Deep Sky Astrophotography - Robert Arn
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M31 and Companions

Location: Friend's Creek, IL
Date: 2009-09-16
Camera: Canon XSi (unmodified)
Lens: Canon 200mm f/2.8
Mount: Astrotrac
Shot: 23x120sec; ISO 800 f/2.8
45 dark frames applied
Processing: DeepSkyStacker, Photoshop