The AmScope M158CPS25WM monocular compound microscope has interchangeable 10x widefield and 25x widefield eyepieces, a forwardfacing nosepiece with three DIN achromatic objectives, rheostatcontrolled LED illumination, coaxial coarse and fine focus, a 0.65 NA singlelens condenser, and a plain stage. The forwardfacing revolving nosepiece has 4x, 10x, and 40x DIN achromatic fullglass objectives that provide highresolution colorcorrected images. The monocular viewing head has one 10x widefield eyepiece on a fixed 45degree vertical inclination to reduce eye and neck strain and 360degree rotation capability to provide a more comprehensive view and enable sharing. A compound microscope is used for inspection and dissection of specimens when twodimensional 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 illumination provides bright, cool light for working with temperaturesensitive or live specimens. Rheostat control capability allows the viewer to control light intensity. The 0.65 NA singlelens condenser and disc diaphragm control the amount of light illuminating the specimen. The plain stage is 31/2 x 31/2 inches and has an opening for light transmission and stage clips to secure the slide or specimen in place while viewing. A stage stop prevents the stage or specimen from coming into contact with the objectives. Coaxial coarse and fine focus knobs are nested to speed focusing for leftand righthanded viewers. All mechanical components are constructed of metal for precision and durability, and the solidmetal frame has a stainresistant enamel finish. The microscope is powered by a 110VAC adapter (included) or by three AA batteries (sold separately) for field use. The microscope comes with a set of 25 prepared slides of a variety of plants, animals, and minerals, and The World of the Microscope book. SpecificationsHeadCompound monocularEyepiecesWF10x, WF25xObjectives4X, 10x, 40x achromaticStagePlainLighting configurationTransmitted (lower)CondenserSingle lensDiaphragmDisc diaphragmLight sourceLED with rheostatIllumination typeBrightfieldPower110V/60Hz or three AA batteriesMicroscopes 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 threedimensional 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.United Scope manufactures microscopy equipment and accessories under the brand name AmScope. The company, founded in 1996, is headquartered in Irvine, CA. Whats in the Box? AmScope M158C microscope with plain stage WF10x eyepiece WF25x eyepiece 4x DIN achromatic objective 10x DIN achromatic objective 40x DIN achromatic objective Set of 25 prepared slides The World of the Microscope book (2) Stage clips Dust cover 110V power adapter Instructions