I recently bought a new camera for SCUBA diving and I decided to save some money on a lighting rig. I didn't want to pay big bucks to buy a specific arm for my camera and light so I put something together out of PVC. I am using 3/4 inch pvc because that is what I had, but I'm sure 1/2 inch would probably be just as strong and more compact. ImageSpots.get('spot484137').img.alt = 'IMG_0123.jpg '+' '+'underwater, under, water, strobe, arm, light, scuba, camera, rig';
http://www.instructables.com/id/DIY-PVC-10-underwater-light-arm/