Adam Maas escribió:
I've never tried it on a crop, but did on film during my fling with the EOS 3. Soft wide open, not a lot of contrast, gets better when stopped down but never gets great, and that's the general consensus on the lens from everyone I know who has used it other than you. The Sigma is variable but a good copy is a lot better performer than the Canon.
I don't know about the Canon, but I bought a Sigma EX DG 28 mm. 1.8 about two weeks ago. My copy is a very good performer, it focuses fast and accurately, and from f/2.8 is slightly sharper than the FA 28 mm. 2.8 I also have (and the FA is a very good lens). At 1.8 (my cameras and EXIF info say 1.7) and 2.0 is somewhat soft, but perfectly usable, and it is already very good at 2.5 It has excellent bokeh, and it's a sturdy lens, although somewhat bulky and heavy. It balances very well on the K10D though.
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