(meteorobs) Dark Subtracts with a typical allsky camera

[Chris Peterson]

Assuming you disable the autogain and use a manual shutter setting, you 
should be able to simply make a stacked dark frame and use it for all 
your shots. You probably won't see much difference due to temperature, 
but if you operate the camera over a wide range, you can make two or 
three master darks- cold, temperate, and hot, for instance.

Chris

*******************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

On 10/4/2012 9:59 PM, Wayne Watson wrote:
> A bit of clarification.  What I'm after is eliminating the need to cover
> the camera.  The camera should be able to close completely when taking
> dark frames.
> On 10/4/2012 6:13 PM, Wayne Watson wrote:
>> I have a Rainbow L163VCS (has an iris) camera with a Sony HB-710EC
>> allsky lens. If I want to do a dark subtract, I cover the lens with dark
>> material, and take say 16 frames, which I then stack. I can do the same
>> for an open dark sky. The purpose is of course to bring out faint stars,
>> which one can use to get a sky mapped with RA/DEC coordinates. Are there
>> modestly priced cameras and software that can do this instead?
>>
>