I'm a beginner filmmaker with the dream of making my own documentary films about some deeper or darker subject matter, and this was the perfect filter to add the sort of dark texture I am looking for in much of my footage. I need to get a 1/8th as well for the 'less dramatic' scenes, but this is a fantastic filter set. My only wish is that I would have been smarter and bought the bigger filter and a set of step up rings so I could use it on any lens I may purchase in the future. I've got a couple of K&F filters and they are really great. I love the leather-like case that they come with as well. The entire package screams quality and I'll be buying the complete line of K&F filters as I add to my kit.

Everything about this was well made and executed. I love that the filter is so easily adjustable. I've been using a square slide in filter mount for years and while it works great, it's kind of a pain to have to carry a stack of filters and swap them out in the field.
The downside here is it's a fixed diameter, but I typically only use it for landscapes on my go to landscape lens so not really a big deal for what I do. I also really like the case it came in. It's a nice hard sided two-tone leather like case with a magnet closure. It's easy to slide into a bag or pocket but sturdy enough to keep it protected.
Adjustment of the ND stops is incredibly easy with the thumb bar. Overall, really great adjustable ND filter!

If you're like me, you can't get enough dark, misty, ethereal and foreboding atmospherics in your photos. Well, that's the look I'm going for when I use this black diffusion mist 1/4 filter from K&F Concept. The Variable ND2-400 filter comes along for the ride but the Black Diffusion Mist filter is clearly...err...'not so clearly'....star of the show.

I already had the K&F Black Mist 1/8 filter, which adds more of a dreamy and slightly otherworldly effect to photos. I shoot a lot of photos at night in cities, and the 1/8 filter is perfect for that scenario. Even at night, cities are bright but if you're shooting without this type of ambient light the 1/4 filter is the club you want to pull out of your bag. In some ways, both filters create an effect that evokes analog cameras. One of my favorite subjects is Southern Nevada and you can get some really cool images with these filters. I've used the 1/8 for shots in Las Vegas (spoiler alert: lots of lights there) but I'm looking forward to using the 1/4 to shoot in the desert or some of the more remote towns between there and Reno.

At one point, photographers would try all sorts of tricks to soften up their images. Rumor has it that 'Penthouse' publisher/photographer Bob Guccione would slather Vaseline on the lens to get the look--'The Gooch' thought he was a much better photographer than he really was but his obsession with soft focus imagery really differentiated his publication from the more lurid competition no matter how he went about getting the effect. Less messy photographers would go with black pantyhose over the lens.

I don't consider myself a serious photographer--I'm primarily a writer that started taking photos and videos to accompany content. I'm trying to learn more about photography and at some point when I have more time I'd like to get more into the artistic side of images. For now, however, I'm pretty content getting interesting photos/videos with my Nikon Z-30. I've started messing with filters to try some different effects.

As for these K&F filters, they're a perfect fit for my 50-250mm telephoto zoom lens. They apparently have little black particles inside the filter to get the black mist effect--in fact, you can see them if you look closely which you will because your first reaction is that it's dirty. I can't give you an expert analysis on the build quality, but the frame is anodized aluminum and that's a pretty burly metal. The glass has 28 layer multilevel coating and it comes with a nice storage case. I have enjoyed using my 1/8 K&F filter and I'm looking forward to putting the 1/4 through its paces. Highly recommended!

I've had and still have many K&F products, so I'm not surprised when it's this good. It always is. The packaging. The carrying case. Both look like they hold fine jewelry. Sharp-looking, with sturdy construction, and the result is absolutely amazing. Cuts down on all the harsh glare/reflection, and smoothes everything over. And so much better, being variable, than having to try multiple filters to get the desired effect. Love just being able to adjust it to where I want it. And, it works like magic. Thank you, K&F Concept

The built quality is amazing. I used it with several lenses using a step-down ring and it worked flawlessly with no issues whatsoever. I haven't noticed any weird colors in my pictures.

I use this on a set of Meike S35 lenses with a Black Magic Pocket Cinema Camera 6K - very pleased with the ability to change the picture results to be a little softer and dreamier - all while keeping weight down on a gimbal.

As a hobbyist photographer, this is admittedly an aspect I haven’t tried out yet, so there was a bit of a learning curve with getting to know how to use this filter. The fact that the adjustment is smooth and has no direct stops is probably good for someone more familiar with using these, but was a bit tricky for a new person. However, I love the effects you can get with this filter without taking up much space. It’s really nicely built so I’m not as worried about breaking it by accident, and the carrying case slips easily into a camera bag. All in all, getting to know how to use this filter has been a pleasant experience and I find it very worth it.

I recently got the K&F Concept 67mm Black Diffusion Mist 1 4 Effect & Variable ND2-400 (1-9 Stops) ND Lens Filter and it is incredible! This filter has adjustable levels of density, allowing me to get the exact effect I'm looking for. Not only that, but it's multi-coated with 28 layers of Nano-X Series and made with high-grade materials that feel sturdy.

price and quality are in line because you definitely get what you pay for so this is a great addition to my camera.

You will not find a single negative thing to say about these.
Perfection as usual from k and f