- Brand
- Kase
- Lens Diameter
- Marked on each lens, independent of camera body; common sizes include Φ77 mm, 58 mm, 67 mm, 55 mm. The lens diameter is usually printed on the front or side of the lens.
- Function
- Converts smaller lens diameters to larger filter diameters, enabling multi-use of one lens with various filters.
- Material
- Lightweight anodized aluminum for durability.
- Compatibility
- Designed for use when the filter diameter is larger than the lens diameter.