Características

Código - 11 215-Leicaflex - 11 216-R.only - 11 345-ROM - 11 217-R.only.Safari LLC - 123
Producción - 1976-2009, 99,736+ Objetivos

Variantes: Negro, Verde Safari, R-only y 3-cam
Montura - LEICA R
Ángulo de visión (diagonal, horizontal, vertical): 47°, 40°, 27°

Diseño Óptico:

Número de lentes/grupos 6/4
Longitud focal efectiva - 52,5 mm
Posición de la pupila de entrada

Intervalo de enfoque: - 50 cm a infinito

Escalas: en metros y pies
Campo visual mínimo: 180 mm x 270 mm
Factor de reproducción: 1:7.5
Diafragma - f/2-f/16 automático con 6 hojas, con valores intermedios
Montura de filtros: E 55
Parasol: Interno telescópico
Accesorios: accesorio para acercamiento: ELPRO

Longitud hasta la bayoneta - 41 mm
Diámetro máximo - 61 mm
Material: Aluminio anodizado y pintado
Peso - aprox. 290 g
Inscripción LEICA SUMMICRON-R 1:2/50 E 55 3XXXXXX
LEITZ SUMMICRON-R 1:2/50 3XXXXXX
SUMMICRON-R 1:2/50 LEITZ CANADA 3XXXXXX

Diseño: Walter Mandler, Garry Edwards and Erich Wagner - June 1976

Referencias

Marco Cavina

Many modern lenses, even before 1950, are based on the six-element double-Gauss design. This lens-type is the best-studied type in the world. It has excellent potential for high quality imagery, but has its limits due to a fair amount of oblique spherical aberration (a fifth-order aberration). This error is very difficult to balance with third order aberrations, let alone to correct completely. The wider the aperture, the more disturbing this error becomes. Around 1980, this design type reached its current zenith: one may assume that significant improvements are unlikely unless the designer departs from the basic layout. For almost 35 years the Summicron-R 50mm delivered more performance than most users and films could handle. The Summicron-R shares its design characteristics with the identical version for the M-series. One should see everything in perspective. An in-depth comparison between the Leica Summicron and the Canon 1.8/50mm for EOS cameras revealed small differences to Leica’s advantage, but performance differences are generally quite small, and probably only significant for true Leica aficionados. The Summicron-R has been sold in large numbers: the total for both versions amounts to more than 190.000 over a period of forty years.