I've recently been getting into photography more and enjoying the ways that filters help create that artistic possibility. These diffusion filters help create a subtle but effective difference during the day and a strong difference for night photography. K&F is a solid company that I have some other filters from and they all hold up in quality! This 1/4 filter creates fairly strong softening in the highlights and allows for very dreamy photos where you would otherwise end up with harsh, digital light flares. I have been recommending that in addition to an ND filter, people should add a diffusion filter or two to their collection. This brand seems like a great company to get multiple, trustworthy filters at a great price.
12/10/2025
My 135mm and 40mm Sigma Art lenses are extremely sharp. Some would say clinically sharp, maybe too sharp for portraits. My personal experience has been that’s not always the case, but I sometimes find myself wishing I could dial them back slightly. This K&F Concept Black Diffusion 1/4 filter does just that, almost like magic.
The effect is subtly-different from applying a similar effect in software. I like that the effect with the filter on the lens is noticeable, but without being too obvious. It’s an excellent compromise that seems to work well for me. Deciding precisely when to use this filter will be an ongoing learning experience that I’m looking forward to.
One thing worth noting is that the effect when on the 135mm lens is not exactly the same as when on the 40mm lens. That might be one reason for the different strength options.
Physically, there’s a lot to like. Construction is solid, the fit is precise and the coating is doing its job. A solid five stars for function, quality and value at the current price.
The effect is subtly-different from applying a similar effect in software. I like that the effect with the filter on the lens is noticeable, but without being too obvious. It’s an excellent compromise that seems to work well for me. Deciding precisely when to use this filter will be an ongoing learning experience that I’m looking forward to.
One thing worth noting is that the effect when on the 135mm lens is not exactly the same as when on the 40mm lens. That might be one reason for the different strength options.
Physically, there’s a lot to like. Construction is solid, the fit is precise and the coating is doing its job. A solid five stars for function, quality and value at the current price.
11/10/2025
Not going to lie, I look like an idiot buying this filter -- and you likely will too. I spent hours watching youtube videos to find the sharpest lenses possible on a budget, only to spend more money to make that lens less sharp. However, I'm a sucker for trends, including the popularity of film photography and the accompanying halation. The filter adds a nice element to night urban photography, especially the bright lights. It's a look that -- as far as I know -- can't be created in digital editing. I've bought a few other cheaper black mist style filters for my point & shoot cameras, but this is the first quality filter I picked up for my "real" camera. I went with K&F because I've always been happy with their quality/cost balance. This filter is no exception. The diffusion is pleasant and consistent across the image. The filter is thin, and it screws on to my step-up ring easily. It also comes with a nice case. Overall I will enjoy adding this to my tool bag.
08/10/2025
K&F Concepts does it again! Watch video for details. 1/4 is the perfect filter for that dreamy look.. not to much and not to little.. it.s just right.. This filter will take the edge of the crisp video look to your films and will give a nice glow to highlights and softens the color blacks as well.. great filter... I love it.
07/10/2025
This filter produces a very subtle cinematic look while blurring and softening still images and moving video. When it comes to shooting individuals, there is a discernible difference, even though it is not a significant one.
It makes the skin somewhat supple and silky, and the backgrounds are not as razor-sharp as before, especially with my Sony A7IV. I got the 82mm size with step-down rings to use it on all my lenses.
Overall, having this filter in your camera bag is a good idea, but it is beneficial if you take portrait photos or want a softer touch with your videos.
It makes the skin somewhat supple and silky, and the backgrounds are not as razor-sharp as before, especially with my Sony A7IV. I got the 82mm size with step-down rings to use it on all my lenses.
Overall, having this filter in your camera bag is a good idea, but it is beneficial if you take portrait photos or want a softer touch with your videos.
06/10/2025
Outstanding quality. Just the right amount of softness for a 录 black diffusion. Superior filter box.
This ¼ black diffusion filter from K&F is a very high quality optical filter that provides a subtle but noticeable amount of softening to your photos which renders skin tones with a beautiful softness that doesn't look fake. Highlights have a soft glow/bloom and the overall contrast is slightly reduced.
