John Hayes, Ph.D.
Adjunct Research Professor
College of Optical Sciences
University of Arizona
This space for rent
Celestron C-8 SCT
Gary Honis modified Canon 450D (Baeder Mod)
MonoMods monochrome Canon 450D (Debayered, Baader filter, LPF1 removed)
ONAG On-Axis Guider
Starlight Xpress Lodestar Autoguider
Canon EF 200mm f/2.8L II USM
Olympus Zuiko 50mm f/1.8
Quote:Very nice looking HH, John - surprisingly nice reds for an unmodded camera. Imaging at f/2 sure has its advantages!
Nodalpoint is correct about the image being flipped. You can correct it by flipping (or mirroring) the image horizontally.
Congrats on such a nice image.
Quote:Sure…happy to tell you more. ISO was 800, OAT was probably 26 degrees so thermal noise was low. I took 5 subs at 30 seconds to check position and tracking and then managed to get 13 subs at 60 seconds before the corrector iced up. The last few images probably had a fair amount of fog freezing to the optics before I discovered the problem. That almost certainly caused the big halos around the bright stars. The Hyperstar operates at f/1.9 on the C14 so it gathers light pretty fast. I was also using an IDAS LPS-D1 light pollution filter. Saturation is turned up pretty high which amplifies the color of the halos around the bright stars. Diffraction from the small water/ice drops may have caused some of that color (just a guess.)John
iOptron Versa 108 EDMeade ETX-125ECiOptron CubePRO