Sigma 50-500 APO DG OS

Started Oct 21, 2011 | Discussions thread
Contributing MemberPosts: 734
Re: Sigma 50-500 APO DG OS
In reply to Peterrw, Oct 21, 2011

K5 seems to have front focussed. Sharpest part of the image is the top-right of the outer disc of the sign, which looks to be the closest part. The sign seems to be oblique to the focal plane.

I wonder if the reflective material of the sign confused the focussing mechanism?

As to the exposure, I know from experience that the K5 tries very hard to protect highlights. I nearly always open up my shots by at least a stop once I get the RAWs into Aperture. Edit: K10 seems to do this even more.


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