Measurement Range: 0 to ±25D
Minimum: 0.125D graduation up to ±5D, 0.25D graduations over ±5D to ±25D
Cylinder Axis Range: 0 to 180° in 5° steps
Prismatic Power Range: 0 to 5∆ (1∆ interval)
Prism base angle: range of 0 ~ 180 degree
Eyepiece Adjustment: ±5D
Cross Target: makes axes easier to measure
Dimensions: 275mm(h) ×130mm(w) ×455mm(d)
Weight: 5.6 kg
Lamp: LED (comes with spare)
1 year warranty