I've been investigating the best way to manage a scooter, light, deco bottle, and camera for some time now. I've found a few solutions that work, but there are others I'm sure (maybe Boyd will chime in here too).
The easiest solution is to put the cam on the scooter nose with a swivel and quick disconnect -- I've used this setup most extensively, but there are drawbacks...
1) it's slow as hell. Imagine tripling your drag or more just because of the camera
2) re-weighting of scooter required, and if your cam is big enough, a negative scooter.
3) even the fastest quick disconnects take time, and so you either sacrifice your shooting angle or sacrifice time to remove the cam from the scoot (this boils down to the profile and depth)
4) Did I mention it's like turning a Ferrari into a Mac truck?
The second solution is to sling your camera like a stage bottle. This is my least favored method, though I know others who do this exclusively
1) I don't want an extraneous piece of dive gear to get in the way of my life support deco gas, potentially unseating an o-ring, snagging a hose and causing a leak, or getting in the way of my buddies verifying my deco gas
2) your camera WILL get banged around with a bottle next to it, so you have to be UBER careful with dome ports
3) it still slows you down a little bit
The final method I've tried is to attach a leash to the crotch ring and swing the cam around on the right to behind my tanks and resting on the back of my legs. For scootering this works well, but for kicking this is a PITA.
1) Potential for hose/light cord snaggage if you're not careful
2) you can't see your cam, only feel it -- potential for leaks or snags on items in the water
3) if you stop suddenly, your cam can slide into the tanks -- bad news
In the end, it comes down to priorities. I have and will continue to use these methods depending on the circumstances, but I'm always open to ideas.
Oh and BTW -- yes my scooter is red
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