+Graham Posted July 27, 2013 Share Posted July 27, 2013 (edited) Decided to try a new target for me tonight, the Pacman Neb. GT81 Atik 314 L 31 subs at 300 seconds 15 Flat Frames 15 Bias Frames Stacked in DSS processed in PS 6 Edited July 27, 2013 by Graham Link to comment Share on other sites More sharing options...
+Ibbo Posted July 27, 2013 Share Posted July 27, 2013 (edited) a cracker Graham stars are nice and round and plenty of nebulosity keep an eye on that focus through the night Steve Edited July 27, 2013 by Ibbo Link to comment Share on other sites More sharing options...
+RonC Posted July 27, 2013 Share Posted July 27, 2013 Cracking shot Graham, one of my favourites! Link to comment Share on other sites More sharing options...
dawson Posted July 27, 2013 Share Posted July 27, 2013 Nice. Very nicely framed too. Great work Graham. Ibbo, does the focus change when imaging the same object but for a long period of time? Link to comment Share on other sites More sharing options...
+Graham Posted July 27, 2013 Author Share Posted July 27, 2013 (edited) a cracker Graham stars are nice and round and plenty of nebulosity keep an eye on that focus through the night Steve Thanks Steve... sound advice will be checking more often from now on. Cracking shot Graham, one of my favourites! Thanks Ron, I can see why its a favorite of yours. I will be coming back to this again. Nice. Very nicely framed too. Great work Graham. Ibbo, does the focus change when imaging the same object but for a long period of time? Thanks Dawson. The focus does change slightly over a long period of time. As the target moves across the sky the amount of atmosphere you are shooting through changes with the angle, the scope will also change very slightly due to expansion and contraction with the air temperature. Edited July 27, 2013 by Graham Link to comment Share on other sites More sharing options...
dawson Posted July 27, 2013 Share Posted July 27, 2013 Ok, that's useful to know. Do people repeatedly use a bhatinov mask to re focus, or is there another trick when you are essentially in the right ball park and just need a micro-adjustment. James Link to comment Share on other sites More sharing options...
+Graham Posted July 27, 2013 Author Share Posted July 27, 2013 I use a bat mask but if any one knows an auto system program I would love to here about it. Link to comment Share on other sites More sharing options...
Sheila Posted July 27, 2013 Share Posted July 27, 2013 focus max if you are very brave ........ and i am not they keep elling me to use it with my set up, but i am too chicken. but i think it requires a moonlight focuser or a feathertouchj like mine, i am sure someone with more knowledge will advise Link to comment Share on other sites More sharing options...
Guest peter shah Posted July 30, 2013 Share Posted July 30, 2013 lovely rendition Link to comment Share on other sites More sharing options...
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