Range of Measurement of Spherical Lenses
Combination of two sphere power dials +16.75D to -19.00D in 0.25D steps by rotation of only the weak sphere dial or B1, B2 knob. Can also adjust sphere power in 3 diopter steps with the major sphere dial.

Range of Measurement of Cylinder Lenses
0.00D to -6.00D with 0.25D steps. Available in plus or minus cylinder. A pair of 0.12D cylinders in accessory cells permits refinement to 1/8thD steps. A pair of 2.00D cylinders in accessory cells extends cylinder power range to 8.00D.

Cylinder Axis
360 degrees (Doubles 0 to 180 degree scale) with 5 degree markings.

Cross Cylinders
The standard cross cylinder cells supplied are +/-0.25D (+/-37D and +/-0.50D cross cylinders are available as optional parts)

Rotary Prisms
Each rotary prism unit has a range of 20 with 1 scale graduation. Paired prisms give 40 in any base direction.

PD Adjustment Range
48mm to 75mm with mm scale graduation

Vertex Distance
13.75mm

Reading Distance
5″ to 28″ (Centimeter and Diopter scales)

Auxillary Dial
10 auxillary lenses and two open aperatures. “O” (open aperature), “R” (retinoscope lens, +1.50D), “P” (polarizing lens), WMV, WMH (Maddox Rod, White, vertical or horizantal) left eye, RMV, RMH (Maddox Rod, Red, vertical or horizantal) right eye, “RL” (Red Lens), “+12″ (+0.12 sphere lens), “PH” (pin hole), “6U” (6 base-up prism), “+/-0.50″ (+/-0.5 fixed cross cylinders), “OC” (occluder)

Net Weight
10 lbs.

Gross Weight
14.5 lbs.