Newcon Optik 20x40x100 - Manual (Page 10)

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8. STORAGE AND MAINTENANCE
Big Eye 20(40) x l00 high magnification binoculars are a
precision optical instrument. It should be handled with
utmost care when in operation, storage and transportation.
When using and storing, the binoculars should be kept
clean. If dust, grease or dirt is found on the glass surface,
gently wipe it off with a piece of clean cloth or lens paper.
It's forbidden to wipe lens off with fingers, ordinary paper
or dirty cloth.
In case of any malfunction, please contact the
manufacturer; never disassemble the binoculars yourself.
Inspect the condition of the cartridge with desiccant.
During the seasons when relative humidity tends to
increase (specifically in fall and in spring) proceed with
drying the binocular twice a month.
During the colder season of the year, when the ambient
temperature drops below zero, be sure to periodically
rotate the mechanisms, so as to protect them against
freezing.
The binoculars should be stored at temperature range
between +5°C and + 35°C and relative humidity not more
than 70%. The premises should be well ventilated. It's not
permissible to store the binoculars with chemicals, such
as acids, alkalis, salts and batteries etc. The binoculars
cannot be exposed to open heat closer than 1.5 meters
from the heat source.