The Ultralight AD-its a number of hot (cold) shoes on housings and ports i.e Nexus, Sea and Sea, Olympus, Canon, Sealife, Nauticam, etc. for attachment of a clamp and a spotting light adapter. Thumb screw tightens hotshoe down.
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![[V6360530W000] OM System POL-058 O-Ring for PT-058, PT-059](/web/image/product.template/29780/image_256)