مكان المنشأ
Guangdong, China
Vertex Power Range
+15D ~ -15D steps
Vertex Power Step
0 ~ (+/-)10D (0.125D) (+/-)10D~(+/-)15D, (0.25D)
Prismatic Power Range
4 prism diopter, 1D step
Cylindnical Axis Range
0° ~ 180°, 5° Steps
Max. Lenses Accommodated Diameter
80mm
Eyepiece Focusing
-5D ~ +5D
AC Power Supply
AC 110 V, 60 Hz; AC 220 V, 50 Hz
DC Power Supply
DC 3 V, 2 x 5# batteries
Dimension
300 x 170 x 70 mm