What's the best Filming settings to use while scuba diving. And do you need a specific housing or is the one it came with fine.
What depth is the case rated for. My guess is that you don't ant to go down more than 15 feet at the most.
As for how to shoot. The main problem (other then the case failing at depth) is going to be light. There are two things (1) there s less of it at depth and (2) is is very much RED filtered. White balance is nearly impossible to get right unless you use a filter. They do make some nice underwater color correction filters and you can duct tape them over the lens.
If you keep to the very shallow depth you fix the light and color problem.
Soak the entire rig in fresh water every time you come up. Just drop the camera and filter in a bucket of fresh water NEVER let seawater air dry or you will never get the salt off.
The other solution is lights. A dive light is not wide enough you need one made for phototogrphy. I've seen converters that are just a lens that goes over the light to make the beam really wide. But you need a BIG light
The other thing to "get close" then get closer. DOn't try to shoot subjects that are to far way to fill the frame.
The big thing is the case. What is it rated for.
I've used little conn point and shoot inside a case even at 60feet at night
I don't know your dive experience but before you try photography make sure bouncy control is nearly perfect and you can move up down back and forward with hands stuffed into the BC straps
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I agree that the GoPro will need as much light as possible to look the best, so don't use a filter on-camera... fix the color balance in post instead. Even a GoPro Hero3 Black looks like garbage without enough light, and it gets dark underwater.
Can you do that? Is there enough ability in post to correct the extreme red filter effect. I guess it depends on the depth. Above maybe 30 feet the red filter effect in not so bad.
What happens with not filter is that the camera exposes and some color channels clip. Once you have clipping there is nothing you can do in post.