AmScope B490B Compound Binocular Microscope
- 40X to 2000X in eight steps
- 4X, 10X, 40X and 100X DIN achromatic objectives
- WF10X and WF20X eyepiece pairs
- Halogen light, variable intensity, brightfield condenser
- Double layer mechanical stage, coaxial coarse and fine focus
- 5 year manufacturer warranty, 17.2 pounds
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A bench microscope for a clinic, classroom or lab that needs oil-immersion power. It is optical viewing only, without a camera or computer link.
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ASIN: B004UI5QT8Model: B490BCategory: Compound Binocular Microscopes
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Overview
A lab bench or classroom desk is where this metal-framed binocular microscope belongs. A tilted, swiveling head, a double layer mechanical stage and coaxial focus knobs support slide work at eight magnification steps.
The reason to buy is a full range of objectives, two eyepiece pairs, immersion oil and spares in one kit. The limit is that the listing includes odd entries, such as a computer compatibility field and a 240 volt rating next to a 6V spare bulb.
Who it's for
A lab bench with a wall outlet and space for a heavy microscope fits it well. Skip it if you need a portable field scope, a battery model or a built-in camera.
Pros and cons
- Eight magnification steps
- Variable halogen light
- Spares and oil included
- Five year warranty
- Heavy bench unit
- No camera included
- Voltage listing unclear
- Corded power only
Performance notes
Magnification comes from multiplying the objective by the eyepiece, which is why eight steps are available from four objectives and two eyepiece pairs. The 100X objective is used with immersion oil for the highest power. Variable light intensity helps with stained and pale slides.
Specifications
| Brand | AmScope |
|---|---|
| Model | B490B |
| Dimensions & fit | |
| Item dimensions l x w x h | 20"L x 17"W x 10.5"H |
| Item weight | 17.2 pounds |
| Power & efficiency | |
| Power source | Corded Electric |
| Voltage | 240 volts |
| Construction & materials | |
| Enclosure material | Metal |
| Color | White |
| Warranty & support | |
| Warranty description | 5 year manufacturer |
| Other details | |
| Magnification maximum | 2000 x |
| Objective lens description | Achromatic |
| Light source type | Halogen |
| Real angle of view | 30 degrees |
| Builtin media | Microscope |
Frequently asked questions
Is the AmScope B490B a digital microscope?
No. It is an optical binocular microscope. The listing mentions computer compatibility, but no camera is in the box list.
What comes in the box?
A binocular head, body and base, DIN objectives, WF10X and WF20X eyepieces, a spare bulb, color filters, a spare fuse, a power cord, a dust cover, immersion oil and a user's manual.
What is the power rating?
The specs list 240 volts, while the box includes a 6V/20W spare halogen bulb, so check the power supply before using it.