The Sigma DG HSM 35mm F1.4 Lens For Pentax is a lightweight, durable and portable lens which is designed lens is suitable to use for sports, landscapes, portraits, arts, group shots and general use. This lens incorporates a brass made bayonet mount which has both high accuracy and durability. For wide angle photography, the 35mm lens and its circular 9-bladed f/1.4 aperture ensure excellent brightness and blurred background bokeh effects.