Image 1 of 1
M13 Hercules Cluster (Telescope view).jpg
M13 with 130mm Astro-Physics apo at f/6 with no field flattener (slight camera tilt results in more coma at left of frame), for stack of 6 x 6 minute exposures at ISO 800 with Canon 7D (stock camera, not modified). Auto-guided with SG4. Worked perfectly. Slight rotation around guide star made it impossible for Photoshop to do an auto-align. Had to manually align.
- © Alan Dyer 2010
- Image Size
- 5184x3456 / 2.9MB
- Contained in galleries
- Simulated Naked-Eye and Eyepiece Views