Linear potentiometer-based focus control slider for Steadicam rigs

Gear

ZephyrCan I fly my Alexa or RED on a Zephyr?389

Master SeriesIs a used Master Series rig worth buying as a first big rig?191

BFDHow do I power my BFD receiver from my camera or sled?186

VoltCan I retrofit a Volt onto my existing sled or gimbal?168

ArtemisHow do I power my camera and accessories from an Artemis sled?166

MDRWhere can I mount my Preston MDR on my rig?143

ModulusIs there a Modulus option for HD wireless video?141

G-70Will my G-70 fit my vest, gimbal or sled?126

FI+ZCan I control iris and zoom wirelessly, not just focus?60

HU3Where can I get my HU3 repaired, refurbished or repainted?60

CineLiveHow do I pack and case my CineLive rig for transport?54

G-70XHow does the G-70X compare to Pro Titan, Xarm and other arms?46

Trinity 2Is Trinity 2 SUP 3.0 firmware safe to install or buggy?46

Ultra VestWhich vest should I choose for my body size, comfort and operator type?39

2011Follow Focus forum

15 years old. Gear and prices may have changed since.

A focus slider using a linear potentiometer instead of a rotary potentiometer allows operators to see their focus position more clearly and mark focus distances directly on the slider surface.
The slider can connect directly to camera lens optics or operate through a servo motor via a six-pin HIROSE connector.
When using digital Canon lenses, a cable adapter is required to convert to analog input signals for the optics.
Zoom control is mounted separately on the side of the gimbal handle, operated independently from focus.
The linear slider design enables one-handed operation with thumb controlling focus while the forefinger manages zoom.

The design was primarily tested on Steadicam Ultra 2 rigs.
Compatibility with various lens types beyond what was discussed remains unclear.
No performance data, response times, or operational limitations are provided.
The discussion does not confirm whether the solution works with all servo motor configurations.