Question about fog

Started Dec 17, 2012 | Discussions thread
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Michael W00d
Michael W00d Contributing Member • Posts: 834
Re: Question about fog

If the mirror fogs, condensation will have formed on other parts as well. I had thought fogging was no more than a temporary inconvenience. However I was surprised to see this recent thread that indicates it can have a potentially calamitous effect:

http://forums.dpreview.com/forums/thread/3350284#forum-post-50450780

The lesson is that when entering a warm area, such as a building, after the camera has been exposed to low temperatures, place the camera in a sealed bag and leave it there until its temperature has equalised with the surroundings. It also applies if the camera is taken from a cool air-conditioned area into warm, humid conditions. It also seems that the same problem can occur outdoors in exceptional circumstances.

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