astro
the milky way, a hundred frames at a time.
shot during the new moon, a bit further out from where i live. a hundred frames of the milky way, because one frame on its own is mostly noise.
astrophotography needs four sets of images: lights, darks, flats and bias frames. they get stacked in siril for noise reduction and rejection stacking, then the stack goes through starnet2 to strip the stars out. in photoshop i stretch the histogram, separate the colour channels to pull out the hydrogen-alpha, then layer the stars back on and export. the full psd is around 4gb just for editing.
Process
- 100 lights + darks, flats, bias
- siril: calibrate, register, rejection stack
- starnet2: pull the stars out
- photoshop: stretch, extract h-alpha
- stars back on, export
