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describes clarity of detail, the perceived combination of resolution and acutance.

2 votes

Sigma 28-105 3.8 5.6 Lens not sharp with Nikon D7000 unless stopped way down?

I used to have this kind of problem. Previously I owned Nikon D5000 and it worked superbly with Sigma 17-50 OS. Later, I used the same lens with a Nikon D7100, and most of the time it was out of focus …
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