The National Optical 106-LED Basic Monocular Compound Microscope has a 10x widefield eyepiece with pointer, a forward-facing nosepiece with three achromatic objectives, LED illumination, coarse focus, a disc diaphragm, and a plain stage with stage clips. An eyepiece pointer is used to identify features for students. Achromatic objectives provide color correction of magnified images. A forward-facing nosepiece eases changing objectives. The 40xR objective is retractable and spring-loaded to prevent damage to the slide or objective when focusing. Rotation positions with secure, positive stops ensure accurate positioning. A basic compound microscope is used in classroom, home school, and hobbyist settings for inspection and dissection of specimens when two-dimensional images are desired. The microscope has lower (diascopic) Brightfield illumination that transmits light up through the specimen for enhanced visibility of translucent and transparent objects. Brightfield (BF) illumination allows the specimen to absorb light, resulting in a dark image on a light background. LED light source provides bright light, and a disc diaphragm controls the amount of light illuminating the specimen. The plain stage has an opening for light transmission, and stage clips to secure the slide or specimen in place while viewing. The coarse focus eases use for young viewers, and a rack-and-pinion mechanism provides precise and secure focusing. Focus tension control prevents stage drift. A built-in slip clutch system prevents damage to the focus mechanism and a stage stop prevents the stage or specimen from coming into contact with the objectives. The cast metal frame provides durability and has a gray enamel finish. Microscope Head and Optics SpecificationsHeadMonocularMagnification range40x-400xEyepieceWF10x with pointerNosepieceForward-facingObjectives, achromatic4x, 10x, 40xR (retractable)Microscope Illumination and Stage SpecificationsFocus typeCoarseLight sourceLEDDiaphragmDiscIllumination typeBrightfieldStage typePlainStage dimensions88 x 82mm (W x D)PowerRechargeable nickel metal hydride (NiMH) batteriesW 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 National Optical 106-LED Basic Monocular Compound MicroscopeWF10x eyepiece4x achromatic objective10x achromatic objective40xR achromatic objective(3) rechargeable AA NiMH batteriesDust coverInstructions
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