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 16X eyepieces expand the maximum magnification to 1600X 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, 16X 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 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: One binocular head One microscope body Four objective lenses: 4X, 10X, 40X, 100X One pair 10X eyepieces One pair 16X eyepieces One power cord (US and Canada standard) One dust cover Two color filters One sample bottle of immersion oil
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