The Canon 35mm f/1.4 L USM 
lens is one of Canon’s top of the line lenses; hence the “L” status, price tag, and the red ring around the top end of the unit. The lens has a huge front element with a 77mm filter thread. Right below that is a large ring used for focusing. Users with larger hands and those that appreciate the feel of larger focusing rings will take quite a liking to this lens. Additionally, it may also be of very big use to cinematographers that put high value into their prime lenses. When your hand is cupping the lens for focusing, it can easily access the manual focus/autofocus switch right below the ring.
