dgdg Offline Upload & Sell: Off
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I use a thousand oaks brand dew controller and strap for overnight astro. It works very well paired with a cheap jump start battery and 12v splitter.
I was out for the geminid meteor shower for several hours. Temp was about 29 degrees. Everything I had was frosted over including my coat, sleeping bag, pack. My lens was nice and clear the whole time. Buy a spare strap just in case. One strap died on me, don't know why. I have used it many other times in conditions where people were pulling out hair driers or having to pack up from the dew clouding the front element.
Tried the sock warmer thing a few years back. It barely works for short periods of time when dew is truly an issue. Lots of fiddling around, feeling the packs, replacing then, etc. For cold weather or time lapse it would be frustrating and disappointing IMO.
Astro imagers (the telescope people) actually go to great lengths to keep the sensor as cool as possible to reduce noise. Some have active cooling units. There is no IQ benefit to wrapping the camera body and advise against it unless for other clear reasons. If battery power is an issue, use an external power source.
David
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