The YN 50mm II features multi-coated elements for improved image accuracy and a chrome-plated metal mount that is resistant to corrosion. Autofocus is designed to be fast and accurate, with an AF/MF switch on the barrel that allows you to quickly switch to manual focusing if needed. In the front, a 58mm thread accepts optional filters that can change the quality of your image for more creative options. Finally, the lens' firmware can be upgraded through the camera with compatible bodies, allowing for computer-free updates.
Specifications of Yongnuo YN 50mm f/1.8 Lens for Canon EF