Update May 2017: I've contacted Sony twice about the issue, I have sent them this video. They said, they look at it. I have never heard back from them.
In some of my recent time lapse sequences from La Palma I have discovered a strange issue with RAW files from a Sony A7S and a Sony A7RII camera.
From one shot to another there are sudden vignetting changes or magenta shifts in the shadows. The pictures were taken only a few seconds apart with the exact same settings (shutter, ISO, aperture, WB).
The vignetting change only happened with Sony Batis 85mm 1.8 and Sony-Zeiss 55mm 1.8 lenses. The magenta shift also happens with manual lenses (Samyang 24mm 1.4).
I have checked the original files with three different RAW converters (Lightroom, Capture One and DXO), but they all show the same problem.
I don't know the cause and I cannot reproduce it. I have other sequences without the problem.
I can only assume that both issues are linked to the internal processing of RAW files in the Sony cameras. It is known that Sony applies some corrections to the data (e.g. lens correction data) before the RAW file is written to the card.
Sony has not replied yet to my complaint filed a few weeks ago. I have contacted Zeiss Germany as well. They said, they will look into the issue and may discuss it with Sony people.
The fact that it happened with two different camera bodies and various lenses makes me very cautious to use Sony gear for critical time lapse projects for the moment.
If you have similiar issues with your files let me know in the comments or message me.
On my blog page I will post news about the issue: niggli.com/blog/
If you want to look at some of the RAW files for yourself send me a direct message with your email address.
Remark: Because in some browsers (or players) blacks are crushed and gamma is different to my edit environment (Mac, FCPX, QuickTime), this clip has a gamma setting of 1.25 to make sure you see whats going in in those shadows.