M42 – 20200116

It’s a bit rough around the edges, but that is because I didn’t crop it – that would have meant losing some other bits where there is interesting detail. The rotation of the image frame is due to the light frames having been taken on an Alt-Az mount, with short image duration to avoid issues with field rotation – however the frames when stacked clearly reveal the rotation, and requires brutal cropping. This was constructed from about the best 30% of 150 10s frames taken as OSC on a Nikon D500, 8″ ACF 2032mm f/10 SCT. Software: APP, PS.