It does not produce vignetting or change the image color

This was a great purchase for my lens. I do a lot of natural light, outdoor shoots, so having something polarized really brought my vision to life. Love that you can control it as well!

great product and something every serious photographer should have in their kit.

K&F generally has good products and cares about customer satisfaction.

Is a great filter to put on a camera lens to photograph sun related bright objects

Here's an organic and detailed review for the product "K&F Concept 72mm Variable ND2-ND400 ND Lens Filter (1-9 Stops)": Title: A Versatile ND Filter That Unleashes Your Creativity As a photographer with a passion for capturing artistic movement, few accessories are as valuable as a good variable ND filter. And K&F Concept's has earned a special place in my kit. From the first glance, the matte black anodized aluminum construction with Nano Crystal coating inspires premium quality. It feels sturdy in the hands and has an exquisite finish. But where it shines the most is in its practical versatility. The adjustable neutral density range from 2 to 9 stops allows for precise control over the most extreme exposure times. Whether softening the movement of water, capturing the vibrancy of cities, or simply releasing the shutter in bright conditions. The transition between densities is smooth and free of harsh lines. Unwanted flare or reflections are conspicuous by their absence thanks to the advanced low reflection coating and lint-free interior lining. In the field, the adjustment ring rotates firmly and without any snagging to vary the density with a single turn. The markings at stops are highly visible and make it easy to get the desired level. A clever touch is the window insert in the ring that allows the aperture scale to be seen from the viewfinder without removing the filter. A real lifesaver! In short, a high-end ND filter at a very reasonable price. Top-notch optics, sturdy construction, and creative versatility make the K&F a reliable companion to take my photography to the next level. Definitely recommended!

This help me to get great images by keeping my exposure same and use this filter lens to better contrast.

These K&F filters are fantastic filters at a great price! They are constructed with Japanese optical glass and are flawless. I have the UV, CPL and ND filters for all of my lenses from 52mm up through 82mm. At this price point and quality level it's easy to have sets for every size lens in my kit!

didn't know how much I needed this until after I bought it. I no longer have to increase my shutter speed or my focal distance to decrease the brightness. I can finally take pictures with blurry backgrounds outside during the day

If it works, it's a good product,