Vignetting in A7II

[Neroon]

So here is my experience.

I now have two A7II. One is going to be converted to IR. I will get an a7000 as a back up when it comes out.
Both cameras show vignetting in the upper right corner the is much more obvious than the other corners.

I have been testing like crazy looking at my manual lenses and the 24-70mm I got.

Methodology and Results:

I shot a brick wall that gets even direct sunlight.
I set on Shutter Priority.
I set on Auto ISO.
I used the Sony/Zeiss 24-70mm f4

First set of images the variable was shutter speed.
I set the lens at 50mm
I then proceeded to take images starting at 1/8000 of a second and worked down to 1/2000.

Second set the variable was Focal Length.
I set at 1/8000th for all four shots.
I took images at 70mm, 50mm, 35mm, and 24mm.

Results:
First set I found that the vignetting goes away once you get down to around 1/3000 or 1/2500

Second set I found that it was there but much more noticable at 70mm. I notice it really bad when shooting with my Olympus 100mm f2.

I went back and did a set at different apertures. I found minor mitigation by stopping down. 

I get it with both of my cameras.

I am going to test using other lenses, but the fact that it happens with two of my primary lenses is disturbing. Yes this could be a lens issue, but it could also be an issue with the shutter.

The following images in order 1/8000, 1/5000, 1/3000th.

The images were opened in Adobe Camera RAW. I applied the lens correction for the equipment used which cleared up most of the issue but still left some behind. The problem is really bad with images shot with older MF lenses.

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[Neroon]

Here are three images taken with an Olympus 100mm f2 as plain Jpgs.

There are no corrections applied other than what Sony does in camera.

 

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[Neroon]

The solution is pretty simple -- turn off EFCS...