No fog for our blog...

(Source: magicseaweed.com)

We have been reading reports that the GoPro waterproof housing can fog up when the air temps inside the case are higher than the outside air (space is really cold so we need to think about that). Any moisture inside the camera housing will condense. If there is enough condensation, it will fog the lens.

Learn about the dew point here: http://geography.about.com/od/physicalgeography/a/dewpoint.htm


Here's a possible solution, found on a camera forum:

"...a 1min blast of dry air-conditioned air either from a car vent or building aircon will fix the issue with a waterproof housing.Hold the open case in front of the vent and the camera (separately) for 1 min, let the air circulate inside the SD slot and battery compartment (open slightly), then assemble and close while still in front of the vent (6'' away). Don't open until filming job is finished and keep in cool place out of the sun till ready to start filming. One other thing, use dry hands, as sweat will vaporize into fog as well.This has worked for me in both HD1 and HD2 cameras under all conditions, it's simple science, based on dew point. Google it. If you're still worried, place some kitchen tissue paper towel squares in the space between the camera and the housing at the side and bottom."

Source: http://www.dvinfo.net/forum/micro-pov-camera-systems/507618-gopro-fogging-issues.html