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AmScope B490 Series Professional Biological Binocular Compound Microscope 40X-2000X Magnification With 3D Mechanical Stage
The B490 series is a top choice for veterinarians, breeders, clinics, and general biological applications, with proven reliability and optical quality. It boasts features such as a compensation-free Siedentopf head, smooth stage translation, and a precision focus system with easy tension and stage-limit adjustment.
The 490 series offers a wide range of optional accessories to expand the functionality. The magnification range can be expanded with a large selection of objective and ocular lenses. Specialized condensers are available for dark-field and phase-contrast applications, ideal for bloodwork, fluid-analysis, and pathology.
To customize the microscope to your viewing comfort, the eyepiece spacing can be easily adjusted using a precision Siedentopf mechanism. A diopter is available on both ocular tubes to compensate for asymmetry, and the ocular tubes are angled at 30° to comfortably accommodate a seated position without neck strain.
The objective turret provides instant access to 4 magnification levels to easily focus in on minute details from 40X to 1000X. Additional 20X eyepieces expand the maximum magnification to 2000X with 8 unique levels. This covers magnifications needed for studying hair follicles, cells, and bacteria. These high-quality lenses are achromatically corrected to improve resolution and color accuracy.
The 2-layer mechanical stage provides smooth and precise movement for examination of specimen slides. The stage's low-position controls are conveniently placed near the coaxial focus knobs for a streamlined workflow. Examining specimen slides is intuitive and precise for users at any skill level.
The LED sub-stage lighting provides cool, energy-efficient illumination. The light-source is daylight balanced to produce natural colors for imaging. The Abbe light condenser has a high 1.25 numerical aperture for oil-immersion, and an iris diaphragm to optimize contrast and depth-of-field. The condenser holder uses rack-and-pinion height adjustment for precision control.
Specifications
| Optical System | Finite-conjugate |
| Mechanical Tube Length | 160mm |
| Head | Binocular, 30° incline, 360° rotatable |
| Interpupillary Adjustment | Siedentopf compensation-free gemel |
| Ocular Diameter | 23mm |
| Eyepieces | 10X, 20X |
| Objective Lenses | DIN standard |
| Objective Parfocal Distance | 45mm |
| Objective Mounting Thread | RMS 20.32mm |
| Objective Turret | quadruple |
| Focusing System | Coaxial coarse and fine focus, upper limit-stop, tension control |
| Focus Range | 30mm |
| Division of Fine Focus | 0.002mm |
| Stage Design | Double-layer with caliper |
| Stage Dimensions | 140mm x 140mm |
| X-Y Translation Range | 75mm x 45mm |
| Transmitted Illumination | Variable-intensity 1.4W LED (7 x 0.2W) |
| Condenser | Abbe condenser with iris diaphragm, NA1.25 |
| Sub-stage Condenser-holder | rack and pinion |
| Power | 220VAC 50Hz |
Objective Lenses
| Magnification | Corrections | NA | Immersion Medium | Cover-glass Thickness |
|---|---|---|---|---|
| 4X | achromatic | 0.10 | — | 0.17mm |
| 10X | achromatic | 0.25 | — | 0.17mm |
| 40X | achromatic | 0.65 | — | 0.17mm |
| 100X | achromatic | 1.25 | oil | 0.17mm |
Packing List:
- Availability: In Stock at Supplier, ETA 7 - 14 days
- Model: B490B-3PL