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Details here: Nikon D810 Thermal Noise IssueI got all the paperwork ready, then on a whim did a couple 30 second exposures of the back of the lenscap. I can't see anything other than black, no problems whatsoever. How long of a long exposure is needed to set the white dots?
A night sky is absolutely NOT a valid test for sensor problems at any place on the planet.I would try for about 1 minute. Also try it at night with a solid night sky.
A night sky is absolutely NOT a valid test for sensor problems at any place on the planet.
There are innumerable light sources in the sky below the human vision threshold.
Shooting the inside of the lens cap, with the lens and cap wrapped in heavy black cloth, is valid.
- Leigh
Hi Paul,I am shooting mainly all long exposures, 1 minute to 4 minutes with moonlight illumination for the night sky, so I am working with a black sky,