Night Optics Falcon 6x Gen 3 Gated Long-Range Night Vision Binocular - Manual (Page 73)

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2-8 INSTALLATION OF DEMIST SHIELDS
Install the demist shields as follows: Refer to Figure 1-2.
If the demist shields need to be cleaned, make
sure they are dry and use dry lens paper to clean.
If the demist shields are wiped while wet or with
wet lens paper, you will damage the coating.
NOTE
If inclement operating conditions are expected
(e.g. significant temperature change and high
humidity), install demist shields to minimize
eyepiece lens fog prior to mission.
(1) Carefully remove eyecups.
(2) Carefully press a demist shield onto each eyepiece. Be
careful not to smudge the eyepieces or demist shields.
(3) Install the eyecups per paragraph 2-7.
2-9 INSTALLATION OF SACRIFICIAL WINDOW
Install the sacrificial window as follows: Refer to Figure 1-2.
If adverse operating conditions (dust or sand), are
expected, attach the sacrificial window to protect
the objective lens from scratches or other damage.
(1) If the compass or objective lens cap is in place, remove
it.
CAUTION
CAUTION