Vertex power
range
+15D-20D
step
0-(+-)10D for 0.125D（+-）10D-(+-)15D for 0.25D
Prismatic power
range
4 prism diopter
step
1 diopter
Cylindrical axis
range
0 to 180 degrees
step
1 degree
Lenses accommodated
Diameter 20 mm to 80 mm: DC and AC
Eyepiece focusing
- 5D to +5D
(DC)3V, (AC)6V/3W
