j4nu wrote:
I was going to say that maybe you're still in the distance where the Sigma loses a bit of sharpness and somehow the side areas are more affected than the center but if stopping down does not help, that's probably not it.
Sometime ago there was a strange issue with 24-70 DN reported here, which I reproduced on my copy, that @24mm when focusing in dead center some areas in the photo were less sharp than when focused a bit to the left or right: https://www.fredmiranda.com/forum/topic/1620710/21#15325411
I can't really explain that, but maybe you're seeing something similar...
Hi
Not really:
What I see, and what's visible in some images taken up close and with a lot of details in the target, is severe problems with parts of the right side of the images. Focusing on patch six ruins the left side.
I can post 100% crops of the patches if somebody want to evaluate them. But really, the curves from my intense eye balling experience are enough (I think). They also shos lens No. 3 having some sideway tilt somewhere inside it.
Just losing some "sharpness" wide open at short distances is not a big problem for me. Heavy loss of resolution and the added lateral CA and fuzziness is.
Apr 20, 2021 at 03:12 PM
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