The Yongnuo YN EF is an auto-focus lens for the Canon EF mount, with an aperture range of f/1.8 to f/22. Featuring multi-coated lens elements, they provide a sharp focal length of 50 mm. This full frame lens supports various shooting modes for the desired proportion of clarity. Designed to ensure effective low-light capture, the focal length prime lens provide users with an immersive, more detailed shooting experience. Enclosed in a compact body of 73 mm x 55 mm, these lens weighs 4.23 oz.