Canon EF is one of the fastest lenses in its class and super quiet, with its ring type ultrasonic motor. This Canon camera lens has one aspherical lens with two high refraction elements, which makes for sharper images. This medium telephoto lens features a floating system that will correct coma for high-quality images. The high-speed AF and 8 bladed circular apertures creates shallow depth of field, and a f/1.2 aperture that brings attention to the subject and blurs the background. The Canon EF is lightweight weighing 2.3 lbs and measures 5 x 5 x 3-inches. This Canon camera lens has a medium telephoto focal distance and super optical performance, which make it ideal for weddings and portraits. This medium telephoto lens does have auto focus, which is 1.8 times faster than the original. Canon EF opens up many possibilities for the beginner photographer. This Canon camera lens has a 72-mm filter size and has 8 elements in 7 groups.