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ZWO ASI 183MM Pro Dark

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#1 Newfie Stargazer

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Posted 25 February 2019 - 01:57 PM

Just wondering if anyone else is seeing this as their typical 183MM Pro Dark? This is a 180s master dark.

MasterDark180s

 



#2 einarin

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Posted 25 February 2019 - 02:01 PM

Yes it is typical.

https://www.cloudyni...-qhy-etc/page-5



#3 Newfie Stargazer

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Posted 25 February 2019 - 02:09 PM

Ok, thanks.  First time I saw it I thought it was from a bright star just outside of frame, but then after doing a meridian flip, it stayed on the same side of the frame, so I know that could not be the case.

 

Jim



#4 petert913

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Posted 25 February 2019 - 02:25 PM

Wow.  I had no idea CMOS sensors could have such huge flares inherent in them.  

Lots of darks and calibration frames, I imagine, to get rid of that. 



#5 fewayne

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Posted 25 February 2019 - 10:51 PM

There's a good discussion of this over in the 183 test thread referenced above. Basically Panasonic seems to control this better on the chip, Sony lets its freak flag fly. But yes, it does calibrate out very nicely. If you didn't have a big starburst at the right edge of your dark frame, I'd be worried for you!

 

Note that if you stretch your dark good and hard, you'll be able to find other glows too. Mine has a weak one in the upper left and two more in the lower corners.


Edited by fewayne, 25 February 2019 - 10:52 PM.


#6 Newfie Stargazer

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Posted 26 February 2019 - 07:29 AM

Ya, it does calibrate out...

 

get.jpg?insecure



#7 BobInTexas

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Posted 16 March 2019 - 12:23 PM

Thanks for this.  I just started processing with this camera and thought the street light was getting into my lights.  Then I saw it on my darks, too.  Just tested it in a camera bag in a gear box and it was still there.  I thought my camera was bad.  Thanks again!


Edited by BobInTexas, 16 March 2019 - 12:34 PM.

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