Summicron 9 cm f:2,0

Características

Código - SOOZI (Rosca M39, parasol separado), SEOOF (rosca M39, parasol incluido 11123), SOOZI-M (11127), SEOOF-M or SEOOM/11123 (bayoneta), ZOOEP/11133: grupo óptico suelto
Producción - 1957 - 1959 1000 ejemplares
Variantes - Cromado
Montura - Bayoneta Leica M, Rosca M39; la celda óptica se desenrosca para usar con Visoflex, vendida separadamente 11 133-cromado - 11 124-negro, 3500 ejemplares producidos en 1960

Angulo de visión (diagonal, horizontal, vertical) : 35mm (24 x 36 mm) - 27°, 23°, 15°

Diseño Óptico:

Número de lentes/grupos 6 /5
Longitud focal efectiva -
Posición de la pupila de entrada

Intervalo de enfoque: - 1 m a infinito
Escalas: en metros o pies
Campo visual mínimo:220 mm x 330 mm
Factor de reproducción: 1:9

Diafragma - f/2,0-f/16 o f/22

Montura de filtros: E48
Parasol:

Longitud hasta la bayoneta -
Diámetro máximo -
Material: Latón cromado
Peso - aprox. 685 g

Inscripción - 9 cm SUMMICRON 1:2/90
Diseño:

Referencias

Descripción

The first version was in chrome, with a large detachable lens hood also in chrome. It had a finely knurled focusing ring. First units were made in Wetzlar, but most were manufactured in Midland, Canada, in L39 mount and bayonet. The Wetzlar based, L39 mount version is very rare. Even more rare is a black paint L39 mount lens, which exists in two versions. There are lenses with finely knurled rings and scalloped rings. There are versions with one and with two aperture series engraved on the ring. And versions with clock wise and anti-clockwise movement

QUOTE]The first 90mm lens with an aperture of 1:2 has been designed and produced around 1953. It was a six-element design that differed from the second version with the detachable (and large) lens hood. Most seem to have produced from 1957 to 1959. This design was created in Wetzlar and production occurred both in Canada and Germany. That series from 1953 belongs to the mysteries of the Leitz Company. In the serial-number documentation, these lenses are clearly defined and allocated. What happened to these lenses (200 were allocated) is not fully known.

The many changes that have been found in the earliest series might be an indication that Leitz did have trouble finding the right mount and associated handling characteristics. The Summicron design is a straight-forward version of the double-gauss design, a configuration that is the backbone of much of the modern lenses on the market, not only at Leitz.

The designers allowed the lens to grow to whatever physical dimension was necessary and this lens performed admirably well when stopped down. When one reflects on the fact that the lens was designed in the early 1950s by a design department within Leitz that was not dedicated to photographic lenses the performance is admirable. This fact also explains the user-unfriendly size and weight of the lens.

At maximum aperture the lens delivers a low-contrast image with moderate definition of fine detail. Because of the propensity to flare and veiling glare many pictures are a bit dull. This characteristic of the Summicron would support the romantic portraiture of women, and the lower contrast would help taking reportage style pictures in high contrast lightning situations. Leitz described the lens as being suited for color photography and noted that it was a lens for connoisseurs and experts alike. It was indeed the dream lens for most Leica users and owning one gave prestige and admiration.

The Summicron may be a heavy lens, but one that operates smoothly and radiates the craftsmanship of Leitz in manufacturing precision tools for the photographic world. This first version sold in limited quantities and possibly only a mere 1000 units have been effectively manufactured.