Finally got some clearing to get the
RGB data for the
Ha that I got half a month ago for the California nebula. Still the transparency was poor with passing hi-cirrus and the jet stream right overhead, did I say seeing was poor too. Used my 'DeadCat' Vivtar 250mm f4.5 for all shots, so poor seeing not a problem at 3 "/pixel.
Specifics, 250mm f4.5 preset ancient Vivtar telephoto wide open, 12/5min
Ha, 15/2min
RGB thru Zwo ASI1600MC-cool camera, temp-20C, gain 200, offset 50,
OSC used Baader fringe killer filter to cut down on the blue blast from this non-
APO lens. Lens riding on Meade 16 LX200 for guiding and tracking with QHY5L-II guide camera at 2 second rate. Captured and stacked in Nebulosity, final in
PS CS5 with Carboni tools. Posted image cropped and 25% full size.
Clear skies,
Steve