The Sigma 30mm f/1.4 lens is ideal for travel, wedding, event, and portrait photography. It has a compact size of 2.3" and weighing 14 oz. This is a high quality prime lens delivering exceptional optical performance. The angle of view of the Sigma 30mm f/1.4 closely replicates the human eye field of vision. The Sigma 30mm f/1.4 EX DC HSM is designed for cameras with APS-C sensors and designed with motor driven ultrasonic waves to deliver quiet, high-speed autofocus. The exterior is composed of a finish to spotlight the superior build and optical quality while enhancing its appearance.