At the end of a day's work and if possible when changing magazines the camera housing should be washed off with fresh water. This will help preserve the housing and will also minimize the chance of salt spray damaging the camera mechanism and in particular the lens. When the camera and housing are removed from the water they should be immediately placed in the shade. This is especially true in the tropics where even a minimal exposure to the sirn can cause heat inside the camera housing to damage the film.
All film manufacturers now have faster, finer grained negative emulsions available in 16mm, 35mm and 65mm. Negative stock is preferred for underwater work over reversal films as it has a greater exposure latitude and yields better prints. It also transfers well to tape and is ideal for television production. For direct projection of the original high speed reversal color films are available.
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