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Distance measurement
Using the MIL crosshairs for distance
measurement (telemetry system)
With the MINOX BN 7x50 C II you can use the analog
reticle plate (crosshairs) to determine the distance
of observed objects. Distance measurement can be
carried out with the aid a simple equation, as long as
the height or length of the observed object are known
with sufficient accuracy: in practice the size (height/
length) is usually known because the observed objects
are mostly people, buildings or vehicles.
Example for calculating the distance
The height of the lighthouse is 80 meters. The value
read off the reticle plate is 6.7.
This is then calculated as follows:
100 x 80 meters divided by 6.7, resulting in a distance
of 1,194 meters.
Fig. 1
Fig. 2
Elevation angle = Vertical angle
Azimuth angle = Horizontal angle
Distance (in m) =
Height of observed object (m) x 100
Elevation angle of observed object
Distance (in m) =
Length of observed object (m) x 100
Azimuth angle of observed object
(as purchased) when looking through the binoculars.
In this condition the pupil of your eye is at the
correct distance to the ocular lens. This adjustment
also ensures a steady positioning of the binoculars
against the eye and minimizes stray light. When
looking through your MINOX BN 7x50 C II wear-
ing glasses you must fold down the rubber
eyecups to enable you to see the entire field of view
right into the edges.
Warning:
Do not use your MINOX binoculars to look
at the sun or other bright sources of light to prevent
any eye injury.
Attachment to a tripod mount
To ensure steady and fatigue-free viewing you can
mount your MINOX BN 7x50 C II on a tripod using the
tripod thread integrated in the body. For this pur-
pose we recommend the MINOX tripod mount (order
number 69727) that is available from our range of
accessories.
To use the tripod mount first remove the cap screw (7)
from the tripod thread on the underside of the MINOX
BN 7x50 C II. Connect the MINOX tripod mount to the
thread turning it in clockwise direction.
Keep the cap screw (7) in a safe place and screw it
back into the tripod thread after removing the tripod
mount.
Inserting and changing the batteries
Your MINOX BN 7x50 C II has a compass with a display
that can be illuminated in the dark at the press of a
button. For this the compass requires two batteries
of the type LR 43.
To insert or replace the batteries proceed as follows:
1. Open the screw cap on the battery compartment
on the bottom of the binoculars by turning it in
counterclockwise direction (Fig.1)
2. Take the old batteries out of the battery compart-
ment. (Fig. 2) and insert two new batteries of type
LR 43 in the battery compartment (pay attention
to correct poling).
3. Tighten the screw cap on the battery compartment
again by turning it in clockwise direction.
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