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Hi Chris,
Not too bad for a first foray into Ha imaging.
As for darks here's what I do.
Wait for a nice cold winters day, setup the camera.
Cool it to the temperature you plan to use. I use -15C almost all the time as there is not much point going colder as the noise reduction is probably not worth the effort of new darks, even then with this method the darks become scaleable.
Take a series of darks at the maximum time you expect to take lights, I haven't yet used 30 minutes, but may in some of the NB stuff I'm into ATM, so mine are 30 minutes. I took a series of 10, which is probably overkill. Now take a series of bias frames.
Go to CCDStack (if you gave it, most other image processing software should have this function anyway), go to calibrate and create master dark and master bias frames, I use the sigma combine method for both, but the clip min/max works as well.
Unfortunately you have to do this for all binning states of the CCD, so it can take a couple of days...
After this has all been done the darks are scaleable for use in CCDStack. One set of darks for everything.
Cheers
Stuart
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