Specifications:
Sphere power: range:+16.75 to -19.00 diopters; step: 0.25 diopters
Cylinder power: range: 0.00 to -6.00 diopters (0.00 to -8.00 diopters with additional lens of -2.00 diopters); step: 0.25 diopters
Cylinder axis: 0 to 180, 1 degree steps
Cross cylinder:  .25 diopters
Rotary prisms: 0 to 20, min. 1 step
Auxiliary lens dial: (O)-Open aperture (two positions),    (R)-Retinoscopic lens +1.50D,                      (P)-Polarizing lens 45mm- left eye 135mm- right eye,    (WMV)or(RMV)-Maddox rod-Vertical white-left eye & red-right eye,    (WMH)or(RMH)-Maddox rod-horizontal white-left eye & red-right eye, (RL)-Red lens,   (PH)-Pin hole,   (10) or (6) -10 base-in-left eye, 6 base-up-right eye (dissociating prisms),   (+/-0.50)+/-0.50 fixed cross cylinder,   (0C)-Occluder
P.D. adjustment: 48-75mm in 1mm steps
Standard accessory lenses: two .12D and -2.00D cylinder lenses, two plano lenses for sealing of the front opening
Standard accessories: 1 near point card with holder and reading rod, dust cover, face shield, accessory case for lenses
Dimensions: 318 x 293 x 96 (mm)
Net weight: approx 10lbs