This is just one of many K&F filters I have in my kit and, like all their other products, is well made. This is one solid chunk of glass and the surfaces are cleanly cut and free of blemishes. It comes in a protective plastic case and includes 3 cleaning cloths.

Now, this is obviously not a filter you're going to use all the time. It creates a fun kaleidoscope effect that is best reserved for very specific moments, as it's a very strong effect. I like that the filter rotates, so once you have it screwed onto your lens, you can either creates a rotating effect (video) or dial in the exact angle for stills.

Due to the nature of this type of filter, it is a bit chunky and heavy, as it needs to be thick enough to get the crystal facets at properly steep angles. I got the largest size (82mm), as it offers the most versatility since I can always use reducer rings on smaller diameter lenses, but you generally can't go the other way around (small filter on a larger diameter lens). This ensures the widest lens compatibility.

Overall, I'm quite pleased with this filter. It'll be a nice addition to grab a shot here or there for music videos and art pieces. K&F has consistently delivered great quality at an affordable price and this filter continues that streak of success.