First narrowband image
First HDR combined image
First time, I'm imaging M42:
I overlayed 5 min and 2 min exposures with HDR Efex Pro to get the details in the bright center, but also the faint details in the outer layers.
It's clear, that I still have to get better at focusing though and processing though ...
The 2 min and 5 min stacked images are much sharper:
It seems as if combining them brought up a lot of details, but it also reduced the sharpness.