1.Eyepiece focusing range:¡À5D

2.The top point dioptre measuring range:-25D~+25D

3.The minimum measuring square value:0.125D

4.The shuttle lens measuring range:10

5.The shuttle lens square value:1

6.The cylinder lens axial range:0-180¡ã

7.The cylinder lens axial square value:1¡ã

8.The maximum diameter of the measured lenses:100mm

9.The lighting:AC 220v/110v-6v    DC 3v