OMAX 40X-1600X Lab Trinocular Darkfield Biological Compound Microscope Dry Darkfield Condenser Head: 45 degrees inclined 360 degrees swiveling trinocular; Nosepiece: revolving quadruple; Eyepieces: wide field WF10X and P16X Objective: achromatic DIN 4x, 10x, 40x(S), 100x(S, Oil); Total magnification: 40x-64x-100x-160x-400x-640x-1000x-1600x; Transmitted (lower) illuminator: 6V/20W Halogen Stage: mechanical double layer size: 5-1/2inch x 5-1/2inch (140mm x 140mm); Stage x-y stroke (travel range): 3inch x 2inch (75mm x 50mm); Photo tube adjustment range: 3/4inch (18mm); Focus adjustment: Coaxial coarse and fine knobs on both sides Focusing knob can be locked for observation and transportation; Condenser and diaphragm: NA1.25 Abbe condenser with iris diaphragm; Extra NA: 0.7-0.9 dry darkfield condenser; Power supply: 100V~240V 50/60Hz (US and Canada power plug) 5-year warranty against manufacturing defects