SmallRig Mini Matte Box Pro Flag Kit - Quick-Release Filter System

In this review the SmallRig Mini Matte Box Pro Flag Kit is examined for shooters who need a compact, modular way to control flare and use square or circular filters on a variety of lenses. The bottom line: this matte box is best for run-and-gun video shooters and indie filmmakers who want a lightweight, carbon fiber design with fast mounting and reliable sun control. The single biggest reason to buy is the quick release module, which lets the filter frame and side flag slide on and off in about a second, making it easy to adapt between setups.

Key Features

• Quick Release Module: The filter frame and side flag install and remove in one second via a sliding slot, helping speed up changeovers on location.
• Modular Adapter Rings: Includes adapter rings that fit standard lenses from 52mm up to 86mm and accept circular filters up to 92.5mm, so it works with many lens kits.
• Filter Compatibility: Accepts 4mm-thick square filters in 4 x 4 and 4 x 5.65 sizes, allowing use of common creative and ND filters regardless of brand.
• Lightweight Build: Carbon fiber elements keep overall weight down, which is helpful for gimbal use or handheld work.
• Side Flag Control: The included side flag reduces glare and stray light without adding complex rigging, making outdoor scenes cleaner.

Who It's For

The SmallRig Mini Matte Box Pro is aimed at independent filmmakers, documentary shooters, and content creators who need a compact matte box that mounts quickly and supports both square and circular filters. Its lightweight, carbon fiber design and fast slide-in filter frames make it especially useful for handheld, gimbal, or run-and-gun shoots.

Shoots that require very large cine lenses with special micro thread sizes should look elsewhere, because while the system is compatible with 95mm cinema lenses it is not compatible with 95mm micro lenses. Also, if you need thicker or nonstandard filters beyond 4mm thickness, this kit will not accept them.

Pros & Cons

Pros

• Solid build quality with a carbon fiber, lightweight design that feels durable on the camera.
• Very fast mounting thanks to the quick release module, saving setup time between takes.
• Versatile filter support for both 4 x 4 and 4 x 5.65 square filters plus circular filters to 92.5mm.

Cons

• Some users report mixed ease of filter access, so adding or removing filters can be fiddly depending on your workflow.

Specifications

Product Type	Mini matte box with flag
Filter Frame Sizes	4 x 4 and 4 x 5.65
Circular Filter Support	Up to 92.5mm
Lens Thread Compatibility	52, 55, 58, 62, 67, 72, 77, 82, 86mm
95mm Lenses	Compatible with 95mm cinema lenses (not 95mm micro lenses)
Filter Thickness	Supports 4mm thick filters
Design	Carbon fiber lightweight construction

Our Verdict

The SmallRig Mini Matte Box Pro Flag Kit is a practical, well-built matte box for shooters who value quick transitions and lightweight gear. It delivers good value for filmmakers who use standard lens threads and 4 x 4 or 4 x 5.65 filters, though those needing unusual filter thicknesses or micro 95mm threads should consider alternatives. For on-location work and gimbal setups the fast release and modular adapters make it an efficient upgrade.

Frequently Asked Questions

Will it fit my circular lens filter?
It accepts circular filters up to 92.5mm and works with standard lens threads from 52mm to 86mm using the included adapter rings.

Can it take thick or oversized filters?
The kit is designed for filters with a thickness of 4mm; thicker or nonstandard filters are not supported.

Is it compatible with 95mm lenses?
Yes, it is compatible with 95mm cinema lenses but not with 95mm micro lenses.