Timelapse in high Humidity

Yesterday I had the perfect conditions for a nighttimelapse. no Moon, and clear sky. a very rare opportunity where I live.

Setting up Timelapse with my camera and go! I thought..

There was 95% humidity and of course my camera lens was badly effected by this humidity and the lens-glass completely condensed. Results badly..

Therefor my question is, how do you prepare for long timelapse nightsky with high humidity?

How to protect the camera?

thanks for sharing your thoughts!

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