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  • BBC Sky at Night

    Make a simple dew heater for your camera lens

    Mar 25, 2021 3 minutes

    strophotography and nightscape photography often require long imaging sessions, and with that comes a risk of your lens dewing up. If the temperature of the glass on the front of the camera lens cools to a few degrees below the dew point, then water vapour in the air will begin to condense onto the glass, causing the lens to become misted over. Any subsequent images that are taken through the lens will be useless. People often think this is only

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