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AmScope B390 Series Darkfield Binocular Compound Microscope with 20W Halogen, Oil Condenser and Optional Digital Camera
This darkfield microscope is a top choice for veterinarians and clinics. High quality optics and precision mechanics have made this time-tested design a favorite for labs across many industries. Specialized darkfield optics allow you to observe live cells including blood and other fluids.
The binocular head can be customized for each user, with a sliding interpupillary adjuster for varying eye spacing, and diopters for both eyes to fine-tune focus for nearsighted users and for asymmetry. The head can be rotated 360°, and has a 45° incline for viewing while seated or standing. Interchangeable eyepieces allow for an expanded magnification range, or the use of special eyepieces with pointers and measuring reticles.
The objective turret provides instant access to 4 magnification levels to easily focus in on minute details from 40X to 1000X. 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.
An oil darkfield condenser is included for darkfield observation using high-power objective lenses. The condenser is designed for use with immersion oil, and can accommodate higher numerical-aperture lenses. Two centering screws allow you to properly center the condenser for optimal contrast. Darkfield observation will provide contrast in otherwise indistinguishable objects by highlighting changes in refractive index. This is particularly useful for observing live cells including blood analysis.
Specifications
| Optical System | Finite-conjugate |
| Mechanical Tube Length | 160mm |
| Head | Binocular, 45° incline, 360° rotatable |
| Interpupillary Adjustment | sliding, 55-75mm |
| Ocular Diameter | 23mm |
| Eyepieces | 10X |
| Objective Lenses | DIN standard |
| Objective Parfocal Distance | 45mm |
| Objective Mounting Thread | RMS 20.32mm |
| Objective Turret | quadruple |
| Focusing System | Coaxial coarse and fine focus |
| 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 50mm |
| Transmitted Illumination | 20W halogen |
| Condenser | Abbe condenser with iris diaphragm, NA1.25, Ø 32mm filter holder NA1.25-1.36 oil darkfield condenser with centering knobs |
| Sub-stage Condenser-holder | rack and pinion |
| Power | 100-240VAC 50/60Hz wide-band |
| Dimensions | 11" x7-1/2" x 15-3/4" (28cm x 19cm x 40cm) |
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 |
