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Hi,
I recently purchased a 70D and Sigma 17-50 2.8. The focus ring was faulty, extremely sticky, so I sent it back to DWI. I am now considering the Canon 17-40 f4 L series lens. My question is; is the L-quality glass, better build quality, nice focus ring and possibly increased sharpness worth it the 2.2f loss?
Which lense would you go for on a crop body?
