Quote:
Originally Posted by miketoll
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I see that I've commented on the lens in that link... I used a Sigma 500 f4.5 on my Canon for ~3 years and loved it. It is an excellent lens, sharp wide open, fast focusing, great IQ - for the money it's unbeatable. However I recently upgraded to a Canon 500 f4 IS and am glad that I did. The Canon seems to edge out the Sigma in all respects - it's a bit faster, a bit sharper and there is just something special about the images out of the big Canon primes. I have no experience of the Nikon so cannot comment on that but do know that I am already finding the IS to be very useful. The percentage fo shots that are pin sharp out of the 500 f4 is amazing. If you have the cash for a Canon/Nikon prime it's probably not worth going for the Sigma, you'll end up upgrading in time.