The National Optical D-ELB Binocular Compound LED Microscope has 18mm, 10X widefield eyepieces with achromatic 4X (0.10 Numerical Aperture [NA]), 10X (0.25 NA), 40XR (0.65 NA), and 100XR oil-immersion, color-coded, achromatic lens objectives to create two-dimensional images for biological use and educational applications. The achromatic lenses provide clarity and color correction of magnified images, and meet Deutsches Institut für Normung (DIN) standards. The quad objective turret is ball-bearing mounted for precise positioning of objectives. One eyepiece has a pointer to identify areas of interest on a specimen. Illumination is provided by a 3.4V 0.06-watt LED with rheostat control for adjusting the amount of light projected on the specimen. The coaxial coarse-focusing control with tension adjustment and the graduated fine-focusing control provide sharp focus. The microscope's stage features a built-in specimen holder with a stage stop mechanism to protect slides. It has an Abbe condenser with rack and pinion focusing, an iris diaphragm, and a swing-out frosted filter holder. The microscope is made of cast aluminum with a gray enamel finish. It comes with a 4.5V-DC power adapter for 110V to 220V.
|Eyepieces||10X (18mm) widefield|
|Objective lenses||DIN standard 4X, 10X, 40XR, and 100XR achromatic|
|Viewing configuration||Binocular with 30 degree incline and 360 degree rotation|
|Illumination||3.4V 0.06-watt LED illumination with variable rheostat control|
|Focus||Coaxial coarse and fine focusing controls, coarse has tension adjustment, fine is graduated|
|Stage||115mm x 125mm (4-1.2 in. x 5 in.) with built-in specimen holder|
|Condenser||1.25 NA Abbe|
|Housing construction||Cast aluminum with gray enamel finish|
|Illumination power source||4.5V DC power adapter for 110V to 220V|
|Base dimensions||350 x 140 x 210mm/13-3/4 x 5-1/2 x 8-1/4 inches (H x W x D)|
H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.
Microscopes are instruments used to enhance the resolution of an object or image. Types include compound, stereo, or digital. Compound microscopes use a compound optical system with an objective lens and an eyepiece. Stereo microscopes show object depth in a three-dimensional image. Digital microscopes are used to display an image on a monitor, rather than looking through a lens. Microscopes can have monocular (one), binocular (two), or trinocular (three) eyepieces, with varying magnification abilities. Magnification ability refers to the size of an image. Resolution, also known as resolvant power, refers to the clarity of the image. The interaction between field of view (FOV), numerical aperture (NA), and working distance (WD) determines resolution. Microscopes can control magnification through a fixed focus, or through a range of adjustments. They can also utilize LED, fluorescent, and mirror light sources to help control viewing capabilities. Microscopes are widely used in education, lab research, biology, metallurgy, engineering, chemistry, manufacturing, and in the medical, forensic science, and veterinary industries.
National Optical and Scientific Instruments manufactures microscopes and microscope cameras. The company, founded in 1991, is headquartered in Schertz, TX.
What's in the Box?
- National Optical D-ELB - Binocular Compound LED Microscope
- 4.5V DC power adapter for 110V to 220V