Group Challenge: M31 - Andromeda Galaxy (N); NGC 253 - Sculptor Galaxy (S)  
M 31 - Andromeda Galaxy

M 31 - Andromeda Galaxy(chuck kimball)

Acquisition Date : September 17th, 18th, and 19th, 2009
Camera : Canon 350d, Hap Modified
Camera Settings : iso 1600, RAW, 690 total minutes
Telescope : Explore Scientific ED 80 apo triplet f/6
Mount : LX 200 classic 12 inch at f/3.3 for guider
Adapter / Prime / Afocal / Other : prime focus, Astro-tech AT2FF field flattener
Processing Package / Processing Applied : Acquired, calibrated, stacked, and color balanced in Nebulosity 2.1.8, final curve adjustment and stacking of 3 exposures in Photoshop CS3.
Web Site : chucks astro site
NOTES : three separate sets of subs were used: 60 at 5 minutes, 60 at 1 minute, and 33 at 10 minutes to keep the dynamic range. Subs were stacked separately in Nebulosity and then combined with SMI in photoshop.

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