I took these pics on the morning of friday 13th, didn't seem to have too much bad luck.
The whole last quarter moon is a mozaic of 16 x 1 minute stacks using a DMK41au02 CCD through a OIII filter. The OIII seemed to give me a almost perfectly still stream.
The others are just single stacks off the CCD.
The Trifid Nebula is a stack of 40 minutes worth of exposures through a LPR/UHC filter since the moon was lighting things up. I took 30 x 2.5 minute exposures of M20 but only, perhaps, 3/4 were usable (and that was tollerating a little bit of drift on some), the rest had drift that was too much... I'm at a loss, if my polar alignment was out too far, surely all 2.5 minute subs would have streaking... Any advise???
I was using the Celestron NexGuide to autoguide attached to a 80mm refractor on the main tube, then imaged Using the Canon 40D at ISO1250. White balance was set to "K" @ 7200 and the color adjustment all the way in the red/magenta corner to counter the bluish tinge given by the Celestron LPR/UHC filter.
Final Result was Dark subtracted, cropped then scaled down to 30%.
Thanks for looking,
Mariusz
PS: I noticed that the mozaic resolution was shrunk on uploading, the original size was 3000x3000.
I love your moon shots Mariusz, particularly the brighter repros. Surprising we don't all spend more time imaging the moon rather than swearing at it. Always seems to be on my "to do" list, but you've nailed it nicely with those!
