| Eyepiece focusing range | +/-5D |
| The top point diopter measuring range | -25D-+25D |
| The minimum measuring square value | 0.125D |
| The shuttle lens measuring range | 18△ |
| The shuttle lens square value | 1△ |
| The cylinder lens axial range | 0-180° |
| The cylinder lens axial square value | 1° |
| Maximum diameter of measured lenses | 100mm |
| The Bulb | AC 220V/110V-6V DC3V |