Specifications:
1. Range of measurement: 0D to ±20D
Minimum: 0.125D graduation up 0D to ±5D
0.25D graduation over ±5D to ±25D
2. Cylinder axis range: 0~180° step 1°
3. Prismatic power range:
Prism diopter of pattern A: 0-5 prism diopters,1△ graduations
Prism diopter of pattern B: 0-20△ prism diopters,1△ graduations (with prism compensation device)
4. Prism base angle:
0 to 180 degree,minimum scale value 1 degree
180 degree to 360 degree Minimum scale value 5 degree
5. Eyepiece adjustment: ±5D
6. Dimension of objective lens: Φ16 ~ Φ80MM
7. Overall size:27.5(L)*13(W)*45.5(H)(CM)
8. Weight: Pattern A: 5.6KGS
Pattern B (with prism compensation device):5.7KGS
9. Lighting bulb: 220V/110V 15W
