Conclusion: been wanting a lens that would give me more coverage than my 55-250. been looking at purchasing this lens for some time. just received the lens and took it to the zoo to try out. I am a petite person with small hands and this lens was very heavy for me to carry on a two hour visit to the zoo. I also had problem in adjusting lens in and out due to my small hand size and the large size of the lens. the detail of the photos is outstanding.
Pros: Superior build quality
Cons: very heavy, slow speed in low light, slow auto focus in low light
Summary: Very nice zoom with very big reach, there is no alternative. I have had the 400 F5.6L but saw no better IQ. The IS makes it possible to work without a mono-pod, but you need daylight off-course. Nice zoom for a visit to the zoo for example. I am extra careful for dust, after use I blow the lens clean. I have seen examples of this lens with dust between the lenses, the design of the push and pull could have to do with that. Just be a little more careful, that's all.
Pros: Nice reach, good IQ even on a Fullframe , solid build,IS
Cons: IS shows it's age. I need two hands to control the tightening ring.
Conclusion: I like the clear crisp images you get from the lens.I shoot all sort of photos and I love how clear my photos of eagles come out compared to other lenses.I have no complaints about this lens at all.I would recommend it to any one.
Gets high res photos with excellent focus for nature photography
5 June 2012
Summary: Excellent Lens. I bought it as a gift. I have been with the photographer many times when this lens has been put to the test. She says "amazing lens". Some photos have been published. This lens complements a 2.8 70-210 Canon zoom lens very nicely. The 70-210 is used for indoor sports photography. The 100-400mm lens is used for nature photography where there is a lot of light. Low light conditions require a higher ISO and slower shutter speeds which is acceptable.
Conclusion: Nature photographer. At first seemed to work fine. Began to shoot all out with distance and started to see much ghosting. Sent it back to canon. Everything checked out. Suggested a more quality uv filter. Shot without filter, same problem. Sent back again with camera. Facility was irvine, ca. They suggested sending it to New York corporate. After full review they told me there was an issue with the glass and sent me a brand new lens. Nothing but happy with lens now.
Summary: I own for this lens for more than one year and I say I like this lens so much. I use this for wild life photography and long distance shots. This lens is user friendly and less weight compared to competitors. down side of this lens is little bit noisy and slow auto focusing. main concern for me auto focus will not work when you want to use 1.4x or 2.0x tele converter because of 2 f stops. other than above concerns i dont have any other iussues with the lens.
Conclusion: Canon's EF 100-400mm f/4.5-5.6 is a versatile lens I use with a 7D body, primarily for wildlife shooting, along with capturing standoff candid shots at events and on the street. However, it's VERY conspicuous at 400mm. In a lot of ways this is a 5-star lens, but it tries to do a little too much maybe. I truly wish Canon had made thls their first 200-400, maybe allowing for 4.5 max aperature throughout the zoom range?
Pros: sharp, versatile, good price performance, relatively lightweight 400mm
Cons: limited low light capability, odd bokeh, vignettes on full-frame cameras, not fully weather sealed
Conclusion: I used this lense with my 7D in the Serengeti and Tarangire in October. I shoot high resolution raw usually in Av mode, so the shutter speed floats. Some of photographs were outstanding. I have prints at 16x24, and resolution is fabulous. Some photos, however, were not sharp, and shutter speed was slower than desired. This occurred at f5.6 and poor/low light, so understand this is not a 'fast' lense.