I'll be travelling down to the Ross Ice shelf in Antartica next month and the latest temp' forecast is -20 to -25 C.
Last time I went batteries were kept warm inside my clothing, but the major problem was misting of the optics when taking camera out, Nikon D90, worked ok though but battery life was well reduced.
Do any of you guys have any tips to share with me?
Is there a battery pack that I can keep inside my clothing with a trailing lead to plug into the camera?
At Vostok Station previously if I remember correctly, they're using Nikon D3 and Quantum battery packs which are kept inside their "wooly bears" (mid layer clothing)then connected by electrical harness.
Looking for something similar, but it doesn't seem to exist anywhere