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 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, 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	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:

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

Three color filters (blue, green, yellow)

One spare halogen bulb

One spare fuse

One sample bottle of immersion oil

One pack 50pc blank slides

One pack 100pc cover slips