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Fig. 1
Distance measurement (BN 7x50 C)
Using the MIL crosshairs for distance
measurement (telemetry system)
With the MINOX BN 7x50 C 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.
Fig. 2
This is then calculated as follows:
100 x 80 meters divided by 6.7, resulting in a distance
of 1,194 meters.
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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
Elevation angle = Vertical angle
Azimuth angle = Horizontal angle
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