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.

I needed a complete kit because until now I only had an old UV filter whose brand I didn't even know, and I wanted to start taking more polished photos by better controlling light and reflections. This K&F Concept pack has exactly what I was looking for: a UV protection filter, a circular polarizer (CPL), and a variable ND filter that ranges from 2 to 400.

The UV filter serves a dual purpose: on the one hand, it physically protects the front element of the lens from potential bumps or scratches, and on the other, it blocks ultraviolet radiation that can cause blue casts or loss of contrast. I leave it on all the time as basic protection. The polarizer is proving incredibly useful for improving my outdoor photos; it eliminates those annoying glares that appear on water or wet surfaces and makes the colors appear richer and more saturated. You just have to rotate it until you find the right angle, and the change is immediate.

The variable ND filter is incredibly practical because with just one filter, you get nine adjustable stops of light reduction. I've mainly used it for recording video with shallow depth of field on very bright days without overexposing, and also for photographing waterfalls with a silky effect during the day. It works perfectly in the intermediate settings, although at the higher settings, a slight color cast or cross-hatching can appear in the corners if using very wide-angle lenses.

The construction is solid, the rings are machined aluminum, and the glass has water- and grease-repellent coatings. They come in a practical case with compartments for each filter. For the price, I consider it a very worthwhile purchase for anyone who wants to improve their photography without breaking the bank.

This kit is great for the price. My only gripe is that the ND filter displays an X pattern at very high ND numbers, however it is to be expected with such a high range of ND values possible and it’s great for the price anyway.