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The main barrier a DSLR user has to overcome in my opinion is the lack of colour in stars and that is one main area CCD images tend to win.
I am not sure if that is from the well depth of the sensor pixels or if it
has something to do with the 14 bit versus 16 bit.
There are examples of DSLR images with colourful stars but not very often.
Perhaps also many DSLRs are used in a suburban environment and they tend to show up light pollution more easily than a CCD exactly why I am not sure but perhaps because the gain used on the sensor (ISO) is way pumped up compared to a CCD which is usually a fixed gain set by the camera manufacturer.
Perhaps an ideal DSLR image is the main image taken with lots of subexposures then a series a shorter ones only for the stars so they don't oversaturate into all white.
Then layer in the stars separately using Photoshop star separation techniques.
Anyone want to test the theory?
Greg.
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