smc PENTAX DA 35mm f/2.8 Macro Limited. Compact lens with one-to-one magnification in a normal focal length. High-grade aluminum construction of the lens barrel, hood, and cap. Quick-shift Focus System for instant switching from auto focus to manual focus. PENTAX SP coating protects the exposed lens elements. Developed specifically for PENTAX digital SLRs. Focal length equivalent to 52.5mm in the 35mm format.