Características

Código -11 273 / LLC - 189
Producción - 1997-2004 < 3,350 objetivos
Variantes: 3-cam o R
Montura - LEICA R
Ángulo de visión (diagonal, horizontal, vertical): 14°

Diseño Óptico:

Número de lentes/grupos7 / 5
Longitud focal efectiva -
Posición de la pupila de entrada

Intervalo de enfoque: - 1,5 m a infinito
Escalas: en metros y pies
Campo visual mínimo:
Factor de reproducción:

Diafragma - f/2.8-f/22 automático con preselección y valores intermedios

Montura de filtros: Series VIII
Parasol: : incluído, telescópico
Accesorios: Leica APO-EXTENDER-R 2x
Longitud hasta la bayoneta
Diámetro máximo -
Material: Aluminio anodizado.
Peso - aprox. 970 g
Inscripción APO-ELMARIT-R 1:2.8/180 LEITZ CANADA 3XXXXXX
Diseño:

Referencias

In the last decades of the 20th century the power of automatic lens design programs increased almost exponentially. The lens lines of the major camera manufacturers was growing and these two trends produced an era of excellent lens designs of ever expanding specifications. On the other hand careful observers of the photographic world noted a lens plateau, that is lenses hardly improved in performance and image quality converged to a common norm. Occasionally however, a design stands out of the crowd. This Apo-Elmarit-R 2.8/180mm is such a design and offers a most interesting behavior. At full aperture it is already at its zenith, with a superb performance, that is constant over the aperture range and full negative area.

Part of the magic is the employment of internal focusing, that improves imagery significantly and also gives very smooth focusing. This lens is hand-hold-able, but best performance will be extracted when the lens is supported. Both the Apo-Summicron 2/180 and this 2.8/180 mm focus past the infinity indication. The additional distance is more than 5 millimeters. The amount of glass and metal in these lenses is such that thermal expansion becomes an issue. The free space beyond the infinity mark has thoughtfully been provided so that whatever the temperature, the true infinity focus can be used. Quality at closer distances is excellent. Only one lens element inside the lens moves when you focus and the designer has very skillfully used this shift to adjust the close up performance. Not a real floating element, but sort-of, so to speak.

In 2003 a slightly redesigned version (physically) appeared on the market to allow the use of the 1.4x extender.