| ertex power | range | +15D-20D |
| step | 0-(+-)10D for 0.125D(+-) | |
| Prismatic power | range | 10D-(+-)15Dfor0.25D |
| step | 4 prism diopter | |
| Cylindrical axis | range | 1diopter |
| step | 0 to 180 degrees | |
| Lenses accommodated | Diameter 20mm to 80mm | |
| Eyepiece focusing | -5D to +5D | |
| DC and AC | (DC)3V(AC)6V/3W | |