Features: Made of high quality aluminum alloy, it is sturdy and durable. Zoom c-mount Lens, 120x, the object can be enlarged and the image is clear. The workmanship is exquisite, the image is bright and clear, and the effect is excellent. Eyes are not easily fatigued during observation to protect your eyesight. It is suitable for all kinds of optical microscopes and is easy to install. Widely used in microelectronics, molds, precision machinery, jewelry, watches, jewelry, fingerprint identification, ticket identification, printing, mobile phone repair, archaeology, biological anatomy, school teaching and other fields. Especially suitable for observing the surface microstructure of large objects. Specifications: Condition: 100% Brand New Material: Aluminum Alloy Magnification: 120 times Working distance: 50mm-350mm Field of view: 3.1mm-66mm zoom c-mount Lens zoom ratios: 5:1 Magnification Power by 0.11X - 2X Ring adapter: 35mm(default) Size: Length: approx. 100mm / 3.9in Standard C interface: approx. 25mm / 1in Diameter: approx. 35mm / 1.4in approx. 28mm / 1.1in Package list: 1 * Lens