What the thread found

• A Bartech follow focus with M-One motor functioned reliably during a cold-weather shoot at 12 degrees when an Arri FIZ unit failed to power up
• A Bartech BFD system maintained signal transmission across a very large indoor venue where rental Arri and loaned Seitz follow focus systems lost signal
• The Bartech manufacturer identified and resolved a temperature-sensitive voltage regulator component that caused failures below freezing temperature

Depends on

• The cold-weather failure was attributed to 12-degree conditions but the underlying cause was not fully identified in that case
• The large venue test involved a single model mentioned only as a stage setup without full technical specifications
• These are anecdotal reports from users rather than controlled testing data

Gear in this thread

FI+Z, BFD

Parts

Follow Focus

Same gear or parts

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2. 2026Pulling focus and zoom yourself while operating, especially on live showsOperator practice
3. 2025History of wireless focus and lens control systems for Steadicam®: from cable-based Cinema Products and Seitz to Preston digital, and European solutions by Chrosziel, cmotion, and ARRI.FacebookSteadicam operators group
4. 2025LC-1 (Lens Control-1) follow focus system: wired architecture, motors, and early operational experience (1990s).FacebookThe Steadicam Group