Leica APO-VARIO-ELMARIT-SL 1:2.8-4/90-280 Instructions Manual page 23

TIPS ON LENS CARE
EN
Dust on the outside of the lens should be removed only with a soft-haired brush or a soft, clean, dry
microfiber cloth. If stains and fingerprints have to be removed, use such a cloth and clean carefully
with a circular movement starting at the center of the lens and working towards the edge. The Leica
Aquadura ® coating allows simple cleaning. Do not apply any high pressure to maintain this property
for as long as possible, even when wiping extremly dirty lens surfaces. Although the coating is highly
abrasion-resistant, it can nevertheless be damaged by sand or salt crystals.
Special cleaning cloths for spectacles should not be used because they are impregnated with
chemical substances that could be harmful to the glass and coatings used.
Cleaning agents containing solvents or oil must never be used.
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.
19