This an absolutely beautiful filter. I picked up the 1/4 and 1/8 filters and they are wonderful. They add a great dreamy haze to your images giving them a great cinematic effect.

The cases are also some of the best filter cases I have ever seen. They are nice "leather?" with pretty nice strap system to lift the filter out of the case without getting your grubby little fingers on them

This is a great camera lens diffuser. And also a very effective camera lens protector.

First off, the way that this arrives, packaged in a very fancy case and wrapped in a very protective cover... is just incredible. The case is so nice, it makes we want to take it off and store it.

The function is spot-on. The diffusing is subtle but noticeable. Which is great. The look is awesome as its mounted on the camera. The threads are clean and screw right on.

I am VERY happy with the quality of this diffuser.

I recently added this K&F Concept 67mm Ultra Low Reflectivity/MCUV protecting filter to my photography gear, and it's proven itself to be an excellent asset.

This dual-purpose filter provides an invaluable extra layer of protection for my camera lens. Whether I'm shooting outdoors in varied weather conditions or just trying to keep dust and scratches at bay, this filter adds a reassuring safeguard without compromising image quality. It effectively combines MCUV capabilities with ultra low reflectivity, providing crisp and clear images by minimizing haze and cutting down on unwanted reflections.

One of the standout aspects of this filter is its sophisticated nanocoating. The ultra low reflectivity technology ensures that glare and reflections are kept to a minimum, maintaining the natural color balance and contrast in my photos. This feature is particularly beneficial when shooting in challenging lighting conditions, as it enhances image clarity without altering the scene's original look.

I also appreciate the filter's included protective case, which is versatile enough to accommodate various filter sizes. This flexibility is a fantastic convenience for photographers who use multiple lenses and filters and want to keep their gear well-organized and protected during travel.

Moreover, the Nano-X line's renowned build quality is evident. The filter is sturdy yet lightweight, making it a practical addition that doesn't add unnecessary weight to my setup. The water and oil-resistant nanocoating is a blessing for easy maintenance, especially during outdoor shoots.

In conclusion, this filter is a remarkable choice for anyone looking to protect their lenses while enhancing photographic clarity. It’s a worthwhile investment for both amateur and professional photographers who demand the best from their equipment, or if you are just looking to keep your expensive lenses staying nice.

77 mm lens filter ring from KNF concept. Another high-quality item from this brand which I’ve trusted for over five years now for all sorts of my camera accessories. The optical quality is flawless and the threads on the filter screw in super smoothly. This filter is a perfect middle ground option for Any videographer whether entry-level or more advanced. The price is right and I have honestly no complaints and easily recommend this filter with no reservations.

Let me preface this review by explaining how I use these filters. I’m a wedding photographer and my wife is often my second photographer. I shoot Sony and she shoots Fuji. We also shoot wildlife and landscapes. Between the two of us I have purchased 23 K&F lens filters. Since we are working photographers, and rely heavily on our equipment, this UV filters are pretty important. I have had 3 lens front elements saved by UV filters, and because of that they have been worth it. These have been situations where a lens was dropped during a switch and landed on its UV filter, a cat pulled down a camera strap and the camera and lens landed right on its UV filter and another incident where I was taking a group photo in a church and my slung camera hit a corner of a chair’s back rest. These are all situations where the UV filter saved the lens. In all situations I was able to unthread the filter, pick up the glass shards and keep shooting. The first two situations the lens hood actually broke too, and in the chair corner situation, the corner was at a perfect angle to fit right in and get the lens filter.

There have also been situations where I’m shooting in the rain, or near a fountain and I can just wipe water off the front lens element with a microfiber cloth without needing to take them time and very carefully clean it.

Regarding this specific UV filter, it lives on a Fuji 35mm f2, and is thin enough to match the small lens body. It’s super low reflectivity means that it’s very hard to put it in situations where it has any effect on the image. Basically, it’s there for protection and has a near zero effect on image quality. Nothing more to ask for!

I’m including photos of portraits of my Kitten where she is directly backlit and another where the sun is just next to her. These were both shot a the Fuji 35mm’s maximum aperture of f2. In the photos where the sun is just to the side of the subject you can see purple blobs that are not present in photos without the filter. It was actually very challenging to get these purple blobs! I had to shoot a ton of photos into the sun, and the purple blobs were only present in very narrow angles. I’m not seeing any haze or loss of contrast and the only downside to this filter is those very hard to create purple blobs.

There are filters that you simply screw on and then forget. And there are some where you notice from the very first look through the lens: Something is happening with the image. It was exactly like that when I held the new 77 mm Black Mist 1/4 from K&F Concept in my hand — another filter for my manual video lenses on Micro Four Thirds, on both the GH6 and Blackmagic Pocket 4K. I was able to test it through the Amazon Vine program. The price was 135.99 euros in August 2025.

As usual from the manufacturer: brass socket, strong thread, no wobbling. I already have a number of ND filters and chargers from K&F Concept, and the manufacturing quality has always been at a level where you don't have to think twice about whether it will last. Unscrewing and unscrewing is as smooth as butter, even if you have to change the setup quickly on the go.

Black Mist — and why 1/4 works differently
The Black Mist function is not a gimmick for me. It removes this sometimes merciless sharpness from digital cameras, reduces skin blemishes and gives highlights that subtle, cinematic glow. I already have the 1/8 model, which is much more subtle. The new 1/4 looks stronger — especially in night photography or videos with selective light sources, the glow is more visible. In daylight, very bright scenes can look almost too soft, so I asked myself once or twice if that wasn't too much of a good thing when it came to landscapes.

I was pleasantly surprised by the very low tendency to reflect. Even backlight situations where other filters produce unsightly ghost images remain clean here. At the same time, however, you notice that the stronger diffusion effect can easily blur fine structures in architectural photographs — i.e. use them more carefully for documentary work.

In direct comparison to the 1/8 model, the 1/4 looks livelier, almost bolder. He brings a bit more “drama” into the picture. When shooting in a small bar with dim lights, he immediately gave me the feeling that I needed to rework less in post-production. In brighter outdoor shots, the effect is more present, which is not always intended.

My personal review
A high-quality tool that noticeably changes images. For creative video and portrait work, the 1/4 Black Mist is a powerful option, while the 1/8 remains the more discreet choice. I'll probably keep them both in my backpack — depending on how bold I want the picture to look.

I got this to protect my Sigma 150-600mm lens, and the 95mm filter fits it perfectly. The filter has some heft to it and appears to be made very well, with very good materials. I only took a few photos with it, but I didn't notice any real difference in my photos with the filter on, but I know it will do a good job protecting my lens.

It doesn't seem to impact image quality beyond what it's supposed to impact (a mist filter, you know, adds a misty look to the photo). You'll need an extra stop or so of lighting due to the brightness change. It's a good fit on 72mm lenses like my Canons, and it's easy to add and remove.

Perfect filter. Essential to protecting the front glass on your lens. This filter does not affect the natural flaring of the lens and it's very low profile and lightweight! This is a must have for any photographer! Great filter quality like the rest of my k&f filters. 10/10 recommend

Excelente