Características

Código - 11 889 / LLC - 184
Producción - 1998- >4,500+ ejemplares
Variantes - Negro
Montura -Bayoneta Leica M (Con Códigos 6 bits a partir de 2012)
Angulo de visión (diagonal, horizontal, vertical) : 35mm (24 x 36 mm) - 18°, 15°, 10.2°

Diseño Óptico:

Número de lentes/grupos 5/4 - Superficies Asféricas:
Longitud focal efectiva - 136 mm
Posición de la pupila de entrada 68 mm

Intervalo de enfoque: - 1.5 m a infinito Extensión: 1:33
Escalas: en metros o pies
Campo visual mínimo:220 mm x 330 mm
Factor de reproducción: 1:9
Diafragma - f/3,4-f/22 con click, valores intermedios, diafragma manual tipo iris de ..
Montura de filtros: rosca hembra interna E49
Parasol: metálico, telescópico
Accesorios: Leica M Viewfinder Magnifiers 1.25x & 1.4x

Longitud hasta la bayoneta - 104.7 mm (con o sin parasol)
Diámetro máximo - 58,5 mm
Material: Aluminio anodizado
Peso - aprox. 450 g

Inscripción - APO-TELYT-M 1:3.4/135

Referencias

• Erwin Puts
  
• Apo-Telyt.com (2)
  

The Apo-Telyt-M is a very fine example of a design that combines the special demands of the M series (light weight and small volume) with that other characteristic of the M lenses: impeccable optical performance. With only five lens elements (to reduce weight) the designer has computed a masterpiece, supported by the engineers of the production department.

The distinctive characteristic of the Apo-Telyt is a high contrast, flare-free image with superior definition of extremely fine detail. This level of optical performance is very sensitive to manufacturing tolerances. Computer diagrams show the loss of performance when focus is shifted away from its optimum position. The lavish and some would say excessive attention to narrow production tolerances is indeed needed here.

The focal length of 135 mm is the maximum that the current rangefinder can handle and the use of the 1.25x or 1.4 magnifier is strongly recommended. The lens performs superbly at all apertures when the recording medium is a film emulsion. The silver-halide layer has a thickness of some 15 − 20 micron and this depth allows for some tolerance in focusing and mechanical accuracy.

When the lens is used on Leica cameras with solid state sensors, there is no thickness tolerance, only the normal depth of field of the lens. When the lens is attached to the M8 or M9 the user might in some situations notice that the optimum performance cannot be reached. Leica therefore advices to use the Apo-Telyt-M with an aperture of 1:5.6 to increase the depth of field.

The Apo-Telyt-M is truly a superb lens and one of the best lenses in the current line for the rangefinder camera.

This lens can save the focal length of 135 mm for the Leica rangefinder camera from oblivion. Artistically the focal length is very well suited for penetrating portraits and subtle documentary photography. One should however respect the privacy of individuals that happen to be in the recorded scene. Henri Cartier-Bresson had it much easier in this respect.