Specification:
1. External reading type with prism compensator.
2. Range of measurement:+20 to -20 diopters
3. Minimum scale value :0.125 ( -5D to 5D) , 0.25 (beyond -5D to 5D)
4. Range of ocular visibility adjustmen:-5 to +5 diopter
5. prism basal angle :0 to180 degree .1 degree step
6.110V or 220V/25W
Model CP-1
Specification:
1.portable lensmeter
2. Range of measurement:+15 to -20 diopters
3. Minimum scale valu:0.125 ( 0 to +/-10D)
4. Range of ocular visibility adjustmen:-5 to +5 diopter
5. prism basal angle :0 to180 degree .1 degree step
6.3V(DC) or 6V(AC)/3W
