Bushnell 280751 Manual Del Usuario página 4

When the target's upper and/or lower limits are larger than the mils on the reticle, it can be measured in steps and the angle
can be obtained by summing up the value of each step. (The process will be similar to the one that is discussed in the linear
measurements section above.)
How to use the reticle to measure distance
The distance measurement of a target can be calculated by using the mil reticle. Refer to the example in Fig. 5 above. (Note:
the same concept and formula apply when using the vertical reticle either model Tactical binocular, 280750 reticle only is
shown in Fig.5).
The formula for distance measurement: L(km)=H(m)/w
L= the distance between the observer and the target (in kilometers).
H = the height of the target (in meters)
w=upper and lower angle of azimuth of the target measured with the binocular reticle (mil).
When measuring the distance, first, estimate the height or width of the target, then measuring upper and lower angle of the
target. Accordingly, you can calculate the distance between the observer and the target using the formula.
For example:
There is a lighthouse whose height is known to be approx. 30 m. (H=30)
The upper and lower angle of the lighthouse as measured against the reticle in Fig. 5 is 0 – 60 mils (w=60)
So, using the formula: L=H/w=30/60=0.5 km
Therefore: the distance between the observer and the lighthouse is 0.5 km.
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Model 28075
Fig. 4
Model 280750
Fig. 5