Unfortunately there is no industry standard on exactly how much diffusion a ⅛, ¼, ½ filter should give the image so each manufacturer decides for himself how much diffusion to add to each filter in their line. I like how much diffusion K&F have put on this filter as opposed to other manufacturers whose ¼ diffusion filters apply too much diffusion.
Another indicator of quality is the plastic boxes K&F decided to provide with their filters. They are superior to other companies' boxes and a pleasure to use. I have two different styles of boxes from K&F and they are both outstanding.
Unfortunately there is no industry standard on exactly how much diffusion a ⅛, ¼, ½ filter should give the image so each manufacturer decides for himself how much diffusion to add to each filter in their line. I like how much diffusion K&F have put on this filter as opposed to other manufacturers whose ¼ diffusion filters apply too much diffusion.
Another indicator of quality is the plastic boxes K&F decided to provide with their filters. They are superior to other companies' boxes and a pleasure to use. I have two different styles of boxes from K&F and they are both outstanding.
06/10/2025
I own around a dozen different filters developed by K&F and I'm a big fan of their UV filters in particular. If you know, you know. I've only recently become aware that they are offering FX filters, so I was very excited to try this. Friends: this filter works. Period. Not only does it add a nice haloing effect to your subject's faces, but it uniformly softens textures throughout the image. Why is that a big deal? Because as we enter grad portrait season, this filter eases the effort of performing touch ups to acne and scars. Rather than endlessly tuning masking and fixes with blotchy results, this filter cuts that workload in half, while your edits remain consistent with the rest of the unedited image. This simple filter is a game-changer!
02/10/2025
A long time ago I bought a Super VHS camcorder, and first thing, recorded my parents. I plugged it in to the TV and played it back. My mother said "That's no good." I asked why. Her response was, "The picture is too clear. Who wants to see themselves that clearly?"
Zoom ahead around 40 years and I have a Nikon full frame DSLR. Take a picture of someone from across the room, and you can see every pore. That's really not necessary.
Enter the diffusion lens.
This one is built beautifully. The glass is almost invisible, and the ring is sturdy and has ridges for easy gripping. And the storage case is nice, too.
It's a 1.4 diffusion filter, so the effect is subtle. But it is there, and it works.
Great filter at a good price.
Zoom ahead around 40 years and I have a Nikon full frame DSLR. Take a picture of someone from across the room, and you can see every pore. That's really not necessary.
Enter the diffusion lens.
This one is built beautifully. The glass is almost invisible, and the ring is sturdy and has ridges for easy gripping. And the storage case is nice, too.
It's a 1.4 diffusion filter, so the effect is subtle. But it is there, and it works.
Great filter at a good price.
01/10/2025
Just used this for the first time on a corporate interview style shoot a few days ago, on an older subject who was concerned about their appearance on-camera. I have nice lenses that are VERY sharp, and tend to pick up and accentuate every tiny detail. The 1/4 strength was perfect for proving just a bit of flattering softness, without losing sharpness or contrast or looking overly "glowy."
I won't use this for every shoot, but to add a bit of character or softness to portraits, certain interviews, wedding footage, etc., it hits the mark.
Quality is top notch. Smooth threading on and off my lens, comes well padded in an appropriately sized case. I have a full set of big name Black Pro Mist filters, and these are every bit as good.
Would recommend these without hesitation!
I won't use this for every shoot, but to add a bit of character or softness to portraits, certain interviews, wedding footage, etc., it hits the mark.
Quality is top notch. Smooth threading on and off my lens, comes well padded in an appropriately sized case. I have a full set of big name Black Pro Mist filters, and these are every bit as good.
Would recommend these without hesitation!
27/09/2025
Have a lot of K&F filters - really, a LOT of filters in general - and this one is good quality with a solid plastic case.
1/4 is subtle, perhaps too subtle for some things and so I never bought one before. I could see using this more because of that.
1/4 is subtle, perhaps too subtle for some things and so I never bought one before. I could see using this more because of that.
25/09/2025