Tri-Elmar-M 16-18-21 mm f:4,0 ASPH

Características

Código - 11 606 - 11 642 (conocida como "WATE")
Producción - 2006- Números de serie: #3995104-#4041202
Variantes -
Montura - Bayoneta Leica M Códigos 6 bits
Angulo de visión diagonal, horizontal, vertical: (35mm, M9) - 16 mm: 107°, 97°, 74° / 18 mm: 100°, 90°, 67° / 21 mm: 92°, 81°, 60°; (M8) - 16 mm: 90°, 80°, 59° / 18 mm: 84°, 74°, 53° / 21 mm: 75°, 65°, 46°
Diseño Óptico:
Número de lentes/grupos - 10/7
Longitud focal efectiva -
Posición de la pupila de entrada - 408 mm
Intérvalo de enfoque: - 0.5 m a infinito
Escalas: combinada, metros/pies, con lineas grises tenues por debajo de 0,7 m.
Campo visual mínimo: (35mm/M9) - 16 mm: 915 x 1373 mm, 18 mm: 833 x 1250 mm, 21 mm: 725 x 1087 mm; (M8 18x27) - 16 mm: 688 x 1032 mm, 18 mm: 626 x 939 mm, 21 mm: 545 x 817 mm
Factor de reproducción: 16 mm 1:38, 18 mm 1:35, 21 mm 1:30

Diafragma - f/4-f/22 con click, valores intermedios, diafragma manual tipo iris de 10 hojas
Montura de filtros: Rosca Macho
Parasol: roscado 12458
Acesorios: adaptador para filtros E46 visor: Universal Wideangle Finder M 12011
Longitud hasta la bayoneta - 62mm /72mm con parasol
Diámetro máximo - 54 mm; 58 mm con parasol
Material: aluminio anodizado negro
Peso - aprox. 335 g

Inscripción - LEICA TRI-ELMAR-M 1:4/ 16-18-21 ASPH 3XXXXXX

Diseño:

Referencias



This Tri-Elmar-M is the second construction that uses a zoom-lens design with three mechanical slots for fixed focal lengths, the first one being the Tri-Elmar-M 28-35-50 ASPH. It is extremely compact and operates with silk-smooth precision. Optically it is quite impressive, especially when one considers the small size. The lens has a linear movement which simplifies the design somewhat, but the addition of internal focusing adds mechanical complexity to the already complex optical design.

The compactness of the lens has been made possible by a novel method of attaching a separate filter holder and the lens hood. It is a patented thread that stops the hood and filter holder at a specified position; independent of the point where you begin the movement. It has the same secure lock and precise position as a bayonet. The lens is remarkably flare resistant, even shooting straight against the sun does not generate any ghosting effects.

This lens is suited for the inspired snapshot-shooter who wants fresh and novel impressions when taking emotionally inspired pictures. The lens was introduced during the production of the M8 to provide users of this camera with the classical viewing angles of 21-24-28 mm focal length.

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