knobby Posted October 25, 2015 Share Posted October 25, 2015 Hi, had a crack at M45 last night ... Fullish Moon, a bit misty and a hasty polar align. Managed about 15 x 45 seconds and about 5 x 60 seconds .Should this be enough to show any nebulosity as the results are pretty limp [emoji3] All taken at 400 ISO , Nikon D7100 and William optics Zenithstar 70 on AVX mountLink to stacked DSS TIFF of anyone's bored ...https://drive.google.com/file/d/0B2QNGXiAfO_RaENXcVBrRzZfUHc/view?usp=docslist_api Link to comment Share on other sites More sharing options...
laudropb Posted October 25, 2015 Share Posted October 25, 2015 Sorry can't open your file. Link to comment Share on other sites More sharing options...
Scooot Posted October 25, 2015 Share Posted October 25, 2015 Nor me. Link to comment Share on other sites More sharing options...
knobby Posted October 25, 2015 Author Share Posted October 25, 2015 Might be too big ? Opens on my Mac but the PC won't open it Link to comment Share on other sites More sharing options...
knobby Posted October 25, 2015 Author Share Posted October 25, 2015 https://drive.google.com/file/d/0B2QNGXiAfO_RVnhoXzBJSW5GdEE/view?usp=sharingTry that, a bit cropped so smaller Link to comment Share on other sites More sharing options...
wxsatuser Posted October 26, 2015 Share Posted October 26, 2015 Had a quick run in Pixinsight, someone with a bit more skill may get more out of it.I cropped it a bit.There are some bunnies and ABE did for some of the gradient.I struggled with the colour. Link to comment Share on other sites More sharing options...
ollypenrice Posted October 26, 2015 Share Posted October 26, 2015 This simply isn't a target for moonlit conditions. It would be hard to think of a target worse affected by moonlight since the nebulosity is produced through reflection, so is largely blue - and blue is the colour of the night sky during the moon time for the same reasons that it's blue by day. We may not be able to see it as such but that's the case.Olly Link to comment Share on other sites More sharing options...
knobby Posted October 26, 2015 Author Share Posted October 26, 2015 Thanks guys, lesson learned !Tracking looked good though Link to comment Share on other sites More sharing options...
wimvb Posted October 26, 2015 Share Posted October 26, 2015 I was able to open the original file and had a look at your image. Ihave to agree with Mike:There definitely is nebulosity. If you improve the PA, you should be able to squeeze more exposure time out of it and reduce the noise.But for better images you need to take flats. There is quite some vignetting and dust in your system. Link to comment Share on other sites More sharing options...
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