3.5X-225X Simul-Focal 144-LED Articulating Zoom Stereo Microscope + 5MP Camera 3.5X-225X Simul-focal zoom magnification with crisp stereo images Simul-focal optical system enables clear images on your computer/video screen while simultaneously obtaining well-focused images through the eyepieces 2-1/2" (65mm) super widefield of view; 8" (200mm) large working distance Flexible articulating pillar arm; Powerful 144-LED ring light with built-in dimmer 5MP digital camera with advanced editing &amp; measuring software for Windows XP/Vista/7/8/10