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Hi all. I've got a purple cast on the bottom of my sensor in my a7s2. It isn't really noticeable if you use conservative ISO levels (say below 10,000) but at around 12,800 or above I can start to see this purple haze at the bottom of images. So some quick examples, first of a night sky at 12800,16000 and 20000 ISO... http://ulterior-motive.com/shared/a7s2/iso-12800.jpg http://ulterior-motive.com/shared/a7s2/iso-16000.jpg http://ulterior-motive.com/shared/a7s2/iso-20000.jpg And a few ISO's hgiher, 25600 and 40000 ISO http://ulterior-motive.com/shared/a7s2/iso-25600-dog.jpg http://ulterior-motive.com/shared/a7s2/iso-40000-dog.jpg To clarify, this doesn't seem to be light leaks as I've tried back tape. I have the camera on default colour profiles and nothing unstandard configured. Are others seeing this at such ISO levels ? Anyone want to go shoot a shot or two into the night sky to check ?