1 of 1 people found the following review helpful
GoPro stayed clear of fog, bigger camera didn't,
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This review is from: FogLess Anti Fog Inserts - for use with Go Pro Cameras (Electronics)
I bought these to use in my Hero 3+ and Powershot S100 on a recent trip to Antigua.
Before leaving the UK I followed the instructions, drying them out in the oven, before sealing them in a small airtight sample container.
First, the GoPro. I used the same 2 inserts for 2 weeks in Antigua, where it was pretty humid, and 30 degrees in the shade. I never once had a fogging issue, despite opening and closing the housing frequently, including when it was still a bit wet. As such I think the inserts worked as intended!
However, I also tried using the inserts in my Powershot S100 with its housing. After about an hour in the water with the camera on, I'd get fogging on the lens, despite 2 inserts being positioned around the lens barrel. I had the same problem using up to 6 fresh inserts in one go. I guess that these bits of card are quite capable of sucking out the moisture in the small airspace in the GoPro Housing, but don't expect them to be up to the job of working on anything with more air trapped inside.