The inverted format of this microscope offers the ability to view a wide range of specimen types and shapes. The 5W LED episcopic illumination system provides reflected illumination for opaque specimens such as metals, minerals, and manufactured materials. The trinocular viewing head allows you to attach a camera for recording images or to view specimens on a screen. This microscope is ideal for metallurgy and geology labs. Using four plan-achromatic objective lenses from 5X to 50X, a broad range of magnifications can be covered. These highly corrected lenses produce sharp, flat images from 50X to 1250X when used with the included 10X and 25X eyepieces. A inverted metallurgical/metallographic microscope with Plan optics Wide band power supply system from 90V to 240V for international use Trinocular head for adding photo/video capability Fully coated optical system with high resolution Four Plan objectives included Variable-intensity LED illumination Large mechanical stage with stain resistant finish Coaxial coarse and fine focusing Focusing tension control mechanism Low position stage traveling controls Full optical glass elements Dual side focusing controls Adjustable interpupillary distance Adjustable diopters on both eye tubes Specifications Head: 45 degree inclined trinocular Nosepiece: quadruple Focusing Range: 1-5/16" (33mm) Interpupillary Adjustment Range: 2-3/16" - 3-0" (55 - 75mm) Mechanical Tube Length: 6-5/16" (160mm) Camera/Video Trinocular Port: 23mm universal/standard photo tube Eyepieces: 10X, 25X Objectives: Plan Achromatic 5X (0.1 NA), 10X (0.25 NA), 20X (0.40 NA), 50X (Spring, 0.65 NA) Stage Dimensions: 7-3/32"x 6-1/8" (180x155mm) Stage Traveling Range: 3-0"x 1-9/16" (75x40mm) Venire Division: 0.00004" (0.001mm) Illumination: 5W LED, 90V-240V wide band Packing List:One Trinocular Microscope One pair 10X eyepiecesOne pair 25X eyepieces Four Plan Achromatic Metallurgical Objectives, 5X, 10X, 20X and 50X One Power Cord Dust Cover