(meteorobs) Heat required to prevent dew in a box for allskycamera

[Ed Majden]

Nuts, my all-sky camera is busy just counting rain drops.  I need to move! 
;-)
Ed

----- Original Message ----- 
From: "bob alongi" <bob71741 at yahoo.com>
To: "Meteor science and meteor observing" <meteorobs at meteorobs.org>
Sent: Monday, November 03, 2014 2:43 PM
Subject: Re: (meteorobs) Heat required to prevent dew in a box for 
allskycamera


Depending on where you live, just the heat from the camera and ancillary 
equipment should be enough to prevent dew formation. Chris Peterson, from 
Colorado, which to my recollection gets pretty cold at times, does just that 
"...a fan at the base of the enclosure that circulates waste heat from the 
camera and its power supply up into the protective dome to help prevent dew 
and frost from accumulating."
web site: http://www.cloudbait.com/projects/allskycamera.html


--------------------------------------------
On Mon, 11/3/14, rmbehr at istar.ca <rmbehr at istar.ca> wrote:

 Subject: (meteorobs) Heat required to prevent dew in a box for allsky 
camera
 To: meteorobs at meteorobs.org
 Date: Monday, November 3, 2014, 11:00 AM

 Koen, I'm interested in the heating
 method you use in the box for the
 allsky camera to prevent dew. During summer I often
 put my camera
 (old Canon Rebel XT with wide angle lens) on a tripod and
 set it
 outside for a couple of hours hoping to catch meteors, and
 have been
 successful a few times. I live in Ontario, Canada, so
 the summer
 season is short. I have made a small box with a window
 that can mount
 onto a tripod, that has worked well. I was thinking of
 building some
 kind of box with some kind of heat that will prevent the dew
 from
 steaming up the window and keep the camera above
 freezing. I'm not
 knowledgeable when it comes to electronics, I was thinking
 along the
 lines of building the box big enough for a small heating
 pad, and have
 the camera on a shelf above the pad. How much heat is
 usually
 necessary?

 Any thoughts anyone?

 Rose-Marie Burke

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