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Description
Operating with an adjustable 0-to-45 degree tilting base and 7.5x to 45x zoom, the Motic GM-161 Gemological Trinocular Microscope provides dedicated darkfield inclusion analysis for jewelry appraisal desks. Powered by a dependable 0.75x to 4.5x Greenough optical zoom engine (6:1 zoom ratio), it delivers crisp three-dimensional depth and sharp structural rendering across cut stones and mineral crystals. The Siedentopf trinocular head features a dedicated vertical photo port with a fixed 50:50 optical split, letting gemologists record high-resolution digital microphotography while actively viewing through high-eyepoint N-WF 10x/20 mm eyepieces.
Internal inclusion grading is driven by a sub-stage 6V/30W quartz halogen lamp focused through an integrated darkfield condenser with an adjustable manual iris diaphragm that closes from 41 mm down to 2 mm to choke out blinding perimeter glare. Overhead illumination is supplied by a 7W cool white fluorescent lamp on a position-retaining flexible metal gooseneck arm, providing diffuse daylight lighting for surface facet evaluation. The 8.5 kg cast chassis tilts smoothly from 0 to 45 degrees, swivels 360 degrees on its turntable, and includes a heavy-duty coarse focus drive with 125 mm of stroke and an aluminum transit case.
Key Features of Motic GM-161 Gemological Trinocular Microscope
A professional trinocular gemological stereo zoom microscope featuring an iris-controlled darkfield halogen well, overhead fluorescent gooseneck, and an ergonomic 0-to-45 degree tilting base. Combines 7.5x to 45x zoom with a 110 mm working distance, wire stone holder, 50:50 camera port, and widefield 20 mm eyepieces.
- Continuous 7.5x to 45x zoom magnification powered by an 0.75x to 4.5x Greenough engine
- Dedicated vertical photo port with fixed 50:50 optical split for live digital archiving
- Generous 110 mm operational working distance leaves ample room for gemological tweezers
- Integrated darkfield condenser well with adjustable iris diaphragm (41 mm down to 2 mm)
- Base-integrated 6V/30W quartz halogen bulb provides true color metrics for inclusion grading
- Overhead 7W fluorescent lamp on flexible metal gooseneck emits diffuse daylight spectrum
- Ergonomic gemological base tilts smoothly from 0 to 45 degrees with 360-degree rotation
- High-eyepoint N-WF 10x/20 mm widefield eyepieces with bilateral diopter adjustments
Greenough 3D Depth & Darkfield Halogen Core
The converging twin-beam Greenough optical design delivers pronounced stereoscopic relief, making it easy to judge the exact depth of inclusions inside gemstone pavilions. The sub-stage 30W quartz halogen lamp projects high-intensity rays through the stone at steep angles, lighting up tiny internal fractures, carbon spots, and liquid veils like bright stars against an ink-black background. Closing the manual iris diaphragm cuts out stray perimeter light, ensuring clean, definitive clarity grading.
Tilting Base Ergonomics & 50:50 Photo Documentation
Evaluating stones on rigid upright stands leads to chronic neck aches. The GM-161 lets you pivot the entire frame back up to 45 degrees and rotate the base 360 degrees, allowing comfortable eye-level viewing while manipulating the included wire stone clamp. The vertical camera port splits light 50:50, sending clean optical data to external C-mount digital cameras so appraisers can capture certification-grade images for client valuation reports without interrupting manual viewing.
- Tilting base assembly promotes ergonomic posture during prolonged diamond appraisal shifts
- Diffuse 7W fluorescent gooseneck reveals true stone color traits without blinding hot spots
- Included aluminum transit case protects precision optics and mechanics during travel
Motic Five-Year Gemological Warranty Protection
Motic covers the GM-161 Trinocular Fluo with a comprehensive five-year factory warranty covering optical elements, internal prism alignments, and mechanical tilting assemblies, backed by two years on electrical components. The complete factory package contains the GM-161 gemology base and trinocular zoom head, vertical top photo port cover cap, 7W gooseneck fluo lamp, internal halogen block, professional stainless steel wire stone holder, vinyl dust cover, and aluminum industrial transit lock case.
