectively, most of the medicine is delivered directly to your lungs and does not travel throughout the body. This may prevent or decrease side effects in the rest of your body.
- You may be able to use less medicine than is found in a pill but get the same effect.
- The medicine may work faster than a pill.
Test Your Knowledge
An MDI may help avoid side effects of medicine.
This answer is correct.
An MDI may help avoid side effects of medicine because, when used effectively, most of the medicine goes to your lungs and does not travel to other parts the body.
This answer is incorrect.
An MDI may help avoid side effects of medicine because, when used effectively, most of the medicine goes to your lungs and does not travel to other parts of the body.
Getting started
- Talk with your doctor to be sure that you are using your MDI correctly. It might help if you practice using it in front of a mirror. Use the inhaler exactly as your doctor has prescribed.
- Check that you have the correct medicine. If you use several inhalers, put a label on each one so that you know which one to use at the right time.
- Check how much medicine is in the inhaler. Check the label of your inhaler medicine to see how many inhalations should be in the canister. If you know how many breaths you can take, you can replace your inhaler before you run out. Learn how to test your canister to estimate how much medicine is left. Your doctor or pharmacist can help you with this.
- Use a spacer if you have problems getting the correct timing when you use an inhaler or if you are using corticosteroids.
Using an MDI
Using a spacer with an MDI is the most efficient way to get the most medicine to your lungs. Make sure you understand the proper use of an:
Although using an MDI with a spacer is usually recommended, you can also use an MDI without a spacer. Learn the proper use of an:
If you are using a corticosteroid inhaler, rinse your mouth out with water after use. Don't swallow the water. Swallowing the water will increase the chance that the medicine will get into your bloodstream. This may increase the side effects of the medicine.
Some powder may build up on the inhaler, but you may not need to clean the inhaler every day. Follow the directions for how and how often to clean the type of MDI you have.
Test Your Knowledge
Using a spacer with an MDI is the most efficient way to get the most medicine to your lungs.
Now that you have read this information, you are ready to start using a metered-dose inhaler.
Talk with your doctor
If you have questions about this information, take it with you when you visit your doctor.
Return to topic:
Last Revised: February 19, 2013
Author: Healthwise Staff
Medical Review: E. Gregory Thompson, MD - Internal Medicine & Ken Y. Yoneda, MD - Pulmonology
This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.
To learn more visit Healthwise.org
© 1995-2013 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.


