GM171 7.5X - 50X Zoom Jewelry Microscope and Case

Summary

The GM171 gem microscope combines the classic Motic SMZ171 7.5X-50X stereo microscope head with a modern brightfield/darkfield gem stand in an efficient, affordable tool for the gemological and precious minerals industry. Rugged and precise, the GM171 optics offer higher magnification than the GM161, helping users perform identification and analysis quickly and efficiently. A generous 110mm working distance allows easy access and manipulation of the gem. Available in binocular or trinocular version for digital documentation, they feature a swivel base which rotates 360 degrees and tilts 45 degrees to assist client viewing. The microscope comes with a foam-padded aluminum carrying and storage case. Lifetime Limited Warranty.

Microscope Head

The SMZ171 stereo head is an excellent choice for jewelry and gem stone inspection at an affordable price. The parfocal zoom ratio is 6.7:1, offering a magnification range of 7x-50x with dual-sided zoom controls and a working distance of 110mm. The head is inclined 45° and includes lnear sliding interpupillary adjustment of 50mm-75mm.

High Eyepoint widefield 10X/F.N.23 eyepieces come standard, offering dual dioptric adjustment and a broad field of view ranging from 30.67mm to 1.33mm. Optional eyepiece powers include 15X and 20X, for additional magnification of 75X and 100X respectively, without the loss of working distance. Finally, the microscope is available in binocular or trinocular format to easily capture digital images for documentation, promotion or client use. Please note that a trinocular adapter is required to fit your camera.

Illumination & Stage

Brightfield / Darkfield illumination is from powerful and consistent 6V30W variable-intensity Halogen with an aperture diaphragm adjustable from 41mm to 2mm. This allows depth of field and contrast control for easier stone identification. Incident illumination is provided by a 7-watt, 6000-degree color temp fluorescent light box on a flexible goose neck arm. The stage offers two mounting points for a gem holder and inclusion pointer along with adaptation for optional contrasting methods like immersion or polarization.

Stand

The professional gem stand features dual focus controls for precise movement through 125mm of vertical range, to accommodate different gems and stones. An integral swivel base allows 360-degree rotation and the arm inclines 45 degrees for flexible viewing positions by jeweler or client.