Perfect for small opticians, domiciliary opticians, field work and students.
Accurate measurement with simple, robust mechanical components
Specifications
Sphere:0 ~ ±15D (0.125D / 0.25D steps)
Cylinder: 0 ~ ±15D (0.125D / 0.25D steps)
Axis: 0 ~ 180° (5°steps)
Eyepiece Focusing:-5D ~ +5D
Prism:0~4 (1D steps)
Dimension: 300 x 170 x 70 mm
Weight: 1KG with base
Power Supply:DC 3V, 2xAA Batteries