This is a really, really nice CPL filter. It has a very slim design so it doesn't result in any vignetting, even while using may long telephoto lens.

Threads onto my lens easily without issue.

Adjustment of the polarizer is smooth and predictable.

There's no color shift or any other artifacts from the filter. Just crisp images with accurate color.

The filter comes with a nice fabric storage case, along with a microfiber cleaning cloth.

There's also a little instruction card that details how to use the box the filter was packaged in as a photo frame. Kinda kitschy but whatever. I just tossed it.

Great quality though.

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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.

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.

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 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.

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.

This filter and its packaging exudes quality. But of course, it all comes down to the filter itself, regardless of how nice the packaging and presentation, and this filter didn't disappoint.

I tried it out on my Nikkor 24-85 on a Nikion D800 for a few basic comparison test shots (see my pictures). The polarizer is easy to turn and feels fluid. Dialing in the right spot is pretty easy. I noticed no degrading in the image quality, attesting to its glass and coating quality.

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

This filter and its packaging exudes quality. But of course, it all comes down to the filter itself, regardless of how nice the packaging and presentation, and this filter didn't disappoint.

I tried it out on my Nikkor 24-85 on a Nikion D800 for a few basic comparison test shots (see my pictures). The polarizer is easy to turn and feels fluid. Dialing in the right spot is pretty easy. I noticed no degrading in the image quality, attesting to its glass and coating quality.

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

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.