i made a camera cooler exactly like here http://ghonis2.ho8.com/rebelmod450d16c.html
and my temp readings last night were as follows Ambient temp at night 89 f. Camera box temperature at end of one hour is 39 f !! this is spite of my lousy insulation around the camera nose piece. Im only worried that the filter in front should not fog. whilie using on refractor i can probably use a anti dew belt , but i dont know when i use on newtonian. Any advice or ideas would be appreciated.
cooled 500 d modified.
note i guess when camera is working the temp would go up by 5 degrees