OMAX 3.5X-90X Digital Zoom Trinocular Stereo Microscope with Dual Illmination System and Additional 54 LED Ring Light and 9.0MP USB Digital Camera V434B-L54P-C20C; 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, 90degrees;adjustable inclined angle range; Transmitted (lower) illuminator: 12V/10W halogen ach 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 3488 x 2616 pixels (9.0MP) - 0.45X reduction lens to get larger field of view - Software compatible with Windows XP/Vista/7/8/10 - Capturing microscope images, recording live video, measuring lengths, angles, areas, editing images - USB cable included 5-year warranty against manufacturing defects