Total magnification: 3.5X-90X; Head: 45 degrees inclined 360 degrees rotatable trinocular; Eyepieces: 30mm widefield WF10X/20 and WF20X; Objective: zoom 0.7X-4.5X; Zoom ratio: 6.5:1; Auxiliary objective lens: 0.5X; Separate photo-tube focus adjustment; Beam split lever enables photo-tube or left eye-tube; Interpupillary distance: adjustment 2-3/16inch ~ 2-15/16inch(55mm ~ 75mm); Diopter: adjustable on both ocular-tubes +/-5dp * Working distance: 6-1/4inch (160mm) with 0.5X auxiliary lens and 3-3/4inch (95mm) without 0.5X auxiliary lens; Field of view: max 2-3/8inch (60mm) with 0.5X auxiliary lens and max 1-1/8inch (29mm) without 0.5X auxiliary lens; Focus adjustment stroke: 2-3/8inch (60mm); Incident (upper) illuminator: 12V/10W halogen with reflector, 90 degrees adjustable inclined angle range * Transmitted (lower) illuminator: 12V/10W halogen; Each light has its own intensity control; Main power on/off switch; Mounting size of auxiliary lens and ring lights: 50mm female thread; Plastic shell 54 LED with 100v-240v wide voltage range power adapter; Glass stage plate: 3-3/4inch (95mm) in diameter; White/black plastic stage plate: 3-3/4inch (95mm) in diameter; Sturdy metal framework; Power supply: 100V~240V, 50/60Hz (US and Canada Plug) * Digital camera: - true color 640 x 480 pixels - 0.45X reduction lens to get larger field of view - Software compatible with Windows 2000/XP/Vista/Windows 7 32/64-bit, and Mac OS - Capturing microscope images, recording live video, measuring lengths, angles, areas, editing images * 5-year warranty against manufacturing defects