GM171 Binocular
Greenough zoom optical system
Binocular head, 45º inclined, 360º rotating
Widefield adjustable eyepieces N-WF10X/23mm
6.7:1 Zoom ratio, WD=110mm
Objective magnification range: 0.75X-5X
Specialised gemmology tilting base, 0º to 45º tilting range: 360º rotary base
Coarse focusing system with tension adjustment
6V/30W halogen brightfield/darkfield illumination with intensity control
Flexible gooseneck 7W fluorescent incident illumination
Wire gem holder
Aluminium carrying case and dust cover