In order to vary the magnification of the beamexpander while still keeping the focus at infinity, two lens elements have to be moved. In the C-ZBE these movements are not actuated by a single adjustment ring, but have been kept separate as 2 adjustment rings, labelled X and Y.
| Part Number | Diameter | Length | Magnification |
| C-ZBExx | 96 mm | 242 mm | 1 - 8 zoom |