This kit bundles three essential filters—the UV protector, circular polarizer (CPL), and a variable neutral density (ND2-400) filter—designed for 67mm lenses in the Nano-K (or equivalent) line of K&F CONCEPT. It’s aimed at photographers wanting to cover protection, polarized scenes, and light control without assembling separate pieces.

✅ Pros

High optical quality & excellent coatings: Reviewers highlight the smooth build, strong glass, and no noticeable colour cast or “X-pattern” when using the ND component.

Versatile kit: From everyday protection (UV) and reducing reflections (CPL) to long-exposure or bright shoots (variable ND), this gives wide coverage.

Good value for money: Compared to buying separately, the bundle offers strong performance at a more accessible price point.

❌ Cons

Variable ND curve limitations: As with many adjustable ND filters, at the darkest settings you may still see vignetting, or slight exposure shifts especially on wide lenses.

Single size (67 mm): You’ll need step-up or step-down rings if your other lenses use different thread sizes.

Kit complexity for beginners: Having several filters is great, but figuring out when and how to use them (especially the variable ND) still requires some experience.