When using the Kalt Soft Spot filter, only a circular section of the subject in the center of the image is reproduced sharply.
This lens is made for the older Hasselblad lenses with a filter size of Bayonet 50.
| Type | Center Spot |
| Size | Bay 50 |
| Grade | Not applicable |
| Multi-Coated | No |
| Rotating | No |
| Effect | Center sharp - Surrounding details fade out in a blurred effect |
| Application | Portraiture |
| Color Temperature | Not applicable |
| Construction | Glass |
| Front Filter Thread Size | Bay 50 |
| Front Lens Cap Size | Bay 50 |