Microscope Eyepiece Type Binocular Microscope Type Compound Light Source Halogen Optical Field of View 22 mm Optical Magnification 0.67X to 45X Maximum Magnification Capability 100X Base Dimensions 6 5/16 in x 5 1/2 in Manufacturers Warranty Length 1 yr Working Distance Fixed Eyepiece Protractor No Features Dark Field High Magnification Observation Infinite Optical System Metallurgical Image Analysis Objective In Bright Three Working Modes