(a7R-iii) What accuracy to expect from the Autofocus?

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am stram gram
am stram gram Junior Member • Posts: 36
(a7R-iii) What accuracy to expect from the Autofocus?

New to Sony (from Canon) with an a7R-iii coupled with a Samyang 45mm f1.8.

Spent the last days experiencing the various settings.

Something I noticed with that lens, is that the autofocus is working ok, but is not as accurate as manual focus (at 100% view).

Here are 2 cropped samples, the fist is AF, the 2nd is MF.

Settings were identical (f/3.2, 1/500s, ISO 100, ...)
Taken straight front from about 10 meters
(actually took several of those to be sure, and other subjects as well)

AF 100% crop

MF 100% crop

This is from the JPEGs, but the RAWs (taken simultaneously) show, of course, the same difference.

To be frank, I was expecting the AF to perform a bit better than that.

Is there a problem (with the cam or the lens), or is that result "acceptable" for that kind of inexpensive lens?

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Sony a7R III Sony FE 55mm F1.8 +1 more
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