Pentax DA 35mm f/2.4 AL Lens for Pentax Digital SLR cameras Fast F2.4 maximum aperture for handheld photography in low lighting and depth of field flexibility. Highly lightweight design for improved comfort and portability. PENTAX Super Protect (SP) coating helps repel dust, water, and grease, making the lens easier to clean. An aspherical lens element helps to compensate for spherical aberration to maximize image quality. Equivalent to 53.5mm in the 35mm format.