One half of the Hoya Half NDx4 filter is clear while the other is a 4x Neutral Density (2 stops) with a soft boundary between the two.
| Type | Half Neutral Density (ND) x 4 |
| Size | 52 mm |
| Grade | Not applicable |
| Filter Factor | +2 stops |
| Multi-Coated | No |
| Rotating | Yes |
| Effect | Allows bright skies to be easily controlled for dramatic effect; Used to control bright/dark contrast, by reducing half the shot by 2 stops |
| Application | Useful in landscape photography |
| Color Temperature | Not applicable |
| Construction | Glass |
| Front Filter Thread Size | 52 mm |
| Front Lens Cap Size | 52 mm |
| Warranty | One-Year |