NGC 7009 "Saturn nebula". A  deep sky imaging experiment at very long f/15 focal ratio, morrienz

NGC 7009 "Saturn nebula". A deep sky imaging experiment at very long f/15 focal ratio

NGC 7009 "Saturn nebula". A  deep sky imaging experiment at very long f/15 focal ratio, morrienz

NGC 7009 "Saturn nebula". A deep sky imaging experiment at very long f/15 focal ratio

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Description

I tried an experiment while I have my rig set up for very long focal length planet "lucky" imaging of Jupiter and Saturn. I also tried long exposure imaging a bright, small deep space object with my C11 Edge HD SCT at f/15 with a 1.5 x barlow, so at 4200 mm focal length, and it seems to have worked fine. 13 x 3 minute exposures unguided on NGC 7009, the "Saturn Nebula", a small (40x30 arcsecs) "planetary nebula". 10Micron GM1000 mount, with a 6 arcsecs RMS model that I built with MW4 in this f/15 barlowed configuration (7 second bin 2 exposures for the model build). ZWO ASi294MC Pro camera, IR/UV cut filter. Stacked/processed in Astropixel Processor, Pixinsight, and Photoshop Elements. Imaged two nights ago from my rural backyard in the Bay of Plenty region in New Zealand. I think this f/15 deep space imaging would really only work with a bright object like this planetary nebula. A more zoomed in crop is at this link.

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