gonzostar Posted June 15, 2017 Share Posted June 15, 2017 Hi M94 Galaxy taken over a couple of nights. 145mins, worth of 5 mins light frames. Using the ES 102mm APO refractor on a AVX mount No darks, but with flats and bias calibration frames Used Canon 450d camera (um-mod) with CLS filter. Stacked with DSS and processed in PS Thanks for looking, feedback gratefully received Cheers Dean Link to comment Share on other sites More sharing options...
wimvb Posted June 17, 2017 Share Posted June 17, 2017 Looks good, Dean. But it's a small target, isn't it? Link to comment Share on other sites More sharing options...
gonzostar Posted June 17, 2017 Author Share Posted June 17, 2017 i was just chuffed that i was getting 5min subs with v. little trailing Link to comment Share on other sites More sharing options...
wimvb Posted June 18, 2017 Share Posted June 18, 2017 Yes, guiding worked well. In the corners you have elongated stars. But the direction of the longer axis suggest a flat field issue. Do you have a flattener with your scope? The large camera sensor reveals any off axis optical blemishes of the scope. If you want perfect stars all the way to the corners, you'll need a field flattener, and get it at the correct distance between optics and sensor. Personally, I think I would just crop my images somewhat. With a dslr sensor, there is usually room to spare. Link to comment Share on other sites More sharing options...
gonzostar Posted June 19, 2017 Author Share Posted June 19, 2017 No flattner with the scope! I think cropping is the way at the moment. Eventually want to upgrade camera havent decided which way to go yet. OSC or another DSLR. Although admiring peoples images they tend to be mono camera's with filters. Because of LP in my areas to want to squander the the money with equipment i can use occasionally Also the other factor is practicing all this processing in PS. Dean Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.