- Altair Astro 66ED refractor, Altair 183C V2 camera, AVX mount, Planostar 0.8x flattener/reducer.
- Capture software SharpCap v3.2 beta.
- Focus with Bahtinov Mask, unguided.
- Bias frame checked with FITS Liberator to ensure balanced histogram, used to decide black level setting.
- Light frame checked with FITS Liberator to ensure Image Statistics min > 0 and max < 65535.
- Stack produced using Siril plus colour calibration, SCNR & colour saturation.
- Stack finalised with GIMP 2.10. About 1 hour for calibration and processing.
Orion 100x15s, 25 darks, 50 flats, 50 bias.
All images gain=400, black level = 50.
Images and SharpCap capture settings below.
Dave