The Aven 26800C-550 pocket pen-type microscope has a magnification ability of 25X, with a 3.3 mm field of view (FOV), and built-in LED lighting for illumination. This microscope enhances object or image resolution, and is commonly used by hobbyists and professionals in the printing, engineering, dermatology, parts assembly, quality control (QC), collecting, printing, gemology, and entertainment industries. It is used in specimen examination in laboratories before sample preparation, and for printed circuit board inspection, especially for hairline cracks. This microscope is also used in the printing industry for “dot” measurement, and in gemstone examination. This microscope features a glass lens that is housed in a plastic and aluminum body for durability and environmental protection. It has a pocket clip to secure the microscope to clothing or equipment, and comes in a vinyl sleeve. Specifications Optical magnification 25X Lens material Glass Illumination Built-in LED Field of view (FOV) 3.3 mm Eyepiece dimension 0.25-inch outer diameter (OD) Overall dimensions 127 x 20 mm / 5.0 x 1.0 inches (H x W) Weight 1.6 oz. *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 viewing abilities. A trinocular eyepiece is used to output digital images to an internal or external device such as a camera or monitor. 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 use 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. Aven manufactures optical inspection tools, precision tools, and bench accessories for industrial, scientific, and research applications. The company was founded in 1983 and is headquartered in Ann Arbor, MI. What’s in the Box? 26800C-550 microscope. Vinyl cover. Instructions.