Simmod Four Clamp-On Lens Ring with NATO Rail Receiver Kit & Hard Case

Traditional rod-based accessory mounting systems introduce multiple points of movement between the lens, camera, and mounted accessories.
This system relocates accessory mounting directly onto the lens itself.

The Simmod Four Clamp-On Lens Ring with NATO Rail Receiver Kit is a lens-mounted accessory system designed to attach motors, LiDAR systems, monitors, and lightweight accessories directly to cine lenses using integrated NATO rail interfaces.

Lens-Mounted Accessory System

Each ring clamps directly around the front outer diameter of the lens, creating a fixed mounting surface independent of the camera body or rod system.

This configuration:

• Reduces accessory movement relative to the lens
• Minimizes motor misalignment and gear separation
• Maintains accessory positioning during lens changes
• Reduces dependence on extended rod-based support systems

The system is intended for lightweight cinema, handheld, gimbal, and compact mirrorless configurations.

Kit Configuration

The kit includes:

• Four clamp-on NATO lens rings
• Hard waterproof carrying case with custom foam insert

Each ring is designed for:

• Lenses with 80mm to 85mm front outer diameter
• Repeatable accessory positioning across multiple lenses

The included case is designed to organize and transport complete lens-mounted accessory setups.

NATO Rail Interface

Each ring incorporates an integrated NATO rail receiver system compatible with standard NATO-mounted accessories.

Supported accessory types include:

• Follow focus motors
• LiDAR rangefinders
• Wireless transmitters
• Compact monitors
• Accessory handles and arms

The NATO system allows repeatable mounting alignment and rapid installation/removal of accessories.

Construction

• CNC-machined aluminum construction
• Matte black finish
• Rubber compression insert system
• Knurled tightening knob for manual clamping adjustment

The rubber insert is designed to clamp securely around the lens barrel while reducing direct metal-to-lens contact.

Mechanical Features

Each ring includes:

• Integrated NATO rail receiver
• Anti-twist 1/4"-20 mounting points
• Anti-twist 3/8"-16 mounting points

The threaded interfaces allow additional mounting options including:

• Lens support systems
• Accessory brackets
• Secondary support structures

Mechanical Performance

By mounting motors and accessories directly to the lens:

• Motor wobble is reduced
• Accessory alignment remains fixed relative to the lens
• Compact camera rigs can be configured without long rod systems
• Lens swaps can occur without re-rigging accessories

The system is intended to minimize flex commonly introduced by lightweight rod setups.

System Behavior

• Fully mechanical accessory mounting system
• No electronic integration
• Does not alter optical characteristics or camera functionality

Notes

• Designed for lenses with 80mm to 85mm outer diameter fronts
• Intended for lightweight accessory configurations
• Additional lens support is recommended when using heavier accessories or larger lenses
• Care should be taken not to exceed camera or lens mount load limitations