This set of filters was delivered fast and well-packaged. It consists of a set of three lens filters: UV, circular polarizing and a variable Neutral Density 2-400 which is 9 f-stops of adjustability.

A UV filter, of course, is just glass, which blocks UV. And circular polarizer or CPL filters reduce glare and increase color saturation by reducing washout from reflections. If you have polarizing sunglasses you know how useful that can be. But as you may know, sometimes when you are wearing such sunglasses and you look at certain things, like your camera or phone LCD screen, it makes it very dark or even completely black. That’s because such screens incorporate polarizing technology and two such polarizers arranged at right angles cancel each other out. So guess what? Variable ND filters are just two polarizers stacked so that when you rotate one on the other progressively more light is blocked out just like using your (usually vertically) polarized sunglasses to look at (horizontally) polarized LCD screens. Pretty clever!

All that said, these filters are an essential tool for anyone serious about photography. This set, in other words, is indispensable. They are excellent quality as well from a manufacturer known for good quality at affordable prices. Yes, you can get better for more money as with anything. Chiefly, you can get more expensive glass and coatings. But to get all three of these filters together, along with a nice carry case that protects all three for $33.49 – list as of this writing – is a tremendous deal. Get these, use them in different circumstances and see how you like the results. You can always get more expensive ones later.

One more thing: unlike some other products, especially clip-on filters for cellphones, you can stack these. That is, you can keep the UV filter on your lens and add the CPL as needed. Or, what may make more sense – what I usually do – is keep the CPL filter on most all the time and add the ND filter when needed.

I had typed a long review that was somehow deleted on its own, so here's a shorter version.

These filters are wonderful. They feel like they're well built and the glass is of decent quality. The UV filter is clear as day, to the point where I didn't know there was a piece of glass there and accidentally smudged my fingers on it trying to feel it.
The CPL filter works great, I was able to take some nice pictures redirecting where the light reflection lays.
The ND Filter is amazing. It's adjustable from ND2 to ND400, so in theory could also be kept on the lens the entire time but the exposure wouldn't be the same. The adjusting part is smooth and feels sturdy, I wish it had a locking mechanism that didn't allow you to spin the glass 360, but that's not the biggest deal.
I also appreciate the carrying pouch that allows you to fit everything that came in the box, from the filters, to the nice added microfiber cloth for cleaning

If K&F does read this though, please make it so you can only adjust the ND filter from Minx to Max and that's it. Don't let us go a full circle to end up in the same range area anyways.

I needed a few filters for a new lens I recently picked up for my Lumix camera, and decided to give these a try. Well, the Circular Polarizer is now living on my lens almost full time, because I find it very useful when shooting in the field, as I can dial it in to see through glass reflections very nicely. All the filters work very well, have good machining on the threads, and screw on and come off pretty easily and without a struggle. These are great quality filters.

The K&F Concept 67mm UV/CPL/ND2-400 Lens Filters Kit is well made and very easy to use. Feel like great quality and this brand is my go to for affordable filters for my camera lens. This kit comes with a cool looking case and it’s light weight. It’s perfect if you’re in a budget.

As always, K&F has delivered on an exceptional kit of lens filters. These are well machined with quality glass. I particularly enjoy the Variable ND 2-400 filter which operates smoothly throughout the entire range. Fits perfectly on my Sony G OSS lens which almost always lives on my camera. The hard-shell case is a nice addition. All 3 filters are excellent- and in a kit that comes in at under $45 at the time of order- this is a terrific deal and brings tremendous value for the every day photographer like you and me.

This is a good set of starter filters for those just getting into photography, they work well, optical clarity is good enough, and the package is affordably priced. The set includes three filters, and comes in a nice hard shell case with pouches to house the filters. I do wish that each filter had a small plastic case to protect it when it's in the sleeves, makes handling them easier since i won't get smudges, etc. on them.

The filters themselves are good quality, especially given their price, these are perfect for someone who is just getting into photography. If you have high end lenses, you should probably skip these and buy higher end filters which will cost a lot more but be better optically matched for high end glass.

Overall, in my use and testing I found these to be fine, they will get the job done!

The lens filters appear optically perfect, and they fit and function correctly. They are well packaged and with a dessicant pack. The carrying case seems excessively large, for the small filters I got, but is ok. Lens cloth works well too.

This is a great filter kit overall. All three filters work well, and the ND filter is especially useful since it’s adjustable and easy to use. The case they come in is fantastic on it's own especially if you're starting out or don't have a good filter storage option yet. It has individual slots that keep everything separated and protected, and it’s become a permanent part of my main camera kit. I do wish the case had a few more pockets, but considering the compact size, that's probably not a realistic design. For what it's worth, I use these exclusively on a telephoto lens and they work really well. My Lumix G Vario 45-150mm lens is the only one I own that uses 52mm filters so these are almost exclusively for that lens. I've had great results on my Lumix G85, but each camera and even each lens has it's own color science so your results may vary. For example, the optics in my 45-150mm lens leans toward a cool cast. Something to keep in mind while you're testing. Overall, the filters are solid quality and the kit is well thought out. Definitely worth it if you want a reliable starting set for everyday shooting.

Great value for a good working set of variable Neutral Density, Circular Polarizing, and UV filter. For the low price, it's not high end, but it could do the work for most photographers who may need to shoot in bright sunlight with a wide open aperture for shallow depth of field, low ISO, or slow shutter speed to get catch a dreamy flow of the ocean or a waterfall, or cut out reflections from a glass window or surface of a lake, bring out the richness of the blue sky and clouds, or just protect your lens with a clear glass shield.

These filters are well built and pretty good quality, and they even include a nice carry case. Where they save on cost are on the glass and coatings, but you can do a lot with this set. You may not notice artifacts unless you adjust to very strong to maximum darkness settings on the ND filter. If you do that kind of work, you may have to spend a couple hundred for some very pro filters and even they have their limits too. But if you do some post edit work on your images to get the right colors you like, and retouch images anyway, you get a lot for your money here.

Very premium build and excellent quality. I love the case it came with and how well everything was packaged. The filters feel solid and reliable, making this a great kit for photographers who want versatility and protection.