Or pick up a second hand QHY8 or similar camera, you will get lovely reds, low noise and a cooled CCD, and they go for not much more money than a DSLR + modification costs.
As stated below, an unmodified DSLR is very insensitive to the red H-Alpha light coming from the nebula, so it will only begin to show with much longer durations, but will still be strongly under-represented on an unmodified DSLR.
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