Pentax K-Mount HD DA 35mm f/2.8 Macro 35-35mm Fixed Lens for Pentax KAF Cameras (Limited Black) Macro, offering 1:1 image magnification ratio. Ultra-sharp, macro for close up photography High-grade multi-layer HD (High Definition) Coating Equivalent to 53.5mm in 35mm film format. Quick Shift focus system Super Protect coating of the front lens element for effective protection against dirt and finger marks 9 blade diaphragm for stunning bokeh