text:
Plus Blog
November 1, 2008
Saturday, November 01, 2008
With US election week upon us, we thought you might appreciate a look at alternatives to the first-past-the-post system used to elect the US President and Congress, as well as the UK government, and many others around the world.Read more...
Labels: Latest news
posted by Plus @ 1:21 PM
October 28, 2008
Tuesday, October 28, 2008
History of maths writing competition
The History of Mathematics Special Interest Group of the Mathematical Association of America (HOMSIGMAA) has just launched a writing competition for undergraduates. The MAA invites students to write on any topic in mathematical history they choose, and winners will receive a year-long MAA student membership, as well as books from the MAA bookstore. Closing date is the 31st of March 2009. For more information, visit the HOMSIGMAA website.
And if you're not a student, or want to write about something other than history, or simply want to be published in Plus, then don't forget our very own Plus New Writers Award 2009. Besides the fame and glory of appearing in Plus, you could win an iPod and selected books. Closing date 31st of March 2009!
posted by Plus @ 4:14 PM
0 Comments:
October 28, 2008
Tuesday, October 28, 2008
Plus is proud to bring you a brand new regular feature: the Plus sports page. This will be regularly updated with stories exploring the maths in sports, from analysing scoring statistics to planning the perfect strategy.
We start off by looking at — what else? — football. Being the manager of a Premier League football club may seem like one of the most glamorous jobs in the world — with the fame comes fortune and the opportunity to travel (well, to Hull, Wigan and Portsmouth anyway). However, as far as job security goes, football managers live on the edge. Their terms can be terminated almost on a whim by their club's owner, and they live and die by their team's results.
It would seem that there is no way to predict how long their tenures will be. However, a collection of researchers from the UK, Singapore and the US have found that there may be a strong mathematical trend underlying how long football managers stay in their jobs.
Labels: sports
posted by Plus @ 11:59 AM
1 Comments:
October 21, 2008
Wednesday, October 22, 2008
Mathematical moments - How to price derivatives
The 1997 Nobel Prize in Economics
It's hard to believe these days, but bankers do occasionally base their decisions on rational and robust bits of mathematics. A central player in this context is the Black-Scholes equation, which won its discoverers the Nobel Prize in Economics almost exactly 11 years ago, on the 14th of October 1997. The Black-Scholes equation is a partial differential equation which tells you how to price options. An option is a way of reducing risk: it's a forward contract giving you the opportunity (but not necessarily the obligation) to buy a certain commodity or stock, for example fuel, at some specified time in the future for an agreed strike price. An option is an example of a so-called derivative, because it derives its value from the underlying variable (the price of the fuel).
Derivatives and options, as we all now know, can be traded in their own right, and have the potential to make people very rich, but also to break the bank (as happened literally with the Barings Bank in 1995). One important question if you're in the business of trading derivatives, is how much they should cost. Since options are all about the future, it may seem as if pricing them should involve a certain amount clairvoyancy, but in fact the Black-Scholes equation does it all for you (for a type of option called a European call). All you need to know to use the equation are the current price of the stock and strike price of the option, the expiry time of the option, the interest rate and an estimate of the versatility of the stock.
In their original 1973 paper Black and Scholes built their model on the assumption that the stock price was a function of a Brownian motion. A Brownian motion is a random motion, as you would expect to see when you let a particle float in a liquid or gas. Mathematically, you can describe it as a stochastic process: at any given time, the stock price (or the particle) moves up or down (or, with a particle, in any of the available directions) with equal probability. Using this model for stock price behaviour, Black and Scholes found that the problem of pricing an option becomes equivalent to that of solving the heat equation from physics.
The original Black-Scholes model made some simplifying assumptions, for example that shares don't pay dividends, but it is possible to work around many of these and obtain more sophisticated and comprehensive models. These have been at the heart of financial mathematics ever since. Unfortunately, Fischer Black died two years before the award of the Nobel Prize, so Myron S. Scholes and Robert C. Merton (who's name isn't attached to the equation) ended up sharing it.
If all of this makes you wonder who should really be blamed for the current financial crisis, read the Plus article Is maths to blame?
For more in-depth information on derivatives, read the Plus article Rogue trading?
posted by Plus @ 12:17 PM
2 Comments:
October 21, 2008
October 20, 2008
Tuesday, October 21, 2008
The Internet is huge. With mobile phones and other devices now being hooked up as well as computers, it will soon comprise many billions of endpoints. In sheer size and complexity the Internet is not far off the human brain with its hundred billion neurons linked up by around ten thousand trillion individual connections. If you're finding it hard even to read these huge numbers off the page, how can anyone be expected to cope with complexity on this vast scale? While mathematical tools that deal with complexity have experienced rapid development it recent years, there still isn't an overarching science of complexity, a mathematical toolbox serving everyone who's dealing with it in whatever shape or form.
This month a group of experts from a range of different areas got together in Cambridge to try and remedy the situation. It was the first ever meeting of the Cambridge Complex Systems Consortium. Delegates included a climate scientist, a former head of MI6, a neuroscientist, a sociologists, and a mathematician. Plus went to see them, to learn about their struggle with complexity.Read more...
Labels: Latest news
posted by Plus @ 10:28 AM
0 Comments:


text:
Skip Hop diaper bags are designed to carry everything you and your baby need, the way you want to carry it. Available in an assortment of great colors and fabrics that look great on both moms and dads, there are several sizes and styles to meet your specific needs. The duo diaper bag is what made Skip Hop famous. Now they have added the duo double diaper bag for multiple children, the dash diaper bag with a more hip and urban shape, and the expo diaper bag which ingeniously unzips to add 50% more interior space.
Skip Hop diaper bags are designed with numerous compartments to keep baby's essentials easy to find, while your items stay safe from wet and messy things. Best of all is the Skip Hop innovative strapping system that lets you fasten the diaper bag onto any stroller - so easy! Just snap it on and take off!


