Used, as everyone knows. A gem that came out while cleaning. Manufacturer: Kenko Product Name: Color Temperature Conversion Filter W4 Diameter Size: Φ55mm Color: Amber-toned filter Purpose: Light during cloudy or rainy weather has a high color temperature, and the entire screen tends to appear bluish. Effect: Color temperature reduction → For shooting in shade, cloudy, or rainy weather (slightly darker color) Condition: Almost unused → Only opened and briefly attached to a lens. Photo ①: Filter appearance Photo ②: Case appearance - front Photo ③: Case appearance - back Photo ④: Label - Diameter size and type notation Photo ⑤: Case contents (label removed) A must-have item for shooting with reversal film, etc.