A solid variable ND filter. The filter is machined really well and the overall fit and finish is excellent. The orange anodized tab looks really good and adds a nice aesthetic in addition to aiding in adjustment. The dial is smooth enough to not unscrew from the lens but is firm enough to not drift once it is set in place. All of the shots I used the ND filter on confirmed the filter is good for between 1 and 5 stops and I never got any weird patterns with any of the settings. There is a slight color cast that leans toward blueish which is similar to every other ND filter I have ever used but it is easily fixed in post. Spring can be unpredictable and it can be a huge pain to swap filters between clouds a variable ND filter is convenient as well as cutting down on the number of pieces to bring shooting.

The pouch/holder is nicely made but bulky. A more compact hards case would be preferable but it is anice add-on at this price point. Sometimes I wish the filter had some kind of click or stop at the different stops but overall it's not a huge issue. It would be nice to preset the stop in this way, but not a deal breaker.

Overall the picture quality is good and the K&F ND filter is a solid buy at the price point. It has less color shift than other cheaper filters and work the investment.