134 / Distance metering
Distance metering
Due to its large effective metering basis, the range -
finder on the LEICA M9 is very precise. The benefits of
this are particularly noticeable when using wide-angle
lenses with their relatively deep depth of field.
The range finder metering field is visible as a bright,
sharply defined rectangle in the center of the view -
finder. If you keep the large viewfinder window (1.6)
closed, only the activated bright-line and this metering
field remain visible. The focus can be set using either
the superimposed image or split image method:
Superimposed image method (double image)
In a portrait, for example, aim the metering field at the
eye and turn the distance setting ring on the lens until
the contours in the metering field are brought into
line. Then choose the subject detail.
Split image method
When taking photographs of architecture, for exam-
ple, aim the range finder metering field at the vertical
edge or another clearly defined vertical line and turn
the distance setting ring on the lens until the contours
of the edge or line can be seen at the limits of the me -
tering field with no misalignment. Then choose the
subject detail.
In practice, there is often no clear distinction between
the two methods. The two criteria can be used to
great effect in combination.
Double image = out of focus Coincident image = in focus
Interrupted line = out of focus Continuous line = in focus
Mechanical metering basis
x viewfinder = Effective
(Distance between the magnification metering basis
optical axes of the viewfinder
window and the range finder
viewing window)
69.25mm x 0.68
= approx.
47.1mm
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