Water marks on sensor of ASI1600mm-c ?

halli

Please see attached image.

stretched Ha flat 1.jpg

it is a Ha flat which has been stretched. It has some strange marks which look a bit like water droplets. I left the camera for several weeks after taking this but find the marks are sill there now. I can also see these marks by looking at the camera and they appear to be on the sensor and not the protect window !

I presume they are stains left by water condensation ?

I was going to use Baader wonder fluid and some Q tips to get rid of them - is this advised ?

Do I need to unscrew the camera top - there are 4 allen type screws securing it ?

How do I stop this happening again ? I have a dessiccant node which I just screw on the side of the camera body ?

Any advice welcome - thanks in anticipation.

Ian

katherine.tsai

Hi Ian,

Please take a picture of the sensor glass to show us the water mark.

And can you send this to support(at)zwoptical.com?

They will help you on this.

Thank you in advance.