Product description:
INS-11064 Portable Lensmeter
Dimensions: 9 x 6 x 2 in / 23 x 15 x 5 cm
Weight: 2 lb / 1 kg
Specification:
Vertex Power: Range: - 15.00 D to + 15.00 D / Step: 0.125 D ( 0.00to +10.00 D) 0.25 D (over +10.00 D)
Cylindrical Axis Range: 0 to 180 degrees / Step 5 degrees
Prismatic Power Range: 4 prism diopters Step l prism diopter
Maximum Lens Diameter: 80 mm
Eyepiece Focusing + 5.00 D or over
Power DC 3 volts (2 AA size dry batteries) 50 MW