SmallRig 4 x 5.65 ND 1.8 (6 Stop) Filter - Square Matte Box ND

In this review the SmallRig 4 x 5.65 ND 1.8 (6 Stop) Filter is evaluated for photographers and videographers who need consistent exposure control in bright outdoor scenes. The bottom line: it is a robust, square neutral density solution that delivers reliable 6-stop light reduction with minimal color shift, making it best for landscape, sunset/sunrise and cinematic outdoor work where stacking and matte box use are common. The reviewer found the optical quality and coating performance the most compelling reasons to choose this filter.

Key Features

• ND 1.8 (6 Stop): Provides a predictable 6-stop exposure reduction so shooters can use wider apertures or slower shutter speeds in bright conditions.
• Square 4 x 5.65 in format: Fits matte boxes and 4 x 5.65 in filter trays to allow stacking and easy combination with other filters for greater creative control.
• 1.56% light transmittance: Low transmittance yields consistent attenuation across the frame for long-exposure and motion-blur effects without guesswork.
• Double-sided multilayer nano-coating: Coatings cut lens flare, resist water and oil, and make the glass easier to clean on location.
• B270 optical glass: Precisely ground and polished glass preserves detail and color accuracy for stills and motion work.
• Included accessories: Arrives with a padded carrying bag and cleaning cloth so the filter can be protected and maintained between shoots.

Who It's For

This filter is aimed at professional and enthusiast photographers and videographers who use a matte box or 4 x 5.65 in tray and need dependable, repeatable light reduction for landscape, time-lapse, portrait or cinematic exterior work. It suits users who value color accuracy and want a rectangular filter that stacks cleanly with grads or polarizers.

It is less suited for shooters who rely exclusively on circular screw-on filters or those using 100 x 150 mm trays, since this product is incompatible with that size. Casual users who rarely change exposure or who do not use a matte box may prefer a simpler, screw-in solution.

Pros & Cons

Pros

• High color fidelity and minimal color shift thanks to B270 glass and precision polishing.
• Durable double-sided nano-coating that reduces flare and is water and oil resistant for field use.
• Works well in stacked setups and with SmallRig matte boxes for flexible workflow on set.
• Comes with a padded carry bag and cleaning cloth for safe transport and maintenance.

Cons

• At 4 mm thickness some users may find it thicker than expected, which can affect tray stacking choices.
• Not compatible with 100 x 150 mm trays, limiting use with some larger matte box systems.

Specifications

Filter type	Neutral Density (ND 1.8 / 6 stop)
Format	4 x 5.65 in square
Thickness	4 mm
Glass	B270 optical glass
Light transmittance	1.56%
Coating	Double-sided multilayer nano-coating (waterproof, oil-resistant, anti-scratch)
Included	Carrying bag and clean cloth

Our Verdict

The SmallRig 4 x 5.65 ND 1.8 (6 Stop) Filter is a solid, practical choice for shooters who need reliable 6-stop attenuation with excellent color fidelity and durable coatings for outdoor use. It offers strong value for users with compatible matte boxes and those who plan to stack filters, but buyers should confirm tray compatibility and consider the 4 mm thickness when planning their setup.

Frequently Asked Questions

Will this fit my matte box?
It fits matte boxes and filter trays sized for 4 x 5.65 in, including several SmallRig matte boxes; it is not compatible with 100 x 150 mm trays.

Does the filter cause color shift?
In testing and customer feedback the B270 glass and coatings produce minimal color shift, preserving accurate color reproduction for most outdoor scenes.

What comes in the package?
The package includes the 4 x 5.65 in ND1.8 (6 Stop) filter, a padded carrying bag and a clean cloth for maintenance.