Over all build quality and design is very good but Having vignetting with 24mm lens, Best to use with higher focal length than 24mm

This is a good adjustable neutral density filter with no problems I can see. It uses K&F's special coatings to help repel dust, water and fingerprints. This filter has a magnetic attachment system, there is a magnetic ring (with no glass in it) you screw onto your lens. Then whenever you want to use the ND filter you just pop it on and pull it off magnetically, making it easy to change. The system seems to work well, but it's the only one of their filters I have which features it. By rotating the filter you can go from ND2 to ND32, or 1-5 stops.

A lot of people wonder what this kind of filter is for, basically it lets you get some different effects when you are shooting in direct sunlight. For example, you can open the F-Stop of your lens all the way to get a shallow depth of field effect, then use the ND filter to darken the image back down so it is exposed right. Another common use is so you can shoot with longer shutter speeds in bright light. This will allow you to get that effect where moving water has a soft motion blur on it by setting a longer shutter speed and adjusting the exposure with the filter. It's also very handy for shooting video in bright light. Using a high F-stop and shutter speed for this can give you a video that has no motion blur and appears to stutter when the camera pans. The ND filter can allow you to shoot with longer exposures which will give motion blur and a smoother more cinematic look when panning.

So overall a very useful filter to have if you do videos or photos outdoors in bright sunlight.

Very good

I received this for evaluation and thought that I would give it a try with a Fujifilm X-T3 mirrorless.

Generally, I run a UV filter on my lenses for a bit more protection from the elements (I like to shoot at the beach a lot and the salt air can easily leave a coating on the lens). But when I want to achieve slower shutter speeds to soften waves, I utilize a series of ND filters. This requires me to add a filter holder in front of the lens and then slide my ND filter of choice into the filter holder.

This set up makes the whole process so much easier. I can attach the included magnetic holder into my 18-55mm zoom lens. Then, when I want to attach the variable ND filter, I reach into my bag, pull this baby out and let the magnet attach it to the lens. It spins freely so that I can dial in the amount of ND that I want. No more fussing with multiple filters stacked in a filter holder. That makes me happy and leaves less room for error, more space in my camera bag, and less fumbling at the beach with the wind and sand blowing.

It is a tad pricey to me but the overall improvement of time, effort, and ease of use make up for the price.

K&F is one of the most underrated brands in photography/videography. Because they are value-priced, the You-Tubers out there turn their nose up at this brand while they hawk more expensive brands through their affiliate links, but after owning and using a half dozen K&F filters, I'm a convert. I had purchased a Tilta Mirage matte box, with the intention of using a large-format variable ND filter, but while the matte box looked impressive, I realize that it was more of a hassle than it was worth just to "look cool", so I was looking for a screw-on variable ND and settled on the K&F concept. As advertised, it delivers 5 full stops of exposure control and, most importantly, does so without the dreaded "X" that is a frequent problem with cheaper filters. I did a comparison using the Tilta Mirage variable ND and the K&F filter, and there was no visible difference in qualtiy.

When I ordered this filter, I was unaware of the magnetic mounting system, and I have to say that I am now spoiled forever. With the magnetic ring srewed on, mounting and unmounting the filter takes just a second. I wish more filter manufacturers would use this system.

The price to qualify ratio for this filter is excellent.

I’m learning new photography skills using ND filters. What makes this one nice is it does 1-5 stops. It’s got dots at each stop so I know where to stop. It stops rotating precisely at 1 and at 5 so no mistake can be made.

It’s magnetic. There is a ring that screws into my lens and the filter sticks to that ring magnetically. This allows quick removal of the filter so that reference photos can be taken first, if desired. The filter pops off and on easily and stays securely.

A plastic case is included for protection.

I have nothing negative to say about the set up. It works well and is high quality. I recommend this filter.

This filter has 5 stops varies the density as per light intensity required. Overall quality is great and it is a good product to carry for the photoshoots.

Serves good for my Sony 16-35 F4. No image degradation as far as I can see even at 16mm

Excellent product. Very minimal colour shift and no dreadful X. Should have add-on option to purchase the magnetic lens cover as a bundle.

The magnetic mount on this ND filter is a game-changer! It’s incredibly convenient to switch lens covers quickly and efficiently. The filter itself works beautifully, providing excellent performance without causing any issues.

This is a fantastic addition to any photographer’s kit, combining ease of use with reliable functionality. Highly recommended!