On Mon, 18 Apr 2005 15:32:21 -0400, Roland Roberts
wrote:

Hmmm, while a webcam based imager is unlikely to be anywhere close to
optimal, I would have sworn that I heard Ron Wodaski say that the Ex
View HAD chips where designed to almost not need dark frames during
Saturdays' NEAF conference on CCD imaging. I'm wondering if while
scribbling notes I missed some context....

Their dark current is very low, but plenty high enough to require dark
frames for exposures longer than a few seconds at ambient temperatures.
But they can be cooled without regulation and not normally require
darks.

_________________________________________________

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