text:
48 U.S. Code § 1491 - License, permit, etc., for transportation for storage or storage of spent nuclear fuel or high-level radioactive waste; prerequisites; applicability; "territory or possession" defined
prev | next
(a) Prior to the granting of any license, permit, or other authorization or permission by any agency or instrumentality of the United States to any person for the transportation of spent nuclear fuel or high-level radioactive waste for interim, long-term, or permanent storage to or for the storage of such fuel or waste on any territory or possession of the United States, the Secretary of the Interior is directed to transmit to the Congress a detailed report on the proposed transportation or storage plan, and no such license, permit, or other authorization or permission may be granted nor may any such transportation or storage occur unless the proposed transportation or storage plan has been specifically authorized by Act of Congress: Provided, That the provisions of this section shall not apply to the cleanup and rehabilitation of Bikini and Enewetak Atolls.
Source(Pub. L. 96–205, title VI, § 605,Mar. 12, 1980, 94 Stat. 90.)
Termination of Trust Territory of the Pacific Islands
For termination of Trust Territory of the Pacific Islands, see note set out preceding section 1681 of this title.
LII has no control over and does not endorse any external Internet site that contains links to or references LII.


text:
25 U.S. Code § 3013 - Enforcement
prev | next
The United States district courts shall have jurisdiction over any action brought by any person alleging a violation of this chapter and shall have the authority to issue such orders as may be necessary to enforce the provisions of this chapter.
Source(Pub. L. 101–601, § 15,Nov. 16, 1990, 104 Stat. 3058.)
LII has no control over and does not endorse any external Internet site that contains links to or references LII.


text:
Let There Be Surf Wall Decal
No longer available
Cool street art is transformed into a no-damage decal that surfs your walls with adventurous style.
26.25" wide x 31.25" high
Our peel-and-stick decal is easy to apply, reposition and remove.
Decals make a fast, no-fuss alternative to messy paint and stencils.
Self-adhesive backing removes without any surface damage.
Made of vinyl.
For best results, mount to a smooth surface.
Decal comes in one piece.


text:
About Us
Founded in 1998, the Garretson Resolution Group (GRG) is a neutral provider of services to parties who are settling personal injury claims. Each year we resolve over 100,000 healthcare obligations for thousands of firms and companies across the country. Our Resolution & Compliance Program includes: Healthcare Lien Resolution; Medicare Set-Aside (MSA); Medicare Secondary Payer (MSP) Consulting & Mandatory Insurer Reporting; and Complex Settlement Administration. Whether we are engaged to provide services in a single event personal injury settlement or as the Administrator in a mass tort settlement program, GRG's specialized administrative offerings utilize proven technology and processes to serve all settling parties' interests including defendant, carrier, plaintiff counsel, claimant, court and healthcare agencies. Our practice areas can independently or collectively assist in any settlement. Our qualifications are straight-forward:


