I have long used a variable filter from the Hoya brand that I use to sweep at low shutter speeds with the telephoto lens, but this filter, although good, is also expensive and has a much larger diameter than I need for my fixed lenses. and zoom. I've been using it with thread adapters for a long time, but it's a bummer and I've opted to look for a new 62mm filter that is compatible with most of my lenses.

My first option was to buy another one like the one I had, but I saw this K&F Concept at half price, I have been encouraged to try it and the truth is that I liked it a lot. Aesthetically, it has such a good quality, the matte paint of the rings is prone to scratches, but when it comes to the optical part I have no problem.

The filter is slim, apparently it seems bigger than what it is, but it is because of its finishes, compared to Hoya's it is just as fine. As you put it in front of the lens to the minimum, it already goes down 3 steps of light (ND8) and as we turn the ring it is able to go down up to 9 steps (to ND2000) before the famous X appears that all variable ND filters have . The good thing is that the X does not appear in the whole route and that I have not noticed tints produced by the crystals.

In short, a product at a much more moderate price than the veteran brands, which offers a fairly good image quality although aesthetically it has a less careful appearance.