It has a bit of heft, at 1.28 lbs (580g), and it has a large 72mm filter thread. More importantly, it utilizes a ring-type USM motor for focusing, making it both quiet and fast. The 50mm f/1.4 is much smaller and lighter, weighing in at almost exactly half the weight of the f/1.2 at .64lbs (290g). The body is sturdy plastic with a metal lens mount. wlAf.

canon ef 35mm f 1.4 l usm test