I finally obtained some flats to reduce and Ha data to combine with the M42 data that I took a couple of weeks ago. The STL11000XM is not very sensitive in the Ha region of the spectrum. Still, it brings out some of the fainter peripheral nebulosity.
AP 155 EDF f/7
4" field flattener
STL11000XM
(HaL)RGB (150,100):40:40:40 min -- all Bin x 1
Astrodon filters
Tom
AP 155 EDF f/7
4" field flattener
STL11000XM
(HaL)RGB (150,100):40:40:40 min -- all Bin x 1
Astrodon filters
Tom
Attached Image:
Starsearch Observatory
Lat 42N 47' 00" Long 112W 10' 47"
Elev 1752m
www.tvdavisastropics.com