I am very interested to see results from a DSLR in this scenario. Greg has extracted some good Ha data too - I am sure a full spectrum or Ha modded DSLR could do. Dark frame subtraction still does wonders without cooling and using results from different nights would also help (dithering?) I so should have had my mod 6d fitted with cooling
Yes, long exposures extending more than 10 min would become an issue when cranking beyond ISO1600. But, still performs pretty good - QE as good as any DSLR with deep wells that rival the best CCDs. SQRT(2) or less for lineal res with bayer, but you shoot all colours at once
It would be very interesting to see how a DSLR would perform vs CCD on that photon gathering monster
My answer would be the advantage with Ha with the CCD. And my cat just caught a cicada - lol. Greg - good work mate - you have some awesome work and look up to you as an astrophotographer. I had a crack at M33 (Triangulum), that made me realize that you just can't do that galaxy stuff without proper gear!
Im guessing the reason is because of the filters, less light, inturn, more processing, streaching ? tho, 5min subs arent long, sorry if awkward question, but just trying to understand further basic principles etc, as 10 x 10min subs with stock dslr can be as smooth in many respects. Id understand if some residual noise left in the darker zones, tho I'm seeing things in the med bright zones as well ?
Dont get me wrong, It is and awesome and inspiring Image mate and I am sure there are reasons unkown to me, re question.
Rgrds ![/QUOTE]