The Seiler Microlux IV LED Compound Microscope (#MLX817-LED) comes with five Infinity Corrected Plan Objectives: 4x, 10x, 20x, 40x, and 100x for sharper images and virtually no aberrations. Warranty: Lifetime Limited (Optics and Mechanics) - Free from Defects / 3 Years (Electronics). The Microlux IV is Seiler's most versatile compound microscope. Specifications Seiler Microlux IV LED Compound Microscope Specifications Infinite Plan Objectives: 4x, 10x, 20x, 40x, and 100x. Seidentopf Type Binocular Head: 30° Inclined, 360° Rotable. Eyepiece: WF10X / 20 mm. Condenser: Abbe Type N.A. = 1.25 with iris diaphragm. Nosepiece: Reversed quintuple click-stop revolving mechanism with multiple ball bearings. Interpupillary Adjustable Distance: 50 - 75 mm. Diopter Adjustable Range: ± 5°. LED illumination. Coaxial coarse and fine focusing control. Double layer mechanical stage with removable slide holder (190 mm x 140 mm). Travel stage area 78 mm x 55 mm with a right-hand stage handle. Anti-fungal systems. 110 - 240 V universal power supply. Literature Seiler Microlux IV LED Compound Microscope Literature Seiler Medical Products Catalog Seiler Microlux IV - LED Compound Microscope User's Manual