Welcome to our store! 1、Applicable Model: C mount lens with 90-100mm / 3.5 x 3.9in working distance, can be widely used for industrial video microscope camera. 2、Adjustable Magnification: The magnification is 0.7-4.5X (about 20-300X X on the screen), 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、Durable Material: C Mount Lens is made of high strength aluminum alloy, sturdy structure, impact resistant, rustproof and long lasting. 5、Easy to Install: Microscope camera c mount lens is easy to install on the microscope and observe the internal structure of the object. Item Type: C Mount Lens Material: Aluminum Alloy Size: Approx. 25mm/1in Working Distance: Approx. 90-100mm / 3.5 x 3.9in Zoom Ratio: 1:6.5 Magnification: 0.7 - 4.5X (About 20 - 300X Screen) Maximum Multiple Field of View: 1.4mm x 0.8mm Minimum Multiple Field of View: 10mm x 5mm Eyepiece Lens: 1X Size: Approx. 245 x 50mm / 9.6 x 2in (L x DIA) 1 x C Mount Lens