Using Filters; Close-Up Pictures - LEITZ LEICA M5 Instructions Manual

Using filters
With through-the-Iens light metering,
the energy absorbed by filters will ge-
nerally be automatically taken into ac-
count. Different films, however, differ in
their individual spectral response. Very
dense filters, as well as those lying near
the red and blue ends of the spectrum,
may therefore sometimes introduce an
error. If in doubt, measure without the
filter, then apply the standard filter
factor. In general , a dense orange filter
will require perhaps one full f/stop more
than the meter indicates, a red filter two
f/stops more. No more exact data can
be given because of the great differen-
ces in the red sensitivity of black-and-
white films .
With the LEITZ polarizing filter, rotate
the disc in front of the viewfinder until
the desi red result is obtained ; then
swing the filter in front of the lens and
make the light measurement without
any additional rotation .
Close-up pictures
When making close-up pictures, for
example with the Bellows Focusing Unit,
there is no need to consider the expo-
sure increase factor introduced by
lens-to-film extension. The LEICA M 5
through-lens light meter takes this auto-
matically into account.
The LEICA M 5 cell carrier arm
The CdS meter cell of the LEICA M 5 is
mounted on a swinging carrier arm.
When the lensmount is empty, the cell
is hidden in its bottom recess . Inserting
a lens causes the cell to move to its
central measuring position , if the shut-
ter is tensioned. First pressure on the
shutter release causes the cell to move
down into its recess, where it remains
until the film is again transported.
Never touch or play with this sensitive
mechanism!
If you wish to see the cell carrier arm in
action without endangering the mecha-
nism , insert either the empty mount of a
50mm SUMMICRON ® f/2 lens, or a
sGrew-to-bayonet lens adapter (Nos.
14097,14098, 14099) . But no fingers,
please!
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