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

Camera cooling question

  • Please log in to reply
2 replies to this topic

#1 StarmanDan

StarmanDan

    Skylab

  • *****
  • topic starter
  • Posts: 4129
  • Joined: 27 Aug 2007
  • Loc: Deep in the heart of Texas

Posted 17 February 2017 - 11:21 AM

When a camera spec lists it can cool down to -X below ambient, does this mean it's always running at the delta temperature regardless of what the ambient is, or does it have the ability to operate at a set temperature as long as it doesn't exceed the delta?  For instance, let's say I have a camera with a delta T of -50 degrees.  Ambient is 90 degrees.  Would I be able to tell the camera to operate at 40 degrees and would it stay at 40 even if the ambient temperature drops over the night? 



#2 baron555

baron555

    Surveyor 1

  • *****
  • Posts: 1916
  • Joined: 27 Sep 2010
  • Loc: Lockport, IL

Posted 17 February 2017 - 11:59 AM

Yes, some give you the option to set a specific temperature, others you can only set the differential.



#3 Alex McConahay

Alex McConahay

    Fly Me to the Moon

  • *****
  • Posts: 5536
  • Joined: 11 Aug 2008
  • Loc: Moreno Valley, CA

Posted 17 February 2017 - 12:14 PM

The answer may vary from camera to camera.

 

It depends on whether the temperature is "regulated." A regulated temperature will cool to the temperature specified and then stay there all night with the provision that it cannot cool any cooler than its rating below ambient. We will speak in degrees Celsius, since all the ratings are in Celsius. So, if it is 30 degrees outside, and the camera can cool to 40 degrees below ambient, then the REGULATED camera will cool to -10, and stay there. Of course you can set it to -5, and it will stay there. If the ambient temperature cools to 20 degrees, a REGULATED camera set at -5 will stay at -5. But, if ambient temperature heats up to 45 degrees (That would be weird!!!), then the camera would not be able to stay at -5, and the temperature will rise to +5 even if you have it set to -5.

 

On the other hand, if you have a NON-regulated camera, as many "cooled" DSLR's and other less expensive camera are, the cooler will take it to its rated cooling below ambient. To see what temperature it will deliver, simply subtract the rated cooling ability from the ambient.

 

Most of us try to run our cameras as cool as possible, at a set (regulated) temperature that asks our cooling system to run at about 80%. This allows some a stable temperature even if the ambient rises a little now and then.

 

Alex




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.







Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics