I have worked with K&F Concept filters in the past and generally had good experiences with them. They're good, mid-range quality filters at (usually) a budget price. I haven't worked with any black diffusion filters prior to this one so I have no basis against which to compare, but so far it seems to work as designed and seems to be made very well.

In a nutshell, this type of filter softens light a bit, causing some gentle halos around light sources, without impacting image sharpness or detail. Where I have seen the most noticeable impact is in images where there otherwise would be a lot of shadows and contrast; instead of stark contrast and strong shadows, the filter has the effect of brightening up the shadows somewhat and creating smoother color gradients. Sure, this can be done in software after the fact, but it is a lot easier to do this at the time the image is taken and it certainly is a lot less work.

The filter is very easy to install. This is my first magnetic filter and it is as easy to attach to my camera as I could have hoped. The threaded ring attaches to the lens in the same manner as a step ring or another filter, and the filter itself just snaps securely into place due to the magnetics. Removing the filter is just as simple, especially if you choose to leave the magnetic ring in place on the lens.

The assembly seems to be well made. I have had filters in the past that have been poorly constructed and rattle in the frames when shaken, or have been mildly blemished, or just felt cheap. This filter has none of those issues and appears to be well made.

This is a nice black diffusion filter. It's easy to install and use, and it just works. I will be using it more in the coming weeks.

Please note that a 1/4 diffusion filter is a fairly strong diffuser, so make sure that you want that level of softening for your shots.

If so, this is a great option at this price point. The build quality feels solid, and I did not see any flaws in the optics. The magnetic attachment between the ring (which screws in as normal), the filter, and the lens cap works surprisingly well. I wish this were universal, although if your camera takes a lot of abuse I would still go with the traditional screw-in filters. A good smack will dislodge everything.

Would recommend 100%

An ID card! As it softens the lights, it gives it an incredible vintage touch.

I am generally satisfied with this K&F model, which allows you to dim the light sources at night and create a comfortable atmosphere during the day. I use it with an Xpro-1 that does a combo with a silver rendering for a digital camera.

Finally a filter that gives softness to my images without neglecting the details. It even corrects small imperfections in the foreground without sacrificing image quality.

Super glad I found this and saved money as I was originally going to buy the Tiffen filter. It has worked well for me and I am very happy with the results it gives!

Order received on time. More than the right packaging. As for the equipment in particular...it does the job very well. It is truly essential equipment for those who want to soften their digital photo rendering. I can't wait to test it in portrait photography

Really nice quality filter, comparable to more expensive brands. Got that black pro nebula look. Softens things and gives the light a bit of a glow. The 1/4 does enough, but I'm curious to play with the more powerful versions as well.

I've seen various films that noted the use of diffusers. I really compared a lot of black matte filters. This one is perfect. I get the softening without noticing it. This is really a high quality filter. I am very happy with it.