AmScope FM690 Series Upright Epi-fluorescence Binocular Compound Microscope 40X-2000X Magnification

The FM690B adds epi-fluorescence to our popular 690 series laboratory microscopes, with a wide-spectrum mercury arc-lamp and two standard filter blocks for blue and green excitation bands. This provides high-contrast imaging of fluorescing compounds by isolating bands of light through multi-stage filtering. The microscope's infinity-corrected optical system ensures reliable, low-distortion magnification, with plan-achromatic corrections for accurate colors, excellent field flatness and edge-to-edge sharpness. The halogen illumination system provides low-fatigue, evenly-distributed light for maximum contrast and definition. This model is a popular choice for veterinarians and university laboratories.

The binocular head can be rotated 360° to accommodate viewing from various angles. The binocular viewing tubes are set to a 30° incline and use Siedentopf adjustment to provide a high level of comfort.

The objective turret provides instant access to 4 magnification levels to easily focus in on minute details from 40X to 1000X. Additional 20X eyepieces expand the maximum magnification to 2000X with 8 unique levels. This covers magnifications needed for studying hair follicles, cells, soil, and bacteria. The turret's reversed orientation provides more working room above the stage. These high-quality lenses are achromatically corrected to improve resolution and color accuracy, with planatic flat-field correction to provide edge-to-edge sharpness.

The large 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.

Built on Koehler illumination principals, the sub-stage lighting provides evenly-distributed light for optimal contrast. The halogen light-source provides bright illumination with a lower color-temperature for decreased fatigue when used for long periods. 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, and is centerable for proper alignment. The illuminator's field lens provides an iris diaphragm to control light-spread, optimizing contrast and definition in specimen features.

Fluorescence

The epi-fluorescence illumination system adds incredible versatility to the microscope. The ability to isolate fluorescing compounds allows you to target individual proteins and other nuances. The illuminator uses a high-power mercury arc-lamp for wide-spectrum excitation, with two filter blocks for blue and green excitation, covering a wide range of popular labeling agents and natural fluorophores.

Filters
Filter Set Excitation Filter Emission Filter B 450-490nm 520nm G 510-560nm 590nm
Mercury HBO Excitation
Mercury HBO lamps produce a wide spectrum of wavelengths, including ultraviolet. While this fluorescent light-source can excite fluorophores throughout its entire spectrum, there are peak wavelengths with optimal output. Band Peak Wavelength UV 334nm, 365nm V 405nm B 436nm G 546nm Y 578nm

Packing List:

One binocular head

One microscope body

Four objective lenses: 4X, 10X, 40X, 100X

One pair 10X eyepieces

One pair 20X eyepieces

Three color filters

One fluorescence illuminator housing

One power unit for fluorescence illuminator

One 30W halogen bulb

One 100W mercury bulb

One spare fuse

Two power cords (US and Canada standard)

One dust cover