Specifications
Eyepiece Adjustment	+/- 5D
Measured Lens Diam.	o20 - o80mm
Bulb	6V/3W
Sphere range	-15D -> + 15D steps .125D from 0 -> +/- 10, .25D for rest
Axis range	0 -> 180 degrees, 5 degree step
Weight	5.6 Kg
Prism range	0 -> 4 prism units 1 prism diopter steps
Lamp	220/110V 15W