Motic GM-161 Gemological Trinocular Stereo Zoom Microscope 7.5x-45x Fluorescence Illumination Working Distance 110mm Specs
| Brand | Motic |
| Full Model Code / SKU | GM-161 Trinocular Fluo (Camera-Ready Gemology Microscope Workstation Platform) |
| Country of Origin | Germany / China |
| Microscope Type | Professional Trinocular Gemological Stereo Zoom Microscope System with Specialized Rotational and Tilting Darkfield Base |
| Optical System Type | Greenough Stereoscopic Optical Tracking System providing real 3D depth perception and sharp structural rendering |
| Observation Tube Type | Trinocular Head Unit, Siedentopf type with top vertical imaging exit port mapping internal light beam splitter blocks (50:50 split ratio) |
| Tube Inclination & Rotation | 45° comfortable viewing posture tilt, 360° rotating head section, 50-75 mm interpupillary distance tracking adjustability |
| Eyepiece / Field of Number | N-WF 10x / 20 mm (High-eyepoint wide field ocular modules with independent diopter adjustment rings on both tubes) |
| Nosepiece Design | Continuous zoom optical turret layout driven by dual bilateral side-mounted control knobs |
| Objectives Classification | Achromatic Zoom Objective Range with premium anti-reflective surface coatings |
| Objectives Magnification Breakdown | Continuous zoom objective ratio tracking across a 0.75x to 4.5x scaling path |
| Total Magnification Range | Continuous zoom from 7.5x up to 45x parameters with standard 10x eyepieces |
| Focusing Type & Graduation | Heavy-duty coarse focusing system with integrated mechanical tension tuning adjusters; complete focusing stroke range exactly 125 mm |
| Stage Dimensions & Surface Coating | Specialized multi-functional gem stage block measuring 306 x 236 mm with dual-sided mounting threads for auxiliary holding tools |
| Stage Travel Range & Controls | Extended base assembly tracking a full 0° to 45° comfort incline tilt range alongside a complete 360° rotary base layout |
| Condenser Type & Numerical Aperture | Integrated adjustable darkfield iris diaphragm assembly controlling light fields across a Ø41 mm down to Ø2 mm opening profile |
| Illumination Transmitted Type | Base integrated 6V / 30W Quartz Halogen transmissive bulb for precise deep brightfield and darkfield inclusion mapping |
| Illumination Epi-EPI/Reflected | Top frame mounted 7W cool white fluorescent lamp module tracking over a highly flexible, position-retaining metal gooseneck arm |
| Light Intensity Management | Base integrated electronic variable analog rotary potentiometer layout for smooth brightness logging controls |
| Camera Port / C-Mount Adapter Split | Top vertical straight photo exit tube configured for separate c-mount adapter sleeves to mount external digital imaging sensors |
| Contrast Methods Capability | Deep darkfield inclusion analysis, transmitted sample brightfield analysis, incident surface fluorescent color testing, simultaneous digital image data logging |
| Power Supply & Voltage Input | Internal universal switching auto-voltage power state system accepting 100-240V AC electrical currents |
| Physical Dimensions & Net Weight | Chassis depth 391 mm, profile width 236 mm, complete assembly height 515 mm, structure net weight exactly 8.5 kg |
| Standard Package Accessories Included | GM-161 gemology base and trinocular zoom head, vertical top photo port cover cap, 7W gooseneck fluo lamp, internal halogen block, professional stainless steel wire stone holder, vinyl dust cover, aluminum industrial transit lock case |
| Primary Application & Environment | Digital diamond grading workstations, commercial gemstone verification hubs, high-end jewelry appraisal rooms, gemological teaching and research institutes |
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