IPC-HDW2231R-ZS and Rings in the image at night

trumee

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Hello,

I get rings in the night on my IPC-HDW2231R-ZS. Initially, i thought it was due to a spider but that wasnt the case. During daytime the image is quite clear. Any idea what could be the issue?

1606147064056.png
 

sebastiantombs

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That looks like IR reflections on something on the lens to me. Have you cleaned the lens recently?
 
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