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13
5.11 Installation of add-on lenses.
Always make sure that the goggles is switched off when you
put on or take off the add-on lens.
Note: The following procedure is identical for 3x or 5x lenses
(or any other add-on lenses).
Turn off the goggles. Remove the lens cap. Press the lens firmly
towards the eyepiece. Do not apply excessive pressure. Make
sure that the lens is fixed well on the goggles. To return the
goggles back to 1x magnification, pull off the lens.
5.12 Demist shield and sacrificial window
Note: Demist Shield and Sacrificial Window are optional.
Sacrificial window protects the objective lens from the abrasive
influence of sand and dust in the night time. It should be put on
the objective lens like an objective cap with the daylight filter.
FIGURE 4
NVS 15 Single unit with
attached 3x lens