Compare Leica Summilux-M 21mm F1.4 ASPH

[[{"Ft":"Construction","Fn":"Colors","Fv":"Black"},{"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":"Optical Formula | Elements","Fv":"10 elements"},{"Ft":"Construction","Fn":"Optical Formula | Groups","Fv":"8 groups"},{"Ft":"Construction","Fn":"Optical Formula | Special Glass","Fv":"2 aspherical elements5 anomolous dispersion elements groups"},{"Ft":"Dimensions","Fn":"Size | Diameter","Fv":"70 mm / 2.76 in"},{"Ft":"Dimensions","Fn":"Size | Length","Fv":"66 mm / 2.60 in"},{"Ft":"Dimensions","Fn":"Weight","Fv":"580 g / 20.49 oz"},{"Ft":"Function","Fn":"Angle Of View","Fv":"91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical"},{"Ft":"Function","Fn":"Aperture","Fv":"f/1.4 ~ f/16"},{"Ft":"Function","Fn":"Autofocus","Fv":"No"},{"Ft":"Function","Fn":"Focal Length","Fv":"21 mm"},{"Ft":"Function","Fn":"Focus Type","Fv":"Extending front"},{"Ft":"Function","Fn":"Image Stabilization","Fv":"No"},{"Ft":"Function","Fn":"Weather Resistance","Fv":"No"},{"Ft":"Performance","Fn":"Max Magnification","Fv":"0.03x"},{"Ft":"Performance","Fn":"Min Focus Distance","Fv":"700 mm / 27.56 in"},{"Ft":"Production","Fn":"Accessory","Fv":"Lens hood included"},{"Ft":"Production","Fn":"Debut","Fv":"2008-09-15"},{"Ft":"Production","Fn":"Made In","Fv":"Germany"}]]