







✨ Elevate your lens game with silky smooth diffusion—because your shots deserve the glow-up! 📸
The K&F Concept 49mm Black Diffusion 1/4 Filter from the Nano-K Series is a precision-engineered lens filter designed to soften highlights and reduce glare while maintaining natural skin tones. Featuring HD AGC optical glass and an 18-layer nano-coating, it offers superior color fidelity and robust protection against dust, water, and mildew. Its ultra-thin aircraft-grade aluminum frame prevents vignetting, ensuring edge-to-edge clarity. Ideal for professional photographers seeking a soft glow effect with durable, high-performance optics.



| Package Dimensions L x W x H | 16.4 x 10.3 x 3.3 centimetres |
| Package Weight | 0.06 Kilograms |
| Product Dimensions L x W x H | 49 x 49 x 1 millimetres |
| Brand | K&F CONCEPT |
| Part number | KF01.2134V1 |
| Size | 49MM |
| Water Resistance Level | Waterproof |
| Photo Filter Effect Type | Diffusion |
| Focus type | Fix Focus |
| Style | 1/4 Black diffusion filter |
| Photo Filter Thread Size | 49 Millimetres |
| Guaranteed software updates until | unknown |
R**R
Add that vintage effect
I really like this filter. I chose the 1:8 as I feel it’s enough on my x100vi. It screws on well and it’s a nice fit, there is no colour cast to my images and the only degrading happening is the one you bought the filter for, that is to reduce clarity and add a nice halo on lighting. I keep this on my camera 100% of the time and it’s cheap enough that should it get damaged, I can justify ordering a new one. Great value for money.
M**A
Brilliant filter
I love this little filter. I use it on my Fujifilm x100s , fits perfectly and it gives a very subtle dreamlike quality but you’re not too far into looking like you’re in a haze. Great quality, I mostly keep this on 100% of the time now for all types of lighting. Doesn’t effect colours and has the bonus advantage of acting like a lens protector.
M**P
Good filters but get a green halo, excellent customer service
Hi, I ordered both 1/8 and 1/4 strength filters. These filter are good for the price, I have quite a few K&F filters and have always been happy with them. I did notice a green halo effect on quite a few of my night time shots when using them. I know that this series of filters is their lowest price range and they are excellent value for money but I was a bit disappointed with the halo effect so I contacted their customer service who were very helpful and efficient and offered me a £25 refund to use on purchasing one of the Nano-X series. These filters are by no mean bad and your mileage may vary but be aware and maybe consider buying their Nano-X series instead if you can. In fairness ,K&F make very nice quality filters and this is the first time I've had any sort of issue with them.
W**H
Cinematic photos - a must!
Great little filter. I use this to get a more cinematic look on my photos. It is of good quality and clarity, it easily screws onto your lens. It came with a nice case to store and some cleaning cloths.
S**H
High quality - great value!
This is great value in my humble, beginner opinion!Introduces a nice bloom effect with a decent light source. Build quality is of high standard and the glass is quality as well!I would say this is a bit more than 10%, but does the job very well either way.Shots taken on my new Fuji X100vi
C**Y
Did its job. Decent price
Did its job. Decent price
E**T
K&F quality and budget price!
Great high quality filter, creates really nice highlight blooms without adding other artefacts or too much softness. Use a lot on professional shoots, well worth the price compared with other brands 4x the price!
J**E
Very sharp for the price
Pretty damn sharp, even though it's as big as 67mm - including on my 250mm telephoto. Adds a very very subtle glow that I can play around with in photoshop. I like it - much MUCH more noticeable at night with lights like headlights and the such.
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