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I took a drive out to a dark site with the DSLR and Star Adventurer. The first image was taken a couple of weeks ago. I didn't think I would get M78 in the frame. Then I realised I could so had another try at it. Both images are the same sub length and the same amount of subs. There seems to be a lot more detail in the first image. The camera setting are exactly the same on both images and the weather conditions where about the same. I wonder why I'm getting more dusty detail in one and not the other? Thanks for looking.

Samyang 135mm, Canon 60Da, Star Adventurer

10x5mins

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Cheers! I alway use ISO 800. It seems to give the best signal to noise ratio at this sub length.

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Interesting. I assume the 2 stacks were processed identically.

I can't provide an explanation myself, but will follow with interest.

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Both processed the same. DBE, Masked stretch, Backgroundneutralisation, Colour calibration. HDRtransfomation, Localhistogram, unsharpmask. A play in curves (saturation & contrast) and bit of noise reduction to finish. 

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