kernsm's reviews
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Sigma 10-20mm f/4-5.6 EX DC HSM
9 out of 10 points and recommendedPractically no distortion at 10mm and none at 12mm. No CA and quite sharp!Some vignetting below F/5.6Excellent feel and the focus is crisp and instant. I was amazed how little distortion at 10mm, and disappearing totally at 12mm and up (using a brick wall for the test). The lens is remarkably sharp wide open with even acceptable corners. The corners sharpen further when stopped to f/5.6.
reviewed October 30th, 2005 (purchased for $480)
I'm glad I passed on the 12-24 mm offerings.