text:
Isn't that weird, though? I'm excited to start this deployment. What's even more bizarre? We haven't argued once in the last month. And usually we have one before a deployment. We're not an argue-ish kind of couple, so I've noticed the handful of spats we've had during our marriage. And without fail, there's one leading up to deployment, which is typical and expected and TOTALLY ABSENT THIS TIME. It's so weird.
The thing I wish to wank about today is political rather than Navy-ical. WARNING below!*
All this bollocks with birth control, personhood, transvaginal ultrasounds, etc. -- what many have termed a War on Women but might more rightly be called Putting Women Back in the Kitchen and Taking Away Her Shoes -- has been discussed. Folks with greater insight and more eloquence have already touched on various aspects of the issue. Sara Robinson discusses why birth control scares men and women who rely on the patriarchy. Author and soldier Jessica Scott discusses why she is not a slut. And in case we're concerned about equating lack of insurance coverage of birth control with outlawing birth control, don't forget personhood bills and amendments, as well as Steve King's view of birth control. Oh, yeah. And Santorum's:
I particularly enjoyed Jon Stewart's take on this whole, heaping pile of bullshit:
Jon, you're my hero.
I've heard rebuttals to the attack on reproductive rights and birth control, and they've been solid. I won't rehash them here. But there's one argument that I have not heard, and it's bothering me.
Some have come close to that argument when they ask whether an employer's religious beliefs can overrule an employee's personal ethics and medical needs. But here's my beef: why does an employer's religious beliefs take precedence over MY religious beliefs?
Allow me to explain.
My religion has at its core a recognition of the sacredness of sex--not just for procreation, though. That's a happy possibility for those who wish to procreate and to work spiritually through parenthood. But sex itself is a means of spiritual bonding between two people. It can also elevate spiritual awareness. But for day-to-day purposes, it is a foundation of a healthy whole being.
For this reason, sex is a sacred right, a foundational corner to my spirituality.
Similarly, what happens in my uterus is a piece of my spirituality. It is the root of much of my foundational justice, self, and power. It is a crossroads of a sort, and in my religion, crossroads are muy importante and not to be treated lightly. To explain my view, I'm going to quote straight out of The Pagan Book of Living and Dying, which explains this view via abortion:
...we came to reject the dichotomy politics that would require women to choose between two beliefs: that pregnancy is a miracle, the fetus's life is sacred, and therefore abortion is wrong; or that pregnancy is merely a physical event, the fetus is just a mass of tissue, and therefore abortion is insignificant. As feminists and Pagans, we believe that women are literally a gateway between the worlds and that abortion is a responsible exercise of the sacred power of choice. (237)(BTW, if you need healing, mourning, or aid in any fashion related to death or dying -- including the death of possibility via abortion -- this book is full of excellent discussion, ritual ideas, and poetry, and I highly recommend it.)
I am a physical manifestation of the Divine, and my gateway is my responsibility. I have the right to use whatever means available to me (and all hail birth control!) to get pregnant, to avoid pregnancy, to stay pregnant, to terminate pregnancy, etc. But it's not just my right. It's my sacred duty to be self-aware and aligned spiritually, and to know from that whether my womb is meant to bring new life or to act as the crossroads of my power.
These are my religious beliefs. And they are just as important as those of my employer or my husband's employer. When I am denied coverage for birth control that will keep me healthy and keep my womb viable for future pregnancies, that is infringement, especially when other medications are covered and no religious person is directly contributing a dime to my birth control. It is infringement on my ability to practice my religion, and it is an infringement on my right to equal treatment.
When congresscritters wonk about the evils of birth control, when they say I am not entitled to my sacred responsibilities, they infringe on my religious beliefs...because they feel their own take precedence. If they're so concerned about "family values" and "social health" as defined by their religion, why aren't they happy to allow me to live by the ideals of "family values" and "social health" my religion calls for?
So to those decrying the trampling of your religious convictions, I volley that one right back atcha. Sorry to tell you, my precious little cuntcakes, but you can't have it both ways. If you get freedom of religion, so do I. If you are entitled to freedom from my religion, then I, too, deserve to go about my life without having my needs and rights trampled by your religion. And if you take issue with this fact, you ought to build a time machine and make your case to our founding fathers, who made their opinions pretty fucking clear. When your argument is invalid because provisions have been made for your personal stance, you need to carry on with shit that really matters. Like the economy. Jobs. And priests diddling kids while bishops and cardinals spread their robes to cover it all up.
* Though I invoke the politically savage word abortion within this post in order to craft a full view of a definition, I don't want to read comments about abortion since we as a nation are completely incapable of having a rational, logical discussion on this topic. If you comment and need to invoke the a-word, fine. But if your comment does not add to the discussion, is used only to broadcast to everyone whether you are pro-life or pro-choice, or is meant to stir the abortion pot, I will probably delete it. Or disemvowel it. Possibly call you a twatbottle or a taintraider. You've been warned.


