Buoyancy arms have robust O-Rings inserted into the balls. This is an innovation that allows the photographer to adjust the arms underwater in smooth, fluid motions. The ease with which adjustments can be made in arm positioning is a colossal advantage.
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Leoben underwater ball joint clamp for 1 inch ball arms can joint together 2 ball mounts with 1 diameter . the manufacturer who focus on designing and manufacturing underwater arms & and trays in China . wholesale underwater photo and video equipment in China
if you’ve taken some underwater photos before, you might want to skip this section. Here’s where I cover the basic photography tips, if you are starting out with a point and shoot.