13
14
the distance between the target and the observer
is 550m.
4.2.5 How to measure a target’s size (height
and width) using azimuth readings
According to the formula for distance meas-
urement, you can calculate the height using:
H = D x K.
When measuring the size, you first estimate
the distance to the target, then measure the
azimuth or upper and lower angle. With these
measurements, you can calculate the height of
the target using the formula. For example: the
distance is 0.6km between the observer and the
target. You can measure that the azimuth is 60
(0-60) and the upper and lower angle is 30 (0-30).
So, using the formula you can get:
The height: H=0.6 x 30= 18m
The width: h=0.6 x 60=36m
4.3 How eyeglass users can use long Eye relief
feature
If you wear prescription glasses or regular sun
glasses, you can still obtain a full image view by
turning down the rubber eyecups on each of
the eyepieces or oculars. All binoculars feature
fold down eyecups, but only binoculars, like this
model, featuring a long eye relief optical system
Summary of Contents for 7x30
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