I've been trying different methods of processing this quite difficult object and this used 5 frames of 300sec, 25 mins in all. I took bias frames and flats but only used the flats, the bias seems to add rather than reduce noise.
I'd usually processed by averaging to retain the colour but tried adding instead and was surprised to find the colour only slightly deminished.
I also used Mike Smith's plug-in rather than Astroart4s built in colour synthesis.
So this is with all colours and lum stacked by addition and the Lum processed in Photoshop after a light DDP step in AA4. The final stacking of colours and lum was done in Astroart.
The telescope was a WO FLT98 without flattener so I had to crop a bit off the M25C's full chip size.
Two galaxies are visible if you enlarge the picture.
1 comments:
Very nice star colours.
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