Simmod SIMTray 4 x 5.65" Adapter for 95mm Filter

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Round filters and matte box filter systems are built around different physical formats.
This adapter bridges those two standards.

The Simmod SIMTray 4 x 5.65 Adapter for 95mm Filters is a precision-machined tray system designed to allow a standard 95mm threaded circular filter to be used inside a 4 x 5.65 matte box workflow.

Function

The SIMTray converts threaded circular filters into a matte box-compatible format by mounting the filter inside a rigid 4 x 5.65 tray structure.

This allows users to integrate:

• Circular diffusion filters
• Circular polarizers
• Variable ND filters
• IR cut filters
• Diopters

into cinema matte box systems without requiring dedicated rectangular filter versions.

Filter Compatibility

• Designed for:
  • Standard 95mm threaded filters
• Compatible with:
  • Circular screw-in filters
  • Fixed ND filters
  • Diffusion filters
  • Circular polarizers
  • Diopters

The filter threads directly into the center opening of the tray.

Matte Box Compatibility

• Designed for standard:
  • 4 x 5.65 matte box systems
• Compatible with:
  • Side-loading matte boxes
  • Rotating filter stages
  • Cinema matte box workflows

The tray maintains the external dimensions of a standard 4 x 5.65 filter for consistent insertion and positioning.

Construction

• CNC-machined anodized aluminum construction
• Rounded tray corners for matte box compatibility
• Matte black finish to reduce reflections and stray light
• Approximately 4mm tray thickness

The structure is designed to maintain rigidity while minimizing additional weight within the matte box.

Mechanical Performance

• Converts circular filters into tray-mounted configuration
• Maintains fixed filter positioning relative to the optical axis
• Allows threaded filters to rotate when required, depending on matte box clearance and filter type
• Provides repeatable installation and removal within matte box systems

The tray system is particularly useful for integrating circular filters that are not commonly available in cinema tray formats.

System Behavior

• Fully passive mechanical adapter system
• No electronic components
• Does not alter the optical behavior of the installed filter

The final optical result depends entirely on the characteristics of the mounted circular filter.

Use Case Characteristics

The SIMTray is intended for workflows involving:

• Hybrid photo/cinema filter kits
• Lightweight matte box configurations
• Use of specialty circular filters inside cinema rigs
• Consolidation of threaded and matte box filter systems

Notes

• Requires compatible 95mm threaded filters
• Matte box clearance may vary depending on filter thickness
• Rotating filters such as polarizers and variable NDs may require accessible matte box stages for adjustment