
M 31
Acquisition:
- Camera: Nikon D80 (unmodified, CCD sensor)
- Lens: Tair-3A 300mm f/4.5 (shot at f/5.6)
- Lights: 1027 x 2s (34 min total) at ISO 3200
- Calibration: 100 Bias, 50 Darks, 50 Flats
- Mount: Fixed tripod (no tracking)
- Sky: Bortle 7
Processing (Siril):
- Preprocessed with OSC_Preprocessing script
- Photometric Color Calibration
- Background Extraction
- Green Noise Removal
- Histogram Stretching