Summilux-M 35 mm f:1,4 ASPH

Características

Código - 11 874-negro - 11 883-plateado - 11 859-titan 11 663-lacado negro - 158
Producción - 1994-2010 - 18,404+ ejemplares
Montura -Bayoneta Leica M con Códigos 6 bits a partir de 2006

Angulo de visión diagonal, horizontal, vertical: - Para 35 mm: 63°, 54°, 38°

Diseño Óptico:

Número de lentes/grupos 9 / 5, una asférica, con una superficies asférica
Longtud focal efectiva - 35.6 mm
Posición de la pupila de entrada 6.8 mm (respecto a la primera superficie de lente en la dirección de la luz)

Intérvalo de enfoque: - 0.7 m a infinito
Escalas: combinada, metros/pies
Campo visual mínimo: 420 mm x 630 mm
Factor de reproducción: - 1:17.5

Diafragma - f/1.4-f/16 con click, valores intermedios, diafragma manual tipo iris de 9 hojas

Montura de flitros: roscado interno para filtros E-46, elemento frontal no rotatorio.
Parasol: Separado, encajado, con seguro, incluido en el paquete original.
Accesorios - Parasol: #12589 #12466
Visor: incluido en la cámara

Longitud hasta la bayoneta - 34.5 mm
Diámetro máximo - 53 mm
Peso - aprox. 250 g (anodizado) 415 g (Cromado o titanio)
Materiales - Aluminio anodizado y vidrio óptico / latón cromado o laminado en titanio y vidrio óptico.

Inscripción - LEICA SUMMILUX-M ASPH. 1:1.4/35 E 46 (Serial No.)
Diseño - Walter Watz - 1993

Referencias

• Erwin Puts
  
• Ken Rockwell
  
• Thorsten Overgaard
  
• Ashwin Rao para Steve Huff
  
• Pebble Place
  

Descripción

The technique of polishing (grinding) the aspherical shape of lens surfaces is quite expensive with the classical machinery that Leica could use in those days. The modern CNC machinery was not yet on the horizon and the only alternative was the technique of blank-pressing, developed by Zeiss. It is the merit of Lothar Kölsch who switched from Zeiss to Leica to have introduced the employment of blank-pressed lens elements. Not every glass type can be used for this process and the original design of the Summilux-M 1:1.4/35 mm aspherical had to be adapted. The new lens has one aspherical lens surface of the blank-pressed type and the designation was changed to ASPH. (with dot!).

Generally this lens has the same performance and a slightly different fingerprint as the ‘aspherical’-version. Mechanically the lens is superbly finished with perfect centring of all lens elements.

This Summilux version is more affordable second-hand than the one with two aspherical surfaces. For more than fifteen years it had set the standard for high-speed wide-angle lenses. The one aspect that had to be accepted was the lower performance in the close-focus range (corrected in the new version with floating elements), but more often than not this drop in contrast was not visible because of the type of pictures made with this lens: handheld and with moderately grainy emulsions one would be hard pressed to notice this effect. The lens is one of those typical Leica workhorse lenses that never fail to deliver and almost never disappoint.

Kai Wong para DigitalRev