Pentax DA 40mm f/2.8 Ultra Compact Lens for Pentax and Samsung Digital SLR Cameras What's in The Box - smc DA 40mm F2.8 Limited lens (21550), Lens Hood MH-RC 49mm (38742), DA 40mm Lens Cap 49mm (31493), DA 40mm Lens Soft Case (33944) PENTAX KAF Mount Equivalent focal length to 60mm in the 35mm format with *ist D/DS The image circle is designed to match the CCD used in PENTAX digital SLRs Ultra-compact pancake-type design weighs just 3.2 ounces