The shutter is a removable drawer-like unit. The flat part is inside the instrument housing (the cube) and the left hand side box (with motors/encoders) outside.
| Aperture size | 110mm x 109mm |
| implemented/delivered | Dec. 1998 |
| Instrument | Bonn University Simultaneous Camera ( BUSCA) |
| Telescope | 2.2m |
| Observatory | Calar Alto |