| Code No. | Description |
|---|---|
| 202-1850 | Lens system - magnification 5x |
| 54-650 | Lens system - magnification 10x |
| 202-1852 | Lens system - magnification 20x |
| 202-1853 | Lens system - magnification 25x |
| 202-1854 | Lens system - magnification 50x |
| 202-1855 | Lens system - magnification 100x |