text:
Geomorphology Vignettes
These illustrated essays have been contributed by participants in the Teaching Geomorphology in the 21st Century workshop in 2008. The vignettes are drafts that are being written and revised by the participants and are not finished products.Help
Show all pages
Vignette Typeshowing only Computation Show all Vignette Type
Subject: Geomorphology Show all Subject: Geomorphology
- 1 match General/Other
- Arid Region Geomorphology 5 matches
- Climate/Paleoclimate 4 matches
- Dating and Rates 11 matches
- GIS/Mapping/Field Techniques 12 matches
- Landforms/Processes 26 matches
- Landscape Evolution 16 matches
- Modeling/Physical Experiments 17 matches
- Tectonic Geomorphology 3 matches
- Weathering/Soils 4 matches
- Geomorphology as applied to other disciplines 4 matches
Vignette Type Show all Vignette Type
Computation32 matches
Results 1 - 10 of 32 matches
(Sediment) Accounting 101: An Example
Chuck Podolak
I. Introduction Rivers transport both water and sediment [rock fragments such as sand and gravel] from hillsides to the oceans. As sediment moves downstream it creates river bars, accumulates into floodplains, and ...
Vignette Type: Computation, Process
Marine Geomorphology: Geomorphic Processes, Hazards, and Paradoxes in Monterey Canyon
Douglas Smith
Introduction While traditional geomorphic studies focus on the geologic processes and products that shape our terrestrial topography, there are equally exciting opportunities to explore the other 71% of the planet ...
Vignette Type: Process, Computation
The Occurrence of Small-Scale Debris Fans in Sandstone Landscapes of the Central Appalachians
Steve Taylor
Alluvial fans occur in diverse landscapes, and represent critical sites of sediment routing in mountainous watersheds. These radiating, wedge-shaped deposits of sediment are commonly associated with high-energy ...
Vignette Type: Process, Computation
Predicting the effect of changing climate on landscapes with computer based landscape evolution models
arnaud temme
Predicting the effect of changing climate on landscapes with computer based landscape evolution models. Future climate change will influence the processes that shape our landscapes. Knowing this influence is ...
Vignette Type: Computation
Soil-water-rock interactions I: The pediment problem
Mark Strudley
You may have not initially appreciated that piedmonts (landscapes between steep mountain masses and depositional basins) are not all covered by alluvial fans. In fact, piedmonts, along with adjoining low-relief ...
Vignette Type: Process, Computation
Soil-water-rock interactions II: The formation of tors in arid and semiarid environments
Mark Strudley
The prominence of bedrock edifices above essentially featureless, erosional pediment surfaces underscores the crux of the 'pediment problem' that has baffled geologists since 1877(described in the Part I ...
Vignette Type: Process, Computation
Some useful Non-dimensional Numbers in Geomorphology and the Art of Deriving New Ones
Nikki Strong, University of Minnesota-Twin Cities
Units of Measure One can express physical quantities in terms of many different units of measure and a particular quantity can take on very different numerical values under different unit systems. For example, ...
Vignette Type: Computation
Topographic signatures of lithologies in the Modi Khola valley of central Nepal
Lisa Walsh, University of Maryland-College Park
Rock resistivity to erosion plays a vital role in the evolution of the Earth's topography. Since different rock types exhibit different levels of resistivity to erosion, the more resistant rock types tend to ...
Vignette Type: Computation, Process
Digital Topography: Should you choose a TIN or raster interpolation of the landscape?
Lisa Walsh, University of Maryland-College Park
The recent explosion of Geographic Information System (GIS) tools enable geoscientists to visualize the Earth's surface in three dimensions using digital topography. Digital topography can be represented in ...
Vignette Type: Process, Computation
A general bedload transport equation for homogeneous grains
Peng Gao
Bed load is one of two types of sediment load (the other one suspended load) transported in natural rivers (Fig. 1) and is originated from channel bed or banks. Although it only takes about 5% to 20% of the total ...
Vignette Type: Computation, Process


text:
Does this happen to anyone here?
If so, do you know what causes it? Once I stop laughing the pressure/pain eases up. This is not a normal pain from laughing......its different. Sometimes it hurts so bad that I have to stop laughing to make the pain/pressure ease up.
On rare occasions I notice it hurting even when no laughter is involved. At that time it is dull pain and pressure right at the base of my skull.
Recognize the risks associated with Crohn's disease.
Did you know that one in six US adults has high cholesterol?
Prevent the spread of the hepatitis C virus.
With COPD, it's important to protect your lungs.
Unmanaged depression can take a toll on your physical health.
What, when and how much you eat affects your blood sugar.
Ease your way into these stretching and strengthening moves,


