Anthony Lane in The New Yorker:
There have been Leica cameras since 1925, when the Leica I was introduced at a trade fair in Leipzig. From then on, as the camera has evolved over eight decades, generations of users have turned to it in their hour of need, or their millisecond of inspiration. Aleksandr Rodchenko, André Kertész, Walker Evans, Henri Cartier-Bresson, Robert Capa, Robert Frank, William Klein, Garry Winogrand, Lee Friedlander, and Sebastião Salgado: these are some of the major-league names that are associated with the Leica brand—or, in the case of Cartier-Bresson, stuck to it with everlasting glue.
Even if you don’t follow photography, your mind’s eye will still be full of Leica photographs. The famous head shot of Che Guevara, reproduced on millions of rebellious T-shirts and student walls: that was taken on a Leica with a portrait lens—a short telephoto of 90 mm.—by Alberto Díaz Gutiérrez, better known as Korda, in 1960. How about the pearl-gray smile-cum-kiss reflected in the wing mirror of a car, taken by Elliott Erwitt in 1955? Leica again, as is the even more celebrated smooch caught in Times Square on V-J Day, 1945—a sailor craned over a nurse, bending her backward, her hand raised against his chest in polite half-protestation.
More here.