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NiSi Polarizer 4x4 Ikan Polarizing Filter — main product image
NiSi

NiSi Polarizer 4x4 Ikan Polarizing Filter

★★★★★5.0 (1 reviews)
4K

A cinema-grade 4x4-inch polarizing filter built with precision AGC glass and Nitto film for professional motion picture work.

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Overview

The NiSi 4x4 Polarizing Filter is designed specifically for digital cinema workflows where image quality cannot be compromised. Built with high-quality AGC (Asahi Glass Co.) optical glass and Nitto polarizing film — both established names in optical manufacturing — this filter reduces unwanted reflections and glare from non-metallic surfaces such as water, glass, and foliage. The result is richer color saturation, improved contrast, and cleaner footage that requires less correction in post-production.

Precision cutting and polishing ensure that the 4x4-inch filter maintains extreme flatness and parallelism, which is critical for avoiding optical distortion when shooting with high-resolution cinema cameras. The square format slots into standard 4x4 matte box trays, making it compatible with widely used cinema rigs from manufacturers like Tilta, Bright Tangerine, and Wooden Camera. As with any polarizer, shooters should account for the 1-2 stop light loss and be mindful of the polarization angle relative to the light source, adjusting the filter's rotation within the tray to achieve the desired effect on each shot.

Key Features

Linear polarizer

Ultra low color shifting with high quality polarizing film

Strict control over lens surface flatness and parallelism

AGC 4mm thick glass with optical processing technology, coarse gridding, fine grinding, and polishing

Optimized for shooting raw 4K digital images

Specifications

Brand
NiSi
Filter Type
Polarizing
Size
4 x 4 inches
Glass Material
AGC (Asahi Glass Co.) Optical Glass
Polarizing Film
Nitto
Color
Black

Pros & Cons

👍 Pros

  • AGC optical glass and Nitto polarizing film deliver high clarity with minimal color cast or image degradation.
  • Precision-cut and polished to ensure extreme flatness and parallelism across the 4x4-inch surface.
  • The 4x4-inch square format is compatible with industry-standard cinema matte box systems.
  • Effectively reduces reflections on glass, water, and non-metallic surfaces for cleaner footage.

👎 Cons

  • The 4x4-inch format is only useful with a matte box — it cannot be threaded onto a standard lens filter ring.
  • Polarizing filters inherently reduce light by 1-2 stops, requiring exposure compensation in low-light conditions.
  • No rotation mechanism is built into the filter itself, so precise adjustment depends on the matte box tray design.
  • Limited to a single fixed polarization orientation — requires manual repositioning to change the effect angle.

Frequently Asked Questions

It fits standard 4x4-inch matte boxes and filter holders commonly used in digital cinema and professional video production.
This is a linear polarizing filter, which is the standard type used in cinema matte box setups where autofocus interference is not a concern.
It uses high-quality AGC (Asahi Glass Co.) optical glass paired with Nitto polarizing film, both known for their optical clarity and durability.
In a 4x4 matte box, you rotate the filter manually within the filter tray to adjust the angle of polarization and control the amount of glare or reflection reduction.
Yes, like all polarizing filters, it reduces incoming light by approximately 1 to 2 stops, which should be compensated for in your exposure settings.

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