OMAX 40X-2500X Phase Contrast LED Trinocular Compound Microscope Total magnification for brightfield: 40X-100X-250X-400X-1000X-2500X; Total magnification for phase contrast: 100X-250X-400X-1000X-2500X; Eyepieces: widefield WF10X/18 and WF25X; Brightfield objectives: achromatic DIN 4X, 10X, 40X (S), 100X (S, Oil); Phase contrast objectives (in phase contrast kit): achromatic PH10X, PH40X (S), PH100X (S, Oil); Viewing head: 45 degrees inclined 360 degrees swiveling trinocular Interpupillary distance: sliding adjustable 2-3/16inch ~ 2-15/16inch (55mm ~ 75mm); Diopter: adjustable on both eyepiece tubes; Nosepiece: revolving quadruple; Stage: mechanical stain-resistant double layer, size: 5-1/2inch x 5-1/2inch (140mm x 140mm), translation range: 3inch x 2inch (75mm x 50mm); Photo tube adjustment range: 5/8inch (15mm); Focus: coaxial coarse and fine focus knobs on both sides, rack and pinion adjustment, with tension control Focusing knob can be locked for observation and transportation; Condenser and diaphragm: Abbe NA1.25 rack and pinion adjustment condenser with iris aperture diaphragm; Phase contrast kit: - NA1.25 condenser - Three separated condenser annular plates: 10X, 40X, 100X - Three phase contrast objectives: 10X, 40X, 100X - Each phase contrast condenser can be centered individually 37mm mounting size in diameter - Centering telescope: 23.2mm; Black palm rest on the base; Illumination: transmitted (lower), replaceable 3W LED light, variable intensity; Metal mechanical components; Power supply: 100V~240V 50/60Hz worldwide range (US and Canada power plug) 5-year warranty against manufacturing defects