Quote:
Originally Posted by strongmanmike
I want a camera that is read noise limited and with such low read noise you need great cooling (preferrably without the need for water) to take advantage of it 
Mike |
There are several nice analysis on this camera made by Richard Crisp in his website. In reality there is another limiting factor called RBI on this large chips that could limit the exposure. That depends on temperature too. With about -30C and subframes of 10 minutes the camera is indeed limited by the (little) read noise, that's why I am using this standard subexposure as upper limit. Sometime I use lower subframes if *very* bright stars are in the field to recover a little more color information on stars core for the final processing.
If you want to use the camera with longer subexposures than you need to cool much more to have the image read noise limited.
Clear Skies
Marco