Picture of DIY PVC $10 underwater light arm
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.

UPDATE - I just got some great input from a friend - a mix of 1/2 and 3/4 inch pipe may provide a good opportunity to make this set-up collapsible .

Step 1: Parts List

I wanted to make the angle of the light adjustable as much as possible when under water so I used threaded connections where appropriate. I also had to improvise on one part and use a couple of different junctions where you might get lucky and find the right part and eliminate a couple of the adapters. Also make sure all of these parts are Schedule 40 PVC and NOT FOAM CORE (this will eliminate problems at depth)

You will need:

1 - 1.5 inch 1/4 inch course threaded bolt. (I used Aluminum to avoid deterioration)
1 - male threaded plug
2 - 90 degree elbows. 1 end female threaded, 1 end female slip
3 - couplings. 1 end male threaded, 1 end female slip
1 - 45 degree coupling. both ends female slip
1 - coupling. both ends female threaded
1 - end plug. male slip
1 - length of pvc. I used about 3 feet but you will modify to fit your needs.
1 - hose clamp (big enough to go around a good mount point on your light.)

pvc cement
A drill (3/16 inch drill bit)
a rotary tool to cut a slit in the light mount plug

-UPDATE- just a note, keep in mind that PVC is somewhat negatively buoyant... ok, carry on...
genterara4 years ago
Wouldnt it be easier to mount the camera directly on the lamp, ie, step 3 instead of going into the arm goes into camera (on top the lamp, of course)? that way you can handle the whole setup with one hand.
I kept wondering after my last night dive. I'll try it next time.
sbsplover7 years ago
imagineering at its best! i'm impressed! love your innovation! and your model too! (hi jdt!)
thoma004 (author)  sbsplover7 years ago
Thanks! I'm a big fan of my model too :) Excellent smiley snail :)
AzurCat7 years ago
Awesome! Easy and inexpensive...... in a world of expensive SCUBA gear! This is a great way to save a few$$$$$. Thanks!
thoma004 (author)  AzurCat7 years ago
Cheap is good!!! :)
archeosaur7 years ago
Dood, way to go. I really like the new and improved version.
thoma004 (author)  archeosaur7 years ago
Thanks! It seems to throw out a similar light pattern and is far less clunky.
bownbear7 years ago
sbsplover7 years ago
Cool! Looks really Nice! Well Done!!
LinuxH4x0r7 years ago