Using The Compass - FujiFilm FUJINON FMT Series Instruction Manual

Using the Compass

Compasses include a scale as shown in the diagram. Focus
on a far object and the scale will appear clear in the fi eld of
view (left side). The scale located on the top half of the fi eld
of view measures distance or the size of the object; the com-
pass reading located on the bottom half of the fi eld of view,
indicates the direction in which the object is facing. Scale is
measured in units called "mil". One mil is equal to the angle
needed to view a 1-meter object at a distance of 1000 me-
ters. The binoculars feature a scale of up to 70 mils vertically
and 80 mils horizontally, at intervals of 5 mils.
Reading the Scale
In order to measure distances, it is necessary to
know the size of the object.
Object size
Distance =
Scale reading
Example:
Object size: 10 m
Scale reading: 50 mils
Distance A = 10 ÷ 50 × 1000 = 200 m
In order to measure size, it is necessary to know the distance to the object.
Distance × Scale reading
Object size =
Example:
Distance: 200 m
Scale reading: 50 mils
Object size = 200 × 50 ÷ 1000 = 10 m
(7X50 MTRC-SX / FMTRC-SX only)
Measuring Distance
× 1000
Calculating Object Size
1000
ENGLISH
360
Direction
90 = east
180 = south
270 = west
360 = north
360
A
EN-6