The video describes the major components of a brightfield microscope. It is one of the types of electron microscopes. TIMELINE: 0:00 Introduction 0:11 What is brightfield microscopy? 0:18 Components of brightfield microscope 1:47 Field curvature 2:30 Chromatic aberrations 3:12 Advantages of brightfield microscopy 3:27 Disadvantages of brighfield microscopy