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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.
Modern underwater video lights are now relatively small, have run times of 45–60 minutes and output 600-8000 lumens. These LED lights are powered by Lithium-ion batteries and usually have a 5600K (daylight) color temperature. [17]
Video lights tend to be mounted similarly to flash. The intense light may disturb light sensitive animals, and they may react by retreating from the source. A large proportion of digital cameras have high definition video function, and video lights provide the option of switching between still and video using the same equipment.
Underwater camera, strobe (flash), video lights and housing - for underwater photography or underwater videography; Diving reel, dive spool or line holder to store and transport a distance line or line for a surface marker buoy.
when at anchor, in addition to the lights or shapes prescribed in sub-paragraphs 1 and 2, the light, lights or shape prescribed in Rule 30. A vessel engaged in dredging or underwater operations , when restricted in her ability to manoeuvre, shall exhibit the lights and shapes prescribed in sub-paragraphs (1, 2 and 3 above) of this Rule and ...
Snell's window (also called Snell's circle [1] or optical man-hole [2]) is a phenomenon by which an underwater viewer sees everything above the surface through a cone of light of width of about 96 degrees. [3] This phenomenon is caused by refraction of light entering water, and is governed by Snell's Law. [4]
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