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Occasional spot blur

Started Feb 5, 2022 | Discussions thread
Atsel
OP Atsel Regular Member • Posts: 265
Re: Occasional spot blur
1

Comparing three images side-by-side, I would say another hypothesis, that it is extreme case of field curvature. Sharp parts on these images are slightly different.

f/5.6 image is focused perfectly in center, sides are softer;

f/5 and f/8 images are misfocused (AF was single & central point), though sides are sharper.

Infinity focus is always challenging on a portrait lens even @f/8!

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