Since everyone recently has been talking about Vucuum seals for housing I thought I input on my recent experience with Housing Sentry from Underwater Camera Stuff (http://uwcamerastuff...ry_overview.htm)
I decided to go with the basic setup which has no electronics and uses the manual hand pump. I installed the valve in the Hydrophone port of my Aquatica AD7000 and it took me a couple of minutes to do.
Here are some pics of the layout:
The basic setup like mine retails for $290usd plus shipping.
Have used the setup for the past 3 weeks and think its one of the best things I have bought for my camera housing. Like alot of other I think that every brand of housing should have this setup as a standard part in each new housing.
I found that Bill and Mary from Underwater Camera Stuff get to order from especially for me here in Australia