HD Pentax-FA 77mm f/1.8 Limited Lens, Black

ColorBlack Focal Length77mmEquivalent to 118mm in 35mm format(when attached to PENTAX APS-C size DSLR cameras) Maximum ApertureF1.8 Minimum ApertureF22 Lens Construction7 elements in 6 groups Angle of View (Diagonal)31.5 Degree 21 Degree (when attached to PENTAX APS-C size DSLR cameras) MountKAF Minimum Focusing Distance2.3' (0.7m) Maximum Magnification0.14x Filter Diameter49mm Diaphragm ControlFully automatic Number of Diaphragm Blades9Rounded diaphragm (77mm: F1.8-F4) Aperture RingEquipped Lens HoodBuilt-in Lens CapO-LW54A (included)Lens CaseP60-120 (included) Temperature14 Degree F-104 Degree F (-10 Degree C-40 Degree C) Humidity85% or less (no condensation) OthersHD CoatingSP (Super Protect) Coating Dimensions (L x W x H)3.94 x 3.70 x 3.70" (10 x 9.39 x 3.39cm)Maximum:Diameter: 2.5" (64mm)Length: 1.9" (48mm) WeightApprox. 9.5 oz (270g)