300X 450X 600X Feature:300X Working distance:80mm-165mm450X Working distance:75mm-110mm600X Working distance:80mm-100mmConnector:CS C mountZoom:continouasly variable zoomMagnification:0.35X - 2.8X (about 35-300X on the display)0.525X - 4.2X (about 55-460X on the display)0.7X - 5.6X (about 75-610X on the display)Fixed position:50mmPackage incluede:1 x FHD Zoom C-mount Lens(Optional)1 x W050 Barlow Lens(Increase working distance) 1 x W075 Barlow Lens(Increase working distance)