071 slight issue

ASI's Range of Specialised CMOS camera's

Moderators: Sam, Sean.Wang

Post Reply
Ken82
Posts: 5
Joined: Thu Jan 31, 2019 11:36 pm

071 slight issue

Post by Ken82 » Wed Sep 18, 2019 9:11 am

Just testing out a new 071 camera and I appear to get an odd pattern to the bottom right of the picture . Not sure if this is calibration in pixinsight or what is going on ? Any ideas ? This was calibrated with a master dark and no bias or flat frames yet.

After colour calibration - https://drive.google.com/file/d/1lOXBJG ... sp=sharing

After colour calibration and background extraction -
https://drive.google.com/file/d/1JzYHqk ... sp=sharing
F4F4C496-BD36-4B38-B3E1-483050C043FD.jpeg
Area of issue
F65504B7-9D3C-4CCB-939F-167FD4015953.png
Screen shot after ABE
Thanks for any help
Ken

Katherine.Tsai
Posts: 215
Joined: Fri Dec 07, 2018 10:24 am

Re: 071 slight issue

Post by Katherine.Tsai » Thu Sep 19, 2019 6:17 am

Hi Ken,
Sorry for the problem, it seems like the camera is getting dew.
Can you turn off the cooling and try again?
If it does not appear when the cooling is not turned on, that should be dew.
You can try cool the camera slowly and gradually with 5 degrees decrement.
And you can also redry the camera by following this guide.
https://astronomy-imaging-camera.com/ma ... iccant.pdf

Ken82
Posts: 5
Joined: Thu Jan 31, 2019 11:36 pm

Re: 071 slight issue

Post by Ken82 » Thu Sep 19, 2019 9:10 am

Thanks Katherine,

I did cool gradually in APT but maybe I’m going too low ?? I also had the anti dew heater working.

I’ll have a further look this weekend.

Cheers ken

Katherine.Tsai
Posts: 215
Joined: Fri Dec 07, 2018 10:24 am

Re: 071 slight issue

Post by Katherine.Tsai » Fri Sep 20, 2019 3:25 am

Hi Ken,
I will wait for your info.

Ken82
Posts: 5
Joined: Thu Jan 31, 2019 11:36 pm

Re: 071 slight issue

Post by Ken82 » Thu Sep 26, 2019 1:48 pm

Looks like I have found the issue. At 0c I don’t get the problem so it’s looks like it was dew after all. I’ve also tried at -12 instead of -15 and that appears to show dew on the first 3 images and then disappears. Is that the anti dew heater starting to work ?

Katherine.Tsai
Posts: 215
Joined: Fri Dec 07, 2018 10:24 am

Re: 071 slight issue

Post by Katherine.Tsai » Fri Sep 27, 2019 6:03 am

The anti-dew heater cannot solve this problem, please follow the guide to redry the camera.

Post Reply