I've used ND filters from K&F in the past, so I wasn't surprised by the quality compared to newbies. The filters allow sharp focus without restrictions. Thanks to the really extremely thin glass and the thin frame, there is no cloudiness or dark spots at the edges.

The frame has small brackets so that if you want to readjust it, you don't have fingers in the picture.

The whole thing is rounded off by a nice leather storage pouch. Overall, absolutely great!

I am a Professional Home and Personal Chef and I also teach cooking both in videos, directly online and in live streams. I am also an online influencer, Vlogger and commentator. As such, my needs are extensive and many when it comes to cameras, microphones, mixers, input devices to computers, studio, lighting & editing equipment, as well as various control apps. I am picky and critical in reviewing and care little about brand names or product claims. If they are good, I will praise and recommend them, and if not, I will fully explain my reasoning for saying so. Honesty is my reviewing policy!

I have become a big fan of K&F and their filters. Even their lower-end filters perform brilliantly, but THIS one takes the cake! It's an absolutely superb filter that I would not hesitate to put against the most expensive high-end German filters than cost more the double the price!

The 36 multi-layer NANO-X coating is very evident in the quality of polarized images it produces. The threads on the filter are micro-fine and screw into a lens without any issues whatsoever. The circular adjustment is smooth as silk and effortless.

For me, this is a very versatile CPL lens at 67mm that many of my Sony, Sigma, and virtually all of my Tamron lenses use! I have tested mounting and removal on every compatible lens with a single issue.

This is the highest quality level of K&F Filters (NANO-X PRO). It comes with a 2-year warranty, and a manual is available online. They add a Microfiber cleaning cloth in a sealed pouch in the box as a nice bonus. Thoughtful!

The filter comes secured in a VERY nice faux leather overlap storage pouch. Clearly well thought-out.
Don't be put off by its Chinese Manufacture! It is super high-end and exceptionally well designed and produced. The company has won a number of INTERNATIONAL awards for design and their patented products are available in 56 countries.

This is truly an amazing filter for the price offered on K&F Concept. It is clearly the BEST CPL filter I have ever used over the years...including those from well-known and very expensive German manufacturers.
The filter and the inclusions rate an unequivocal STRONG FIVE STAR rating from me, along with my honest and VERY hearty recommendation! You cannot go wrong with this filter if you need a CPL!
Simply SUPERB!
Happy Shooting!

I used this for an Iceland trip and was able to capture some phenomenal images when it was on my glass (primarily a Tamron 28-75mm f/2.8 with a Sony a7ii).

The ring itself is a little stiff, but that's great for a polarizer - means you have one less thing to worry about when framing your shot in that this won't turn a few degrees on you. In terms of negative impacts to image quality, I can't notice many but I'm not exactly a pixel peeper.

For my uses, this fit the bill!

A Circular Polarizer is one of the best filters to own. It allows you to block out light coming in perpendicular to your lens. And with a circular polarizer, you can easily rotate it to reduce or remove reflections and glare - or reduce the brightness of the sky.

It also comes with an attractive pouch for storage.

This one is a nice design. It is small form, which I prefer. It rotates smoothly. And most importantly, it doesn't degrade the image.

I prefer this CPL to my Tiffen one.

K&F has always been known as a company that produces fairly inexpensive gear that performs "good enough" for most non-professional situations. With this filter, it appears K&F is going after the professional shooters.

The optical quality of this filter is fantastic. I had zero glaring issues when using this outside which is something I usually run into with budget filters. There was very little color cast even when using at the higher strengths. It comes with just a fantastic high quality case.

I hope to see more filters like this from K&F. I am a big fan of really high quality gear which it seems K&F is starting to produce now.

The K&F Concept 77mm Circular Polarizers Filter Super Slim with 36 Multi-Layer Coatings, High Definition Circular Polarizing Filter (CPL) Camera Lens Filter (Nano-X PRO Series):

Is one of the finest quality filters I've used. Everything about this is premium. From the packaging to the filter wallet to the product itself is top notch. It has a brass powder-coated frame and high quality, crystal clear optics. A filter I don't feel too bad putting in front of my best glass. The threads are precisely machined and screw in and out very smoothly. The CP rotation feels impossibly, buttery smooth. Like its hydraulic but it's not, it's just a ridiculously smooth action. Like a high quality potentiometer. The knurling feels very nice, and over all the whole thing feels really great in the hand. As far as the polarization effect it works as it should and as expected, and with crystal clear optics. The included filter wallet is made from suede and heavy denim, with a pull ribbon to retrieve the filter with out stick your fingers down the pouch. The whole thing is rather lux. The packaging itself is a very classy, thick black box, with gold accents. the box also turns into a picture frame. The package also contains a microfiber cloth. Overall this is a very deluxe filter. It is a bit pricey, however the quality meets the price for sure. You get what you pay for sometimes and this is one of those times. You don't want to buy top quality lenses, costing thousands of dollars, and put a cheap filter on it. This is the type of filter you can feel good using on your best lenses. Precision machining and great quality glass.

K&F keeps offering some amazing quality in both build and image reproduction. This filter does what it's supposed to and it also doesn't distort the image or color. No surprises here. What you see is what you get in an amazing package to carry it from place. Great CPL here.

Yeah you pay for it, but I’ve seen filters a lot more expensive that didn’t look as nice or work as well.

After testing this I’ve seen absolutely no optical distortion whatsoever. It is a beautiful polarizing filter that is precision made as you can get. The threads are very easy to screw into the lens and the ring turns with buttery smoothness. This allows you to get any sort of Grady action you want to you in terms of polarization. This mechanism, the simple, is incredibly precise.

The glass is absolutely perfectly flat as much as I’m able to measure it. And even using the laser test I saw no distortion whatsoever.

This is supposed to have some kind of nano coating that makes it scratch resistant and also shed water much easier. I really hope not to test this.

Every filter by this company has been first class all the way. Absolutely professional quality in this one is no different. I have a $300 German made polarizer and I don’t think you can tell the difference. I also have some other expensive ones that are not nearly as good as this.

As for the German one, they look identical and they feel identical. And that’s at half the price. This company makes some first class stuff. I won’t have a reservation ever buying a K&F filter.

Filter is nice

First of all, I was pretty impressed with the packaging 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 right? Well, actually no. I found that it functions best, at least in my application, for reducing glare of windows, windshields, water, and basically anything that has a reflection.

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

This is truly a beautiful piece of glass, and you don’t have to worry about it “downgrading” your footage or photos. It’s definitely more of an upgrade.