Fujifilm X100

The Fujifilm X100 is a series of digital compact cameras with a fixed prime lens. Originally part of the Finepix line, then becoming a member of the X series from Fujifilm, the X100 series includes the FinePix X100, X100S, X100T, X100F, and X100V. They each have a large image sensor and a 23 mm lens (35 mm equivalent angle of view in full frame format). All five cameras have received generally positive reviews.
Fujifilm FinePix X100.
The Fujifilm FinePix X100 was initially shown at the photokina show in September 2010 and was subsequently introduced in February 2011. It was the first model in the Fujifilm X-series of cameras and has since been joined by numerous models. It is superseded by the Fujifilm X100S.
Innovation.
The FinePix X100 was the first camera to show a number of new technologies developed by Fujifilm. These include a hybrid viewfinder which allows the user to choose between a conventional optical viewfinder with an electronic overlay, or an electronic viewfinder. The combination of APS-C sized CMOS sensor, EXR processor and 23mm (35 mm equivalent) fast aperture lens was also a first.
Reception.
The X100 received generally favourable reviews and a number of awards. These include Innovative Camera of the Year from Ephotozine and Best Premium Camera in the 2011 TIPA awards.
In most cases, the prizes were awarded for the combination of technology and picture quality, but the X100 has also received plaudits for its design outside the photography market, coming top of Stuff magazine's Cool List for 2011 and in October 2012 receiving Good Design Award from Good Design Award (Japan).
"Digital Photography Review" gave it a score of 75% and a silver award, noting that it ""combines excellent image quality, solid build and a superb viewfinder with somewhat sluggish and quirky operation", "adding that" ""It's been much improved by multiple firmware updates since its initial incarnation, and despite its flaws, is now a very likeable camera indeed".".
Issues.
Some X100 cameras have reportedly suffered from 'sticky aperture disease' where the aperture blades lock up, leading to overexposure. Fujifilm has acknowledged this issue and will fix it under warranty.
On initial release the X100 was widely reported to have various issues. Many, but not all, of these issues were fixed through a series of firmware updates made available by Fujifilm.
Fujifilm X100S.
The Fujifilm X100S (Second) is the successor to the Fujifilm FinePix X100. Announced in January 2013, it is a model similar to the X100 yet addressing some of the issues that the X100 had, and resembles it superficially, but with internal changes. It has been compared with the Leica M series.
It was replaced in September 2014 with the Fujifilm X100T.
Reception.
The X100S received generally positive reviews: 
Fujifilm X100T.
The Fujifilm X100T (Third) was announced by Fujifilm on September 10, 2014. It is the successor to the X100S. It is visually very similar to the X100S, and shares many of its core specifications (including its lens and sensor), but features numerous iterative refinements and enhancements. It has the same 16.3 MP Fujifilm X-Trans CMOS II sensor as the X100S.
It was replaced in January 2017 with the Fujifilm X100F.
Reception.
The X100T has received generally positive reviews:
Fujifilm X100F.
The Fujifilm X100F (Fourth), announced on January 19, 2017 is the successor to the Fujifilm X100T. It features a number of improvements and refinements over the previous model, many of which were first introduced with the Fujifilm X-Pro2. The X100F was released on February 23, 2017.
Reception.
The X100F was very well received, mostly for its improved sensor and autofocus capability. "Digital Photography Review" gave it a score of 83% and a gold award, calling it "a true photographers' camera". At the 2017 Technical Image Press Association Awards, the X100F won the award for best professional compact camera.
Fujifilm X100V.
The Fujifilm X100V (Roman Numeral "Fifth"), announced on February 4, 2020 is the successor to the Fujifilm X100F. It features a redesigned lens, the 4th generation of X-Trans sensor, a 2-way tilting rear LCD screen, and an “optional” weather resistance. The camera also includes the new film simulations and other software tricks. The X100V is $100 more expensive that its predecessor, the X100F. With its upgraded glass, it should exhibit less distortion than the previous X100 cameras and has should have an improved close focus performance.
Reception.
The X100V is a well received camera, being praised for its updated sensor that offers good noise performance and fast readout as well as its highly tunable JPEG engine that reduces noise very well producing good detail. It's also praised for its 4k recording feature, a first for the series. Digital Photography Review gave it a score of 86% and a gold award, calling it "The most capable prime-lens compact camera, ever".
Accessories.
Due to their similarities, the different X100 cameras accept many of the same accessories.