Photo 1) On the C8 - Here's my home-made heater "ring" - the red doovie just inside the flange. I run it off a home-made pulse-width modulated controller.
Photo 2) I also put the dew shield on which keeps the slightly warmer air near the face of the corrector plate.
Photo 3) I also have a home-made heater strip (off the same controller) fro my red-dot finder.
Photo 4) Another ring I made for my 12"
Photo 5) My home-made PWM controller
I've never suffered loss of observing time due to dew with these things running.
Last edited by Omaroo; 17-03-2008 at 06:22 PM.
|