The packaging of the polarization filter already gives the impression of a higher quality product. The filter is housed in a well-made and elegant bag made of synthetic material and leather with a magnetic closure. This offers good protection against scratches. However, there is no reinforcement against point loads or bending. A loop makes it easier to remove the filter.

The filter is very well made, which shows on the one hand on the filter thread and on the other hand on the glass. Due to the precise manufacture, the filter can be screwed onto the lens very well and without snagging or tilting, as is often the case with inexpensive filters. The glass shows no distortion or distortion whatsoever.

The filter is a bit difficult to turn, but defined and even - best described as viscous resistance. Thanks to the non-slip ribbing of the filter, twisting is still possible. Here you just have to be careful not to loosen the filter, which is why I deduct a star. I rotated the filter frequently for the test to overcome any initial wear and to make the rotation smoother. However, this is always only a short-term effect.

Photographically, the polarizing filter does what it is supposed to do. There are enough blogs here for a holistic overview, … . In my opinion, at least in the field of landscape photography, the most important filter. Therefore, I would recommend buying a good filter here. Especially now in autumn the colors of the wet forests really come into their own.
I could not find any negative impact on the image quality on my Nikon D850 and Nikkor 24-70mm F2.8 lens. So full points in terms of image quality.

There is a new filter system from K&F. As usual, it comes with a high-quality leather case. The material in beige is made of suede, while the body is made of gray fabric. The CPL filter is stored here well protected.

After unpacking, the ultra-thin frame is immediately noticeable. The weight is clearly noticeable. There is no plastic processed here. The brass frame itself is incredibly thin. It can be screwed and fixed very well to the lens. Dark corners when taking photos are definitely avoided. Nothing wobbles or wobbles. The seat is incredibly stable.

The product is also convincing in practice. Polarized light elimination is extremely good. In landscape photography, the difference is clearly noticeable. In addition, I have the feeling that the color contrast is greatly increased. It is waterproof, anti-scratch and provided with HD. Familiarization with filter photography is very worthwhile.

Exquisite workmanship in lens and packaging. An ideal gift for all photography lovers!

I shoot professional gear and I don't mind paying for products that deliver top quality results, are durable and easy to use. This filter meets my criteria for a professional photo product.

The optics are of high quality. I don't see any aberrations in the resulting images. Mechanically, the movement of the filter is very smooth. We'll see how it fares with some weather and dirt, but I expect it will continue to perform well. I pit this against the very best I've used and never look back. This company has made an excellent professional quality filter.

I received the polarizing filter for free as part of the Vine program to test. Since mine from another manufacturer is already getting on in years and does not fit my most used lens, I was happy about it.

Even the packaging is very high quality and the supplied bag is very well thought out and easy to handle. You can even make a pretty frame out of the packaging.
A microfiber cloth for cleaning is also included.

The filter does a good job removing annoying reflections and enhancing the colors in the image (green from the grass, blue from the sky and also white against a blue sky). For this reason, the filter is great for landscape photography. Naturally, the polarization filter reduces the light by up to several f-stops. However, this must generally be taken into account when using such filters. However, this is not a problem, especially when taking landscape photos with a tripod.

The filter was inexplicably stuck (couldn't find any handling error or wedging) on ​​the lens when first used. That's why I only gave it two stars in the rating. He also does not use force to remove. It could only be removed again using a special tool from a third-party provider. After that I changed the rating to 5 stars. Because the filter lost some color on the frame when I tried it without special tools, but it held up great and still worked great. Now and then I can't get it off when using it. But after I screwed something on the adjustment ring for the polarizing filter, it then came off again. Just not without problems. That's why I'm correcting my rating again! 4 stars this time. It's still a mystery to me why this works. You can hardly grab it because the back ring is so narrow that you can't grab it with your bare hands. In my opinion a design flaw!
This high-quality filter offers good value for money.

I've been a fan of K&F Concept for a long time and own many filters. Especially at the beginning, the cheap products were a real blessing for my wallet. I just couldn't afford expensive polarizing filters, ND filters or adapters. However, with this filter series, they impressively demonstrate that the K&F Concept can also be of absolutely high quality.

I can report that just unpacking the filters is a real pleasure. Although this does not count directly in the rating, it immediately conveys a completely different feeling than with the other product series of the brand. It continues with a very attractive and haptically convincing case, which allows the filter to be removed via a tab.

