LEICA MP 0.72 Rangefinder Camera (Silver) - Handbuch (Seite 90)

85
Metering diagram (Diagram see p. 87)
Information on the metering range of the expo-
sure meter can be found on the right-hand side
of the diagram, while information on the working
range of the slotted shutter and the lenses are
on the left. Between them, the exposure values
(EV) can be read off.
The metering range of the exposure meter is
given on the right of the diagram in cd/m
2 (can-
dela per square meter). Above this, the film
speed settings (SV = Speed Value) are given in
ISO values. To the left of the diagram, you can
see the shutter speed details in seconds
(TV = Time Value). The working range of the
LEICA MP’s focal plane shutter is represented by
a shaded area in the adjacent column. In the
B/OFF setting, the range is open at the top. The
aperture values (AV) can be read off in the bot-
tom left. Example A highlights the relationships
between the film speed, light intensity (bright-
ness), shutter speed and aperture.
From the film speed (ISO 100/21°), you can first
of all follow the vertical line to its intersection
with the horizontal line for the given light intensi-
ty. In this example, this is 4000 cd/m
2 , which
corresponds to the brightness in bright sunshine.
The line then runs diagonally as far as the verti-
cal line for the set aperture (11) and from there
horizontally to the left until it reaches the neces-
sary shutter speed (1/250 s). The exposure value
(EV 15) can also be read off in the diagonal
course of the line.
Example B shows that in candlelight and with a
film speed of ISO 400/27° (1 cd/m
2 ) it is neces-
sary to use aperture 1.4 and a shutter speed of
1/15 s. The aperture 11 on the lens, for example,
cannot be used as the associated shutter speed
of 4 s is not available on the shutter speed
setting dial.