Light microscopy versus electron microscopy. Lenses allow reconstruction of the image in both techniques, but to focus electron beams electromagnetic lenses are required. Standard light microscope (LM, left), transmission electron microscope (TEM, center), and scanning electron microscope (SEM, right). Source: http://www.vcbio.science.ru.nl/images/fesem_beam_zoom.jpg. Original illustration: Jeol Instruments. Redrawn by vcbio.science.ru.nl, Radboud University Nijmegen. Used with permission.