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How to avoid condensation inside housing in hot humid weather?

Started Nov 21, 2017 | Discussions thread
PHXAZCRAIG
PHXAZCRAIG Forum Pro • Posts: 19,651
Re: How to avoid condensation inside housing in hot humid weather?

I've been on several dives off a liveaboard in Fiji where my camera fogged up toward the end of the dives.   Canon point-n-shoot in acrylic housing.

I figured out it was due to the camera itself warming up through the dive coupled with coming into shallow, warmer water.   Never happened at the beginning.

With my Nauticam DSLR rig, in my usual caribbean location, I set up the camera in my room (A/C), and pump down the vacuum as soon as everything is ready to go.  (Batteries changed, lens/ports changed if needed, images offloaded.)   If that is overnight, fine.  If it is at lunch break, all I can do is swap stuff out for the afternoon dives, pump it down and go eat.   At least I get a bit of time to watch the leak detector detecting.

To control humidity, I normally only need to worry about the external glass bits, and that goes away once I hit the water.   For above water shooting, I will put my camera gear out of the A/C 30-60 minutes before needing it to acclimate.   But I've not had an issue doing this procedure.

I've also changed out ports and batteries aboard ship between dives, but in those cases the camera is generally at outdoor temp, or cooler.

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Phoenix Arizona Craig
www.cjcphoto.net
"I miss the days when I was nostalgic."

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