Noblex NF 7 x 50 C advanced User Manual page 9

set individually for the respective eye at the corresponding eyepiece. Make
adjustments to the eyepieces until you notice an uniform, sharp and circular
image.
Attention: The adjustment for right and left should be done by viewing the
same object at about 50 m distance, in order to avoid any misadjustment.
Distance adjustment
If the two eyepieces are set to your acuteness of vision, no readjustment is
necessary for observing at different distances. Only for the observation of
objects which are close to the near point of the binoculars, a re-adjustment
of the eyepieces may be necessary.
Fastening the carrying strap
The carrying strap holders (5) are attached near the two eyepieces. The strap
must be threaded through these two eyelets. Please remove the synthetic pins
to reach the sling loops. Use a tool such as an allen key to remove the pins and
be carefully to avoid any damages (see pictures p. 22). After the carrying strap
has been fastened on both sides, the desired length can now be adjusted.
Eyepiece protective cap
The binoculars are equipped with a lens cover (6) to be protected from dust,
rain and sand. Just put the cover on the oculars. Further, it is possible to
fasten the cover to the sling which is attached to the sling loops.
The cover loop on the right side is slotted to make sure that the cover can
be removed one-sided without releasing it completely. During operation of
the binoculars, this may cause the eyepiece cover to hang down loosely and
does not affect the view.
Fastening the objective lens protective cap
To attach the objective lens protective cap (7) to the binoculars, the loop
on the holder for the objective lens protective cap (8) must be placed over
the cover of the tripod thread and inserted. The loop must be completely
inserted behind the cover.
Mounting on the tripod
The device can be mounted on a standard tripod, by means of the existing
connection thread ¼". For this purpose, the cover (6) located on the under-
side must be removed.
Attention: The cap has no securing loop and can therefore be easily lost due
to the small size. Therefore, pay attention to where you store it while using
the tripod thread.
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RANGEFINDING BY MEANS OF THE COMPASS
General Information
Operation of the compass
An analog compass is integrated in the Noblex 7x50 C, which indicates the
respective direction observation, in degrees. North corresponds to 360°,
East 90°, South 180° and West corresponds to 270°. With the help of the in-
tegrated graticule, distances and object dimensions can be determined. The
graduation lines, which range horizontally from -4 to +4 and vertically from
0 to +8, each have a distance of 1 mil. Converted to a distance of 1000 m, the
lines spacing is 1 m and thus enables a simple conversion in mind.
Switch on/off of the compass lighting
The compass of the binoculars is equipped with a lighting button. When the
button (10) is held pressed, the compass display is backlit in red. When the
button is released, the light goes off again.
Daylight inlet
The daylight inlet (11) is used to illuminate the compass during the day; it is
not compelling to switch on the compass lighting. The light passage must
not be covered with your fingers, otherwise the display is not readable.
Measurements
Determination of position by means of the compass
By means of the compass binoculars, the current position can be simply
determined with the aid of a topographic map. For a precise determination,
a total of two reference values are required here.
Example:
One person is traveling by boat, but the current position of the boat is
unknown to the boatman and should be determined. In the figure a) below,
the drawn arrow illustrates the direction of travel of the boat. The following
reference values can be used to determine the position:
Reference value 1: If the user looks on board at the targeted buoy with his
compass binoculars, he will see that 190° is displayed. Thus, the difference
between the South (180°) and the targeted buoy is 10°.
Reference value 2: The lighthouse drawn and targeted with the help of the
compass binoculars, in figure b) is located at 120° from the boat (300°-
180°=120°).
Result: The exact position of the boat can now be determined by superim-
posing the two determined course lines to the reference points. The current
position is where the two lines intersect.
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