Lenses

Build quality
Optical quality
Value for money
Overall

Cons: price ?

Pros: sharpness, weight compared to 2.8 version, opticalquality

Summary: very good lens

Build quality
Optical quality
Value for money
Overall

Cons: Price (well, you get what you pay for!) Slightly noisy IS. Re-calibration was required, but now focus is perfect.

Pros: Sharpness, overall fantastic IQ. Unique color rendering of fluorite glass. Build quality.

Summary: I bought this lens in 2009 to complement my setup. I am extremely satisfied by the picture quality, in particular the magnificent color rendering is unmatched by any other lens I had the opportunity to use. It is MUCH more portable than any of the 2.8 versions, important if your camera is hanging off your neck on a hike. For low-light applications, I would rather advise to buy any of the 85mm/100mm/135mm primes, as the one stop gain of the 70-200mm f/2.8 will probably not suffice.

Build quality
Optical quality
Value for money
Overall

Cons: price, sometimes struggles to achieve sharp performance on 7D (however was awesome on 30D), noisy IS

Pros: build quality, relatively low weight and dimensions for 70-200 tele, very fast USM AF, nice IS - can shoot 1/30-1/40s @200mm hand-held, nice colours and contrast, bokeh is fine as well

Summary: awesome weather-sealed "compact" tele lens with fast AF and perfect IS, insanely sharp on low to medium pixel-density sensors (30D, 40D etc), however not so amazing on 7D (18mpix APS-C), but you can always apply some sharpness in PP

Build quality
Optical quality
Value for money
Overall

Cons: nothing

Pros: Beautiful image quality. Built like a tank.

Summary: Excellent value for the quality.

Build quality
Optical quality
Value for money
Overall

Cons: None. Loud Image Stabilization, I guess.

Pros: Small and light. Affordable for a professional build quality 70-200 zoom. Amazing optical quality. Fast auto-focus with limiter. Weather sealed. Good IS. Comes with a hood since it's an L.

Summary: A very well built standard telephoto zoom that is much more affordable and lighter than the f2.8 offerings, yet maintains their excellent optical quality. Highly recommended. One of the best lenses in Canon's lineup.

Build quality
Optical quality
Value for money
Overall

Cons: none

Pros: very sharp, great bokeh, effective IS

Summary: perfect telephoto when you have light - I augment with 135 and 85 primes in darker situations

Build quality
Optical quality
Value for money
Overall

Cons: Sometimes I wish for f2.8; No tripod ring

Pros: Fast; great IQ; light for a high quality zoom; sharp

Summary: So good that I keep thinking about trading up to the f2.8... and never actually doing it.

Build quality
Optical quality
Value for money
Overall

Cons: Bokeh less than "brother" f/2.8

Pros: Sharp Accurate AF

Summary: Good value for money

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Optical quality
Value for money
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Cons: none

Pros: very sharp and very fast and sharp focus w/ ds mark III and 7D .great handling and contrast.

Summary: one of the best with 135/f2

Build quality
Optical quality
Value for money
Overall

Cons: None

Pros: Sharp, great color, very good bokeh, super fast and accurate AF, excellent image stabilization, good with TC's, compact

Summary: One of the best lenses ever! It's difficult to make this lens act up. Best contrast against backlit subjects of any 70-200 zoom.

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Optical quality
Value for money
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Cons: F4 is not very bright and not very fast for Sports, Bokeh on Crop for Portraits not so useful, on a 50D you have to stop down to F5.6 for amazing resolution

Pros: IS !!! 1/20s using 200mm on a 50D handheld! USM, fast and precious focussing, ability of focus override, sharpness in general, size and weight!!!

Summary: if you take photos of NOT fast moving objects and if you don`t need a big bokeh (especially with a crop cam) then you will be happy with it!!!

Build quality
Optical quality
Value for money
Overall

Cons: None (maybe a bit heavy, compared to EF-S lens).

Pros: On 40D a perfect lens; stellar optical results at any settings; build quality very solid; IS very effective and not comsuming too much for me.

Summary: Would always recommend it.

Build quality
Optical quality
Value for money
Overall

Cons: none, (apart maybe from IS power consumption). visible vignetting at f4 (on 5D) but not really an issue.

Pros: lightweight, extremely sharp, accurate af

Summary: a great telephoto lens, but for low light work you'd probably be better off with the 2.8 version. (unless iso 3200 - 6400 is ok for you)