Bring your photography to new heights with the Ef 50mm f/1.2L Usm Lens, a premium piece of equipment designed for serious photographers. As the fastest autofocus lens in its class, it's an indispensable asset for professionals and advanced amateurs alike. This lens is compatible with Canon's full-frame sensor Digital SLRs, such as the Eos-1Ds Mark Ii and Eos 5D, enhancing their performance while also delivering stunning results on Aps-c/H sized sensor models.The Ef 50mm f/1.2L Usm Lens is a shining example of Canon's commitment to optical excellence. Every feature of this lens, from its wide 72mm filter diameter to its dust and moisture-sealed construction, speaks to its professional quality. A high refraction glass molded aspherical lens element minimizes spherical aberration, ensuring fine detail and maximum image quality from corner to corner, even when the lens is used wide open.