Compound Microscopes are constructed with two optical paths at the same angle. The compound microscope has two systems of lenses for greater magnification.Stereo Microscope are designed with two separate optical paths with two objectives and two eyepieces to provide slightly different viewing angles to the left and right eyes. In this way it produces a 3-D visualization of the sample being examined. The zoom provides different magnification and features an inversion system which allows the image to be viewed normally and right side up. Digital Microscopes BARSKA's digital microscopes are state-of-theart integration of high quality microscope and a digital camera. Simply connect the microscope to the computer with the USB cord to magnify the object and view them on your PC screen and with option to save. Digital microscopes are great for educational purposes because several people can view the specimen at once.