andyboy1970 Posted November 14, 2013 Share Posted November 14, 2013 T: Skywatcher 150p M: HEQ5 C: Atik16Hr OSC + Baader UHC-S filter This is a combination of 2 x 10 min + 2 x 5 min + 2 x 3 min + 4 x 90sec + 6 x 30 sec + 8 x 5 sec exposures Processed in Neb3 and combined in Ps2 Stars are a bit mishapen but it is the same on every sub from the 10 minute ones to the 30 second ones. Coma? Link to comment Share on other sites More sharing options...
Guest Mr T Posted November 14, 2013 Share Posted November 14, 2013 Nice image Andy. Strange that even 30 sec exposures have misshapen stars, seems worse top left quadrant of image, could be coma. I tend to get equal amount of coma right around the edge on my SW200P. Has the image been cropped at all on the right and bottom? Link to comment Share on other sites More sharing options...
andyboy1970 Posted November 14, 2013 Author Share Posted November 14, 2013 Cheers. It is not cropped at all. The feedback from other forums seems to agree that it is coma. Saving for a refractor at the moment so no coma corrector for me.... Link to comment Share on other sites More sharing options...
Guest Mr T Posted November 14, 2013 Share Posted November 14, 2013 Same here, I'll be going for something between 80mm to 120mm triplet, can't afford a Takahashi, so read lots of reviews for mid range scopes, but got a few more months to decide. Link to comment Share on other sites More sharing options...
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