But now to the filter itself. I already have a few polarizing filters in use, but none of these filters really convinced me as much as the Nano-X PRO. The processing is simply top-notch, the weight feels good in your hand and the thread is fun - when screwing it on and even when unscrewing it again. Most of you will know that cheap filters like to stay in place. The optical performance, which ultimately matters, is great. Reflections are skilfully filtered and there is no falsification of the actual image. The look that emerges is simply great. If a little magic is then done in post-processing, photos of cars just look great, a completely different level. So I can give my recommendation without hesitation.

The K&F Concept filter arrives safely packed here. It comes with a duster and a storage bag.

The processing of the filter is really first class. High-quality materials, great handling, a perfect fit and not too heavy on the lens or in the hand.

The filter is simply attached to the lens using a rotating mechanism.

The filter conjures up wonderful images that no longer have to be reworked.

The price is certainly a deterrent - but in my opinion you get one of the best filters on the market. Professionals MUST strike, amateur photographers CAN strike without hesitation

The K&F Concept Nano-X PRO series polarizing filter arrived quickly.

The packaging alone is a feast for the eyes.
The box in black gold. Very high quality. And also sustainable. the packaging can be used as a picture frame. A small piece of cardboard is included, which acts as a stand.
Really great idea.

Then the pencil case. Nice material, with fabric and leather. Really well made.
There is a small tab on the side to get the filter out of the pencil case.
A cleaning cloth is also included.

The filter itself is also of very good quality. Very high quality materials. Super processing.

With the help of adapter rings, it can be easily screwed onto my lens.
I still have to practice using the filter correctly. But I'm already very excited.

The only drawback, if one may call it that. There is no indication of the content on the pencil case, if you now have several filters, you do not know at first glance what you are holding in your hand.

K&F Concept Nano-X PRO series polarizing filter 67mm

From the packaging to the finished picture, everything at the highest level. Quality and processing of the filter is top top top. It can be screwed into the lens thread gently and without tilting. The turning mechanism has a good resistance and can be adjusted perfectly. The image results are convincing and I could not find any negative effects. (Color fringes or the like)

How do you rate the price of such a filter? I think people with photographic experience know what such a high quality filter costs. I think the price is quite reasonable for the high-quality and very well-made filter.

The price for the 77 mm variant is in a demanding range at €180; the expectations are corresponding. I compare the filter side by side with my Käsemann B+W KSM HTC-POL MRC nano XS-PRO DIGITAL, which is about 25% cheaper depending on the source.

The K&F circular polarizing filter comes in a high-quality cardboard slipcase packaging. The actual case is just as high quality. The question is whether such a chic case is also ideal for transport - or whether the classic plastic filter box does not offer better protection against mechanical damage or moisture. I mean yes.

Visually, I think the K&F filter is excellent, and that's the main thing. I can't tell the result from my Käsemann B+W filter. Both filters swallow a little more than 1 f-stop of light. The effect is indistinguishable. I don't notice any optical impairments or color shifts. See photos. In my example photos, I worked with a constant white balance.

The filter can be easily screwed in. It is approx. 5 mm thick without the filter thread, my Käsemann B+W filter is only approx. 4 mm.

Now my point of criticism, which leads to the deduction of a star. The filter is relatively stiff when new, in contrast to my Käsemann B+W filter. By turning it back and forth several times I got it smoother. But the circulation isn't quite even, there are places that run better and places that offer a little more resistance. No problem at all, the filter can be used without any problems, but as I said, we are talking about a high-priced product and I have the direct comparison.

I've known K&F for a while now and have one or the other product from them (UV filter and camera backpack). For me, the brand was always technically good value for money and more in the middle price segment.
But now they want to know and are penetrating into the high class area.

A CPL filter is used for reflective environments such as water, panes and glasses or the sky. Exactly these reflections are taken out here and you manage to take pictures down to the bottom even with clear water.
So for me, especially on vacation, it's always a filter.

The filter comes very nicely packaged and is a lot of fun unpacking. Anyone who loves unboxing will get their full enjoyment here.
The filter comes in a cloth/leather bag. Very nice in itself, but in my opinion a filter sits more snugly in the well-known plastic boxes.
The inside of the packaging can be converted into a "picture frame". Funny idea but I think there are nicer ones.

But let's get to the filter itself. Here I have to say again that the performance matches the price and is absolutely justified.
Flawless workmanship, both on the filter thread, ring and glass.
Only the ring is a bit difficult for me personally. If the filter doesn't fit snugly on the lens, it has happened to me that I unscrewed it instead of adjusting it.
The glass is of the best quality and the optical performance cannot be distinguished from a CLP filter from the well-known competition.

In summary, a very good filter in terms of quality and optical performance. It has weak points in the somewhat loose fixation in the storage bag and the stiff ring.
For the price, I really hope that things like this don't happen. So unfortunately I have to deduct a star.