AmScope B390 Series Darkfield Binocular Compound Microscope with 20W Halogen and Optional Digital Camera

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This darkfield microscope provides enhanced contrast at low and intermediate magnifications. High quality optics and precision mechanics have made this time-tested design a favorit e 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. A dry darkfield condenser is included for darkfield observation using the 40X objective lens or lower. With a 0.9 numerical aperture, the condenser works with non-immersion 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 holderNA0.7-0.9 dry 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 Packing List:One Binocular Microscope with 4 DIN Objectives One pair 10X eyepieces One power cord (US and Canada standard) One mirror for ambient lighting One dust cover Three color filters One spare halogen bulb (6V/20W) One spare fuse One sample bottle of immersion oil One dry darkfield condenser Show more