SMALLRIG 52mm Magnetic CPL Filter Kit for iPhone 15 Phone Cage

In this review the SMALLRIG 52mm Magnetic Circular Polarizers Filter Kit is evaluated for mobile photographers who use an iPhone 15 with a compatible phone cage. The kit's single biggest reason to buy is its magnetic M mount system that makes attaching a circular polarizer simple and repeatable, improving color saturation and reducing reflections on glass and water. The reviewer found it particularly useful for landscape and architectural shots where a truer sky and deeper contrast matter.

Key Features

• Standard M Mount Design: The quick-release M mount fits SMALLRIG phone cages and other M mount cases for fast, secure attachment when shooting on the go.
• CPL Filter Function: The circular polarizer reduces reflections from non-metallic surfaces and increases saturation to make skies appear bluer and water clearer.
• Magnetic Design: The magnetic CPL snaps to the matching filter ring for rapid removal and replacement without fiddly threads.
• Multi Coated HD Optical Glass: Premium AGC optical glass with a true color film and 28-layer nano coatings resists water, oil, dirt and scratches for reliable outdoor use.
• Ultra Slim Aluminum Alloy Frame: A 3.5mm CNC aluminum frame reduces vignetting on ultra wide lenses and provides an anti-slip edge for easy rotation.
• Complete Kit: Includes the 52mm CPL filter, M mount magnetic ring, microfiber cleaning cloth and a portable storage case for field convenience.

Who It's For

The kit is aimed at iPhone 15 users and mobile photographers who already use a SMALLRIG or other M mount phone cage and want a compact way to control reflections and boost color when shooting landscapes, water scenes or windows. It is also useful for content creators who need a fast, repeatable filter mount during walks or quick shoots.

Photographers who do not use an M mount phone cage or who need multi-stop neutral density control should look elsewhere, since this kit focuses on polarization and requires the matching magnetic ring or compatible M mount case to function as intended.

Pros & Cons

Pros

• Magnetic quick-attach system makes swapping the CPL fast and intuitive without screwing rings on and off.
• High-quality AGC optical glass with multi coatings preserves realistic color and resists grime in outdoor conditions.
• Slim CNC aluminum frame minimizes vignetting on wide lenses while offering a tactile edge for rotation control.

Cons

• Requires an M mount phone cage or compatible case to use, so it is not a standalone clip-on filter for every phone.

Specifications

Filter Type	Circular Polarizer (CPL)
Filter Diameter	52mm
Mount Type	Standard M Mount magnetic ring
Glass	Imported AGC optical glass with true color film
Coatings	28-layer nano multi coating on both sides
Frame	3.5mm ultra slim CNC aluminum alloy
Kit Includes	CPL filter 4216, M Mount ring 3840C, cleaning cloth, storage case

Our Verdict

The SMALLRIG 52mm Magnetic CPL Filter Kit is a pragmatic choice for iPhone 15 users who shoot outdoors and already use an M mount phone cage. Its magnetic quick-attach, high-quality optical glass and slim frame deliver noticeably better skies and reduced reflections for landscape and architectural work, making it good value for anyone wanting cleaner, more saturated mobile images without bulky gear.

Frequently Asked Questions

Will this work with my phone case?
The filter requires a phone cage or case with a standard M mount; it is compatible with SMALLRIG M mount cages and other M mount cases like Moment.

Does the filter reduce image quality?
No, the review found the AGC optical glass and multi coatings preserve realistic color and do not introduce noticeable degradation when mounted correctly.

What is included in the kit?
The kit includes the 52mm CPL filter, the M Mount magnetic filter ring, a professional microfiber cleaning cloth and a portable storage case.