Sigma APO 50-150 2.8 Problem
I just received this lens to use on my D7100 for sports and was looking forward to the range it offered. Read the instructions, mounted it on my camera and tried to take a shot. No go!! The camera will not AF and therefore could not compress the button to focus or take a photo. I did find out if I put both the camera and lens on manual, turn the focus ring then I can take a photo and it seems very sharp. Not sure if I got a defective lens or I'm doing something wrong.
Any advice appreciated or should I just send it back for refund or replacement?
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