Please Peter, could you tell me a couple of things I'd like to know?
Do you use any kind of filter?. What circumstances? depth?. Mounted where and how?
Do you white balance?, does it work fine at any depth?.
What housing are you using?, How is the buoyancy?
Thanks
I don't use any filter on the lens or port.
If I am trying to balance the ambient light with the video lights, I use a blue, green or blue-green filter on the video lights.
I have preset 4 colour balance settings into the GH4 by doing a MWB in sunlight from 4 A4-size pieces of coloured paper which I printed from PhotoShop.
1. light blue for shallow tropical water
2. darker blue for deeper tropical water
3. light blue-green for shallow greenish water
4. darker blue-green for deeper, greener greenish water
Then I step between AWB, these 4 settings and a kelvin setting of 6500K (for shallow sunlight water).
Nauticam NA-GH4 housing. Slightly negative buoyancy. When shooting WA with the dome port I use a Styx float collar around the port to help balance. When shooting Macro, I use a Gorillapod Focus tripod.
Regards
Peter