This filter and its packaging exude quality. But of course, no matter how nice the packaging and presentation, it all comes down to the filter itself, and this filter did not disappoint.

I tried it out on my Nikkor 24-85 on a Nikion D800 for some basic comparison test shots (see my pics). The polarizer rotates easily and feels fluid. Choosing the right spot is pretty easy. I did not notice any deterioration in image quality, which confirms the glass and coating quality.

It comes in a really nice case with a wrist strap. The box even converts into a picture frame... pretty clever. It also comes with a vacuum packed lens cloth which I haven't opened yet so can't comment on how nice it is. Overall it appears to be a very high quality filter for their new flagship Nano-X PRO series.

First of all, I was quite impressed with the packaging that this filter came in.

It's good to see that at this price point, exceptional quality packaging is used to protect this gear, which is relatively expensive for what it is. It's just a piece of glass, isn't it? Well, actually no. I found it worked best, at least in my application, for reducing glare from windows, windshields, water, and basically anything that has a reflection.

I can shoot video on top of a car and eliminate the distracting elements of passing trees or just the environment the car is in.

This is truly a beautiful piece of glass and you don't have to worry about your footage or photos being 'downgraded'. It's definitely more of an upgrade.

Gray filters are indispensable in photography. They are used all the time, especially in landscape photography. You know these great pictures with the flowing water that looks so "fluffy" soft - for something like that you need a gray filter. A gray filter, or "ND filter" (neutral density filter) swallows the light so that you can expose longer can. This long exposure and the movement of the water makes it look so great. By shooting with a ND filter, the light that hits it will be darkened and you can shoot better in very bright surroundings shoot with a wider aperture or longer exposure times. By shooting with a longer exposure time you can achieve beautiful effects. Normally, pictures are overexposed if you choose a particularly long exposure time. You can prevent this with a neutral density filter and take pictures with a long exposure time despite a lot of light. This has the result that movements become blurred and merge into one another. In this way, for example, you can capture bodies of water or clouds , as well as represent fast-moving objects in a particularly creative way. A cleaning cloth is included. I took the five pictures and numbered them. The difference is clearly visible. The filter is worth the money, it is simply screwed on and even my lens cover still fits on it. This filter makes you want more and gets full marks from me!

I occasionally carried a few individual filters with me. But it was often too time-consuming for me to mess around with it in nature. Screwing the filters on top of each other in order to get further adding gradations is fiddly. There are enough individual ND filters, but each time you had to change the filter again...

With this filter here you basically cheat the whole handling. I wasn't even aware that something like this existed. Therefore I have attached a small video so that you can see the function. Even if there is "only" ND2-32 here, you can see what these products can do.
A matter of seconds, especially for experimenting, sometimes using a different filter setting. With low filter strengths, the camera automatic is sufficient and you can see the current exposure time when adjusting the filter if ISO is fixed. In this way, soft water structures can be created in relatively bright light, or soft clouds in the sky, etc.pp. I didn't really notice scattered lights or reflections, but I work on that on the PC anyway.

The price for this product is high, but considering that this covers several filters, again not too bad. However, the general question is what kind of filter do you really need. I previously had an ND8 and an ND1000. Sometimes an ND 4000 would have been required (to safely create "deserted" objects/places).

Nevertheless, I find the concept here really innovative and practical.

The filter comes very well packaged in a box that doubles as a picture frame. The actual storage takes place in a very high-quality leather case with an "ejection strap" so that you do not have to tap your fingers into the filter disc when removing it. The filter and its mechanics are very elegantly manufactured, so the filter thread can be easily attached without scraping noises and frequent attempts to attach it screw in and loosen again with moderate force after tightening, provided the internal thread of the optics is not damaged and is of the same high quality. What is special about this (ND) filter is of course the possibility of continuously adjusting the filter grade/strength using the screwed-on brass handles, what also works very smoothly and impressively! So a filter change is largely unnecessary, a grip on the rotary ring is enough. The range in which the filter effect can be changed is enormous. As an example: Aperture 13 to aperture 5.6 with the same exposure time or with a constant aperture, the exposure time changes from about 1/4000s to 1/320s. This saves a few filters and enables fine and simple adjustment to the desired effect! In combination with the K&F quality of the Nano-x Pro series, the price is also put into perspective. Personally, I am definitely enthusiastic, I have never had so much fun with a filter ... This saves a few filters and enables fine and simple adjustment to the desired effect! In combination with the K&F quality of the Nano-x Pro series, the price is also put into perspective. Personally, I am definitely enthusiastic, I have never had so much fun with a filter ... This saves a few filters and enables fine and simple adjustment to the desired effect! In combination with the K&F quality of the Nano-x Pro series, the price is also put into perspective. Personally, I am definitely enthusiastic, I have never had so much fun with a filter ...

A circular polarizer is one of the best filters you can own. It allows you to block light that falls perpendicular to your lens. And with a circular polarizer, you can easily rotate it to reduce or remove reflections and glare — or dim the brightness of the sky.

It also comes with an attractive pouch for storage.

This is a nice design. It's a small shape which I prefer. It turns smoothly. And most importantly, it doesn't degrade the picture.

