This set comes in a really nice pouch that keeps everything safe and scratch-free. The pouch with everything in it is extremely light. It holds each piece in its own sleeve and packs away small enough to fit in your bag without issues. I don’t have any lenses that take an 82mm filter, but I do have filter rings for each lens. It’s nice to have a single set to keep in your bag like this. Using it on all my lenses, I don’t see any X pattern, and vignetting is nonexistent. The VND and the CPL are excellent. The colors stay true, and the filters work great. As for putting them on and taking them off, the magnets are strong enough to give confidence, but they come off easily with a little tug. I like that the CPL locks in place, and the VND will spin without moving the CPL. Another plus is that the VND has hard stops. I can’t speak much about the black diffusion filter, as I don’t like using that type of filter. I do love this set, and it goes everywhere with my cameras now.

In the past, I would sometimes let a photo slip through my fingers because it was just too much hassle to lug around different filters or fiddle with the lens. I mainly photograph expensive vehicles, and for that I always need a CPL filter, sometimes in combination with a black mist filter. My other passion is street photography, and I should have switched to this filter set much sooner (instead of buying my third or fourth flash ;-).

I'd say it's perfect for landscape, street, portrait, and product photographers and videographers… and for whom wouldn't it be suitable? I have no idea.

Fantastic set – highly recommended! The 77mm filter works very smoothly and can be positioned precisely, while the variable ND filter is ideal for quick exposure adjustments. The magnetic attachment is a huge plus: filters can be changed extremely quickly and stay securely in place. Image quality remains sharp, with hardly any color casts or vignetting. The included black mist filter provides beautiful, subtle highlights and a cinematic look. High-quality workmanship and a good case make it an absolute must-have.

This set is very useful when I take pictures during the day. I have lenses with 82 mm. So, this set of lens filters is sufficient for my needs. Having the magnetic connection makes the switches of filters so much easier for me. I love the ND filters. These filters allows to filters up from 2- 5 stops of light. It's sufficient for me to take pictures during the daytime with some level of shade. I like it that I can adjust the amount of light by twisting the control without removing the filters. That's the positive of ND filters.

I also love the CPL filter. It delivers crisp contrast and rich skies. The skies are no longer blown out. The VND and 1/4 black diffusion are good extras but i don't use them that much.

The build quality is good all around. They feel like metals. The filters don't get stuck. I like the magnetic cap as it's very handy and stays put, even when I put it in my camera bag.

I extensively tested this magnetic filter kit from K&F Concept (Nano-X series, 82mm) on my Sony A7 IV with the Sigma 24-70mm F2.8 DG DN II Art lens. Especially with this razor-sharp lens and the 33MP sensor, I was curious to see if the image quality would suffer – the result pleasantly surprised me.

Scope of Delivery & First Impressions

The set comes in very high-quality packaging. Included are:

* The magnetic base adapter ring.

* A variable ND filter (ND2-32) combined with a CPL (polarizing filter).

* A 1/4" Black Diffusion filter (for a "cinematic look").

* A magnetic metal lens cap.

* A high-quality storage pouch with a fabric look.

The Magnetic System in Use
Handling it on the Sigma 24-70 is a dream. You simply screw the adapter ring onto the 82mm thread once, and then the filters magnetically click into place.

* Speed: In "run and gun" situations with the A7 IV, this saves a tremendous amount of time. No screwing, no tilting.

* Secure hold: The magnets are very strong; the filters sit rock-solid on the lens.

Image quality & vignetting (with the Sigma 24-70mm II)
This was my biggest concern, but it proved unfounded:

* Sharpness: The image quality of the Sigma Art lens is fully preserved. Even when zooming in on the 33MP files, I couldn't detect any loss of sharpness.

* Vignetting at 24mm: Because the magnetic system is very thin, I didn't notice any distracting vignetting (edge ​​darkening), even at 24mm wide angle. This is often a problem with screw-in filters, but it's perfectly solved here.

* Color fidelity: The variable ND filter has no discernible "X-cross" effect and barely, if at all, distorts the Sony's colors.


* Color accuracy: The variable ND filter has no noticeable "X-cross" effect and barely, if at all, distorts the Sony's colors.

* The Look

* ND2-32 + CPL: The small orange grip is buttery smooth to use. Perfect for filming at wide apertures (f/2.8) and adhering to the shutter rule.

* Black Diffusion 1/4: Softens the "harshness" of the Sony's digital image. Highlights bloom slightly (halation), giving portraits and atmospheric shots an organic look.

The Bag

The bag isn't just a freebie; it's genuinely useful. It's divided (K&F Orange), protects the filters well, and can be attached to a belt with a loop.

Conclusion
Anyone using a high-quality camera setup like the A7 IV with G-Master or Sigma Art lenses shouldn't skimp on the glass in front of the lens. K&F Concept delivers professional quality here. The magnets significantly speed up the workflow.

A clear recommendation for all Sony shooters who want to professionalize their setup!

I am very impressed with this filter pack. I do both photography and videography with my Canon R5 so having a set where by simply stacking some filters I can go from polarizer to variable ND in one very nice case is very convenient. The filters themselves are well built and don't create a color cast. Well worth the money in my opinion.

I think these filters deserve nothing less than a 10 out of 10. Here's why:

• Starting with the visual and practical aspects, I really like the carrying case. It fits anywhere, you can wear it around your neck, and the filters are super protected inside.

• As for ease of use and assembly, being magnetic, they attach and detach in a couple of seconds, and the connection is incredibly secure. You can put them in precarious situations, and they'll still hold up perfectly.

• And in terms of quality, there's little I can add. Anyone who has tried other filters from this brand already knows they're among the best on the market. I didn't find even the slightest vignetting in the ND filters, even at their darkest settings, and the Black Mist, which I'd never tried before, pleasantly surprised me. The dreamy effect has a touch that's very difficult to achieve in post-production, yet it maintains all its sharpness.

•In summary, great job those who have done with these filters, to this day for my needs, they are the best I have been able to try.

Very easy to use thanks to the magnetic mounting ring, which makes attaching and removing the filter quick and simple. Adjusting the stops is smooth, and the compact size makes it convenient to keep in my camera bag. A well-designed and practical filter.

This kit provides just about everything you need in filters for your camera/lens setup. Perhaps the only thing missing is a UV but these are often much lower in cost compared to the filters in this kit. The magnetic quick-change system is a significant workflow accelerator. This design drastically cuts down on setup and swapping filters. K&F makes filters at different price points and these are some of their better class of filters. The VND is my most used of this kit, followed by the CPL with the Black Mist only used occasionally. I have looked at other offerings from other manufacturers and they are much higher priced than this kit. For my money K&F makes the best value filters no matter what your budget is.

Extremely and pleasantly surprised by the quality and finish of this magnetic ND filter kit.

The magnetic ring screws easily onto the lens, and then the filters attach instantly via magnets: it's simple, quick, and very effective in the field.

The small carrying case provided is really attractive, well-designed, and very well-made, inspiring confidence as soon as you open it.
The filters are of excellent quality, with a fine and precise design. The whole kit exudes quality and attention to detail.

The magnet is strong enough to hold the filter perfectly in place while remaining easy to remove.
Special mention goes to the magnetic lens cover, which is very practical for protecting the lens when a filter is attached.

A kit that is aesthetically pleasing, practical, and high-quality. I highly recommend it!