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I know of a guy who does videos of my local area and posts to youtube. He mentions using "Snake River Prototyping GR Filter" or a "Magenta filter"
I'm sure he's on the forums somewhere and may reply.
https://www.youtube.com/watch?v=B12Fr5maRBM
https://www.youtube.com/watch?v=S1UVWbv7Rbw
Those two videos are hands down the BEST cold water lake videos I have ever seen. Excellent presentation of subject matter thought the eye and the lens. Wow.....sign me up for these dives. And I have never seen Panfish before...very cool!!!! The bass and sunfish are so plentiful and not shy at all..makes me wonder how remote the lake was or if a rebreather was used. Don't tell....its part of the fantasy dive!
Backscatter :: Underwater video :: compact video :: parts & accessories :: filters
I use the one from Backscatter here in New England (with their flip system) with decent results.....almost always with light(s). The main advantage to the flip system is you can switch easily between the filter and a macro lens without having to carry extra pieces (or in warm water to flip between shallower and deeper filters)
Backscatter :: Underwater video :: compact video :: parts & accessories :: filters
I use the one from Backscatter here in New England (with their flip system) with decent results.....almost always with light(s). The main advantage to the flip system is you can switch easily between the filter and a macro lens without having to carry extra pieces (or in warm water to flip between shallower and deeper filters)