Feature:1. APPLICABLE OBJECTS: 180X zoom lens, adjustable magnification, suitable for VGA USB industrial video microscope camera.2. HIGH DEFINITION IMAGE: High definition, high depth three dimensional image, the lens body zoom is flexible and comfortable, and easy to operate.3. ZOOM AND MAGNIFICATION: Objective lens magnification power is 0.7‑4.5X (approximately 10‑180X on monitor), working distance is 125mm, zoom ratio is 6.5:1.4. EASY INSTALLATION: C mount microscope camera lens, C mount design, easy to install on the microscope, easy to observe the internal structure of the object.5. DURABLE IN USE: Selected high quality alloy materials, sturdy and durable, corrosion resistant, wear resistant, not easy to damage, and long service life.Specification:Item Type: C Mount LensMaterial: AlloyPurpose: Suitable for VGA USB industrial video microscope camera for electronic inspection, jewelry inspection, LCD, crystal inspection, etc.Working Distance: Approx. 125mm / 4.9inZoom C Mount Lens: 0.5x C Mount AdapterZoom Ratio: 6.5:1Objective Lens Magnification Power: 0.7-4.5X (approximately 10-180X on a 22in monitor)Maximum Multiple Field of View: Approx. 2.8x1.5mm / 0.11x0.06inMinimum Multiples Field of View: Approx. 25x14mm / 0.98x0.55inLens Length: Approx. 168mm / 6.6inLens Diameter: Approx. 50mm / 2.0in Package List:1 x C Mount LensNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. The bottom of the lens is factory adjusted to fix the lens with exposed glue, which is normal.