have been universally happy with the 8 K&F products I have purchased so far, so I was excited to try out their True Color Variable ND CPL filter. Like my other K&F products, the build quality is very high - probably their best yet. The filter rotates very smoothly with just the right amount of resistance to be assured it will stay where you set it. Unlike other variable NDs, this one has orange coloured tabs sticking out that make it easy to turn. It is even labelled, in very small print, to show how much ND it is set to - from 1 to 5 stops. If you are used to how NDs are named in the film production world, this variable ND goes from ND 0.3 to ND 1.5. ND 1.5 in my experience is about as high as we ever use on set. I didn’t realize this until after a few weeks of using this filter, but the “CPL” in the product name actually refers to Circular Polarizer. This is the first and only variable ND I have ever seen that you can also use as a fully-adjustable polarizer filter as well! All variable NDs use two polarizers to darken the image, but the K&F actually lets you rotate the pola independently of the ND setting. Amazing! This variable ND also beats any others I have used because it does not add any colour shift to your image, even at the strongest ND setting, AND it does not suffer from the black cross effect that most other VNDs give you. At $119 Canadian dollars as I write this, it is not an inexpensive filter, but you definitely get what you pay for with optical glass. If you care about image quality, it just does not make sense to put cheap glass in front of your expensive lenses. Very Highly recommended!