Distance Metering; Superimposed Image Method (Double Image); Split Image Method - Leica M8.2 Instructions Manual

Distance metering

Due to its large effective metering basis, the range finder
on the LEICA M8. is very precise. The benefits of this
2
are particularly noticeable when using wide-angle
lenses with their relative high depth of field.
Mechanical metering basis x viewfinder
(Distance between the magnification
optical axes of the viewfinder
window and the range finder
viewing window)
69.25 mm x 0.68
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.
126 / Distance metering
= Effective
metering basis
= 47.1 mm
Double image = out of focus
Interrupted line = out of focus

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
metering field with no misalignment. Then choose the
subject detail.
Coincident image = in focus
Continous line = in focus
In practice, there is often no clear distinction between
the two methods. The two criteria can be used to
great effect in combination.