Step 1: Parts Needed
From the photography store:
1) One mounting stud - I bought a Manfrotto dual size (1/4 - 3/8) threaded mounting post.
From the hardware store:
1) One aluminum painter's extension pole with removable screw threading.
2) One 1/4-20 thread 3 1/2" carriage bolt - sized to fit the Manfrotto mounting post.
3) Two washers.
4) One nylon lock nut - to fit carriage bolt.
5) Threaded rod coupling nut - it must be able to fit snugly inside the extension pole and allow the carriage bolt to pass through.
6) Pop rivet
Step 2: Assembly
I began by screwing the nylon lock nut onto the carriage bolt to about an inch from the head. I then threw on the two washers the rod nut and screwed on the mounting post. I then adjusted the locking nut so it tightened up the washers and rod nut against the mounting post. I then removed the mounting post and gave a couple of more turns on the lock nut.
Taking the metal tube insert, I cut off a small section that would fit between the carriage bolt head and the first washer. I took the washers off, inserted the newly cut off piece of tubing onto the bolt, replaced the washer/coupling nut/washer and finally threaded on the mounting post. I tightened the whole thing being careful not to damage the brass mounting post.
The whole assembly goes like this;
Carriage bolt with nut screwed down / cut off insert tube / washer / coupling nut / washer / mounting post.
Step 3: Putting It Together
I inserted the whole thing into the end of the pole. Using a hammer I gently tapped the assembly in until just the edge of the washer was even with the end of the pole. It should fit snugly without doing too much damage to the end of the pole.
I drilled a small hole through the wall of the pole and inner metal tubing and pop riveted the whole thing together. If the rivet is too long you may need to make a small adjustment or get an appropriately side rivet.
Step 4: Ready, Set, Shoot!
My monolights weigh just under five pounds and the poles are more than adequate to hold them up. Another DIY post uses an adjustable painters pole but I felt a five foot boom was more than enough for studio work.
I hope you found this DIY Photographers Boom Arm helpful. I welcome our comments. Good luck and happy shooting.