Description: Zoom c-mount Lens for industry digital microscope camera. Objective magnification power by 0.7 - 4.5X(about 10 - 300X on the display) The work distance:100mm-120mm Monocular 300X industry zoom c-mount Lens 0.5X C-mount adapter. Specification: Type:Zoom c-mount Lens Material:PVC+Glass Size: 17mm(L) * 45mm(DIA) Work Distance:100mm-120mm Material:Metal Color:Black Magnification:300X Package Includes: 1 Piece 300X Zoom C-mount Lens