ND8 (3 stop) Lens Filter Neutral Density with 28-layer Coating Compatible with DJI Osmo Action 4, Osmo Action 5 Pro

I ordered this for Christmas photography this year (2024). And it does not disappoint. I’ve included the first shot I took with it using my DJI Action 5. No post enhancement except a bit of crop to show the effects a little closer..

K&F has got heavy into third party filter offerings. They have a tremendous volume of filters for nearly every camera. What I like is, they have different tiers so people on a budget can get something decent that won’t break the bank. However, in my trials, I like their Nano-X line, which I believe is their top quality. Those are rather expensive and nearly put themselves in the price categories of Hoya, Breathrough Photography and B&W. I have all these filters and will say, the K&F are good. When on sale, a better value than the rest. Though my favorite filters will always be B&W.

Anyways, this model is very good. The threads are solid, it feels well built and the glass is excellent. I mean, remember, this is an action camera. So if you really want top results get something for your mirrorless. But for my Action 5 I’m thrilled to use this and will get lots video miles and stills this holiday season.

Recommended.

I got these for my Osmo Action 5 but they will fit the 4 as well. Be warned that you need to carefully remove the factory lens before installing these. It can be tricky so make sure you research the method first to avoid damaging your camera.

They are supplied in their own protective hard case. The CPL filter is great for water sports in bright reflective surroundings removing glare and improving saturation. The ND filters have various levels of light reduction creating a soft, cinematic, there is a slight colour tinge when you review footage but it hasn’t bothered me.

Overall, an handy addition to the camera and excellent value for money.

The large set truly has something for every lighting situation.

This K&F Concept 4-Pack Filters is designed for the DJI Osmo Action 5 Pro action camera. Each of them replaces the original protective glass that is screwed onto the front of the camera by the manufacturer - You can see the red rubber ring that forms the seal and also acts to make the original protective glass very reluctant to start coming off.
The set of filters comprises of three neutral density (ND) filters and one circular polarising (CPL) filter.
The ND filters have densities that give factors of 8, 16 and 32 or, 3, 4 and 5 stops. They are coated so that you get minimal reflections and they have a purply-blue hue to the coatings. You can see in the photograph of its reflection that the front and back surfaces are flat and well aligned with each other.
The circularly polarising filter screws onto the camera in the same way as the other filters but being a polariser, you need to be able to adjust its angle of orientation and you do this by rotating the front section when it is screwed on. You can see in the photograph that the CPL filter has a little white arrow on it so that you can tell which way it is pointing.
However, if you hold the CPL filter so that it reflects a well defined light source, you will see that you get the front green reflection but the other reflection you get is offset laterally, indicating that the front and the back of the filter are not parallel. Additionally, I noticed that the reflection was uneven, indicating that it was not particularly flat either - this reducing the definition of the optical system as it blurs the image, reducing local contrast and generally reducing its quality whereas the ND filters did not show this.
This is a useful little set of lenses although a linearly polarising (LP) filter would have been a better choice as they werk a lot better than CPL filters and the camera doesn't seem to suffer from the exposure errors that LP filters gave some DSLRs that led to CPL filters becoming the norm several decades ago. Further, the quality of the CPL filter is not as good as the ND filters.

These filters are very good.

I made videos of fish among the corals in Réunion, but the images were white. So I used the ND8 filter (WITH 60M WATERPROOF CASE) and was finally able to make usable videos!

During hikes: ND16 filter.

This is a good little set that helps on sunnier days to help lower the shutter speed to get more cinematic footage, ideally if say you are shooting 4k 25fps you want a shutter of double that so 1/50th to keep everything organic looking and not choppy, this is the secret to more cinematic looking footage and these nd filters from k&f help to do that.

They are well made and to fit them you unscrew your lens covers on your Action 5 pro and screw on the required nd filter, they include up to nd32 which works well on moderately sunny days and also a 16 and 8, they also include a cpl filter, they do add a little colour cast but nothing drastic, highly usable for me and my videos, optical quality remains the same thanks to them using good quality optical grade glass.

they also include a nice protective case for storing and transporting them around in, overall I've been very impressed with them