Hello, you have to give K&F one thing, the design of the filter and the bag as well as the workmanship are 1A and I couldn't find anything particularly negative on the test images, but I still only give 2 stars. Why? 1. In my opinion, the variable gray filter ND 2-32 is poorly chosen and insufficient in terms of gradation. Many who work with gray filters use ND 8, ND64 and ND1000, for example, in order to be able to really carry out a long exposure to smooth water or people to make the moving images disappear and that is not possible or only possible to a very limited extent with the gradations from ND2 to ND32 selected here.2. The price, K&F is asking 280 euros at the moment and for this money you get a really good plug-in filter system with various filter plates incl. POL filter or a magnetic round filter system. Such systems then usually fit the entire range of lenses from 82mm screw thread onwards, while these filters only fit 67mm lenses and with a step-down ring also on smaller lenses but not on larger ones.3. For the price, it would have been desirable if you had haptic feedback on the 5 levels when you reached a level, but the filter turns buttery soft, which is very pleasant from start to finish. Conclusion: For whom can I recommend the filter? Actually only for people who don't know what to do with their money, who only have lenses with a 67mm screw thread and are too lazy to buy normal screw filters in several strengths and then change them depending on the requirement.

I tested the K&F Concept Nano-X PRO series polarizing filter 67mm with the Sony A7RII on a Sony SEL-20F18G. I use polarizing filters 99% of the time in landscape photography. Since the effect can practically not be recreated in post-processing, a polarizing filter is one of the only material filters that I use regularly, along with neutral density filters.

The K&F is one of the slim filters. This can prevent vignetting in the extreme wide angle, but makes handling much more difficult due to the narrow version. Due to the design, this is the case with almost all manufacturers. After all, the filter has a threaded socket at the front, so that several filters can be screwed on one after the other. Lens hood and lens cap can also be attached depending on the type. The filter comes in a high-quality, sturdy bag with a magnetic closure. As a small gimmick, the manufacturer also includes a microfiber cloth for cleaning.

The thread can be unscrewed cleanly. The rotary version runs cleanly and smoothly. Due to the slim design, handling is sometimes very difficult. On the one hand you have to be careful not to screw the filter too tightly onto the lens, otherwise it will be difficult to loosen it by hand. On the other hand, turning the filter counterclockwise runs the risk of unintentionally loosening the filter if it is not screwed on tightly enough. Operation is also no longer possible with the lens hood attached.

The glasses come from the Japanese house Asahi Glass and appear to be highly coated. I couldn't detect any loss of sharpness, even at extreme magnification. I could detect a minimal color deviation into the reddish. But this is really hardly noticeable. Since the lens I used is not prone to lens flares, I was glad that the filter didn't deteriorate. The filter absorbs almost exactly one f-stop of light, which is a very good value. The filter effect is good, but I honestly didn't expect anything else in this price range.

On my attached pictures you can see the result in strong backlight, with and without a filter. I couldn't find any quality differences or lens flares here. The filter effect can be seen clearly on the leaves on the other two images. Here the sunlight falls on the bushes at an angle of about 90 degrees. The polarization effect is clear. The white balance was consistently set to daylight for all shots. Here you can hardly see the very slight color shift.

Until now, I hadn't had the K&F Concept on my radar in this price range. The results of the filter are top notch and do not detract from the quality of my high quality lenses. Unfortunately, you have to live with the somewhat difficult handling with this design, K&F is not reinventing the wheel here either. For the optical performance, however, I award the full five stars.

Is a polarizing filter the same as a polarizing filter? No, that is not so. Polarizing filters polarize to a greater or lesser extent. That shows you the price you pay for it. But there are other things too: A really good filter does not have a light metal frame, because this could twist under pressure when screwing in and the filter could seize up. This polarizing filter has a heavy and precisely made brass mount, the rotary ring to bring the polarizing filter into the right position runs smoothly and smoothly. Additional corrugations on the socket prevent fingers from slipping when turning. This is also bitterly necessary, because the filter is designed as a "slim version" with a very short overall width in order to also be suitable for wide angles.

The filter's coating looks impressive and I'm happy to believe that it's particularly effective at preventing reflections (although this could only really be proven in a comparative test). The polarization effect is very good and there is no color deviation in Lightroom.

I have never owned a photographic filter that was so elaborately packaged - yes, almost "staged" - like this professional filter from the Chinese manufacturer Shenzen Zhuo Er. With this, the manufacturer wants to underscore its claim of being at the forefront of the market segment. I take it for granted that he can do that. In terms of manufacturing quality, the filter easily reaches every Heliopan or Rodenstock filter. Of course, it also costs accordingly. I'll be happy to buy a few more filters of this type - I've got a taste for them now.

Do you automatically make better pictures by using such an expensive filter? Definitely not. If you were previously satisfied with your image results, this filter will not open up a "completely new world" to you. But if you're eager for every technical possibility to improve quality, then, yes, you should really consider switching to these fantastic filters.

Although I have a filter of the same brand that works correctly, the light and contrast cannot be changed. This filter allows, albeit subtly, to gently rotate the lens once attached, altering the perception of the image in terms of light, contrast and colour. This isn't a change with a lot of variation, but you can easily retouch the intensity with which an image is captured.
You might rate it negatively because of the price, but in my opinion it's a personal and relative assessment.
The quality is very good and does its job perfectly.