EDIT:
The seller contacted me and resolved my initial issue by sending me the CPL compatible with my kit. I'm very pleasantly surprised by the time they dedicated to me and how effectively they resolved my problem.

They also explained that the size difference (larger diameter) is to minimize vignetting. K&F's customer service has transformed my experience into a positive one and demonstrated that they are definitely serious, offering highly competent products at very competitive prices.

Thank you, K&F.

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I bought this second kit because I already had another identical K&F Concept Nano-X magnetic kit, hoping to create a single ecosystem of interchangeable filters. Unfortunately, that's not the case. Although both products are 82mm and belong to the same magnetic line from the brand, they are not compatible with each other.

To make matters worse, the cases, boxes, and even the product line name (Nano-X Series) are identical, reinforcing the idea that they should work within the same system. However, the filters don't fit, the magnets don't match, and even the 82mm magnetic caps are different sizes and incompatible.

Given that the two products are so identical, I think it would be appropriate to clarify that they are not compatible to avoid confusion and bad experiences like this one.

If you already own another K&F magnetic kit, be careful: it may not be compatible with this one, even if they are from the same product line.

For example, I only needed the CPL filter, which didn't come with the first kit I bought, and buying it separately costs €90 versus €130 for the kit. That's why I opted for the second kit, but it didn't work out.

Photo 2 shows the different thicknesses of the adapter rings.
Photo 3 shows the size difference between the two caps, both 82mm.

Video of the dimensional inconsistencies, both 82mm kits.

I always get nervous with very expensive things adhered with just magnets, but so far I've had absolutely no issues with these filters staying put on my Canon RF70-200mm. They get knocked around quite a bit in my bags or during lens swaps, and I haven't had any come dislodged in any meaningful way.

They're expensive, probably too expensive for my taste, but they're good filters and it is handy to be able to swap them out quickly. I haven't noticed any issues with image quality, which is the very least you could hope to say at this price point for this glass.

An incredibly practical and efficient set.

The magnetic attachment is very effective and so convenient!
The magnetic cap stays firmly in place and protects the lens well.

The cap is very easy to remove, allowing you to then attach the ND or myst filter.

- The ND filter is graduated, which is a real plus for fine-tuning its level.

I didn't notice any significant chromatic aberration.

- The myst filter is subtle yet very effective, without causing excessive halos.

The filters are very well finished, with high-quality orange anodized aluminum inserts.

Everything is neatly stored in a handy little carrying case.

Excellent value for money.

I ABSOLUTELY LOVE this filter set! It is high quality, works really well, and is also very good looking.

Pros:
- The quality of the filters is very good
- The magnets are very strong. I don't worry at all about the filters falling off of each other
- Adding and removing any of the filters is extremely easy, especially when you compare it to the traditional screw on method
- Despite all of the filters in the kit being magnetic, they also include regular filter threads so these can still be used in conjunction with normal filters
- The inclusion of a magnetic lens cap is a really nice touch
- The carrying case that these come in is well built, well designed, and includes a belt loop so you can easily carry these filters with you

Cons:
- The price will likely be a bit high for a lot of people. Do I think it is good value for money? Definitely. But $160 is still a good chunk of change
- The orange color accents might be a turn off for some

I wanted a "cinema mist effect" for my a6700 – mainly for videography. For video, an ND filter is essential...

So, for the best solution, I looked for a system that could be stacked. Initially, I was a bit skeptical whether magnets would work well – but lo and behold, it's rock solid (perhaps too solid? Time will tell). The ND filter adjusts very smoothly and doesn't slip. Perfect! With the mist filter, beautiful lighting effects and the cinematic look I wanted come through perfectly.

I've included a short video where, based on the sound, I think you can clearly hear how smoothly the magnet engages (please ignore my dog's pawing in the background).

I've also included some sample photos taken with the a6700 and Tamron 17-70 f2.8.


A quick explanation of the image order:

1. Image completely without a filter

2. Image with only a Mist filter

3. Image close-up without a filter

4. Image close-up with only a Mist filter

5. Image with an ND filter
6. Image with an ND filter + Mist filter

7. Image with an ND filter as a close-up

8. Image with an ND filter + Mist filter as a close-up

Conclusion:

The quality of K&F filters is, as always, fantastic. They are CNC-machined parts, aren't they?!

It's always the same aesthetic effect, like with those smartphones with the Apple logo. Oddly enough, people always find these orange K&F filters stylish and comment on them – just a little anecdote.

Definitely a perfect system that will replace my simple ND filter!

This was really nice to use. Had a little bit of vignetting though, not sure how that could happen because the filters themselves are wider than the barrel due to the magnetic adapter. good news is i think they add to the types of images and videos i capture, though i kinda want the option to do that in editing instead of baking it into the image and living with it. you can kind of correct it the other way in post too, and honestly it's really not that bad. could be my lens too. I did have some struggles with changing my CPL because it's stiff enough to start unscrewing the threads. I didn't notice any X patterns or anything like that, so i think it's pretty good. The lens cap is aluminum, and you have to use it when you use these. I love kf cases too, they're always made of cool materials, and they fold up super small to fit anywhere.

Canon introduced a new mounting system with the release of their Mirrorless cameras. However, this didn't make all those expensive lenses you already had obsolete - they just need an adapter.

A neat feature of these adapters is the ability to "slide" a filter in between the back of the lens and the sensor. Seems easier to carry, and most importantly you don't need to switch filters onto different lenses... as long as they are using the old mount.

Well when you get some of the new mount lenses in your collection, you run into a problem: those drop-in filters don't work with the new lenses. So now what?

This magnetic system provides the versatility of a drop in filter, but works on ALL your lenses. The magnetic attachment points are strong: there is no fear anything is going do fall off, regardless of your shooting angle. And it is incredibly easy to swap filters - easier than those drop ins. And, unlike the drop ins, you don't need to expose your sense to the open air- everything stays sealed up and protected.

Depending on the lenses you use, it is possible to use these same filters on different diameters. If you have some 82mm and some 77mm - just but a step-up ring and you are good to go.

Aside from.the functionality and ease of access, the filters themselves are phenomenal. From the clarity of the images you get through this glass, to the robust and smooth feeling of the rotation mechanism, these do not disappoint.

And you get all this for cheaper than a single Canon drop-in kit.

These are really nice, and they can bring efficiency to your workflow: no more screwing and unscrewing threads to get the perfect shot- just snap a different filter on!

Great quality. Very light and durable. Easy to use! Really good functionality and easy the adjust the filter.

Used k&F all the time

K&F makes quality products I just wish I had bought these sooner. My only wish is that they made a ring lens cap combo that you could buy separate so you could quick swap with multiple lenes while on a shoot.