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Looking after your LEICA and its lenses
LEICA lenses act like burning glasses if the
LEICA lies with the lens face upwards in full
sunlight. You must therefore protect the
housing and the shutter by putting on the
lens cap or keeping the camera in a case,
or in the shade.
Each lens has, in addition to its type, its
"personal" serial number engraved on it.
You should make a note of this number as
well as of the serial number of the camera
engraved on the top of the LEICA. This can
be very helpful indeed in case of loss or
theft.
The coating of LEICA lenses, together with
the use of special UV-absorbing cement,
achieves effective exclusion of ultraviolet
light. This ensures consequently that all
lenses possess the same colour-
transmitting properties, irrespective of focal
length. The external anti-reflection coatings
are wipe-resistant.
Dust should be removed with a soft sable
brush, a piece of cotton cloth (e.g. a hand-
kerchief) washed several times, or lens
tissue. Special cleaning cloths, such as are
used for the cleaning of spectacles, are not
recommended, as they are chemically
impregnated and might attack the lens
surface (glass used for spectacles has a
composition different from that of optical
glass for high-quality lenses).
A colourless UVa filter can be left
permanently on the lens, where it will
protect the front element from external
influences, e.g. of sand or sea water spray
on the beach.
The lens hood, too, protects the lens from
accidental finger marks and raindrops.
Protect your precious lenses with the
appropriate lens caps.
