Quote:
Originally Posted by blink138
slawomir i do understand the better dynamic range actually, it just seems to take a lot longer to collect the same information than a dslr, so, actually seems less sensitive?
pat
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I doubt it, but you would need to compare pixel sizes in your cameras as well as their quantum efficiencies.The way I understand it, and please correct me if I am wrong, with a dslr you can adjust gain by setting different ISO - it does not physically improve sensitivity of the chip, but amplifies (multiplies) already collected signal. So the image from a dslr appears brighter;DSLRs are designed to produce a ready for viewing image. However, the higher the ISO the lower the dynamic range. I think you can also adjust gain in your astro camera, but there would be an optimal gain value when you can take advantage of full dynamic range of your CCD.
EDIT: Have you tried using NASA's FITS Liberator on your images?