DxOMark investigates lenses for the Nikon D7100: Digital Photography Review

http://www.photozone.de/nikon--nikkor-aps-c-lens-tests/836-sigmaex5015028dcos 2 upvotes By leschnyhan (4 months ago) I bought the new Sigma 50-150, used it for a few months and then sold it. Focus was so far off on my copy that it couldn't be corrected I

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