text:
46 U.S. Code § 53910 - Administrative
prev | next
(a) Accordance With Commercial Practice.— In carrying out this chapter, the Secretary of Transportation may act in accordance with commercial practice in the marine insurance business.
(b) Regulations.— The Secretary may prescribe regulations the Secretary considers appropriate to carry out this chapter.
(c) Policies, Rates, and Annual Fees.— The Secretary may prescribe and change forms and policies, and fix and change the amounts insured and rates of premium, under this chapter.
(d) Annual Fees.— The Secretary may charge and collect an annual fee in an amount calculated to cover the expenses of processing applications for insurance, employing underwriting agents, and appointing experts under this chapter.
(e) Payment of Claims and Judgments.— The Secretary may settle and pay claims, and pay judgments against the United States, related to insurance under this chapter.
(f) Underwriting Agents.—
(1) In general.— The Secretary may, and when the Secretary finds it practical to do so shall, employ a domestic company or group of domestic companies, authorized to do marine insurance business in a State of the United States, to act as underwriting agent for the Secretary. The services of an underwriting agent may be used in adjusting claims, but a claim may not be paid until approved by the Secretary.
(2) Compensation.— The Secretary may allow the company or group of companies reasonable compensation for services as the underwriting agent. The compensation may include an allowance for expenses reasonably incurred by the agent, but may not include any amount for soliciting or stimulating business.
(g) Fees For Arranging Insurance.— Except as provided in subsection (f)(2), the Secretary may not pay an insurance broker or other person acting in a similar intermediary capacity a fee or other consideration for participating in arranging insurance when the Secretary directly insures any of the risk.
(h) Employment of Marine Insurance Experts.— The Secretary, without regard to the laws and regulations on the employment of Federal employees, may appoint and prescribe the duties of experts in marine insurance as the Secretary considers necessary to carry out this chapter.
(i) Services of Other Government Agencies.— With the consent of another agency of the United States Government, the Secretary may use information, services, facilities, officers, and employees of the agency in carrying out this chapter.
Source(Pub. L. 109–304, § 8(c),Oct. 6, 2006, 120 Stat. 1630.)
|Revised Section
|Source (U.S. Code)
|Source (Statutes at Large)
|46 App.:1289(c) (1st sentence).
|June 29, 1936, ch. 858, title XII, § 1209(a)(1), (b)–(f), as added Sept. 7, 1950, ch. 906, 64 Stat. 775; Aug. 3, 1956, ch. 929, § 1, 70 Stat. 984; Pub. L. 94–523, § 4, Oct. 17, 1976, 90 Stat. 2474.
|46 App.:1289(a)(1) (1st–19th words).
|46 App.:1289(b) (1st sentence).
|46 App.:1289(b) (last sentence).
|46 App.:1289(a)(1) (20th–last words).
|46 App.:1289(d).
|46 App.:1289(c) (last sentence).
|46 App.:1289(e).
|46 App.:1289(f).
|46 App.:1283(a) (last sentence).
|June 29, 1936, ch. 858, title XII, § 1203(a) (last sentence), as added Sept. 7, 1950, ch. 906, 64 Stat. 774; Pub. L. 94–523, § 1, Oct. 17, 1976, 90 Stat. 2474.
Subsection (e) is substituted for "may adjust and pay losses, compromise and settle claims, whether in favor of or against the United States and pay the amount of any judgment rendered against the United States in any suit, or the amount of any settlement agreed upon, in respect of any claim under insurance authorized by this subchapter" to eliminate unnecessary words.
LII has no control over and does not endorse any external Internet site that contains links to or references LII.


text:
Narciso Rodriguez
Python Criss-Cross Wedge Sandal
Product Actions
Exclusively Ours!
Python and grained leather open toe sandal with wide criss-cross bands and covered wedge heel. Thin lizardskin strap at vamp features a tonal elastic inset for a comfortable fit.
This item cannot be shipped to California.
Style # 502388010
Best known for his clean lines and use of bold color, American-born Narciso Rodriguez's womenswear, shoes and bags are beautifully tailored, confident designs that make every woman look and feel runway ready.
Need Help? Have Questions? Contact Us.
Please call 1.888.222.7639 to speak with a Customer Service Representative.
We're here to help you:
Monday - Friday, 9 AM - 9 PM (ET)
Saturday - Sunday, 10:30 AM - 7 PM (ET)
If you prefer email, we can be reached anytime at firstname.lastname@example.com.
Free Shipping & Returns on all U.S. Orders. See Details.


text:
Transcript Requests
Unofficial Transcripts
If you have attended recently, Unofficial transcripts can be printed from My VolState via the PRIDE tab. You will need your username and password to access My VolState. If you do not have that information, please contact our office at (615)230-3466.
Official Transcripts
To send an official copy of your VolState transcript, please submit a request. Requests can be made in writing or thru My VolState via the PRIDE tab. Written requests should include the following information:
- Your name
- Your address
- Your student ID number or date of birth
- Instructions as to where and how (fax, mail, email) the transcript should be sent
- Your signature
- The date
The information above can be provided on our Transcript Request Form or hand written onto a plain sheet of paper.
Requests can be submitted several different ways:
- Deliver it in person to the Records & Registration Office
- Fax the request to (615) 230 - 3645
- Mail the request to:
Transcripts/Records & Registration
Volunteer State Community College
1480 Nashville Pike
Gallatin, TN 37066
Please allow 2 working days during the semester and 5 working days at the beginning and end of each semester for transcript service.
If you have any questions, please contact us at (615) 230 - 3466 (toll-free: (888) 335 - 8722, extension 3466).


text:
Rock GO Launcher Theme
by Freedom Design
Developer Notes
If you like this theme, Please give us the score in the market!check out our other themes. Click on "More from the developer"or search for Freedom Design here in the market.
GO launcher theme is only available for phones with GO Launcher EX installed.
Search "GO Launcher EX" on Google...