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Why are my dark and bias images not black like a DSLR, there grey and very noisy looking?

I decided to create a library of files last night, I was surprised to see the images not black?




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Also DSLRs tend to do irritating things to the image before recording them even as raw ... like subtracting bias, noise reduction, possibly sharpening. The more recent DSLRs tend to do more in the way of unwanted image mangling, they need to do so in order to be able to advertise ridiculous high pixel counts and ISO ratings ...

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Mmn... No the images on Artemis capture look like a telly when the broadcast is shut down... grey and noisy?

I'll put a file up when I get home.. but it looks like this on the Artemis screen.

Once the Lum is stacked it looks smooth?


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