What can stop fogging on my camera lens when inside an air conditioned room for an hour?

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  • keerok
    Lv 7
    3 weeks ago

    Acclimatization.

    Bring in the camera and lens to the room in a sealed bag and let it sit in there for 15-30 minutes before taking them out and using.

    It's the same thing when going out from an aircon room to the hot and humid outdoors.

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  • Frank
    Lv 7
    3 weeks ago

    Fogging is a problem for a lot of photographers especially outdoor photographers who come in from a cold/wet environment into a warm dry one.  And when you consider that an air conditioner works, in part, by removing moisture from the air, you can understand why this happens.

    Outdoor Photography magazine has discussed this issue numerous times over the years.  The solution is to place the lens/camera inside a plastic bag.  As the gear warms up, the water condensation will form on the bag and not on the gear.  So just place your lens inside a Ziplock bag before coming and you'll be fine.

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  • qrk
    Lv 7
    3 weeks ago

    Air conditioned room can be heated or cooled. Which is it? In the northern hemisphere buildings are often heated at this time of year.

    Fogging occurs when water vapor condenses on a surface. For this to happen, the dew point of the environment (the room) is higher than the temperature of the lens.

    Fogging is a common issue if your camera equipment is outside on a cool day. The lens will attain the same temperature of the outdoors. Lets say it's 35°F outside. When you come in to a room, lets say 70°F with 40% humidity, the dew point will be 45°F. Since the dew point is higher than 35° (the temperature of your lens), dew will form on the lens element until the lens attains a temperature slightly above 45°F.

    This is a common problem during cold weather. The cure is to place your camera in an air tight bag outside where the dew point is low (it has to be below ambient temperature) and bring the camera in to your abode. Let the camera warm up  for and hour, then remove the camera from the bag.

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  • 3 weeks ago

    You need to put the camera and lens in a ziplock bag before going out from a warm house into the cold and then back into a warm a/c environment.

    It wouldn't hurt to put some silica gel bags (proper ones where the silica can't come out) in your camera bag anyway.

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  • 3 weeks ago

    What's happening - are you saying your lens continuously fogs, it fogs after you've been using it for an hour ... ?

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