I recently got the K&F Concept 55mm Black Diffusion 1/8 Filter, and wow, it really takes my photography to the next level! As a beginner photographer, I wasn’t sure how much of a difference a diffusion filter would make, but this one subtly enhances my shots without overdoing it.

As a full-time photographer and part-time iPhone content wizard, I wasn’t expecting much when I decided to slap a diffusion filter onto my phone setup—but the K&F Concept 67mm Black Diffusion 1/8 Filter made me eat my doubts for breakfast.

First of all, the build quality? Solid. This thing feels like it belongs on a $3,000 cinema rig, not chilling on my smartphone via a filter adapter. K&F always delivers in that department, and this one’s no different. The slim 3.3mm frame is lightweight but doesn’t feel cheap, and it slips on and off without a fight (thank you, CNC non-slip design).

Now let’s talk look. The diffusion is subtle but so effective—skin looks smoother, highlights are tamed, and everything gets that soft, low-contrast, "did-you-shoot-this-on-film?" vibe. It gives me that dreamy haze without turning everything into a foggy mess. Perfect for those quick reels or talking-head videos where I want to look 10% more like a movie star and 30% less like someone who just rolled out of bed.

There’s no weird color shift (shoutout to the AGC optical glass with 87% transmittance), and I haven’t noticed any vignetting at all. Plus, it's easy to clean—huge bonus when you're constantly touching your gear with post-lunch fingers.

Bottom line: If you’re shooting content on your phone but want it to feel like you rented an A24 lighting package, this is a must. Add an adapter and thank me later.

Oh, and pro tip: make sure your lens thread is 67mm. Don’t be that person.

This filter offers a very light skin softening and blooming effect for cinematography and photography. The filter helps to make photography lenses not look as sharp and clinical without altering colors or creating other unwanted flaws in your images. I love this filter for fine art, and creative portraits.

Fits and works perfect on the Canon VCM lenses that just came out. I like the minor look addition of the black mist at 1/8 on those lenses. Just enough effect to do something but not be crazy noticeable.

It's nice that the filter comes with extras like the lens cap, and stuff.

The quality feels nice, and it fits without issues on all the 67mm lenses.

This filter is great; it gives that polished feel I was looking for in my photos. I appreciate everything it comes with, from the cloths to the lanyard so I don't lose it.

As a professional photographer, I've been buying from this brand for years, and it's always a great choice.

Pros

✔ Comes with a plastic hard case to safely store the lens
✔ Includes its own lens cap
✔ Unable to find any colour shifting, adorations or other artifacts from the lens
✔ High quality glass
✔ Takes the overexposure out of light sources, casing them in a more aesthetically pleasing manner
✔ Filter has these thoughtful thumb grips for screwing on/off your lens

Cons

✘ None I could find, love this filter

I ordered this 52mm 1/8 diffusion filter by brand K&F CONCEPT for my 23mm portrait lens, and while the term "Black Diffusion" or "Pro Mist" is usually an ideal created by the more premium filter brands, but I think it's a generic term that can be used by any brand, as this filter creates a nearly if not identical soft focus effect, for an equal value.

I have no issues with this filter; in fact it was ordered as a replacement for said more "premium" filter that broke. This brand matches the quality both in terms of effect it produces, and also the quality of the aluminum casing and glass itself, I honestly see no difference, and I have always loved this diffuse effect as it allows me to create a more "filmic" look to my images.

Product is equal in quality to brand names, and I will definitely be getting more of these for other lenses. 5 stars.

I attached this K&F Concept filter to my Sony FE 50mm f1.2 lens. I took a close portrait, and the I took the same shot without.

This filter softens the portrait. It’s quite subtle but it’s pleasant. It was an indoors portrait. I expect that there will be a more significant softening outdoors.

A lens cap and a lens cap keeper was supplied free. Unfortunately, to incorporate these two gifts, a bigger case was required—perhaps an 82mm size. The 72mm filter slides around inside. It won’t damage the filter, but I would have forgone the gifts for the correct box.

I have several K&F Black Mist filters of various sizes and intensities, and I honestly highly recommend them. If you enjoy night photography, it's practically a necessity, as it softens glare and gives a more harmonious visual result. In this case, being a 1/8 filter, the effect is more mystical than with the 1/4. Ideal for creating ethereal environments without going overboard.

As a nice touch, I like that it now comes with a lens cap and strap, as the first Black Mist I purchased from K&F didn't. This was a minor inconvenience, as I normally buy large filters to use with multiple lenses using adapter rings; therefore, I didn't have a cap of the appropriate size to protect it. In this case, Amazon Vine offered me the 58mm version, which I will primarily use with two lenses measuring 49 and 52mm. In the current version, they've corrected this drawback by adding the cap, and it's appreciated.

This is a fairly neutral or low-impact diffuser which helps to "blend" your camera image. It helps to reduce textures in the final image, so it's good for portraits where you might want to soften wrinkles in a person's face. Or, it can add slight blurring effect to landscapes.

It fits fine with the thread on my lens, and there's a variety of sizes to choose from. It affects the exposure slightly (as it's a darkening effect slightly), but with many cameras these days, there's automatic ways to compensate for this. It's easy to use.

I'm happy with this product.