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 Post subject: ASI178MC Image Corners
 Post Posted: Sun Nov 12, 2017 12:32 pm 
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Joined: Sun Nov 12, 2017 12:18 pm
Posts: 2
Hi all,

anyone having such an effect like me? The corners of all my images are very overexposed, even if i take darks. Attached you can see an image (5 mins) showing the problem. It was taken in complete dark, camera sensor covered. What is going on in the corners? Is there something i can do about it?

The problem results in images being not so nice, as an example see the following image of M33 and look at the lower right corner:

http://astrob.in/320625/0/

Thanks in advance,
Michael (please excuse my english for being not so good)


Attachments:
Capture_0001.jpg
Capture_0001.jpg [ 889.93 KiB | Viewed 96 times ]
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 Post Posted: Tue Nov 14, 2017 7:54 am 
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Joined: Thu Feb 09, 2017 4:58 am
Posts: 84
Hi Michael,
It should be the amplifier glow.
It is very common for image sensors. You can eliminate its impact on light by shooting a dark field.
Thanks
chad

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 Post Posted: Tue Nov 14, 2017 12:29 pm 
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Joined: Sun Nov 12, 2017 12:18 pm
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Hi Chad,

thanks for the keyword "amplifier glow". After reading through several posts found via google i feel informed about that matter. I will try to add more darks to my lights.

You can consider this topic as solved.

Thank you very much,
Michael


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