The AmScope SM1BSX64S professional stereo zoom microscope has a pair of 10x superwidefield high eyepoint eyepieces, a 0.7x4.5x zoom objective, a 0.5x Barlow lens, and a pillar stand. The microscope has an overall magnification range of 3.5x45x. The binocular viewing head has an interpupillary range of 55 to 75mm, a 45degree inclination to reduce eye and neck strain, and 360degree rotation to enable sharing. The WH10x20mm superwidefield higheyepoint eyepieces combine with the 0.7x4.5x zoom objective to provide 7x45x continuous zoom magnification and a longer working distance for inspecting largescale specimens that require handling or repair. Higheyepoint objectives ease viewing for users who wear glasses, and dioptric adjustment accommodates individual eyestrength differences. The microscope includes a 0.5x Barlow lens that can be added to the objective to decrease the magnification to 3.5x22.5x. A Barlow lens with a magnification of less than 1.0 reduces magnification and increases the working distance. A stereo microscope, sometimes called an inspection or dissection microscope, has low magnification and a long working distance that enables users to manipulate the object being inspected.The removable 64bulb LED ring light provides bright, cool light for working with temperaturesensitive or live specimens. The ring light provides shadowfree illumination, and a rheostat controls the amount of light emanating from the lamp. Power and adjustment controls are located on the light head. The light uses a 110V240V variable power supply. The table stand has a reversible black and white stage plate that provides contrast with light and darkcolored specimens, and stage clips to secure the specimen in place. The stage plate has a 33/4 diameter (95mm). The stand is 10 x 77/8 x 103/4 inches/254 x 200 x 275mm (H x W x D, where 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). SpecificationsHeadBinocularMagnification range7x45x, continuous zoom; 3.5x22.5x with Barlow lensZoom objective power0.7x4.5xEyepieces (DIN, 30mm)WH10x20mm higheyepointZoom range6.5:1Field of view range3/16 to 11/4Optical working distance8Microscope standPillarHead movementXaxisIllumination typeEpiscopic (reflected)Light source64bulb led ring light with rheostatPower110V240VMicroscopes 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 SM1BSX64S stereo zoom microscope with pillar stand WH10x20mm eyepieces, 30mm, one pair 0.7x4.5x zoom objective 0.5x Barlow lens 64bulb LED ring light with power supply (LED64S) Eye guards, one pair Stage clips, one pair Dust cove