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System
accessories
M6TTL
Interchangeable lenses
The LEICA M system is ideal for fast and
candid photography. The range of lenses
comprises focal lengths from 21 to 135 mm
and widest apertures of f/1.
Filters
In black and white photography, filters are
used for controlled rendition of tonal values, for
example in order to achieve a natural
reproduction of different colours in grey tones,
or in order to improve the appearance of the
sky or clouds on the picture. In colour
photography, filters can be used to adjust
colour rendition to the wishes of the user or to
the spectral sensitivity of the film employed.
A range of different filters, equipped with
standard filter thread sizes, are available for
the current LEICA M lenses, including a uni-
versal polarising filter.
When the exposure is metered through the
lens, any reduction in the quantity of light by
the filter is automatically taken into account.
However, films have different sensitivities in
for
the
LEICA
the individual spectral ranges; consequently
denser, more extreme filters may cause
deviations from the correct exposure. For
example, orange filters generally require one
stop more exposure; red on average two stops
more. A universally valid correction factor is
not possible as the red sensitivity of black and
white films varies considerably.
Eyesight correction lenses
For optimal matching of the viewfinder to the
eye,
correction
strengths are available (dioptres, spherical):
0.5/1.5/2/3.
42
lenses
in
the
following
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