Good in excellent quality... it adheres perfectly to the GoPro... allows you to slow down the shot to get the famous silk effect even with the GoPro

Lense works fine, took it out and did a few shoots with Gopro 9

bought the K&F Concept Circular Polarizer for the GoPro Hero11 Black and my first thoughts are that it is a good product and does its job well. The filter itself lowers the exposure by 1 1/2 stops compared to the standard lens cap. The images show before and after glare reduction. On the first picture the filter is set to zero while the second is set to full polarization. The difference is most noticeable on the rear quarter panel of the car.

Filters for Gopro Hero9 really good and quality. Very nice also aesthetically with a metal frame that perfectly matches the Hero9's lens. Because these filters mount, replace the original Gopro lens cap and don't put them on it. They are easy to use and apply, packaging is minimal with a very handy transparent plastic case containing filters and a cloth for cleaning. Really a good product

It feels so tough and durable, packaged superbly and delivers the best segment filtered result.

K&F Concept Neutral Density ND64 filters are made right, the frame is sturdy

I didn't notice any strange colors. I see them perfect and of quality. They even have rubber grommets to make them waterproof. They are cheaper than the Polarpro and also come with nd64 and CPL. Here in Andalusia at noon in full sun with the shutter itself at 1/120s for 60fps the nd32 sometimes falls short and it's better to use this nd64.

The K&F Concept Circular Polarizer CPL is an excellent product that offers a number of benefits for photographers and filmmakers. One of the key features of this CPL is its ability to reduce glare and reflections, which is particularly useful when shooting in bright light or near water. This is achieved through the use of transverse polarization, which helps remove unwanted reflections and improves the saturation and contrast of your images. The quality of the images captured with this CPL is excellent. Colors are vibrant and contrast is sharp, making for stunning photos and videos. The build quality of the CPL is also impressive. It is made from high quality materials and is built to last, ensuring it will be a valuable addition to your photography equipment for years to come. The K&F Concept Circular Polarizer CPL is also very easy to use. It simply screws onto the front of your lens and can be rotated to achieve the desired effect. The filter is also compatible with a wide range of lenses, making it a versatile addition to your camera bag. In terms of price, the K&F Concept Circular Polarizer CPL is very affordable compared to other CPL filters on the market. This makes it an excellent option for photographers and filmmakers who are just starting out and are looking for a quality CPL at a reasonable price. Overall, the K&F Concept Circular Polarizer CPL is an excellent product that offers a number of benefits for photographers and filmmakers. Its ability to reduce glare and reflections, high build quality and affordable price make it an excellent choice for anyone looking to enhance their images. If you are looking for a high quality CPL filter, the K&F Concept Circular Polarizer CPL is an excellent choice.

The filters made of metal are of very high quality. I recommend!

As the title suggests, I've currently had the option to try just one of the filters. Aluminum frame and looks well made and assembled. I reserve the 5th star (full satisfaction) for prolonged use and mainly to check the goodness of the lens (that it doesn't "tilt" or ruin like other views)