I 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!

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Used to prevent dust in my Sigma 24-70 (which is known for its dust problems under the front lens). I have not noticed any loss of quality in my photos

I got the 77mm to fit my 24-70 f2.8 lens. This seems to be a really well made filter. Turning of the ND tabs is firm but butter smooth. Then you turn the whole outer frame housing for the polarizer adjustment. That is also firm, maaaybe just a little too firm as turning clockwise can actually start unscrewing the whole assembly from the lens! It does have a serrated inner lip to ease with tightening it to the lens.

Recommended!!

An excellent UV filter that fits perfectly on my Sony 24-105mm camera lens.

Already have the Sony 55mm and G 70-200. With this small, lightweight lens I wanted to expand the options and I'm excited for the price over the quality. It focuses well and has good sharpness. It is used on a Sony A7M3.

Bought for a Sigma Art Sony 24-70 and the Sony 28-135 (with Step Down), it is now permanently on my lenses. Additionally, having an ND and a polarizer on the same filter is a really nice surprise, especially at this diameter. For video recording and holding at 1/50 or 1/100 in broad daylight, this is best. A highly recommended essential.

I bought this filter for the Sony 24-70 2.8 GM lens.
The filter keeps what it promises and for this good price.
I can't find any flaws, be it blurring or a black "X"
Clear further recommendation

Bought for a Sigma Art Sony 24-70 and the Sony 28-135 (with Step Down), it's now permanently on my lenses. In addition, having an ND and a polarizer on the same filter is a really nice surprise, especially at this diameter. For video recording and keeping at 1/50 or 1/100 in broad daylight, this is the best.
A highly recommended essential.