Taken last week over two nights of partly clear skies using an ASI178MM-Cool camera and a Kenko 200mm telephoto lens. Two hours and twenty-one minutes of integration time (71 x 2m) with a Baader 7nm H-alpha filter. On the camera, lowest read noise gain setting and temperature set point of -15C.
I usually post over in the CCD and CMOS forum but since these subs were taken with a $100 camera lens on a Celestron AVX mount (mostly, about one third were taken on a night when I was using a Mach1GTO) I thought it would be interesting to post here to show what can be done with fairly modest equipment (I'm talking about the Kenko lens, the AVX, and the ASI178MM camera, not the Mach1GTO ).
Interestingly, the AVX was not even polar aligned, but I did use a guide scope. I was also working under red-zone light pollution with a target that was fairly low into the light dome of my home town.
Image processing done with PixInsight and Photoshop CC2019 (okay, that's not really "modest," but certainly commonly used). Full disclosure, I also added a few minutes of subs that were taken with an exposure time of 30 seconds (to help with the core of the nebula).
Edited by james7ca, 15 June 2019 - 05:13 AM.