Feature:1. Applicable Model: C Mount Lens with 90100mm or 3.5 x 3.9in working distance, can be widely used for industrial video microscope camera.2. Adjustable Magnification: The magnification is 0.74.5X (about 20300X X on the display), zoom ratio is 6.5:1, stable and reliable performance.3. Field of View: Maximum multiple field of view is 1.4mm x 0.8mm, and the minimum multiple field of view is 10mm x 5mm, 1X eyepiece Lens.4. Sturdy Material: C Mount Lens is made of high strength aluminum alloy, rugged structure, impact resistant, rustproof and long lasting.5. Easy to Install: The microscope camera c mount lens is easy to install on the microscope and observe the internal structure of the object.Specification:Item Type: C Mount LensMaterial: Aluminum AlloySize: Approx. 25mm or 1inWorking Distance: Approx. 90-100mm or 3.5 x 3.9inZoom Ratio: 1:6.5Magnification: 0.7 - 4.5X (about 20 - 300X display)Maximum Multiple Field of View: 1.4mm x 0.8mmMinimum Multiple Field of View: 10mm x 5mmEyepiece Lens: 1XSize: Approx. 245 x 50mm or 9.6 x 2in (L x DIA).Package List:1 xC Mount Lens