K&F Concept Snap-on ND8/ND16/ND32/ND64 Filter Set for DJI Osmo Action 5 PRO / Osmo Action 4/3

What to know

The K&F Concept four-pack ND filters are designed to snap onto compatible DJI Osmo Action cameras without removing the existing lens elements. The set covers ND8, ND16, ND32 and ND64, offering 3 to 6 stops of light reduction to suit variable daylight conditions. On paper, this approach helps maintain intentional shutter speeds and retain motion clarity in bright environments, especially when you want to keep a natural motion blur or control exposure in sunny outdoor scenes.

What stands out

The filters are built from AGC optical glass, with a 28-layer coating intended to cut glare and boost colour, contrast and sharpness. The blackened frame surface aims to minimise reflections from the filter itself, which can otherwise degrade contrast in high‑contrast shots. The snap-on design is a practical edge for quick changes on the move—especially if you’re filming outdoors or in action-packed settings where stopping to swap filters would disrupt the moment.

How it works in practice

ND8 reduces light by 3 stops, ND16 by 4, ND32 by 5 and ND64 by 6, making them suitable for settings ranging from overcast or partly cloudy daylight to bright sun. This is useful when you want to keep a modest shutter speed to preserve motion but still avoid blown highlights. If you’re shooting moving water, mountains, or busy city scenes, these options give you more creative control over exposure balance.

Who this is for

If you own a DJI Osmo Action 5 Pro, 4 or 3 and frequently shoot outdoors in varying light, this set can be a practical addition to your kit. It may appeal to vloggers, travellers and outdoor creators looking for a simple, lightweight way to adapt exposure without fiddling with more complex filters or housings. It is not necessarily aimed at those chasing extreme dynamic range or the absolute smallest possible weight, it’s about convenient, predictable exposure control.

Limitations to note

Despite the snap-on convenience, the effect of ND filters is still subject to lighting conditions and camera settings. In very bright scenes, ND64 can over‑reduce light if you’re not adjusting other settings, potentially making footage look unnecessarily dark or requiring a higher ISO. Remember, ND filters don’t improve dynamic range, they primarily influence exposure and motion blur. Consider whether you need a graduated option for sky vs foreground or if constant ND filtration across the frame suits your style.

When it makes sense to buy

The set makes sense if you value quick on‑the‑go exposure control and you’re already invested in the Osmo Action ecosystem. If you shoot action sports, travel lot of daytime outdoor footage, or film scenes where you want smoother motion with slower shutter speeds, these filters can reduce the need for frequent post‑production corrections related to exposure.

When you might skip it

If you rarely shoot in bright sun or you rely mainly on auto exposure, the benefit of ND filters is marginal. If the added weight or the cost of filters isn’t justified for your typical workflow, or you already have a single versatile ND option that works across your usual shooting scenarios, you might deprioritise a spare four-pack.

What to check before purchasing

Confirm compatibility with your exact Osmo Action model and ensure the snap-on design remains unobstructed by the camera housing or protective case. Evaluate how you balance exposure with shutter speed in your typical scenes, plan which ND strength you’d use most often. A quick test setup in a bright outdoor environment can help you understand the practical impact on motion blur and image brightness before committing to a full purchase.

Practical example of use

Imagine a seaside scene with waves and a moving shoreline. Using ND16 or ND32, you can keep the shutter speed at a deliberate level, preserving the sense of motion while preventing blown highlights on sunlit water and rocks. The quick swap should feel intuitive when you’re changing light mid‑shoot, letting you adapt from a shady break to a bright open coast without fumbling with more complex filters.

What you get (In the box)

In keeping with the product’s purpose, the four ND filters come as a set for Osmo Action series, with each piece designed to snap on without removing existing filters. The packaging mentions the 28‑layer coating and the coffee‑dark frame surface intended to reduce internal reflections, though exact packaging details aren’t provided here.

FAQ (practical answers)

• Do these filters affect image sharpness noticeably? They use AGC optical glass with multiple coatings, which aims to preserve clarity, but any glass in front of a sensor can soften images slightly if the quality is not up to expectations.
• Are the filters compatible with protective housings or cases? The description specifies snap-on use on Osmo Action models, external accessories or cases could affect fit unless designed for it.
• Will ND64 be too dark for indoor filming? ND64 is intended for very bright light, indoors it will require compensating adjustments or not be suitable.

Is it worth it?

It makes sense if you prioritise quick, reliable exposure control during outdoor shooting with a DJI Osmo Action, and you value a lightweight, simple kit that doesn’t require removing the original filters. If your typical shoots are mostly in moderate light or you already have a preferred single-filter solution, the benefit may be moderate rather than essential.