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Tilta

Tilta Gear 0.5 Mod Gear for Nucleus-M Motor

Expand your Nucleus-M motor's lens compatibility to 0.5 mod gears with a purpose-built ABS drive gear that delivers smooth, vibration-free focus pulls on set.

$39.74*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Tilta 0.5 MOD drive gear is a purpose-built accessory that converts the Nucleus-M FIZ motor's output shaft to engage 0.5 module lens gear rings — the finer-pitch gear standard found on adapted DSLR and mirrorless photo lenses as opposed to the 0.8 MOD standard used by dedicated cinema lenses. For a filmmaker running a Nucleus-M rig, the drive gear is the contact point between the motor and the lens: its tooth geometry must match the lens's gear ring precisely to achieve consistent, backlash-free focus pulls. The 10mm width provides a stable engagement footprint, and the ABS plastic construction is the industry-standard choice for drive gears — deliberately softer than lens gear ring materials so that mechanical wear occurs on the inexpensive, replaceable drive gear rather than the lens.

This gear is the enabling component for focus pullers and camera operators who want to use the Nucleus-M motor with adapted glass for narrative, documentary, or commercial work. Adapted photo lenses — Canon EF, Nikon F, vintage Leica, Contax Zeiss — often come with 0.5 MOD follow focus rings, and without a matching drive gear, the Nucleus-M cannot engage them cleanly. The swap is designed to be tool-free and fast, supporting the reality of production days where the shooting schedule demands quick lens changes. For any Nucleus-M operator building out a versatile focus-pulling kit across mixed cinema and photo glass, maintaining both a 0.5 MOD and 0.8 MOD drive gear in the kit is the practical standard approach.

Key Features

ACHIEVE PRECISE FOCUS - The Tilta 0.5 Mod Gear ensures accurate and repeatable focus adjustments, enhancing your control over depth of field for professional-looking shots.

ENJOY EXCEPTIONAL DURABILITY - Constructed from robust ABS plastic, this gear is built to withstand rigorous use, providing long-lasting reliability in demanding shooting environments.

EXPERIENCE SMOOTH OPERATION - Designed for seamless integration with the Nucleus-M FIZ motor, this gear delivers fluid and consistent focus pulls, minimizing unwanted vibrations.

ENSURE EASY MOUNTING - The 10mm width allows for effortless attachment to compatible lenses and focus systems, saving valuable time during setup and adjustments on set.

GUARANTEE COMPATIBILITY - Specifically designed for the Nucleus-M FIZ Motor, this 0.5 MOD gear ensures perfect synchronization and optimal performance for your focusing needs.

Specifications

Compatibility
Tilta Nucleus-M FIZ Motor
Gear Standard
0.5 MOD
Gear Width
10mm (0.39")
Material
ABS Plastic

Pros & Cons

👍 Pros

  • 0.5 MOD specification opens the Nucleus-M motor to a wide range of adapted photo lenses with fine-pitch gear rings, expanding the usable glass inventory for a Nucleus-M-equipped rig.
  • ABS plastic construction is softer than lens gear ring materials, meaning wear concentrates on the replaceable drive gear rather than permanently damaging the lens's gear surface.
  • 10mm gear width provides sufficient tooth engagement surface for consistent, slip-free drive during focus pulls without adding unnecessary mass to the motor assembly.
  • Tool-free gear swap design on the Nucleus-M allows quick drive gear changes between lenses with different MOD specifications without interrupting a shooting day.
  • Designed specifically for Nucleus-M synchronization geometry, ensuring accurate, repeatable focus position feedback without the backlash that mismatched gears introduce.

👎 Cons

  • Compatibility is locked to the Nucleus-M FIZ motor — this gear provides no benefit if you're running a different FIZ system, even another Tilta motor with a different shaft spec.
  • ABS plastic, while appropriate for normal use, is vulnerable to impact damage on a busy set — dropping the motor onto a hard surface can crack or deform the gear teeth, requiring replacement before the next shot.
  • The 0.5 MOD spec covers photo lenses but excludes cinema lenses, which predominantly use 0.8 MOD gear rings — a separate 0.8 MOD drive gear is needed for cinema glass on the same motor.
  • No backlash adjustment is available on this fixed gear — if the lens gear ring engagement distance is imprecise, minor backlash is the result, which is visible in racked focus moves on close-focus subjects.
  • Single-unit packaging means on-set spares require proactive purchasing; there is no multi-pack option indicated for productions that may need backup gears across multiple rigs.

Frequently Asked Questions

This gear is designed specifically for the Tilta Nucleus-M FIZ motor. The mounting interface and tooth geometry are matched to the Nucleus-M's drive shaft. It is not guaranteed to fit Nucleus-Nano or third-party FIZ motors, whose shaft diameters and retention mechanisms differ from the Nucleus-M platform.
MOD (module) is the gear tooth size standard — 0.5 MOD is a finer pitch than the 0.8 MOD gears common on cinema lenses. Smaller pitch gears are typically found on DSLR-style photo lenses adapted for video use. Check your lens's existing follow focus gear ring or the manufacturer's specification; if your lens has no built-in gear ring, you'll need a lens gear ring at the correct MOD to pair with this drive gear.
The 10mm width is the drive gear's own profile — it does not directly determine lens compatibility. Compatibility depends on the MOD spec (0.5) matching your lens's gear ring, and the Nucleus-M motor's clamp fitting the rod rail position relative to the lens. Confirm the motor bracket's rod offset positions the gear at the correct radial engagement depth with your lens ring.
ABS plastic is the standard material for drive gears in this category — it provides adequate durability for normal production use and is specifically chosen to be softer than the lens's brass or aluminum gear ring, so wear occurs on the replaceable drive gear rather than the lens. Under normal operating conditions (focus pulls, not impact loads), ABS drive gears last across full production days and multiple shoots before showing wear.
The gear slides or clips onto the Nucleus-M motor's drive shaft — Tilta's motor attachment mechanism is tool-free for gear swaps, which is essential for fast lens changes on set. No special tools are required. The drive gear replacement is designed to be a quick on-set operation.

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