Theory:Video Microscope Drawtube:Monocular Type:C-mount Lens Microscope Zoom range:0.6-5x Zoom Ratio:1:8.3 Working Distance:86mm Objective:Apochromatic objective 2X CCD adapter:0.5x Illumination:Coaxial illumination Light source:Halogen Lamp with Reflector 21V 150W Camera:1080P HDMI camera Application:Industrial inspection