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Sigma 10-20mm F4-5.6 EX DC HSM

Review Date: Jan 27, 2006 Recommend? yes | Price paid: $380.00 | Rating: 10 

Pros: Great range, sharpness and price
sporadic quality control

Purchased the lens a few months ago. First copy had decentering issue that a few others have mentioned (soft on the right 1/3 of frame) worse at 20mm than at 10mm.

Sent to sigma service and replacement copy just fine. I'd
encourage anyone with decentering to get it repaired/replaced. I don't have canon L glass, but sharpness is comparable to 100 macro in center with just slight softening at corners. Nice quick and quiete autofocus.