A special stereo microscope setup for the inspection of gems and minerals. The Greenough optical system delivers clear and distortion-free images in a zoom of 6:1, giving a magnification range of 7.5X-45X in standard outfit. The implemented click-stops allow precise reproduction of magnification for measurements. The instrument comes with a special transmitted/incident illumination adapted to the specifics of translucent precious stones.
GM-161 Standard Specification Comparison |
▾ GM-161B | ▾ GM-161T | |
Optical system | Greenough | |
Observation tube | Binocular head | Trinocular head |
Trinocular light split | / | Fixed 50:50 |
Observation angle | 45°/ 60° | 45° |
Objective system | Zoom; ratio 1:6 | |
Objectives magnification | 0.75X~4.5X | |
Auxiliary ESD objectives | 1.5X (WD = 56.3mm) 2.0X (WD = 38.6mm) |
|
Interpupillary distance | 50-75mm | |
Height of eye point | 405mm | |
Stage | Mounting hole for gem holder on both sides. Users can choose the position freely | |
Eyepiece(s) | Widefield N-WF10X/20mm, +/- 5 cross reticle on one eyepiece | |
N-WF 12.5X/18; 15X/16; 20X/13 optional | ||
Working distance (standard) | 110mm | |
Focusing adjustment | 125mm | |
Incident illumination | 7W fluorescent light, colour temperature of 6000K to reduce any yellowing effects on the gem, angle adjustable | |
Transmitted illumination | 6V/30W Halogen | |
C-Mount adapter | / | |
0.5X, 0.65X, 1X adapters available | ||
Photo adapter | / | SY10 photo adapter 2.5X, 4X photo eyepiece available |
Length x width x height | 391 x 236 x 500mm | |
Weight | 8.2kg |