I’ve upgraded from the Action Cam 4 to the 6 and needed some new filters ready for the summer riding season. It’s a bit too dull in the UK right now for my use case, so even an ND8 is often more than I need, but I know these will be perfect once the brighter months roll around. I’ve used K&F filters on my older action cam, so I already trusted the brand, and these are the same high quality as my older ones. The glass is clear with no imperfections that I can see, and the fit is spot on. They screw on properly, which matters a lot to me because I use them on a motorbike. I’ve tried cheaper filters in the past that clip on or feel a bit loose, and they’ve fallen off mid ride. These feel secure and properly made.They also come with a little case, which is a nice bonus for chucking in a bag without everything rattling around. The packaging mentions “Optical Glass with 28 Layer Nano Coating”. I can’t test that in a lab, but I can say I ride in dusty conditions and I’ve had wind and grit leave tiny scratches on lenses before, so anything that helps with durability is a big plus for me.At £39.99 at the time of writing for four lenses, I think that’s a fair price for a full set from a brand that actually fits properly and feels made for real use.

The kit is a great travel accessory and the filters are easy to attach thanks to the threaded design. The build quality feels solid, and the HD optical glass produces clear, sharp footage without any noticeable loss in image quality.The 28-layer nano-coating makes a real difference too—my footage looks cleaner, and the filters are easy to wipe without leaving streaks. I also appreciate having the ND8, ND16, and ND32 options, as they give me flexibility for different lighting conditions, especially when shooting outdoors in bright sunlight. The CPL filter is particularly useful for reducing reflections and enhancing colour contrast.Overall, this filter kit has improved my video quality and made outdoor shooting much more manageable. It’s a great value for the price and a must-have for anyone using the DJI Osmo Action 6

I have multiple products from K&F including several filters and ND kits for my drones , camera and action cams. I'm pleased to say these don't disappoint either.Very easy to fit and they feel solid, not worried at all that they might fall during use, even if you mount the action cam on something that gives it serious shakes such as a bicycle handlebar going downhill.I love the ND and PL effects as they improve the dynamic range as well as eliminate (mostly) the water or glass reflections/glare + provide a deep blue gradient o the sky which I feel always adds a bit of character to any photo or footage I shoot.

The ND filters are good, unfortunately I can't say whether they match what's on them, but you can tell the differences.
The CPL filter doesn't really convince me, it doesn't cope with all reflections, it definitely works better, even though the price for 4 filters is really okay.
The filters are definitely a perfect fit for the DJI Osmo Action 6.
Nothing is too tight or too rickety.
The storage box serves its purpose and is nice and small.

To be honest, I'm not entirely sure whether you need a CPL filter for an action camera, but I'll test that as well.

Overall, it is a good set at a fair price.

This set of K&F Concept ND filters for the DJI Action 6 is an essential collection to have to hand for anyone wanting greater control over the quality of their photos and videos. The selection offers a good range to deal with brighter lighting conditions and/or glare from snow or water. They screw onto the lens in just the same way as the stock lens cover and offers the same level of water, dust and shock protection, so are really easy to use.The ND filtration levels are high quality and seem accurate, as I've come to expect from the brand, so they function well and ND8-ND64 provides a good range for most situations.Come well protected in cushioned packaging inside a plastic case, so they take up very little space in the kit bag.While this isn't a cheap addition to your kit at £39.99, it's a useful selection of filters made to a very high quality from a reputable brand in the field, so they are worth the money for anyone wanting greater control over the quality of their photography.

This gives a nice albeit very subtle diffusion and doesn’t appear like it gives much of a colour shift too - which is great. It is easy to install and fits well. Will need to use it in more conditions such as when the summer months arrive to see how it functions under the sun, but so far so good. I would say it’s value for money.

The K&F CONCEPT ND8, ND16, ND32, ND64 , Neutral Density filters for the DJI Action 6 arrived nicely packaged in a fully sealed box so dust didn't get inside the filters which is great!The filters alsocome with a mini lens cloth, So you can wipe your prince from the glass when you need to.This is a lovely kit with ND 8, 16, 32, 64, So it comes with all the main ones to slow down your shut speed so you get some nice motion blur on your video footage.I got these filters in preparation of getting my DJI action 6, I'm currently running a DJI action 5 Pro and these filters do not fit, because the action 6 lens is slightly bigger! I already knew this, but I got them anyway As I love K&F filters!K&F usually I really good with neutral density filters and I find you get less colour cast then the rest of the cheaper brands out there.Bear in mind these DJ actions 6 Pro filters are the screw in type, so they do not pop on the original lens. Have to physically unscrew the original and install these.This can be a good thing or a bad thing depending on how you look at it. Sure it takes more time, but having the screwing type there's less likely to fall off in action packed scenarios.Overall, these filters look great and they are super high quality as you would expect from a well-known brand. I have absolutely no complaints as of yet, I'll update this review when I finally get my DJI action 6.

Great item does exactly what it designed to do

Very high quality and good ND effects highly recommended

1. First Impression / Build Quality / Fit: The filters are cleanly manufactured, fit the DJI Osmo Action 6 perfectly, and can be easily mounted without having to remove protective cases or other accessories. The optical glass appears high-quality, the mounts are lightweight yet sturdy, and do not affect the camera's balance or handling. The included storage box and cleaning cloth further emphasize the well-thought-out overall impression. 2. Practical Test / Image Effect & Control: In use, the filters clearly demonstrate their strengths. The ND filters, with ND8, ND16, and ND32, cover practical light reduction levels and allow for precise control of exposure and shutter speed, especially in sunny conditions or with fast movements. Motion blur appears more natural, and the overall image is smoother and more cinematic. The CPL filter reliably reduces reflections on water, glass, or wet surfaces, resulting in visibly richer colors and improved contrast. The effect is clearly noticeable, especially in outdoor sports, landscape, or winter scenes, without appearing unnatural. The 28-layer nano-coating proves to be very robust in everyday use: Drops bead up, dust hardly adheres, and even frequent cleaning leaves no trace. 3. Personal Conclusion The K&F CONCEPT filter set is a very worthwhile addition for anyone who wants to get more out of their DJI Osmo Action 6. It combines high optical quality with reliable mechanics and a practical selection of filter strengths. A particularly positive aspect is that the filters remain lightweight and do not negatively affect camera stabilization.