Leica THAMBAR-M 1:2.2/90, Instructions Manual

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18
EN
TIPS ON LENS CARE
Dust on the outside of the lens is removed only with a soft-haired brush or a
soft, clean, dry microfiber cloth. We recommend micro-fiber cloths (available
from photographic and optical specialists) that are stored in a protective
container and can be washed at temperatures of up to 40°C (without fabric
softener, never iron!). If stains and fingerprints have to be removed, use such a
cloth and clean with a circular movement starting at the center of the lens. Do
not use the type of cloths used especially for cleaning eyeglasses since these
are impregnated with chemicals which can damage the glass used for high
performance lenses. For easy, smooth lens changes, the bayonet has had an
extremely thin coating of grease applied in the factory. With normal use, this
condition lasts for many years, even if the bayonet is wiped with a clean cloth
from time to time. If a degreasing agent is used for cleaning, the grease film
must be replaced afterwards. To do this, smear a small amount of Vaseline over
the bayonet with you finger and rub with a clean cloth.
Important
Make sure not to apply too much vaseline to the bayonet, especially to omit the
lens identification bar code (8), because residual grease could otherwise remain
in the recess and lead to further grime accumulating. This could even cause the
code to become illegible and thus interfere with some camera functions in
digital M-models.
In addition to the designation by type, each lens has an individual serial number.
Please note this number in your documents as a safety measure.