LEICA SL 2 - Manual (Page 12)

Exposure meter
The exposure meter of the LEICAFLEX
SL 2 measures through the lens at full
aperture. Additional and therefore time-
consuming operations are eliminated.
20% of the light coming from the lens is
directed to the detector of the exposure
meter via a cylindrical deflecting mirror
arranged behind the hinged mirror. The
detector is a CdS photo-resistor built into
the bottom part of the camera and
arranged so that no stray light influences
the measurement. The outline of the
measuring range of the exposure meter
is indicated by the two semicircular
markings top and bottom right on the
edge of the viewfinder image.
The exposure meter is switched on and
off with the rapid transport lever (4). In
the LEICAFLEX SL 2 the exposure meter
is switched off when the rapid transport
lever is parked against the camera body
in the resting position. It is switched on
when the rapid transport lever (4) is
swung into the measuring position (in the
LEICAFLEX SL 2 MOT special model the
exposure meter is constantly switched
on).
The measuring field of the exposure
meter is exactly defined in the viewfinder
by the large central circle. Thus the target
area for the focal length of all the lenses
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