Steiner Optik 15x80 M1580c Military Binoculars (Compass) - Manual (Page 13)

13
Use of Reticle (cont’d)
In determining range, if an object fills one 10 mil unit marking on the horizontal reticle
scale and is known to be 10 meters wide, the object is 1000 meters away. If the same size
object fills two unit markings (20 mils), it would be 500 meters away. When this formu-
la is used, the distance will be given in the same units of measurement (feet, meters, etc.)
as is used in estimating the known size of the object. The same formula can be used to
determine range with the vertical reticle scale when the height of an object is known. The
use of the vertical scale is preferred (especially on level terrain), since objects are often
viewed obliquely along the horizontal axis.
DISTANCE
=
Known size
x 1.000
Scale Size
Size
=
Distance x Scale Size
1.000
10 METERS