True trinocular microscope. Provides crisp clear 3D images, long working distance and a wide field of view. 21x to 135x continuous optical zoom with 15x eyepieces. Includes Aven's Mighty Cam Pro USB+HDMI autofocus camera. View live images on an HD monitor or on a computer via the included Mosaic software. The camera also features an SD card slot for capturing images without a PC, as well as on-screen measurement tools for use in HDMI mode.