Compare Pentax HD Pentax DA 21mm F3.2 AL Limited

[[{"Ft":"Construction","Fn":"Aperture Blades","Fv":"7 blades, Rounded aperture diaphragm"},{"Ft":"Construction","Fn":"Colors","Fv":"Black, Silver"},{"Ft":"Construction","Fn":"Form Factor","Fv":"Wide-Angle Prime Lens"},{"Ft":"Construction","Fn":"Image Size","Fv":"APS-C"},{"Ft":"Construction","Fn":"Lens Barrel","Fv":"Distance scale, DoF scale"},{"Ft":"Construction","Fn":"Lens Mount","Fv":"Pentax K-mount"},{"Ft":"Construction","Fn":"Motor","Fv":"Screw drive from camera"},{"Ft":"Construction","Fn":"Optical Formula | Elements","Fv":"8 elements"},{"Ft":"Construction","Fn":"Optical Formula | Groups","Fv":"5 groups"},{"Ft":"Construction","Fn":"Optical Formula | Special Glass","Fv":"High-grade multi-layer HD (High Definition) Coating groups"},{"Ft":"Dimensions","Fn":"Filter Diameter","Fv":"49 mm / 1.93 in"},{"Ft":"Dimensions","Fn":"Size | Diameter","Fv":"63 mm / 2.48 in"},{"Ft":"Dimensions","Fn":"Size | Length","Fv":"25 mm / 0.98 in"},{"Ft":"Dimensions","Fn":"Weight","Fv":"134 g / 4.73 oz"},{"Ft":"Function","Fn":"Angle Of View","Fv":"69.0° Diagonal | 59.5° Horizontal | 41.7° Vertical"},{"Ft":"Function","Fn":"Aperture","Fv":"f/3.2 ~ f/22"},{"Ft":"Function","Fn":"Autofocus","Fv":"Yes"},{"Ft":"Function","Fn":"Crop Factor","Fv":"1.5"},{"Ft":"Function","Fn":"Focal Length","Fv":"21 mm"},{"Ft":"Function","Fn":"Focal Length (35mm Equivalent)","Fv":"31.5 mm"},{"Ft":"Function","Fn":"Image Stabilization","Fv":"No"},{"Ft":"Performance","Fn":"Max Magnification","Fv":"0.17x"},{"Ft":"Performance","Fn":"Min Focus Distance","Fv":"200 mm / 7.87 in"},{"Ft":"Production","Fn":"Accessory","Fv":"Lens Hood: MH-RBB43 (supplied)"},{"Ft":"Production","Fn":"Debut","Fv":"2013-08-27"}]]