David Chu: f/6.3 sucks, on Nikon the recommended aperture for ...

┏ David Chu (Pro): Pentax. I'd get the two lens deal. 24 minutes ago from Web ┗ David Chu (Pro): f/6.3 sucks, on Nikon the recommended aperture for precise AF is f/5.6 and anthing slower might not work as well. ...

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