Simmod Aria Pearl Filter (77mm, Grade 1/8)

Diffusion filters alter highlight response, contrast behavior, 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 (77mm Circular) is a screw-in diffusion filter designed for lenses with a 77mm front filter thread, producing a pearlescent glow around highlights while gently lowering contrast and softening image texture.

Filter Format

• Rear thread size: 77mm
• Front thread size: 77mm
• Available strengths:
  • 1/8
  • 1/4
  • 1/2

The front threading allows additional filters or accessories to be mounted if required.

Optical Function

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

The filter is designed to:

• Create a pearlescent halo around highlights
• Reduce overall image contrast
• Soften fine detail and skin texture
• Produce smoother highlight transitions
• Introduce controlled halation while maintaining 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-ground optical surfaces
• Laminated filter structure
• Nano and anti-reflective coatings applied to both sides
• Water-, oil-, and grease-resistant surface coating

The optical design is intended to maintain consistency while minimizing unwanted internal reflections and ghosting.

Mechanical Construction

• Precision-machined brass filter ring
• Matte black internal finish to reduce reflections
• Precision-threaded front and rear interfaces

The brass construction is designed to reduce thread binding and maintain dimensional stability during repeated installation and removal.

Image Characteristics

The filter produces:

• Highlight blooming
• Reduced perceived contrast
• Softer tonal transitions
• Lower edge sharpness without heavy diffusion
• Mild cosmetic softening of skin texture

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

System Behavior

• Passive optical diffusion filter
• No electronic components
• Compatible with:
  • Spherical lenses
  • Anamorphic lenses
  • Matte box workflows using threaded adapters

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

Included Components

• 77mm Aria Pearl Filter
• Protective storage case

Notes

• Requires a 77mm front filter thread or compatible step ring
• Multiple filters may be stacked using the front filter threads
• Filter strength selection affects diffusion intensity and highlight spread