Lenses with a Micro Four Thirds mount are suitable for mirrorless cameras from Olympus and Panasonic. These cameras have a Micro Four Thirds sensor. If you want to get closer to subjects, use a lens with a large zoom range. A lens with a fixed focal length is suitable for portrait photography. If you take photos in dark situations, you need a lens with a large maximum aperture. If you have a Panasonic or Olympus camera, you use lenses from both brands. That way, you can choose from an extensive range. These brands use the same mount, so you choose the right lens that suits you.