AF fine tune and focus shift for fast lenses

Started Sep 12, 2016 | Discussions thread
snellius Senior Member • Posts: 1,035
Re: Great idea

If you really want to discover the phenomenon focus shift, then you can experiment best with a 50/1.4. Also very good for this is the AF 80-200/2.8D at 200mm. Test at different apertures and compare the results from far to near. Far everything is fine (constant), and nearby there is a huge shift when changing aperture. Since the D70 is the 80-200 (together with two other lenses) listed in the user manual as a potential source of a problem. With the increase of the number of pixels, these problems are now visible to much more lenses. So it's good to be informed and to act accordingly.

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