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cmotion

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Wireless SteadyZoom Rig


*** UPDATE - Power issues fixed! ***


Hi All,


Been working on a wireless alternative for zoom control for cMotion users and have cobbled together this.



I realise it's not the prettiest, but it being modular is important for me and it functions well. It powers from a single NPF battery via the plate which ups the voltage from 7v to 12v.


This build can be mounted to an 18mm pan bar, but also be able to stripped down for when wireless is not needed to act as a wired zoom control - even mounted to a set of handheld moosebars / handgrips.


I've order a few F330 slimline NPFs and will report back on how long it powers it for.


Update: with smaller F330 batteries:



The components are:


cMotion SteadyZoom

Elokuvakonepaja Housing

Ratworks Ratgrip

cMotion Camin

L-Cube Bracket (with 1/4" screw)

7P Cam to LBUS Cable

Arma Cine NPF Power Plate (modded so power cable with LBUS is on the opposite side)

Upgrade Innovations Rosette to Arri Loc Pin Adapter

Ratworks Panbar to Rosette Adapter (not pictured)

2x 3/8” to 1/4 20 Thread adapters


Hope this inspires so you make your own :)


Matt Choules GBCT

U.K.

186 Views
Matt Choules GBCT
Matt Choules GBCT
Aug 17, 2023

I made a little video in prep to show three wireless handsets (1x for focus, 1x for iris and 1x for zoom) is possible and does even offer metadata when the lens is mapped properly.


I did have a slight issue with the zoom axis metadata shortly after (it disappeared), also, depending on how you mount your motors the metadata might be reversed in your handset from what you see on the camera. I need more time to get the proper workflow to ensure they match.


Lastly, don't expect focal length readouts on the SteadyZoom.


Otherwise, very functional and very modular.

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