Simmod Aria Pearl Filter (4 x 5.65", Grade 1/4)

Diffusion filters alter highlight behavior, contrast response, and perceived texture within an image. The Aria Pearl filter is designed to introduce controlled halation and highlight bloom while maintaining overall image detail.

The Simmod Aria Pearl Filter is a diffusion filter designed for 4 x 5.65 matte box systems, producing a pearlescent glow around highlights while reducing overall image contrast and sharpness in a controlled manner.

Filter Format

• Filter size: 4 x 5.65 inches
• Available strengths:
  • 1/8
  • 1/4
  • 1/2

Designed for compatibility with industry-standard 4 x 5.65 matte box filter trays.

Optical Function

The Aria Pearl filter modifies highlight response and local contrast characteristics.

The filter is designed to:

• Create a soft pearlescent glow around highlights
• Reduce overall image contrast
• Suppress highlight harshness
• Introduce controlled halation while retaining image structure

The effect intensity varies depending on:

• Filter strength
• Lens focal length
• Aperture
• Lighting direction and intensity

Optical Construction

• Constructed from dual-layer Schott optical glass
• Precision-laminated optical structure
• Multi-layer nano and anti-reflective coatings applied to both sides
• Water-, oil-, and grease-resistant surface coating

The layered optical design is intended to maintain consistency while reducing internal reflections and flare artifacts not associated with the intended diffusion effect.

Mechanical Construction

• Precision-machined brass frame
• Matte black edge treatment to reduce edge reflections
• Standard 4 x 5.65 tray format

The brass frame construction is intended to maintain dimensional stability and reduce binding during filter insertion and removal.

Image Characteristics

The filter produces:

• Highlight blooming
• Lower perceived contrast
• Softer tonal transitions
• Reduced edge harshness

The diffusion behavior is designed to maintain overall image detail while altering highlight rolloff and specular response.

System Behavior

• Passive optical diffusion filter
• No electronic components
• Compatible with:
  • Spherical lenses
  • Anamorphic lenses
  • Matte box filter systems

The filter does not alter the internal optical mechanics of the lens.

Included Components

• 4 x 5.65 Aria Pearl Filter
• Protective felt case
• Filter identification tag

Notes

• Designed for matte boxes supporting 4 x 5.65 filters
• Filter strength selection affects diffusion intensity and highlight spread
• Multiple diffusion filters may be stacked depending on matte box clearance