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Ray and Leon
Looks like noise ( dark current ) as the stretched image had heavy horizontal banding
The only other time I experienced heavy banding this was when I captured the Rosette Nebula last year in summer with 5 minute subs
I didn’t take darks , just used some in my library which is not an accurate temperature match
So at this stage we will put it down to noise from the low QE of my Canon 600D
Won’t be back at my dark site for a while so can’t test 5 minute subs as I’m in Sydney now
Cheers
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