As with most K&F products, the build quality of this filter is quite good. The threads are smooth, the filter ring is powder coated and then the optics... well, hard to tell they're clear or anything as it's a diffusion/softening filter, but the image quality is still quite good. More about that later. The filter comes in a circular filter housing which is one of the cleanest filter housings I have ever seen! If they aren't already selling these as products, they honestly might be! There are raised dividing circles that allow you to fit filters of all sizes into the case, unlike most that have a foam cutout (which admittedly offers more padding). It would be nice if the filter housing had a little sticker stating what's basically on the box - "Nano-Series 52mm MRC Black Diffusion 1/4" in my case. In fact, the outer box has it listed a few different times , including twice on the sticker label... one on the case would be even better The optics look like clear glass with a few small gray dirt spots This is the intended design The effect it creates is a soft diffused glow ;a bloom effect.Using this black diffusion filter reduces contrast and overall it looks like a soft filter.But sharpness at the point of focus is not affected too much so they are used in portraiture as well as other creative photography Light sources bloom when looking through this filter I still find the 1/4 power very useful, while the 1/2 to 1 can be more of a niche.

Great filter for night street photography in well-lit situations. Street signs, lights, etc. Give your pictures a very nice, soft glow. During the day it gives a soft, cinematic touch. Not 100% on my lens but a very nice filter to have in your bag.

This filter does exactly what it claims to do. It provides a slightly softening, hazy effect that is more visible in certain lighting conditions, e.g. B. when you point at the sun during the golden hour. For me the effect is not as strong as I had hoped and so this has become a filter that I only get to use once infrequently, for very specific and rare situations. To describe the effect, I'd say think of the old look you see in cheesy Christmas movies where there's a scene with candles and there's a steamy, hazy glow around the flames. It's a subtle form of it. And yet, when used during the city's golden hour, it can add a dreamy effect to footage if you know what you're doing.

Actually more than I realized! Great company!

I was undecided whether to choose this product or some other more blatant brand. After trying it, I am very satisfied with the optical and constructive quality.

Glad I bought this K&F Concept Filter Black Diffusion 1/4 82mm filter, the effect in the videos is very pleasing and cinematic.

It's great I like the way it looks...would buy a lot more!

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.