Bagnaj97 Posted January 25, 2017 Share Posted January 25, 2017 Still need to sort the tilt somewhere because there's still some coma/elongated stars on the right hand side. There was a nasty LP gradient on the right as well, which has left some purple stars after removing it. Celestron C6n, AVX, modded 450d guided with 50mm guidescope and gpcam. 35x 300s lights (2hrs 55 mins), 20x flats, 20x bias Link to comment Share on other sites More sharing options...
laudropb Posted January 25, 2017 Share Posted January 25, 2017 I am no expert but I think it is a very nice image. Link to comment Share on other sites More sharing options...
Ibbo! Posted January 25, 2017 Share Posted January 25, 2017 Nicely done - looks like galaxy season is here. Link to comment Share on other sites More sharing options...
Bruce Leeroy Posted January 26, 2017 Share Posted January 26, 2017 Great detail on the galaxies when you zoom in. Well done. Link to comment Share on other sites More sharing options...
Stu1976j Posted January 26, 2017 Share Posted January 26, 2017 Fantastic image you must be very pleased with that Link to comment Share on other sites More sharing options...
niallk Posted January 26, 2017 Share Posted January 26, 2017 Link to comment Share on other sites More sharing options...
Grimbles Posted January 26, 2017 Share Posted January 26, 2017 Hi Very nice image. With regard to your 'coma/elongated stars ' I had exactly the same problem which, after many hours of searching I tracked down to be the tiniest amount of play in the T-mount adapter on my EOS450d, it is also worth checking that the camera is fully seated and 'square' in the focuser, which was another of my problems. Regards Link to comment Share on other sites More sharing options...
DaveS Posted January 26, 2017 Share Posted January 26, 2017 Very good image, and early in the "galaxy season" too. Oh dear, I'll have to get that reducer for my 130 triplet, ouch . Link to comment Share on other sites More sharing options...
Bagnaj97 Posted January 26, 2017 Author Share Posted January 26, 2017 4 hours ago, Grimbles said: Hi Very nice image. With regard to your 'coma/elongated stars ' I had exactly the same problem which, after many hours of searching I tracked down to be the tiniest amount of play in the T-mount adapter on my EOS450d, it is also worth checking that the camera is fully seated and 'square' in the focuser, which was another of my problems. Regards There is a tiny bit of rotational play in the EOS adapter, so that could well be the culprit, but I think the problem is more likely the focuser not sitting square on the OTA. I don't want to spend too much time sorting it at the moment because I'm hopefully near the end of DSLR photography - I'm currently saving for a dedicated mono CCD/CMOS (Probably ASI1600mm-c). If that exhibits the same tilt problem then I'll try and fix it. I've recently bought a ZWO 8 slot EFW and Baader HaLRGB filters in anticipation of a "proper" mono camera, but in the meantime I might experiment with imaging using my Altair gpcam mono guide camera. Galaxy season is approaching and FOV calc tells me that with the gpcam I'll have an image scale of 1.03"/pixel and a fairly tight FoV, ideal for the Whirlpool, Black Eye, Sunflower and Sombrero galaxies and with M101 just about able to fit the frame. With such a small sensor and FoV the pictures should be relatively unaffected by tilt, assuming it's not something DSLR specific. Link to comment Share on other sites More sharing options...
simmo39 Posted January 26, 2017 Share Posted January 26, 2017 V nice! Link to comment Share on other sites More sharing options...
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