Elmar 90 mm f:4,0 (III)

Características

Código -ELANG 11 730 (S), ELANG-M 11 830 (M) LLC - 168
Producción - 1964-1968 < 9,400 objetivos con < 500 rosca
Variantes -
Montura Bayoneta Leica M, Rosca M39

Ángulo de visión (diagonal, horizontal, vertical) : 35mm (24 x 36 mm) - 27°, 23°, 15°
Diseño Óptico:
Número de lentes/grupos 3/3
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/4,0-f/22 con click, diafragma manual tipo iris de 12 hojas

Montura de filtros:
Parasol: IUFOO 12575

Longitud hasta la bayoneta -
Diámetro máximo -
Material: Aluminio anodizado natural
Peso - aprox. 300 g
Inscripción -Leitz Wetzlar 169XXXX Elmar f=9cm 1:4 (algunos con Ernst Leitz GmbH Wetzlar)

Diseño:
Etiquetas: tag edit -

Referencias

Unico triplete de Cooke para cámaras Leica.

This lens is a Midland design and with only three single elements a case study in optical simplicity. Its full aperture performance is better than that of the predecessor with the classical 4-element/3-group construction. Overall contrast is medium to high with very good definition of fine detail over most of the film frame/capture area.

This lens has been introduced at the same time as the Tele-Elmarit 1:2.8/90mm which replaced the Elmarit 1:2.8/90mm.

Because of the fact that the Tele-Elmarit could not be used with the bellows attachment and had not the best performance at closer distances, Leitz offered the Elmar as a lens for these applications. It does show the intriguing strategy of fine-tuning the lens performance for a specified set of tasks. It was not possible in those days to create one general-purpose lens and so Leitz optimized the designs in different directions. A luxury that could not be extended indefinitely as it was a costly strategy.

With modern glasses, this lens would deliver a very interesting performance. Total production is rather high with about 6000 units, but precise numbers are difficult to give because the production of the Elmar 4/90 (3/3) and the Elmar 4/90 (4/3) were mixed in the same batch




Cooke -

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