ST0850 Zoom Stereo Microscope
The ST0850 is a stereo zoom microscope with a 0.8X to 5X zoom range, supplied on an L4 or L5 stand.

Product Overview
The ST0850 is a stereo zoom microscope with a 0.8X to 5X zoom range, supplied on an L4 or L5 stand. It features a 45o inclined binocular or trinocular head with a 115mm working distance, allowing hands-on work under the optics during precision tasks. The Greenough optical system provides a true stereo view across the zoom range. Standard illumination includes LED incident and transmitted light, with optional ring light and auxiliary objectives for extended use.
- Optical systemGreenough
- HeadBinocular / Trinocular
- Head angle45o inclined
- Zoom ratio6.3:1
- Magnification range0.8X~5X
- Working distance115mm
Key Benefits
- 115mm working distance allows space for tweezers, probes, soldering irons or tools under the head
- 0.8X to 5X zoom ratio covers locating a component and inspecting fine details without changing objectives
- 45o inclined binocular or trinocular head reduces neck strain during prolonged use
- LED incident and transmitted illumination included as standard for consistent lighting
- Optional ring light and auxiliary objectives extend functionality to specific inspection or assembly tasks
Application Scenarios
- Jewellery repair and gemstone setting where tools and hands work under the optics
- Precision watchmaking and micro-assembly with a clear view of small parts and solder joints
- Inspection of small mechanical components and moulded plastic parts in a production line
- Teaching micro-assembly techniques in a vocational or technical training lab
- Gemstone and mineral surface inspection with adjustable lighting and magnification
Who It Is For
- Jewellery and watchmaking workshops requiring hands-on inspection
- Precision assembly and rework teams in electronics and micro-mechanical industries
- Teaching labs in technical schools and vocational training centres
- Quality control teams inspecting small parts with consistent lighting
- Gemologists and mineralogists examining surface features and inclusions
Problems It Solves
- A fixed working distance or short reach limits tool clearance during hand assembly or rework
- Lack of stereo depth perception in flat-screen digital microscopes makes fine manipulation difficult
- Insufficient illumination leads to shadows or glare on reflective or textured surfaces
- No option to add a camera or ring light forces separate purchases that may not match the optical system
- Fixed magnification or limited zoom range requires frequent objective changes during inspection
Technical Features
- Greenough optical system delivers true stereo depth perception across the zoom range
- 45o inclined binocular or trinocular viewing head for ergonomic viewing posture
- 0.8X to 5X zoom ratio with 6.3:1 magnification span for continuous adjustment
- 115mm working distance maintains clearance for tools and hands under the optics
- Interpupillary adjustment 52mm to 75mm for user-to-user handover and comfort
- Standard LED incident and transmitted illumination for consistent lighting
- Optional LED ring light for even surface illumination on reflective or curved objects
- Auxiliary objectives 0.5X, 0.75X, and 2X available to adjust working distance and magnification
Specifications
| Optical system | Greenough |
|---|---|
| Head | Binocular / Trinocular |
| Head angle | 45o inclined |
| Zoom ratio | 6.3:1 |
| Magnification range | 0.8X~5X |
| Working distance | 115mm |
| Interpupillary adjustment | 52mm-75mm |
| Eyepiece | WF10X/F.N.22mm (standard) |
| Optional eyepieces | WF15X/F.N.16mm, WF20X/F.N.12mm |
| Auxiliary objectives | 0.5X, 0.75X, 2X |
| Illumination | LED incident, LED transmitted (standard) |
| Optional illumination | LED ring light |
| Optional accessories | Round plate ΓΈ125mm, white&black plate |
| Stand model | L4, L5 (standard configurations) |
Specifications are taken from the AMADA product data for this item. Confirm critical dimensions with us in writing before ordering.
Customization Options
- Choose between binocular or trinocular head on the same ST0850 body
- Add optional eyepieces WF15X/F.N.16mm or WF20X/F.N.12mm for higher magnification
- Attach auxiliary objectives 0.5X, 0.75X, or 2X to adjust working distance and magnification
- Add optional LED ring light for even surface illumination
- Select between L4 or L5 stand configurations for bench or floor mounting
Comparison With Other Options
| ST0850 without LED illumination | The standard model includes LED incident and transmitted illumination; the non-illuminated version lacks built-in light sources. |
|---|---|
| ST0850 with flat head | The 45o inclined head reduces neck strain during long sessions; a flat head requires constant posture adjustment. |
| Digital microscope with LCD screen only | The ST0850 maintains binocular stereo depth perception for hand work, while a screen-only digital microscope lacks depth cues. |
Use Guide
- Adjust the interpupillary distance between 52mm and 75mm before focusing to ensure a merged image
- Set the zoom to the lowest magnification (0.8X) before focusing, then increase to avoid focus shift
- Use the 115mm working distance to position tools and components safely under the optics
- Switch between incident and transmitted illumination depending on sample transparency and surface reflectivity
- Attach the ring light only when inspecting curved or reflective surfaces to reduce glare
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Frequently Asked Questions
What is the working distance under the standard 0.8X-5X zoom?
115mm. This allows clearance for tools like tweezers, probes, or soldering irons under the head.
Can I use this microscope for jewellery repair?
Yes. The 115mm working distance and 45o inclined head are designed for precision hand work in jewellery and watchmaking.
Does the microscope come with illumination?
Yes. Standard models include LED incident and transmitted illumination. An optional LED ring light is available.
Can I add a camera to this microscope?
The source text does not list a camera. You can add a C-mount camera via the trinocular port if needed, but this is not supplied with the standard unit.
What optional objectives are available?
Available auxiliary objectives are 0.5X, 0.75X, and 2X, which adjust working distance and magnification.
Which stand is included with the ST0850?
The ST0850 is supplied on either an L4 or L5 stand. Specify your preference when requesting a quote.
Request A Price On The ST0850 Zoom Stereo Microscope
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