Leica R6.2 User Manual download pdf (Page 38)

Design of LEICA R-Lenses

The layout of the controls is standard for all

LEICA R-Lenses fitted with an automatic

diaphragm. This ensures that no matter what

focal length you use, the left hand can work

fast and reliably. These controls are the

aperture-setting ring

14 , the fixed depth of

field scale

, and the focusing ring

Automatic spring-back diaphragm

Most LEICA R-Lenses have an automatic

spring-back diaphragm, i.e. before and after

exposure the viewfinder image is always at

full aperture and thus at maximum view-

finder brightness. Just before the exposure

or when you press the depth of field lever,

the lens diaphragm closes to the preset

value.

Some LEICA R-Lenses do not have an

automatic diaphragm. These are the 28mm

PC-SUPER-ANGULON

-R f/2.8; 35 mm;

f/4 PA-CURTAGON

-R, the 400mm f/6.8

TELYT

-R, the 500mm f/8 MR-TELYT-R,

the 560mm f/6.8 TELYT

-R, and the

800mm f/6.3 MR-TELYT

-S. See page 18:

Using the exposure meter at working aper-

ture.

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Leica R6.2 User Manual Page 38