This Magnetic Variable ND Filter is a great option for those who travel, take pictures outdoors and who would like to capture an image at lower settings which cameras are incapable of without ND filters. This particular filter gives you a range of options which simplifies what a photographer has to carry. For those who regularly shoot in conditions which they cannot plan around (such as harsh sunlight), this gives more options within your control. It arrives with a protective case and a magnetic adapter ring so that you can simply remove the filter if you wish to shoot without it. However, the downfall to this is that the ND filter can be bumped off (which did happen to me while setting up a photo and my camera swung forward) and with this adapter on you cannot mount your lens hood on your lens.

On a bright and sunny day, I was able to capture an image at 1/50, f/2.8 ISO 100 at the ND2 setting. I attached a screenshot of the straight-out-of-the-camera RAW files, with the bottom image being no filter. Each setting produced the same image with one exception; the images with the filter on appear to have slightly more contrast to them. This could be due to the fact that I cannot have my lens hood on, causing the filter-less image to be exposed to the harsh sunlight. Or, it could be an effect of the ND filter itself. Either way, I do like the effect and would recommend this filter.

One of my greatest concerns when purchasing this filter was its wide focal lens performance, which I can understand is challenging due to light physics.

After testing on my Sony PZ16-35 lens:
- At 16mm focal length vignetting is not usable and needs to be cropped.
- At 17mm it is very light and hard to notice, very usable to me.
- At 18mm I can't see it at all and looks great.

I uploaded 5 images to this review (pardon the high ISO, as I tested the filter at ND32). Focal lens of each pic: 16mm, 17mm, 18mm, 19mm, 20mm.

I am keeping this filter because I don't think I'll be able to find a filter that accomplishes no vignetting at 16, but I wish companies were more upfront about which exact focal lens their filters support well.

High quality glass with magnificent ND filter performance throughout the entire ND2-ND32 range. There's no "X" from turning the filter too far since there's hardstops incorporated into the design.

The set includes a magnetic adapter ring which screws onto your lens and serves as the mounting vehicle for the ND filter - just snap it on and off whenever you like. Very convenient.

The filter itself provides a wide range of density, with minimal color shift which is important.

Slim design is great and doesn't result in any vignetting during regular use.

Overall, excellent filter that produces consistent and reliable results.

This is one of the best additions to our camera since we got it. It is very easy to install and once in it stays put due to the alignment slots on the back side.
Adjusting it is very easy once it snaps in. We like the infinite variability, it allows you to perfectly tweak your settings for each scene.

I come with a long history of taking photographs with filters for special effects. I have used Cokin systems where you can share one filter with various lenses with adapters. I own over 50 such filters and lately, I am simplifying my camera bag and traveling with only a few filters. My most popular filters are the graduated neutral density (ND) filters. With these, I can rotate the filter to my preference on each shot. BUT that means I have to carry more than a few of the same ND filter but at different stops.

Solution: The K&F Concept Magnetic Variable ND Filter offers me an option to use one filter covering 5 stops within seconds. That is great timesaver as my shots of landscapes or sunsets sometimes requires swift framing and adjusting to rapid light changes.

ND filters are an investment to your camera gear. These will filter out very bright light and allows the photographer longer exposures during daylight. My favorite use of ND filters is to have water movements look silky while capturing the surrounding in detail. This K&F Concept filter is built amazingly well. The glass is better than my Cokins. Since it is built to specific lens size diameters, I had to rationalize which lens I used the most and ordered that size. 58mm in this case.

The case is a worthy vault for this filter. Kudos to the team that designed that feature. The magnetic ring screwed nicely into my existing lens. In fact, it screwed in too tightly, it took me 10 long minutes trying to unscrew it later on.

The magic is with the magnetic technology. Wow! It was instant on and instant off for the actual ND filter. Amazing. With that also comes the fear of dropping the filter. I fear that a bump will dislodge it so I kept my hand on the lens at all time. If you are in stationary setting, you should be fine.

This lens filter is a great tool for many future vacation shoots. Simple to carry and use.

Do note you cannot place a regular lens cap over the ND filter. Bummer.

Overall, I love the new direction that these ND Filters are headed. It is less fuss and more time spent on the actual shooting pictures. Give this a try. I do recommend this variable ND filter. 4.5 stars.

I’ve hardly taken it off my camera since I tested it. I just loved it. I didn’t notice any color shift but the variable ND has been handy. The magnet is decent in my opinion. It’s the best I’ve seen as they all fall off at some point. This one only fell off when I was storing in my bad and had the lens cover on. It hit the case and fell off. I snapped it back on and and it’s been in place since. I totally forgot that it’s magnetic till it fell off. I believe that’s a good report. I really can’t complain. It’s definitely a good product.

I'm an amateur at photography and decided to try out this lens. I like that you can adjust the lighting and darkening of the lens. I love the magnetic feature.

Having a lot of camera equipment such as strobe lights, key lights, speedlights, umbrella, lenses, extra batteries, tripods and many other things. Wow I can't believe I use so many things just to get the photos that I want. Adding lens filter on top of all these is just.... what a hassle.

This variable ND filter and magnetic adapter ring kit are one step in the right direction. It's very easy to put on the magnetic adapter ring kit. Once the ring kit is secured, attaching the variable ND filter is very easy. It's a convenience that this filter god from ND2 - N32, 5 stops.

Hint: Make sure you pick the right filter size. If you have a collection of lenses with varying sizes, pick a higher size. You can buy a separate adapter to downsize.

Very good

After reading some other reviews that said that the magnetic ring wasn’t strong enough to hold the filter I just wanted to try myself. I have no problem with the ND filter falling of the lens. I use this in ND on stage filming artists. The only thing I find strange is that is doesn’t come with a magnetic lens cover, you have to buy this separately.