I. Product Overview
The EX-21 series comes with configurations including binocular, trinocular and digital observation heads (20-megapixel). It adopts an infinity-corrected optical system and compound eye illumination, supporting observation modes such as bright field, phase contrast and simple polarization. The binocular/trinocular observation head features a 30° tilt and hinged design, with an interpupillary distance ranging from 47 to 75 mm and an 8:2 light splitting ratio for the trinocular version. The digital model has a built-in 20-megapixel chip, enabling full-HD dynamic and static image capture, real-time WiFi output, and is equipped with professional image analysis software. Combined with the infinity-corrected optical system and high-performance compound eye illumination system, the EX-21 delivers uniformly illuminated, clear and bright images at any magnification. Boasting a user-friendly design, it is simple and convenient to operate, and can be easily mastered even by students. Like all ABN microscopes, the EX-21 maintains excellent reliability and durability for heavy-duty use in the education market. Featuring a compact body and a built-in charging adapter, it is suitable for intensive educational applications and widely used in biological teaching, basic medicine, agricultural research and other fields.
II. Equipment Parameters and Specifications
objective lens
| Category | Parameter Details |
|---|
| optical system | Infinite Apochromatic Optical System, Sunny Optical Group |
| observation head | 30° Tilted hinged binocular / trinocular, pupil distance 47-75mm; trinocular light splitting ratio R:T=8:2; digital model equipped with a 20-megapixel observation tube |
| eyepiece | PL10X/18mmor PL10X/20mm, high-eye-point wide-field flat objective, diopter adjustable, Sunny Optical Group |
| Infinity Plan Achromatic (4X/10X/20X/40X/60X/100X); Infinity Plan Positive Phase Contrast（10X/20X/40X/100X） |
|
| converter | Recessed four-hole / five-hole, coded type optional |
| Focusing mechanism | Coarse-fine coaxial, coarse adjustment travel ≥25mm, fine adjustment accuracy 0.002mm, with tightness adjustment and upper limit stop |
| Stage | 150×140mm or 150×162mm double-layer composite, travel range 76×50mm, accuracy 0.1mm, dual section holders |
| Lighting system | Compound eye illumination with adjustable brightness, compatible with brightfield / phase contrast / polarized light / darkfield |
| Digital Configuration (Digital Version) | 2000 Megapixel chip, full HD dynamic/static capture, WiFi output, image analysis software |
| body | Compact design with built-in adapter and internal storage box |
### III. Functional Features
Compound-eye illumination and uniform lighting: The compound-eye illumination system improves lighting uniformity on the specimen surface, delivering consistent brightness across the entire field of view, high contrast ratio and soft illumination to reduce fatigue during long-time observation. Ningbo Sunny Instruments Co., Ltd.
High-definition optics and flat-field imaging: Infinity-corrected flat-field achromatic / positive phase contrast objectives paired with high-eye-point wide-field flat-field eyepieces correct distortion and color fringing at the edge of the field of view for sharp imaging and accurate color reproduction. Sunny Group.
Ergonomics and easy operation: 30° inclined observation head, interpupillary distance ranging from 47 to 75 mm and ±5 diopter adjustment. Coarse and fine coaxial focusing (fine focusing precision: 0.002 mm) with tension adjustment and upper limit stopper to protect slides and objectives.
Support for multiple observation modes: Brightfield, phase contrast, simple polarization and darkfield modes are available, suitable for observing various samples including cells, bacteria, transparent specimens and birefringent substances.
Digital and wireless expansion (digital model): Equipped with a 20-megapixel sensor, it supports WiFi connection with multiple terminals. The image analysis software enables photo capture, measurement, annotation and data archiving. Ningbo Sunny Instruments Co., Ltd.
Optimized durability and storage: Curved body design without sharp edges, built-in storage compartment and integrated power adapter for easy transportation and desktop management.
### IV. Application Scenarios and Fields
Biology teaching: Observation of cell structures, analysis of tissue sections and identification of microbial morphology, suitable for practical training in middle schools and universities.
Basic medicine: Preliminary diagnosis of pathological sections, blood cell counting and observation of bacterial cultures to support preclinical research.
Agricultural research: Anatomical observation of plant tissues, seed germination monitoring and microscopic morphological analysis of pests and diseases to facilitate breeding and plant protection.
Environmental monitoring: Detection of microorganisms in water bodies and observation of soil protozoa to assess ecological environment quality.
Industrial quality inspection: Microbial testing of food and purity observation of cosmetic raw materials to ensure product safety.
### V. Technical Advantages
1. Advanced compound-eye illumination: Superior lighting uniformity compared with traditional Köhler illumination, with no vignetting across the full field of view to enhance the recognition of fine details in transparent specimens.
2. Stable optical performance: Infinity-corrected flat-field objectives combined with flat-field eyepieces deliver excellent peripheral image quality, ideal for comparative observation by multiple people in teaching.
3. Safe and reliable operation: Coarse and fine coaxial focusing plus upper limit stopper prevent collision between slides and objectives. Non-detachable eyepieces make it suitable for student use.
4. Efficient digital integration (digital model): 20-megapixel sensor, WiFi connectivity and analysis software enable rapid data sharing and archiving, improving teaching interaction and research efficiency.
5. Durability and easy maintenance: Robust body and integrated power adapter reduce failure rates, suitable for high-frequency usage scenarios.
Device appearance drawing
Full HD image
