The build quality is excellent, solid metal frame, smooth threading, and the glass looks crystal clear with great coatings. It feels like a premium piece of kit without being crazy expensive. What I love most is the effect. I went with the 1/8 strength, and it’s perfect for softening up those ultra-sharp digital images without making things look muddy. Highlights bloom just enough to give that cinematic vibe, and skin tones look super flattering. It’s subtle, but it makes a big difference, especially for interviews, portraits, or any creative shots where you want a little mood. The case is a nice bonus too, sturdy with a magnetic flap, so it’s easy to toss in your bag without worrying about scratches.

Take your video to the next level. Whenever you are recording and you feel your recording looks like the news and not the a movie, this filter will take off that edge to give is a more cinematic look. This is a 1/8 filter. So it takes off the edge slightly less. So more HD than cinematic. But it does not look like a live new recording. I think I would go with the 1/4 in the future to really take the edge off. Overall, great quality. The carrying case is leather and nice quality. You can also use it as a lens protector. I would also suggest getting the largest size and by cheap adapter rings to make it fit any size lens. I did not notice any loss in quality or color using it.

very subtle Black Mist effect. Tried this mostly with still photography. It adds a little bit of a glow and subtle softness but not at the expense of focus. Almost unnoticeable but nice low profile and high quality feeling construction.

Comes with a high quality feeling case.

I’ve used a handful of diffusion filters over the years, and I really like the ones from K&F Concept I picked this up mostly for portrait work and some night street photography.
The effect is subtle but noticeable. It softens highlights just enough to give that dreamy, cinematic glow without turning everything into a foggy mess. Street lights, candles, even harsh LED signs get a nice bloom that feels organic. It’s great for video too, and adds that texture without needing post-production filters.
Build-wise, it’s solid. The frame is ultra-slim, so no vignetting even on my wide-angle lens. It screws on smoothly and doesn’t feel cheap, which is more than I can say for some filters in this price range. I also appreciate that it doesn’t mess with color balance, no weird tints or shifts, just clean diffusion.
One thing to note: if you’re expecting a heavy mist effect, this isn’t that. It’s more of a 1/4 strength softener, which is perfect for keeping detail while still smoothing out harsh edges. If you want something stronger, you might want to look at the 1/2 version.
Overall, for the price, this filter punches way above its weight. It’s great for portraits, vlogs, and nighttime city shots. If you’re chasing that “cinematic” look without breaking the bank, this is a solid pick. The only thing I wish was included is a lens cover. I have to remove this to put my lens cover on, they should make these with covers.

Adds the soft and dreamy feeling to content! Softens highlights and adds a touch of nostalgic grain to the photos and videos.

This filter is well made and the threads fit smoothly. I've only managed a few photos with it, and so far no issues. The lens cap seems to fit well and stay put when using this filter. My only real complaint is that they spent a bunch of time and effort to make a really elaborate and probably expensive case that takes up more space than necessary. I'd rather have a simple plastic one that fits well and save some money on the overall cost.

Very good quality Black Diffusion 1/4 Filter from K&F Concept made from very good materials.

I have been using this filter for just over two months and so far I have had no issues it works and works extremely well you get that soft and creamy look to your images of course you need good lighting to get the effect. This filter will help take your images to the next level.

The filter is thin and lightweight which is great BUT due to it being so thin there has been a few times when I have struggled to get a good grip to unscrew the filter from my lens I have always gotten it off so this is not a game changer for me personally. With the filter on it is still 77mm so your lens cap/cover can still fit so you can leave it on if you want to when not using the camera.

Comes in a very nice stylish material case good stitching which gives this a professional look and feel, has magnet in the case which is used to close the lid/case these are all very nice touches.

Overall I am happy with the Black Diffusion Filter I feel it is a fair price and I would recommend it.

This filter really produces a fantastic dreamy effect that looks very cinematic. Build quality is excellent, it's beautifully machined from metal and the glass is thick and exudes quality. I'm using this mainly with stills but the effect looks so good I may start practicing my videography more. The threads are very smooth and it attached perfectly to my step-up adapter. It came with a really nice storage case too which was an unexpected but welcome bonus. Overall, this is a high quality filter that produces a fantastic effect and I'd recommend it to anyone looking for a more cinematic look to their stills and video.

So I just want to say right off the bat that I am a huge fan of K&f concept products. I've been doing photography for about 12 years or so and over the years I've gathered quite the plethora of photography and videography pieces of equipment and I have a lot of vintage filters that I really enjoy but for new digital stuff K&f concept are one of my favorite filters that I own. I actually have a lot of their entry level ones and also a few of their higher-end ones and this thing is absolutely phenomenal. The fit is spot on and these things slide on smooth as butter and it's very high in filter. The image clarity is amazing and the plethora of different effects that they have our top notch. Overall the functionality and ease of use of this one for the cool effects that it adds is awesome. Have gotten into doing Cinema style shots over the years and this thing is a must. The color accuracy is very spot on and also the look I'm going for is very spot on to what I'm going for. Overall 100% I say grab one of these if you're looking for a black diffusion. This filter is absolutely phenomenal. The materials they make these things out of our Top Notch and machine to perfection and the glass they use is top notch with very good Coatings and you can't really go wrong with these. They are a bit on the price of your side compared to some of the entry level stuff floating around on eBay and Amazon but they're 100% worth of money. Now if all you can afford is some of the cheaper entry level stuff I say go for that also because when I started out I only started out with some very very cheap gear and produce some very phenomenal results but just like a lot of people starting out I used to judge my own work very harshly but it made me strive to become better and better and now that I look back on some of the work I did when I started out it was actually extremely good and some of those pictures were once in a lifetime moments. Overall pretty much anything from these guys I highly recommend and if it's not too much more to save up for this it is 100% worth it

Excellent quality filter. The quality of the image is fantastic when properly used and exposed. I use this for long exposures with bright spots in the frame. It's particularly effective with light trails. The construction of the filter is high quality.