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Camera Skate Dolly 7-inch Arm
Extend, angle, and easily lock into place your camera mounting solution with this Camera Skate Dolly Arm from Monoprice.
This adjustable mounting arm features a ball joint at each end and and adjustable center pivot point. The central locking knob locks and loosens all adjustment points, including the rotation of the ball joints. It employs 1/4"x20 thread connections and includes a cold-shoe mount for use with a camera or other shoe-equipped camera mount.
The arm is constructed of aluminum and measures about 6 3/8" from the end of each ball joint mounting screw. It weighs only 7.0 oz and supports up to 44 lbs. This arm is specifically intended for use with the Camera Skate Dolly (PID 10274), but can be used with any 1/4"x20 or cold-shoe mounting options.
Got this to see if tracking shots could be done with very high quality with minimal expense. Simple answer: Heck Yeah!
My testing was done with a Canon 60D body with either the EF-S 15-85mm or various primes. I also tried it with an iPhone 5 which worked great. The heaviest configuration I tried weighed about 3.5 lbs plus the weight of the cart and arm. Weight of the camera didn't seem to make much difference in the stability of the shots although I would recommend leaving any image stabilization on inside the camera if you have it.
I also got the 7" arm which Monoprice sells as an accessory. Given the cheap price of the skate the arm seemed pricy until I got it and realized how it worked. The single clamp on the middle joint tightens not only the joint, but both of the ball heads at either end of the arm. So it's effortless to set even a heavy camera into any position and lock it down with one turn. It also allows counterbalancing the weight of a lens so the skate doesn't fall over which a normal ball head won't do. Get the arm!
Overall, the unit works very well. It allows for shots I could never get and was very inexpensive for it's capability. Well done, Monoprice! Highly Recommended!