Simmod Clamp-On Lens Ring with NATO Rail Receiver

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 NATO Ring with NATO Rail Receiver is a clamp-on lens ring designed to mount accessories such as lens motors, LiDAR systems, monitors, and wireless components directly to the lens barrel using a NATO-based mounting interface.

Lens-Mounted Accessory System

The 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
• Allows accessories to remain aligned during lens changes
• Reduces dependence on extended rod-based support systems

The system is designed primarily for lightweight cinema and mirrorless configurations.

NATO Rail Interface

The ring integrates a standard NATO rail receiver system for mounting compatible accessories.

Supported accessory types include:

• Follow focus motors
• LiDAR rangefinders
• Wireless video transmitters
• Compact monitors
• Handles and accessory arms

Integrated NATO geometry allows repeatable positioning during installation and removal.

Construction

• CNC-machined aluminum construction
• Matte black finish
• Internal 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.

Fitment

• Designed for lenses with:
  • 80mm to 85mm front outer diameter
• Compression-based clamping system accommodates minor dimensional variation

Proper sizing is required for correct fitment and load distribution.

Mechanical Features

• Integrated NATO rail receiver
• 1/4"-20 accessory mounting points
• 3/8"-16 accessory mounting points
• Anti-twist accessory interfaces
• Groove and threaded pattern for LiDAR positioning alignment

The threaded mounting points can also be used with lens support systems when additional support is required.

Mechanical Performance

• Reduces motor wobble during focus operation
• Maintains accessory alignment relative to the lens
• Minimizes flex associated with lightweight rod systems
• Allows rapid lens swaps while retaining accessory positioning

The ring is intended to create a more rigid relationship between the lens and mounted accessories.

System Behavior

• Fully mechanical accessory mounting system
• No electronic integration
• Does not alter lens optics or camera functionality

Notes

• Intended for lightweight accessory configurations
• Proper lens support is recommended when using heavier accessories
• Care should be taken not to exceed mount load limitations of the camera or lens system