Image At Night Blurry With Dome On, Fine With Dome Off, What Is Wrong?

A member is asking about a Digital Watchdog varifocal dome IR camera - the DW-D3563DIR.

He says, "Camera operates fine with lights on and then the IR cuts in and the image gets blurry. I was going to change the settings on the camera and as I took the cover of the camera the image cleaned up nice and sharp as I put the cover back on the image got blurry again."

It's a cover issue and a night only issue. Any sugggestions?

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** ***** ** **** *** ********* ******** ** *** ****** is ********* ** *****, *** *** **** ****** ** ** longer *********** **** *** ***** ** **** ** *** ******. It ***** **** ** **** *** ****** ** ******** ** the ****** ** ********* ** "****" ** *** ****** ** the **** *****. *** *** ****** *** ***** ***** ** the **** ** **** ** **** ***** ** *** ** a ****?

**** ** **'* ********:

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****** **** ******:

"* **** **** **** **** *** **** *** * *** try *** ****** *****, **** **** * ************ *** ****** gimbals ** ** *** ******** ******** *** ******* *** **** and *** ****** **** ** ***. ******** ***** *** * marginal ***********, *** ******* *** ***** ****** *** ******."