The Flame and Horsehead Nebulas in
here for full sized image)
Takahashi FSQ-106N f/5 4-element fluorite refractor
II German Equatorial Mount
Barbara Instrument Group ST-8E NABG CCD camera (1530 x 1020 pixels, 9 x 9mm, monochromatic, 16 bit, 13.8 x 9.2mm array)
color filter wheel with IR-blocking red, green and blue dichroic filters
Saturday, November 25, 2000
Joshua Tree National Park, CA
Approx. 3500', OAT +37F.
exposure time: 100 minutes. (12x5 minutes red, 4x5 min. green, and 4x5 min
Stacking: Red luminance behind RGB tricolor image.
Dark and flat cal, mean (not median) combining and DDP (on luminance) with
MaxIm. LRGB stacking, final level adjustment,
color balance, blooming repairs/reconstruction, crop and security with