TW-1005 Portable Lensmeter   

Vertex Power Range:

+15 diopter to -15 diopter;
Vertex Power Step:
0-(±)10D for 0.125D
(±)10D-(±)15D for 0.25D;

Prismatic Power Range:

4 prism diopter;
Prismatic Power Step:1diopter;

Cylindrical Axis Range:
0 to180 degrees;
Cylindrical Axis Step:5 degree;

Lenses Accommodated:
Diameter 20mm to 80mm;

Eyepiece Focusing:-5D to +5D;

Bulb: 6V/3W;