M81 in Ursa Major

Photo Details:

• Instrument: Orion Mak-Newtonian (1000mm-f/5.25) & 12.5" RC
• Filters: Astrodon
• Exposure: Red-23 x 10 mins, Green-23 x 10 mins, Blue-24 x 10 mins each & Luminance 20 x 10 mins, 480 mins 12.5" RC
• Camera: SBIG STF-8300 & 20Da
• Software: Images Plus, Registar, Photoshop, Star & Noise XTerminator, Maxim DL
• Location: Mountain Ranch, California, El. 2500ft (120d 30' 18" W & 38d 13' 53" N)
• Date: May 2005, February 16 & 17, March 8-10, 2013
• Comments: