I’m really happy with this K&F Concept lens set so far. Each filter fits my Canon 58mm lens perfectly and threads on smoothly without feeling loose or wobbly. The glass quality looks very clear, and I haven’t noticed any unwanted color tinting, distortion or vignetting in my shots so far. My camera has not any issues with focusing either. The UV filter has been great just using it for everyday protection. I feel the CPL helps cut down the glare and deepen the skies nicely, and the ND2-400 gives me a ton of flexibility when shooting outdoors and if I’m working with slower shutter speeds. It’s a solid setup that helps give your shots a step above the rest. The case provided that houses the lenses is very well built and does an awesome job at keeping things scratch-free & organized. For the price, you’re getting a really outstanding well built filter set that any camera owner would be proud to have. Plus it’s a well-made set of filters that perform far better than I expected. I have so many different lenses but this kit contains a great variety and an all in one setup- that’s value for your money right there.