Great Nebula in Orion

10 January 2021

This is this year's retake of the great nebula in Orion. This time I (or the ASIair) screwed up. Originally I wanted to take as many 2min exposures at ISO 200 as possible but after refocussing my lens after the first shots something, I don't know what, went wrong and I ended up with the most pictures taken at ISO 1600.

Naturally, the core was totally saturated and to salvage the image I tried something I meant to try for a long time: an HDR-merge of two different exposures. The image above is the result.

Details
f
3.5
t (frame)
117sec
stacked frames
11 (@ISO200) + 39 (@ISO1600)
t (total)
21min 27sec (@ISO200) + 1h 16min 3sec (@ISO1600)
ISO
200 + 1600
camera
Nikon D7500
lens
Tamron SP 70-200mm F/2.8 Di VC USD G2
astrometry