Hello Everyone,
I am a beginner. What is the cause for the red line on my images? Any comment would be appreciated.
Frist Photo: M42 AND HORSEHEAD NEBULA
Light frame 58* 60s ISO1000
No Dark, No Bias, No flat
My setup was
Canon 6D (unmodified)
Canon 200mm F2.8 @ F3.5
CLS Filter
With SA
2nd Photo:HORSEHEAD NEBULA
Light frame 94* 40s ISO3200
20 Dark, 20 Bias, 20 flat
My setup was
Canon 6D (unmodified)
Vixen ed81
CLS Filter/
With SA
Both processing is almost the same.
I have no idea what should I do,1. I stacked in DSS 2. I adjusted the colour level with GIMP to remove the blue tint. 3.I imported to SiriL for Autostretch *3...
What can I do to improve my image? Many thanks.
Regards
Terry