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A Nikonos V amphibious camera Underwater housing for SLR with dome port, arms and lights. Some cameras are made for use underwater, including modern waterproof digital cameras. The first amphibious camera was the Calypso, reintroduced as the Nikonos in 1963. The Nikonos range was designed specifically for use underwater.
Previously the size of the video camera was also a limiting factor, necessitating large housings to enclose the separate camera and record deck. This results in a larger volume which creates extra buoyancy requiring a corresponding use of heavy weight to keep the housing underwater (about 64 lbs. per cubic foot of displacement or 1.03 kilogram ...
The underwater environment usually requires a diver to wear thermal, sting and abrasion protection. In cold water, a diving suit such as a dry suit (at temperatures of 0-10 °C), [3] a wet suit (at temperatures of 21-25 °C), [4] or a Hot water suit (surface supplied diving only) is necessary. [5]
Baited cameras are highly effective at attracting scavengers and subsequent predators, [1] and are a non-invasive method of generating relative abundance indices for a number of marine species. [ 2 ] As a non-extractive technique, it offers a low environmental impact way of understanding changes in fish numbers and diversity over time.
Underwater video is an scuba-based underwater sport governed by CMAS where teams of competitors using digital underwater video systems all dive at the same saltwater ocean sites at the same time over a two-day period. The submitted digital video are then assessed and ranked by a jury. [22] [23]
They are generally not important for dive safety, but are required for the video camera to get an acceptable image quality, either for video recording, or for the surface team to monitor the work done by the diver. Modern underwater video lights are now relatively small, have run times of 45–60 minutes and output 600–8000 lumens.