Best way to cope with cold is to acclimatise your camera in a bag before you start and if you are still getting condensation just keep giving it a wipe before each shot...re blurring use the timer on the camera so that you don't shake it by depressing the fire button. Also don't worry so much about zooming in on the moon (I'm not sure how much zoom you've got), you can always crop later, focus to infinity manually untill you're sure it looks sharp. Here's one I took a while ago with an old manual 70-200 tokina lens....
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Brilliant, thank you
I had my lens cloth in a bag in my pocket, but completely forgot about it. I saw the frost on the outside of the lens, but didn't check the lens itself until I was inside. Live and learn.I'd read a tip somewhere to use the self-timer as a poor man's shutter release, and I was using that, which definitely made a difference. And I was trying to zoom in too far, you're right there. It's got the equiv. of a 24mm-840mm. Less zoomy-zoom next time.
Here's some other pics of the blood moon. You can spot the professional photographers a mile away, and the non-pros who've 100% saturated:
In pictures: Blood supermoon lights up the skies of Aotearoa
My fave from Mark Gee:
And my sunrise/moonset pic from the following morning:

