ASTRO: Question for John Gretchen

I have a friend using the CCD Labs Q453 camera from near Houston. I
think that is about identical to your camera except yours uses dry
nitrogen to fill the CCD chamber while his uses dry Xenon. Each
supplier thinks his gas better of course.

From what I read neither camera has temperature control of the cooling.
The dark current of the chip is such matching temperature of darks to
lights isn't all that important removing the need for controlled
temperature cooling. But with his humidity turning down cooling would
be a good feature it appears.

He's having a real problem with dew on the window on all but the
"driest" nights. He says the humidity on a "dry" night is pretty severe
so dry is a very relative word. I'd think you, being almost on the
ocean, would have a similar problem but you don't seem to. How do you
avoid this?

Rick