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Title: Quality optics!
Review: This is an entry-level "L" white lens, but its optics are quite sharp even wide-open. It is definitely sharper than theCanon EF 70-300mm f/4-5.6 IS USM Lens for Canon EOS SLR Camerasand has similar optics to the much more expensive and heavierCanon EF 70-200mm f/2.8L IS USM Telephoto Zoom Lens for Canon SLR Cameras.The main difference? No image stabilizer and it is slower than it's f/2.8 brother. But if you are going to use a monopod/tripod or have good lighting to get some faster shutter speeds in, don't hesitate to buy this lens.PRO:- Cheap, compared to other L class lenses.- Can take in 1.4x extender with little impact on image quality (IQ).- Very sharp, similar sharpness to its more expensive brothers.- Very light weight! Other 70-200mm lenses in Canon's line are heavy!CON:- Not fast, not slow, the f/4 is just right for ideal situations or flash. Low light won't work.- Not weather sealed (though it will endure, it is still pretty solidly built compared to plastic lenses).
