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'Finished' 9.5hrs of M81 & M82 from this week.


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I posted the result of my 4 hour data the other day, but as the conditions were good last night I figured returning to the same subject wouldn't hurt.

Still got some issues in processing. Flats look like they're overcompensating though I kept the histogram within the recommended range and they appear to correct properly when used on a single raw image in rawtherapee. I'm pretty happy with this over all however.

2117696540_M81-82MK2-flats-huge-sharpened.thumb.jpg.bf63b00202fbd50d5d088a9a97f5c5b1.jpg

 

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28 minutes ago, Leeps said:

You seem to get the same swirly rainbow noise pattern that I get... Any idea what causes it? I thought it was due to my poor flats. This is a lovely job :)

I think my flats were probably wrong somehow. I never seem to get them right but I don't know what I'm doing wrong. I don't get this pattern when I use no calibration frames.

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8 hours ago, pipnina said:

I think my flats were probably wrong somehow. I never seem to get them right but I don't know what I'm doing wrong. I don't get this pattern when I use no calibration frames.

Hmm interesting that we're both on Nikon and both on Reflectors. Are you firmware modded? Not saying it's a problem in your image at all, it's fantastic - but it is a problem in mine! 

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3 minutes ago, Leeps said:

Hmm interesting that we're both on Nikon and both on Reflectors. Are you firmware modded? Not saying it's a problem in your image at all, it's fantastic - but it is a problem in mine! 

My nikon isn't modded at all, and I have gotten this effect with refracting optics too. I have done some imaging with normal camera lenses in the past which showed this. I cannot however say what causes it.

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