http://www.metacafe.com/watch/76309/...amera_housing/
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Very quick and easy, but does it really work? Who is going to be the 1st here to attempt this one?
If your worried about implosions just stick a tubeless car tyre valve in the end of it and pump it to just below your desired depths pressure.
Matt
Now that sounds like an interesting idea, I wonder how the cam would handle the air pressure in there?