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Also my astro buddy friend who has experience with qhy cameras says that with the 16 bit depth of the 600 I need to keep my gain at 60 and my offset at 76 all the time...and too that I need to use 3 second Flats, and that I need Bias frames but I don't need them for the qhy178...he also said I needed 20 Flat and 50 Bias regardless of whatever Light frames I take...and the Darks need to be 1.5x the total number of Light subs. However by some different people off of cloudynights.com a northern hemisphere astro imaging forum said that the qhy600 needs Flat-Darks and no Bias and sometimes you can go a shorter exposure for Flats like down to .5 of less seconds...I know my astro buddy friend who i listed at the beginning of this also said i needed to use transluscent acrylic (white) to make my Spike-A Flat dimmer...I even had to resort to opaque acrylic as the rasa is optically so Fast and also I was tempted to remove my camera each time and take custom length Darks to match back at my 'Darker' home about 4 miles away from my observatory (ps: got a 2nd observatory now it's in northern Indiana with worse light pollution) but I figure I need to stick by a 5 second-interval-rule for Darks and make them match the Light exposure lengths to my available Darks, length...So I don't have to keep removing my camera, right? I do have light pollution of about Bortle 3.7 here inside Bremen Indiana where my mom and I live but out 4 miles from town where my observatory is, the Bortle is about 3.4 so a little darker. But still needs light pollution and/or narrowband filters. ps: I used an L-pro filter like I said...and ps: if I were trying to image Dark Nebulae, shouldn't I maybe 'crank my gain-up a little bit?' though I know that I have to match the gain in the calibration frames and the buddy friend said gain of 60 does it for everything...I realize the gain is a like iso on a dslr and the amplifier setting...so effects photons that turn into electrons ratio but I don't know if it messes with certain kinds of noise or not and the total signal to noise ratio if nothing else was changed. Also what is the maximum Great job a RASA scope can accomplish (from the longest total Integration time?) Thanks. David
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