Magnetic filters are just plain awesome, especially when they include a magnetic lens cap. K&F concept's 1/4 black soft diffusion filter provides a hefty dose of the 'CineBloom' effect in a magnetic, quick-swap system that includes a lens cap.

Installation is simple and begins with installing the threaded magnetic ring adapter. Once the magnetic adapter is installed, the filter is attached via magnetic attraction, as is the lens cap afterwards.

The filter looks great, with zero distortion or color shift. These are pretty slim so I didn't experience any issues with vignetting.

The reason I took off a star is that the lens cap is fairly difficult to remove. The magnetic forces are ridiculously strong, too much so. Removing the lens cap is difficult, an I usually end up having to use so much force that I end up running a finger across the lens once the lens cap finally budges.

Other than that, its another quality filter kit from K&F concepts. Buy with confidence.

Magnetic filters are just awesome, especially when they include a magnetic lens cap. The K&F Concept 1/4 Black Soft Diffusion Filter offers a high dose of the “CineBloom” effect in a magnetic quick-swap system that includes a lens cap.

Installation is easy and starts with installing the threaded magnetic ring adapter. Once the magnetic adapter is installed, the filter is attached by magnetic attraction, as is the lens cap afterwards.

The filter looks great with no distortion or color shift. These are fairly slim, so I didn't have any issues with vignetting.

The reason I took off a star is that the lens cap is quite difficult to remove. The magnetic forces are ridiculously strong, too much. Removing the lens cap is tricky, and I usually have to use so much force that I end up running a finger across the lens once the lens cap finally moves.

Other than that, it's another quality filter kit from K&F Concepts. Buy with confidence.

The "K&F Concept 67MM Polarizing Filter Circular Polarizing CPL, Ultra Slim, Japan Optics, Multi-Coated, with Lens Cap" came in a branded box. It was nice to find the filter in a hard plastic case for protection, with a lens cap already attached to the filter. I ordered this filter for a Nikon P900. With the lens cap still attached to the filter, I carefully screwed the thin filter into place. I then took a series of pictures to check its effectiveness, and have included two pictures of the original Nikon lens cap showing the difference. When attempting to remove the filter, I found that it was stuck, so I had to resort to a filter wrench to remove it. The reason it got stuck was because I was turning the polarizing ring clockwise and counterclockwise from my perspective behind the camera. I must have just caught the threaded ring with my finger as I turned it counterclockwise, just enough to lock the filter in place. Some suggestions I have from using the filter; 1. When installing the filter, leave the lens cap on as it gives a larger shooting area. 2. Only turn the filter clockwise when viewing it from behind the camera to avoid repeating my mistake and lock the filter in place. 3. Carry a suitable filter wrench when using one of these filters just in case it gets stuck. 4. If it fits a P900 and it gets stuck. Zoom the lens so it points out about 30mm then remove the battery without turning the camera off. This will stop the lens retracting when the camera is off and if the camera is left on it will stop the lens trying to counteract the movement. 5. The lens and cap are stored in a small cellophane sleeve inside the plastic case. It is best to leave the lens cap on and insert it so that the flap of the cover is on the same side as the lens cap. This virtually eliminates the risk of the sticky flap touching the exposed filter surface. The only thing that would make this filter better is some sort of cover for the exposed surface or attachment points to hold the filter in place inside the case.

know a lot of people don't use UV filters, but I like having them for protection. I'm often at the beach and this protects the front of the lens from sea spray and sand. This UV filter is one of the best I've ever used. This does not affect image quality in any way, and the knurled parts make it easier to grasp the filter to remove or attach it. It feels of good quality and is barely noticeable on the front of the lens. It comes in a padded plastic box, so it comes in handy if you need to store it for future use. I was pleasantly surprised to see that the filter came with three individually sealed microfiber cloths that are always handy. They are of good quality and do an excellent job of cleaning the lens without leaving any marks. The only downside for me is that there is no thread on the outer part of the filter so you can't put another filter on it. It's not a big problem, I just have to remove the filter before fitting another one.

Combining an ND filter and a Circular Polarizer in one filter is such a helpful filter, there's almost no reason to remove this from my lens, unless I am shooting indoors. Having both in one filter and being able to dial both in separately is such a good tool and accessory, it is really amazing for using when shooting outdoors in bright sunlight, for being able to lower the f-stop to get my aperture low and get those wonderfully creamy blurry backgrounds, and also dialing in the reflections off of the water, or enhancing the skies. This filter is quite a bit larger than most, and is definitely not a small thin filter, but the glass is great quality, and the threads are machined perfectly. I have no complaints about this filter at all and am really happy I decided to order it. It will get a lot of use from now on.

It's a nice filter, just like the other models I have from them. I needed another polarizer for my Sony E-mount 55-210mm lens and when K&F Concepts released another filter set I decided to give it a try. I was curious to see if I could tell a difference between some of their other polarizers. After some testing I really can't tell any difference. I took a few shots of my neighbor's old Chevy pickup, which was sitting right at the edge of my lens with the sun looking at the truck at the wrong angle. The filter did a good job and with some small changes in post-editing I was able to have a decent image. I haven't had a chance to go out and take a few shots with this lens filter set, but so far the at-home test has impressed me. The only problem I have is that the lens filter ring is too thin. I can't get a handle on it to remove the filter. I can only grab the circular part. I have to buy another lens filter wrench to remove it. However, this seems to be a trend with this brand. It gets 5 stars because it works and with the lens wrench I have no problems removing the filter when needed.

I dislike the fact that my lens cap no longer stays in, and I can’t remove the filter from my camera now that it is in.I attempted to contact K&F and the webpage is not available.Just a little frustrated right now.Hopefully someone will get back to me before I can no longer return it. That is if I will even be able to remove it to return it.

I give 4 stars because they do not reduce or remove surface or diffuse reflections. They have an aperture stop of about 2/3 of a stop. So that's beneficial enough for me not to use windows, lights or anything that needs to be adjusted.