AmScope B490B-50P100S Binocular Biological Microscope with 2000X Magnification and 20W Incandescent Light Source
Key Features
- 40X to 2000X magnification range for studying a range of specimens including hair follicles, cells, and bacteria. 10X and 20X eyepieces provide 8 unique magnification settings.
- A top choice for veterinarians, clinics, and classrooms, this microscope provides high quality optics and precision mechanics.
- Professional features include a Siedentopf binocular head for precise adjustments, a 2-layer mechanical stage with low-position controls, and coaxial coarse and fine focus for ergonomics and an efficient workflow.
- Halogen lighting reduces eye-strain for prolonged use.
- A large compliment of optional accessories are available for darkfield and phase-contrast.
- Includes 50 blank slides and 100 cover slips for dry and wet mount specimens.
Choose the viewing head and illumination that fit your workflow.
Four professional configurations built around the same finite-achromatic optical platform and precision mechanical stage.
One professional family.
Four configurations.
Compare head type, camera readiness and illumination technology at a glance.
| COMPARE AT A GLANCE | B490 | B490-LED | T490 | T490-LED |
|---|---|---|---|---|
| Viewing head | Siedentopf binocular | Siedentopf binocular | Siedentopf trinocular | Siedentopf trinocular |
| Dedicated camera port | No | No | Yes | Yes |
| Simul-focal | No | No | Yes | Yes |
| Illumination type | Transmitted | Transmitted | Transmitted | Transmitted |
| Light source | Incandescent / halogen | LED | Incandescent / halogen | LED |
| Illumination power | 20W | 1.4W | 20W | 1.4W |
| Magnification family | 40X-1000X / up to 2500X | 40X-1000X / up to 2500X | 40X-1000X / up to 2500X | 40X-1000X / up to 2500X |
| Eyepieces | 10X / 16X / 20X / 25X | 10X / 16X / 20X / 25X | 10X / 16X / 20X / 25X | 10X / 16X / 20X / 25X |
| Objective set | 4X / 10X / 40X / 100X oil | 4X / 10X / 40X / 100X oil | 4X / 10X / 40X / 100X oil | 4X / 10X / 40X / 100X oil |
| Optical design | Finite achromatic | Finite achromatic | Finite achromatic | Finite achromatic |
| Condenser | Abbe NA 1.25 | Abbe NA 1.25 | Abbe NA 1.25 | Abbe NA 1.25 |
| Darkfield condenser | Dry option | - | Dry and oil options | - |
| Condenser adjustment | Rack-and-pinion | Rack-and-pinion | Rack-and-pinion | Rack-and-pinion |
| Power compatibility | 110 VAC, 60 Hz | 110 VAC, 60 Hz | 110 VAC, 60 Hz | 110 VAC, 60 Hz |
| Camera bundles available | Yes | Yes | Yes | Yes |
The B490 is our hardest-working go-to microscope. The top choice for veterinarians, breeders, and clinics, this instrument has 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-adjustment and vertical-lock.
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 halogen sub-stage lighting provides bright illumination with excellent color rendering. The warm lighting is better suited for prolonged use, causing less eyestrain than LED and fluorescent lighting. 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 movement for precise height adjustment.
This kit includes 50 blank slides and 100 cover slips for dry or wet mounting specimens to view with your microscope.
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 | 20W halogen |
| Condenser | Abbe condenser with iris diaphragm, NA1.25 |
| Sub-stage Condenser-holder | rack and pinion |
| Power | 110VAC 60Hz |
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:
| ASIN | ASIN:B00O9GQN3O |
| camera connection type | N/A |
| compatibility | None |
| illumination style | Transmitted (Bottom) |
| magnification power config | 40X-2000X |
| Manufacturer | AmScope |
| microscope application | College, Teaching/Training |
| microscope category | Compound |
| microscope color | White, Black |
| microscope condenser design | Abbe-Spiral w/ diaphram |
| microscope condenser optics | NA 1.25 |
| microscope condenser type | Brightfield |
| microscope eyepiece power | 10X, 20X |
| microscope eyepiece size | 23mm |
| microscope field view | Widefield |
| microscope head style | Binocular |
| microscope iris | With Iris |
| microscope light power | 20W |
| microscope light shape | Built-in |
| microscope light type | Halogen |
| microscope magnifying power | 40X to 2000X |
| microscope number of bulbs | 1 |
| microscope objective power | 4X, 10X, 40X, 100X |
| microscope objective size | 20mm |
| microscope optics | Achromatic |
| microscope power supply | 110V |
| microscope stage | Two-layer Mechanical Stage |
| microscope stage div | 1.00mm |
| optics | Achromatic |
| product condition | NEW |
| prop 65 |
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