The Seiler Microlux IV Compound Microscope 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 with optional video or digital configurations. Specifications Seiler Microlux IV Compound Microscope Specifications Infinite Plan Objectives: 4x, 10x, 20x, 40x, and 100x. Seidentopf Type Binocular Head: 30° Inclined, 360° Rotable. Kohler Illumination System: Halogen 12 V / 20 W (optional: LED). 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°. 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. Configurations Seiler Microlux IV Compound Microscope Configurations #MLX817: Standard. #MLX817-DV: With Dual View. #MLX817-DV-LED: With Dual View LED. #MLX817-PH: With Phase Contrast Objectives. #MLX819: With Video. Literature Seiler Microlux IV Compound Microscope Literature Seiler Medical Products Catalog Seiler Microlux IV Compound Microscope Spec Sheet Seiler Microlux IV Compound Microscope User's Manual Seiler Microlux IV - LED Compound Microscope User's Manual