Working Diagram Of Exposure Meter - Leica R6 Instructions Manual

Working diagram of exposure meter
This diagram uses the standard layout in
which camera and lens data are on the left,
film speed and exposure-meter range on the
right, and the exposure values (EV) lie
between them. Time exposures are indicated
diagrammatically by the arrow on the left.
Line A in this example shows that in poor
light (1 cd / m2), for a fast film with an ISO
rating of 400 /27o, the exposure value is 5.
For this, anf / 1.4 SUMMILUX R lens needs
an exposure of rls s at full' ailerture. When
you have adj usted the shutter / aperture
balance in the viewfinder, the shutter-
setting ring on the camera, the aperture
ring on the lens, and the exposure display in
the viewfinder show the same combination
of shutter and aperture data. Line B shows
that if you stop down to f / 2.8 in the same
conditions (EV5), the required exposure
isr/q s. These values are again displayed after
you have adjusted the shutter / aperture
balance.
If you set the lens to its smallest stop of
f /16, the exposure meter cannot give you
a direct reading and there is no shutter-
speed setting available. Further, you Oan no
longer achieve a balanced shutter / aperture
combination: in the viewfinder's shutter/
aperture balance only the triangular LED
on the left lights. In such a case, you can
readily compute the correct exposure as
follows:
In this example, the last reading for which
you can obtain a balanced shutter / aperture
combination is 1 s at f / 5.6.This corresponds
t o 2 s a t f / 8 , 4 s a t f l l l ,
a n d 8 s a t f / 1 6
(dotted line C). Set the shutter to B and take
an eight-second time exposure.