The Micro Four Thirds Mount 25mm /1.8 from 7Artisans has 7 elements in 5 groups optical design. This lens has fast and bright maximum aperture of F1.8 for low-light photography. It is a lightweight and compact multi-purpose lens. Mounted on the APS-C sensor size cameras, it equals to a 37.5mm focal length, which is widely used in photography of landscape, portrait, macro, food and cinema. The lens has a premium fit and finish, and fits an Olympus or Panasonic Micro 4/3 Mount camera body.