Thu Aug 16, 2018 1:52 am
I would wait 10-15min, then do a black calibration, with lens cap on the camera, no lens, to reduce any chance of a light leak from the lens, and do this at 400, 800 and 1600, since the camera does not apply any real gain, this should not change the results for a black, no light sensor check.
That said, I had a Nikon V1whch had nice blacks displayed when the lens was caped, but the V3 gave me a very noisy looking screen in the EVF, like you are getting. But when properly exposed, both csmeras had a similar image, no noise. So doing a lens cap test does not always really show much, except a stuck pixel.
You would be better served shooting a dark color wall, with a color checker included in the frame, properly expose, as a Rick suggests, and then compare the results.
Cheers
Denny Smith
SHA Productions