1. Product Overview
The ABN SZ series by Greenough Optical Systems consists of continuous zoom stereo microscopes, with core models including SZ45 and SZ45N. Built around a 0.67–4.5× continuous zoom objective lens (6.7:1 zoom ratio), paired with 10× eyepieces, it delivers standard magnification ranging from 6.7× to 45×. Optional eyepieces and auxiliary objective lenses can extend the magnification range to 2×–225×, enabling seamless switching from low-magnification panoramic viewing to high-magnification detail inspection. The 45° inclined, 360° rotatable observation head accommodates various operating postures. Its standard 100 mm working distance provides ample space for manipulation. Optical components with special coatings ensure flat image planes and good contrast. This series is widely applied for high-precision observation and inspection in electronics, biomedicine, scientific research and education. It features premium optical systems and durable, reliable operating mechanisms, complete accessories and diverse combinatorial configurations to meet high-precision requirements in modern biology, medicine, scientific research, on-site inspection for the modern electronics industry and other technical industrial sectors.
II. Equipment Specifications
Zoom objective lens
| Category | Parameter Details |
|---|
| observation head | 45° tilt, 360° rotatable binocular / trinocular, interpupillary distance 54-76mm, diopter adjustment on both sides (±5 diopters), trinocular light splitting ratio 20%/80% |
| eyepiece | Comes standard with WF10X/22mm. High-eye-point wide-field eyepieces such as WF15X/16mm and WF20X/12mm are optional, with adjustable diopters. |
| 0.67-4.5X continuous zoom, zoom ratio 6.7:1, parfocal image plane, standard working distance 100mm |
|
| auxiliary objective lens | 0.5X (Working Distance 177mm), 0.7X (116mm), 1.5X, 2X, etc., extension magnification and working distance |
| Focusing mechanism | Vertical arm type coarse and fine coaxial focusing, travel 50mm, adjustable and lockable tension, fine adjustment accuracy 0.002mm |
| Lighting system | LED / halogen lamps with adjustable brightness. Ring lights, fluorescent lamps and others are available to suit multi-sample illumination. |
| Total magnification | Standard: 6.7X-45X, Extended: 2X-225X (with different eyepieces and auxiliary objectives) |
| Working distance | Standard: 100 mm, Extended: 26–287 mm (depends on the auxiliary objective lens) |
III. Functional Features
Precise Magnification and Stable Zoom: 0.67–4.5X continuous zoom with a zoom ratio of 6.7:1. It delivers good parfocal performance. The zoom handwheel is arranged on both sides for comfortable operation and high repeat accuracy.
Excellent Optical Performance: The Greenough optical system is paired with wide-field flat-field eyepieces. Special coatings ensure a flat image plane and high contrast across the large field of view, with bright and clear image quality at peripheral fields.
Ergonomic Design: 45° inclined and 360° rotatable observation head. Interpupillary distance is adjustable from 54 mm to 76 mm, with diopter adjustment (±5 diopters) on both sides, adapting to different users and operating postures.
Flexible Magnification Expansion: When equipped with auxiliary objectives such as 0.5X/0.7X/1.5X/2X, the total magnification can be extended to 2X–225X to meet various observation requirements.
Ample Working Distance: Standard working distance of 100 mm. Optional auxiliary objectives can extend the working distance to 26–287 mm, providing sufficient space for operations.
Multiple Observation Head Options: Binocular or trinocular heads are available. The trinocular version has a 20%/80% light splitting ratio, compatible with camera systems to support image capture and analysis.
### IV. Application Scenarios and Fields
Electronics Industry: PCB/SMT solder joint inspection, LCD/IC assembly verification, mobile phone motherboard repair, electronic component pin reshaping
Biomedicine: small animal dissection, embryo manipulation, cell culture observation, histological analysis
Scientific Research and Teaching: biological/material demonstration for universities, microstructure research of archaeological relics, geological mineral observation
Industrial Manufacturing: precision component assembly, appearance inspection of tiny structures, mold wear examination, micro-defect observation of auto parts
Other Fields: textile raw material inspection, food processing quality control, fine inspection of printed materials, micro-defect detection of jewelry
### V. Technical Advantages
Mature optical system: Greenough optical system equipped with special coatings, featuring flat image plane with large field of view, high-contrast erect image and excellent image quality at peripheral field of view.
Comfortable and efficient operation: 360° rotatable observation head and dual-side zoom handwheels reduce fatigue during long-time operation and improve working efficiency.
Flexible magnification expansion: The combination of continuous zoom and auxiliary objective lenses achieves a total magnification range of 2X-225X to meet diverse observation requirements.
Sufficient working distance: The standard working distance is 100 mm, which can be extended to 26–287 mm to adapt to various operation needs.
Stable, reliable and durable: High-quality optical and mechanical components together with a stable focusing mechanism ensure stability and precision for long-term use.
Device appearance drawing
