10X-200X Zoom WD100 Continuously Variable 0.7X-5X Adjustable Magnification FHD C-mount Lens For HDMI VGA USB Microscope Camera Feature Working distance:100mm -175mm Connector:C mount Zoom:continouasly variable zoom Objective Magnification:0.7X - 5X(about 10 - 200X on the display) Eyepiece lens adapter:0.4X Fixed position:50mm Locking:0.7X - 5X Locking Auxiliary Objective Lens:0.35X, 0.5X, 2X (optional) Size:132mm(L) * 55mm(DIA)