Compare Voigtlander 21mm F1.8 Ultron

[[{"Ft":"Construction","Fn":"Aperture Blades","Fv":"10 blades"},{"Ft":"Construction","Fn":"Form Factor","Fv":"Ultra Wide-Angle Prime Lens"},{"Ft":"Construction","Fn":"Image Size","Fv":"Full-Frame"},{"Ft":"Construction","Fn":"Lens Barrel","Fv":"Physical aperture ring, Distance scale, DoF scale"},{"Ft":"Construction","Fn":"Lens Mount","Fv":"Leica M-mount"},{"Ft":"Construction","Fn":"Material","Fv":"Metal barrel, metal mount"},{"Ft":"Construction","Fn":"Optical Formula | Elements","Fv":"13 elements"},{"Ft":"Construction","Fn":"Optical Formula | Groups","Fv":"11 groups"},{"Ft":"Construction","Fn":"Optical Formula | Special Glass","Fv":"Aspherical element groups"},{"Ft":"Dimensions","Fn":"Filter Diameter","Fv":"58 mm / 2.28 in"},{"Ft":"Dimensions","Fn":"Size | Diameter","Fv":"62 mm / 2.44 in"},{"Ft":"Dimensions","Fn":"Size | Length","Fv":"92 mm / 3.62 in"},{"Ft":"Dimensions","Fn":"Weight","Fv":"412 g / 14.56 oz"},{"Ft":"Function","Fn":"Angle Of View","Fv":"91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical"},{"Ft":"Function","Fn":"Aperture","Fv":"f/1.8 ~ f/22"},{"Ft":"Function","Fn":"Autofocus","Fv":"No"},{"Ft":"Function","Fn":"Focal Length","Fv":"21 mm"},{"Ft":"Performance","Fn":"Min Focus Distance","Fv":"500 mm / 19.69 in"},{"Ft":"Production","Fn":"Accessory","Fv":"Lens Hood: Non-detachable hood (supplied)"},{"Ft":"Production","Fn":"Debut","Fv":"2012-09-17"},{"Ft":"Production","Fn":"Made In","Fv":"Japan"}]]