M81 - Large Spiral Galaxy in Ursa Major

Photo Details:

• Instrument: Optical Guidance Systems 12.5" - f/9 Ritchey-Chretien
• Filters: Clear Glass to keep dust from falling on the film.
• Exposure: 180 minutes
• Film: Kodak Tech Pan 2415
• Developer: D19, 10 minutes
• Location: Hidden Hill Observatory, California, El. 2500ft (121d 28' 59" W & 37d 24' 05" N)
• Digital Processing Employed: Basic Levels and Curves to stretch contrast to enhance viewing on average monitors.
• Comments: