[stoppingdown]

Fast shutter speed is the main suspect now indeed: slowing the shutter the intensity of the problem seems to diminish, and longer than 1/1000s (more or less) disappears. But the shutter is managed by the camera body, and nothing similar happens with the other fast lenses I have. So, maybe a camera malfunction induced by the lens firmware? Very strange.

I thought also about the correction profile in Capture One. This could be an explanation on why so far nobody reported the problem: the first version of the lens was Fuji, so different firmware etc., and most reviewers basically did a thorough review of that version.

OTOH, Klaus in his review wrote:

This (vignetting) is a rather interesting difference compared to the X-mount version which produced a far lower vignetting in RAW mode. This may relate to the different tone curve in E-mount or a different sensor characteristic.

It would be interesting if Klaus could comment more about what he saw.

But I tried to disable the correction profile in C1 and also opened the photos with RawTherapee. Problem still there.

---

BTW: there are recurring discussions about whether Sony already bakes some corrections in the RAW file (which in theory shouldn't, but...), anyway there are people saying they proved it and others saying the opposite — and I never was able to understand who's right.

---

Also, there are two new tests to see:

https://drive.google.com/file/d/1x7R9mdI...XQB3d/view

Note how the trees are darker at the left, while the sky is darker at the right.


https://drive.google.com/file/d/1CU1AH4w...AMmT0/view

These are shots of the blue sky, defocused, converted in b/w and contrast exaggerated, to make the problem more visible.