Just imagine capturing stunning, professional-grade photographs with the Ef 50mm f/1.2L Usm Lens, a remarkable piece of equipment that stands as a testament to Canon's commitment to optical excellence. This lens, the fastest autofocus lens in its class, is an indispensable asset for professional photographers and advanced amateurs alike.Designed to complement full-frame cameras like the Canon Eos-1Ds Mark Ii and Eos 5D digital SLRs, this lens also delivers exceptional results on Aps-c/H sized sensor models. The Ef 50mm f/1.2L Usm lens is equipped with a wide 72mm filter diameter and a construction that is sealed against dust and moisture, ensuring its durability and reliability in various shooting conditions.The high refraction glass molded aspherical lens element is key in minimizing spherical aberration, providing fine detail and maximum image quality from corner to corner, even when the lens is used wide open.