Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

ASI294MC Colour Pro problems

  • Please log in to reply
2 replies to this topic

#1 iandh2010

iandh2010

    Ranger 4

  • -----
  • topic starter
  • Posts: 303
  • Joined: 24 Apr 2005
  • Loc: England

Posted 08 June 2023 - 04:03 AM

Hi Guys,

Sorry if this is off-topic but I could not find a forum dedicated to Astro-Cameras.

 

I have an ASI294MC Colour Pro camera and while attemting to take an image of M57 under come pretty unfavourable low-contrast conditions, moisture vapour and virtually Full Moon, I noticed a strange mottled patch to the right of M57 which I could not explain.

 

Some fellow astronmer mates of mine have suggested it could be moisture freezing out on my sensor chip. Others have suggested thermal stress from cooling to -20C.

 

I have always used this camera with APT which has Cooling and Warming Aids that I always use to gradually change the camera temperature to prevent any stress.

 

Has anyone had a similar experience with this camera. I've been using it for about 4-5 years now and never experienced this before.

 

I was intending to try imaging M57 again last night, first with the camera uncooled and then cooled, but the clouds rolled in just as I was aligning on M57..... doh!

 

Regards

Ian



#2 michael8554

michael8554

    Skylab

  • *****
  • Posts: 4,018
  • Joined: 19 Aug 2020
  • Loc: Wiltshire UK

Posted 08 June 2023 - 04:38 AM

Hi Ian

 

If you don't post a jpeg of the image, we haven't a hope of an accurate diagnosis.......



#3 jdupton

jdupton

    Fly Me to the Moon

  • *****
  • Posts: 5,551
  • Joined: 21 Nov 2010
  • Loc: Central Texas, USA

Posted 08 June 2023 - 02:19 PM

Ian,

 

   If you have been using the camera for 4 to 5 years and this is a recent development, it is likely that the desiccant tablets in the camera sensor chamber are need of replacement or drying out. Over time moisture can leak into the chamber and cause dewing or frosting on the sensor just as your buddy indicated.

 

   The remedy is to either dry out the tablets or purchase replacements from ZWO. Drying is a relatively simple procedure and ZWO has a PDF document that describes it is detail.

 

https://astronomy-imaging-camera.com/manuals/How_to_clean_ASI_camera_and_redry_the_desiccant.pdf

... or ...

https://astronomy-imaging-camera.com/product/desiccant-tablets-cooled-cameras/

 

 

John


Edited by jdupton, 08 June 2023 - 02:19 PM.



CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics