The Veil Nebula taken with a 105mm focal length Nikkor AI-S lens at approximately f/4 (using step-down/up rings, limiting aperture 26 to 30mm step-up ring) and a ZWO ASI178MM-Cool camera all carried unguided on an A-P Mach1GTO mount. Four hours and twenty-four minutes (88 x 3m) for both H-alpha (red) and OIII (blue) combined to produce a bi-color image with a mix of both Ha and OIII for the green channel.
Image processing in PixInsight and Photoshop CC2017.
Shown here reduced (1600 x 1064 pixels) and compressed to meet the CN posting guidelines.
If I get a chance I want to go back and capture this with a 200mm lens and the ASI183MM camera which should give me about the same field of view but at a higher resolution (and with about 20 mega pixels, rather than the 6 mega pixels that I captured with the ASI178 camera).
Edited by james7ca, 27 September 2018 - 06:10 AM.