XTL-3400 Stereo Microscope Optics system: Inner inclination optical viewing system Zoom ratio: 1:6.5(0.7X-4.5X) Eyepiece: 10X Objective: 0.7X-4.5X Total magnification: 7X-45X Working distance: 95mm Linear field: 5.1mm-33mm Interpupillary adjustable range: 55mm-75mm Illumination: Halogen lamp or LED lamp Height of microscope adjustable With camera adapter, C-mount 1/3" camera attachable