These are well made filters, the ring is very small so they don't cause vignetting even on wide angle lenses. These screwed smoothly onto my lens and stayed on securely. These circular polarizers only reduce the light a little, and once screwed on there is an outer ring that allows you to rotate the polarizer to get the best effect. You can use these to reduce reflections from things like water, glasses, and windows. Because it reduces reflections, you can look down into the water, making it look clearer and cleaner. It also helps provide a clearer sky image when taking photos outside. This is the “D” series filter, they also have a “K” series. I'm not sure of the exact difference between the two as K&F's own website doesn't really explain it. From what I can tell the "D" series (these) are a slightly more expensive design with more layers of coatings including water/oil repellent coatings on both sides. They describe these as "waterproof". Definitely well-made filters that do the job.

Good value for money, took a few test shots, it works

For the price it seems to me that it is far above the quality. I recommend it to people who are on a low budget.

Quality product that arrives well packaged in its plastic case. When trying to unscrew the filter from the lens, only a narrow area needs to be grasped. Up until the point of printing I had no trouble taking it off. As you can see from the pictures it did exactly what it was supposed to do and cut out the reflection from the watch crystal.

purchased this 82mm circular polarizing filter to use with both my Sigme 24-70 f/2.8 E mount and my Canon 24-70 f/2.8L II lenses. It's just a perfect polarizer for these versatile zooms. The lens is extremely well made and the circular effect is smooth as silk when attached to the lens. The high-quality multi-coating ensures details in photos and videos without artefacts or haze and ensures excellent focus accuracy. Polarizing filters have many uses, including deepening the color enhancements of skies and landscapes, especially in bright light conditions. In addition, the circular settings can be used to shoot through windows clearly and without reflection, and to take pictures or videos through water. For example, this filter can be used to capture perfect images of Koi (Japanese Colorful Carp) in a pond without light bouncing off the water's surface. There are other uses as well. To operate, all that is required is to point a camera at the subject and rotate the outer plane of the filter until the desired effect is visible through the viewfinder... or on a screen. Easy peasy. I own a number of K&F filters of various types including UV, ND and diffusers. I trust the company's products. This is excellent value for money compared to much more expensive polarizing filters such as those from B+W and Hoya while offering virtually equivalent performance. Fantastic! It's an unequivocally high FIVE STARS from me, along with my honest and very warm recommendation. Improve your photography and vlogging! get this! *If you found my review helpful to you, please let Amazon know by clicking the HELPFUL button below!

A product that looks great in construction, has a nice sharp lens and the CPL works great. Due to the slim design, the filter does not look like it is mounted. Great!

This one is better on cloudy days. I have several polarizing filters from K & F. I think they have made me a better photographer. It's been snowing lately. I wanted to take photos of the untouched snow. The sun came out and the shine was reflected in the snow. This filter toned down the glare and gave much better shots. Now, without this filter and my black K&F filter, I never head out to the day.

have other K&Fs and they have served well. Picked this up to go on my fancy 50, a "required" lens for "serious people". I use it occasionally but not the best for birds and other wildlife. I assume it will help in the bright sun for flowers and such, but there is neither at this time of year. I was lucky enough to have the foresight to have a polarizer on my lens when photographing the geysers in Yellowstone NP. The difference was overwhelming. Since then I've always done my best to have a CPL for every lens, or at least one that could use a suitable adapter. The quality is sufficient for the occasional use of a lens, and the price is right for it. Recommended.

Anyone shooting outside needs a polarizing filter in their pocket. The build quality and looks of this filter appear to be excellent so far and the overall feel is comparable to that of a more expensive filter. The rotation is smooth and natural, and the 77mm fits my Canon RF lens perfectly.

I ordered this polarizing filter to use with my Sigma 30mm F1.4 DC DN Contemporary lens (my prime lens, not included). Polarizing filters eliminate non-metallic reflections, improving scene detail and contrast. This is a top quality polarizing filter whose polarizing effect can be easily checked by rotating it while viewing an LCD monitor through the filter. The filter has multiple coatings to prevent annoying optical reflections from appearing in photos. The filter processing is excellent: the threads attach cleanly; the filter rotates smoothly when the lens is mounted. And the foam-lined durable plastic filter case effectively protects the filter while sitting in a camera bag.