4in x 5.65in Square UV Filter for Matte Box - Cinema MCUV Protection

In this review the focus is on a square matte box UV filter built for cine workflows and still shooters who mount filters in a matte box system. The bottom line: this 4in x 5.65in square UV filter is for camera operators who need a highclarity protective filter that fits Tilta, SmallRig and similar matte boxes and reduces UV haze without altering color. Its strongest advantage is the imported HD optical glass with 28 multilayer coatings that deliver very high transmittance and resist scratches, water, oil and fingerprints.

Key Features

• Matte box compatibility: Designed to be mounted on a matte box or filter frame, it works with Tilta, SmallRig and mini matte boxes so one filter serves multiple lenses without screwing onto the lens.
• Size and coverage: The 4in x 5.65in (10.16 x 14.35cm) square format covers wide focal lengths when used in a matte box, avoiding vignetting for many cine lenses.
• Imported HD optical glass: Double sided polished glass preserves clarity for 4K and 8K capture without introducing a color cast or softness.
• High transmittance: With reflectivity controlled around 0.2% and transmittance up to 99.6%, it reduces lens reflections and improves overall contrast and detail.
• 28 multilayer coatings: Nanometer coatings on both sides add scratch resistance and make the surface waterproof, oil proof and fingerprint resistant for easier field handling.
• Protection and storage: The filter comes with a protective leather bag that helps protect the glass between shoots.

Who It's For

This filter is aimed at cinematographers, videographers and advanced still photographers who use matte box systems and need a neutral UV protection that will not be mounted directly to the lens. It suits productions that demand clean, high resolution capture for 4K and 8K workflows and operators who switch lenses often but want consistent UV protection and reduced atmospheric haze.

It is less useful for photographers who only use threaded round screwon filters or who do not employ a matte box; those users should look for circular UV filters sized to their lens threads rather than a square matte box element.

Pros & Cons

Pros

• Very high optical clarity from imported HD glass, suitable for high resolution video.
• Extremely high transmittance and low reflectivity that help maintain contrast and reduce flare.
• Durable 28 multilayer coatings make it more resistant to scratches, water, oil and fingerprints.
• Works across lenses when used in a matte box, providing flexible protection without threading to the lens.

Cons

• Not a threaded screwon filter, so it requires a matte box or filter frame to be used.
• Square format may be overkill for casual photographers who need a simple round UV filter.

Specifications

Product type	Square matte box UV filter
Size	4in x 5.65in (10.16 x 14.35cm)
Glass	Imported HD optical glass, double sided polished
Transmittance	Up to 99.6%
Reflectivity	Approximately 0.2%
Coatings	28 multilayer nanometer coatings, both sides
Compatibility	Tilta, SmallRig, mini matte boxes and filter frames

Our Verdict

This square 4in x 5.65in matte box UV filter is a sensible buy for cinematographers and serious photographers who use matte boxes and need a neutral, hightransmittance protective element for 4K/8K capture. The combination of polished HD glass and extensive multicoatings gives reliable image clarity and durability, offering good value when you need consistent protection without compromising color or contrast.

Frequently Asked Questions

Can this filter be screwed onto a lens?
No. This square UV filter is intended to be mounted in a matte box or filter frame rather than directly threaded onto a lens.

Will it cause vignetting on wide lenses?
When used correctly in a matte box the 4in x 5.65in size is designed to avoid vignetting on most lenses, but very wide or specialty optics should be checked for clearance.

Is the surface easy to clean after use?
The 28 multilayer coatings make the surface more resistant to oil and fingerprints and easier to clean, though care with a proper cleaning cloth is still recommended.