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5 of 5 people found the following review helpful:
3.0 out of 5 stars User experience with Sigma 500/4.5 EX HSM, May 12, 2001
By 
Chris van Rooyen (Randburg South Africa) - See all my reviews
This review is from: Sigma 500mm f/4.5 EX HSM APO Telephoto Lens for Canon SLR Cameras (Electronics)
I am a wildlife photographer in South Africa and I briefly owned both the Nikon and Canon versions of this lens. I used the lens on a Nikon F100 body and found that it did not autofocus properly, due to presumably software conflict between the lens and the body. I swopped it for the Canon version, but it had the same problem when used with the EOS 3. The Nikon version did not autofocus with the Sigma 1.4 and 2.0 APO extenders. The Canon version did focus with the Sigma 1.4 extender, but not with the 2.0. THe lens has exceptionally good optics, and resolution, contrast and colour saturation is excellent. The build-quality is not bad, but not up to the same standard as the equivalent Canon lens. The large tripod mount is very handy, and the lens is very well balanced when used on a tripod. THe lens is very well priced, but unless Sigma ensures that it functions perfectly with the latest top end Canon and Nikon SLR's, it will not be an option for pro's or serious amateurs.
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