The K&F Concept 67mm variable ND filter for phones is a surprisingly capable little kit for anyone who wants to push their smartphone photography and video a bit further. True to K&F Concept’s reputation, the build quality is solid without being overly expensive, making it an appealing entry point for creatives who want to experiment with light control without investing in a full camera setup.The kit comes in two main parts: a sturdy clip and the 67mm variable ND filter. Attaching the clip to your phone takes a little bit of patience, as it can take a few tries to get it seated securely without any wobble. Once in place, though, it holds well, and the soft-touch padding that rests against the screen is a thoughtful touch that prevents scratches or pressure marks. The 67mm size is generous enough to cover all the lenses on my iPhone 14 Pro, which meant I could use the regular, ultra-wide, and telephoto lenses without any vignetting issues.The filter itself is a bit chunky, but it doesn’t feel awkward or overly heavy on the phone. It sits nicely on the clip, and adjusting the ND strength is as simple as twisting the filter to the desired setting. This makes it very easy to dial in the right amount of light reduction, whether you’re trying to capture motion blur in bright daylight or achieve a more cinematic look in video.Another big advantage of this being a 67mm system is compatibility. You can use other standard 67mm filters with the clip, opening the door to polarizers or other creative filters if you want to expand your setup later. Everything also comes neatly packed in a small case with a lens wipe and strap, which makes it easy to carry around and keep clean.The main downside is that initial setup can be a bit fiddly, especially when positioning the clip perfectly over the lens. Once you’ve done it a few times, though, it becomes much easier.Pros- Solid K&F Concept build quality- Good value for money- Covers all lenses on larger phones- Simple twist adjustment for ND levels- Compatible with other 67mm filters- Comes with case, lens wipe, and strapCons- Clip can take a few tries to position correctlySummaryA well-made, affordable, and versatile ND filter kit that gives smartphone shooters far more control over light and creativity, with only minor setup quirks holding it back.