Leica M9 Instructions Manual page 52

Note:
An exposure compensation set on the camera only
influences the measurement of available light. If you
want to simultaneously use compensation of the TTL
flash exposure metering in flash mode – in parallel or
in the opposite direction, you must make this addition-
al setting (on the flash unit). Refer to the sections on
flash mode from p. 143 for details.
138 / Exposure compensation
Example of a positive compensation
With very bright subjects, such as snow or a beach,
the exposure meter specifies a relatively fast shutter
speed due to the extreme brightness. As a result, the
snow shows up in an average gray and any people in
the photograph are too dark: this is under exposure!
To remedy this problem, the shutter speed needs to
be lenghtened or the aperture increased, i.e. a setting
1
of perhaps +1 / EV needs to be made.
3
Example of a negative compensation
For very dark subjects that reflect very little light,
the exposure meter selects a shutter speed that is too
slow. A black car will appear gray: this is over expo-
sure! The shutter speed needs to be shortened, i.e.
a setting of perhaps –1 EV is required.