An Orion from February, the first time I managed to properly polar align the sktracker and use the fast wide lens in anger :-)
This is 36 x 5 minutes worth of an ASI294MC shooting through a duo filter and a Sigma Art 35 f/1.4 lens (which I think I had stopped down to f/2)
The Ha and [OIII] were extracted using Siril and these are the HA component by itself and the re-combined channels as HOO and then colour-balanced.
I stretched stars and nebulosity separately, using starnet++ (which as it turns out runs a lot much better on a modern M3 Macbook than an old Intel one;-)
I think I'll have another go when Orion rises again, but rotate the field of view. The rosette is nice, but I'd rather have the large Ha blob north of Orion included.
