Magnification : 21x to 135x (field of view: 10.7mm to 1.6mm)
Objective Lenses : 1.4x to 9x (zoom ratio 6.4 : 1)
Eyepieces : Wide Field 15x (DHW15X), Field Number 15
Optical Body : 360 deg. rotatable binocular type, 45 deg. inclined eyepiece tubes
Working Distance : 84mm
Interpupillary Distance : 50mm to 74mm
Diopter Adjustment : +/- 7.2D on both eyepiece tubes