I use UV filters to protect the front elements of my expensive lenses from accidental damage. In the years that I've been invested into photography as a hobby I broke two filters but my lenses survived unscathed.

The idea behind owning an expensive lens is that it provides superior image quality and handling. When mounting an additional glass element in front of that lens, it's important to make sure that the quality of the filter is good enough not to diminish the quality of the fancy, exotic glass used in such a lens.

I have to say that the K&F Concept 77mm UV filter exceeded my expectations. Optically, directly comparing it to my B+W filter there is very little difference. The reflections are well controlled, clarity is excellent and in use I simply cannot tell a difference between the two, despite a large price gap.

The built quality is very nice, the filter is thin, yet still easy to put on and remove thanks to well machined grooves on the edges. It threaded smoothly on my two compatible lenses. The included lens cap is a nice bonus, although my Canon lens cap works fine.

Overall, for the money, this is a great choice for a premium UV protector!