SmallRig KG035211 67mm Magnetic Filter Adapter T-Mount — main product image

SmallRig KG035211 67mm Magnetic Filter Adapter T-Mount

SmallRig

SmallRig KG035211 67mm Magnetic Filter Adapter T-Mount

Name: SmallRig KG035211 67mm Magnetic Filter Adapter T-Mount
Brand: SmallRig
SKU: KG035211

Snap on a 67mm magnetic filter in seconds — purpose-built for SmallRig iPhone cage T-mount systems.

$22.99*

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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The SmallRig KG035211 67mm Magnetic Filter Adapter is a purpose-built accessory for mobile photographers and videographers who shoot within the SmallRig iPhone cage ecosystem. Designed exclusively for use with the T-mount lens backplane (4399), it transforms your iPhone cage into a filter-ready system capable of accepting the full range of SmallRig 67mm magnetic filters — VND, CPL, black mist, and more. The appeal is straightforward: instead of threading and unthreading filters between setups, you're snapping them on and pulling them off in a single motion, keeping your creative momentum intact on a run-and-gun shoot.

Construction is aluminum and silicone — solid enough to stay rigid in a bag, light enough not to upset the balance of a handheld cage rig. The standout feature beyond the magnet is the rotating stop, which prevents filter deviation when you're dialing in a CPL angle or VND exposure stop. Without it, releasing the filter after rotation risks nudging it off your target position — a small but genuinely frustrating problem that SmallRig has addressed directly. The included magnetic-to-threaded adapter ring extends compatibility to standard 67mm threaded filters from other brands, so your existing glass isn't left on the shelf. Dimensions are 4.17 × 3.9 × 1.22 inches and the adapter is confirmed to leave the iPhone's full lens array — ultra-wide through telephoto — completely unobstructed.

Key Features

【For SmallRig Phone Cage with T Mount】This 67mm magnetic filter ring 4585 is only compatible with SmallRig Phone Cage with T-mount backplane 4399. This filter adapter needs to be used with lens backplane 4399 to be compatible with SmallRig Phone Cage for iPhone 15 Series 4407/ 4392 / 4397 / 4391 /4393 / 4396 / 4398 / 4473.

【Quick-release Magnetic Design】The filter and the filter adapter are fixed by magnetic suction, which can be installed and taken out in seconds. Photographers can quickly switch filters according to different needs for light.

【Filter Compatibility】Compatible with all SmallRig 67mm magnetic filters, such as SmallRig 67mm VND magnetic filter 4581, 67mm CPL magnetic filter 4582, 67mm magnetic black mist filter 4583, etc. If you have a 67mm threaded filter from another brand, you can also connect your threaded filters through the magnetic-to-threaded adapter ring that comes with the kit.

【No Impact on Lens Operations】The magnetic filter adapter 4585 does not block the phone's original lenses or affect the way other functions work, such as Ultra-Wide, Wide, Telephoto, Lidar, and Flash.

【Rotating Stop Design】The rotating stop design prevents filter deviation during adjustment to recisely adjust the desired filter angle.

Specifications

Compatibility

SmallRig Phone Cage with T-Mount Backplane 4399; iPhone 15 Series cages 4407/4392/4397/4391/4393/4396/4398/4473

Filter Size

67mm

Filter Installation

Magnetic quick-release

Material

Aluminum, Silicone

Dimensions

4.17 x 3.90 x 1.22 inches

Weight

1.94 oz

Part Number

KG035211 / 4585

Pros & Cons

👍 Pros

The magnetic quick-release lets you swap between CPL, VND, and black mist filters in seconds — no thread-spinning mid-shoot.
The rotating stop design locks your VND or CPL at a precise angle, preventing accidental drift when you pull your hand away.
Compatibility with threaded third-party 67mm filters via the included adapter ring extends your existing filter collection to this system.
The adapter does not interfere with any of the iPhone's native lenses or LiDAR, so you retain full camera app functionality.
Aluminum construction keeps the adapter rigid and lightweight, adding minimal bulk to a mobile cage setup.

👎 Cons

Compatibility is strictly limited to SmallRig T-mount backplane 4399 — useless without that specific component already in your rig.
At 1.94 oz the adapter adds noticeable weight to a smartphone cage that was chosen partly for its portability.
The magnetic connection, while fast, may not hold as securely as a threaded filter in high-vibration environments or during action shooting.
Works only with 67mm filters — shooters who already own 77mm or 82mm glass cannot use those filters with this system.
No indication of weather sealing on the magnetic interface, which could be a concern in light rain or dusty outdoor conditions.

Frequently Asked Questions

Which SmallRig phone cages is this adapter actually compatible with?

This adapter requires the SmallRig T-mount lens backplane (4399) to function. With that backplane installed, it works with SmallRig iPhone 15 Series cages 4407, 4392, 4397, 4391, 4393, 4396, 4398, and 4473.

Can I use non-SmallRig 67mm filters with this adapter?

Yes, with a caveat. The kit includes a magnetic-to-threaded adapter ring, so standard 67mm threaded filters from other brands can attach. Native SmallRig 67mm magnetic filters (VND 4581, CPL 4582, Black Mist 4583) snap on directly without the adapter ring.

Does attaching this adapter block the phone's ultra-wide or telephoto lenses?

No. The 4585 is designed specifically to avoid obstructing the phone's built-in lens array. Ultra-wide, wide, telephoto, LiDAR, and the flash remain fully accessible with the adapter mounted.

What does the rotating stop design actually do during shooting?

The rotating stop prevents the filter from drifting off your dialed-in angle during adjustment. When you're setting a VND exposure or rotating a CPL to kill a reflection, the stop locks the position precisely so it doesn't shift as you release the filter.

What materials is the adapter made from, and how much does it weigh?

The adapter is constructed from aluminum and silicone and weighs 1.94 ounces (approximately 55g). The aluminum body keeps it rigid while the silicone elements protect contact surfaces during magnetic attachment and removal.