photomom2one wrote in post #9514776
set aperture to 22, ss to 5, ISO was 1600 I think, due to low light, set focus to manual and focused to infinity.
showed the dust and several tiny pricks of different colored lights.
I did more searching and came up with hot pixels due to long exposure and high ISO.
don't show up at faster SS.
is this correct?
Oh yeah. The 1D classic gets purple corners past 5 seconds, and is sometimes worse at higher apertures. It's because you've got dual processors so close to the sensor. Also, if you are seeing red and blue dots, those are hot pixels, and they are usually easy to clean up with noise reduction. They are normal on not-new bodies, and really shouldonly show up at 100%.
Do your dust test shots into a bright blue sky. ISO 100, f22, set focus as close as possible, and over expose by one whole stop. If it doesn't show up there, it never will.
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