Características

Código - 11 240 < 2947024 > 11 242 /LLC - 188
Producción - 1975-1998 < 17,051 objetivos
Variantes: 3-cam, R
Montura - LEICA R
Ángulo de visión (diagonal, horizontal, vertical): 14°

Diseño Óptico:

Número de lentes/grupos 7/4
Longitud focal efectiva -
Posición de la pupila de entrada

Intervalo de enfoque: - 2.5 m a infinito
Escalas: en metros y pies
Campo visual mínimo: 276 mm x 414 mm
Factor de reproducción:

Diafragma - f/3.4-f/22 automático con preselección y valores intermedios

Montura de filtros: Series 7, más tarde E60
Parasol: : incluído telescópico
Accesorios: anillo soporte de filtros 14222
Longitud hasta la bayoneta 135 mm
Diámetro máximo - 68 mm
Material: Aluminio anodizado.
Peso - aprox. 750 g
Inscripción LEITZ CANADA APO-TELYT-R 1:3.4/180 XXXXXXX
Diseño: Walter Mandler

Referencias

Marco Cavina

This lens has gained and even today has a mythical status and not undeserved. It started life as a special purpose lens for reconnaissance purposes, but it soon was incorporated into the normal R-system with 6000 units planned for production.Actual production however has been increased to a total of 17.000. It is a true apochromatic design, implying higher color correction, already at full aperture and covering the full negative area.

Synthetically grown fluorite crystals had been used for apochromatic correction several times; the sensitive surface of this material was a hindrance for its general use. Leitz preferred the use of glass with specific properties. The lens delivers a high contrast image at all apertures with brittle sharpness, and this is even true when the background is of much higher luminance as in contra-jour picture taking and in high-contrast scenes. This lens, especially around 1:5.6 defined the state of the art of 180mm lenses in the nineteen-eighties. The next ‘apo’-designated lens in the 180mm class is the Apo-Summicron-R 1:2/180mm, which at 1:2 has improved image quality, that surpasses the performance that the Apo-Telyt 3/4/180mm. This is a stunning leap forwards and indicates the progress made by the Leica designers in the last 20 years.