posted: Oct. 6, 2007 @ 12:36p
Folks, it is a very good starter lens at a very good price - I'm not stating this lens is better over Canons - but, if you are comparing - don't forget it's 2.8 at wide end and 4 at 35mm - Canons f2.8 is $1300+ and Canons f4 is ~$700 and this are the best money can buy (I have both) - now - if you are not in position to spend $2100 for both or S1300+ for f2.8 or $700 for f4 this Sigma 17-35mm f/2.8-4 EX DG IF HSM will give you something in between Canons lenses for under $250 - beware it's a lover quality lens - with less performance to be expected a.k.a softness / all kinds of optical aberration / maybe color - Canons are "L" lenses, so definitely color is an issue here - again, if you want 17mm and f2.8 and pay as little as possible - !?!?!?!
P.S. With lens wide open, you have to know what you are doing - most of negative reviewers due to softness of the lens, I guess, expecting to have all of the image in focus and it's optically impossible. Good luck!