I used it only once. I bought it new on Amazon for 13,168 yen. Brand: K&F CONCEPT Material: Optical glass Photo filter thread size: 72 mm Photo filter effect type: Variable ND filter Photo filter factor: 2 X Photo filter size: 72 mm [Yellowing Correction Possible] The TRUE COLOR ND2-ND32&CPL filter adopts new titanium coating technology, effectively solving the problem of yellowish screens during video shooting and enabling original color reproduction. The exterior may be a mix of old and new, but the contents are the same. [Integrated into One] The ND2-32&PL filter, a 2-in-1 lens filter, is a multi-functional filter that combines a variable ND filter with light adjustment and a PL filter with circular polarization. The filter removes reflections from non-metallic surfaces, making the sky more vivid and resulting in beautiful, vibrant photos. It is ideal for removing reflections when the subject and reflected light are at a 90-degree angle. [High-Quality Optical Glass & Multi-Layer Coating] The variable ND filter uses high-quality optical glass and a multi-layer coating on both sides to effectively reduce reflected light on the filter surface. It is treated with a superior water and oil repellent 28-layer coating, making it easy to wipe away water droplets and dirt. [Easy to Attach/Detach & Anti-Reflection] The outer frame of the lens filter has a CNC trapezoidal pattern with knurling to prevent slipping, making it easy to attach and detach from the lens. Sandblasting is applied to prevent reflections as much as possible. [With Filter Case] The included filter case allows you to pull out the filter by pulling the string on the side, making it very convenient to carry.