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2.2.3. OPERATIONS IN THE DARK CONDITIONS
CAUTION
Bright sources such as light of fire, headlights, searchlights, etc.
can damage the NVG-7. Avoid exposing the NVG-7 to these types
light sources.
For start the operations in dark conditions:
1. make visual estimation of the illumination level in the viewing area
is less than 1 lux (late twilight sky conditions).
2. remove the front lens cap and place it over the lens housing.
4. push the button. a green glow will appear in the eyepiece (after a
slight delay).
5. observe the scene and adjust focus.
2.2.4. FOCUSING
to focus the NVG-7, first you will need to adjust the diopter. Simply
turn the diopter clockwise until it stops. then, while looking through
the diopter at an object, slowly turn the diopter back counter clock-
wise until the grain in the image is sharp.
DIopter aDjUStmeNt
leNS FoCUS aDjUStmeNt
5X leNS FoCUS aDjUStmeNt
8X leNS FoCUS aDjUStmeNt rING
FIGURE 2-17. NVG-7 FOCUSING
3X leNS FoCUS aDjUStmeNt
2-13
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