I was able to get out for a short time tonight. Having a few issues I'm trying to resolve, but overall I solved a few problems and answered a few questions.
- I performed a more dialed in alignment with the guide scope.
- I re-balanced the scope.
- I tried to identify an anomaly with misshapen stars. It's still undetermined, but at least I know it's not flexure or drift.
- I imaged using dithering to try and enhance the smoothness of the background.
- I try to figure out the blue/green color problem from the other night
I shot a handful of objects while testing various things. M3 was actually worth posting so it's below as well as a screenshot.
UPDATE: The images of the in and out focus - mostly concentrating on the ripple in the diffraction rings, turns out to be heat current running up the tube. This is annoying to me because I'm not used to having to deal with heat current as a hindrance. I'm still considering going back to a medium sized (say, 100mm) refractor for imaging. I've still not fogured out the star bump, but it's likely collimation - which I'm not used to really dealing with that either.
Scope: Vixen R200SS 200mm @ f/4 w/Baader MPCC
Mount: Orion Sirius EQ-G with GoTo
Guiding: Meade DSI Pro and PHD Guiding
Guide Scope: William Optics ZenithStar 66 SD
Camera: Canon EOS 20D (unmodified)
Special Settings: None
Exposure: 60 minutes - (20 x 180s)
Processing Software: Acquired in Nebulosity, Stacked in Deep Sky Stacker, Levels and Curves in Photoshop
See Gallery below for image