Haida HD4221Specs
| Filter Type | Variable ND |
| Density | 0.9 (3 Stops) to 3.0 (10 Stops) |
| Shape | Circle |
| Circular Size | 67 mm |
| Front Accessory Thread / Bayonet | 67 mm |
| Filter Material | Glass |
| Ring Material | Aluminum |
| Coatings | Multi-Coating |
| Filter Type | Variable ND |
| Density | 0.9 (3 Stops) to 3.0 (10 Stops) |
| Shape | Circle |
| Circular Size | 67 mm |
| Front Accessory Thread / Bayonet | 67 mm |
| Filter Material | Glass |
| Ring Material | Aluminum |
| Coatings | Multi-Coating |