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3.2 Body assembly ( Fig. 2)
Figure 2, illustrates the basic design and
str ucture of a por ro prism binocular like
the 7x30. The binocular consists of identi-
cal two halves. A right side and a left side.
Item 1 is the lens assembly including the spe-
cial reticle housing. The range adjustment for the
diopter settings is from -5 to+7. Each mark of the
diopter dial on the eyepiece ref lects one diopter
adjustment. Item 2 is the main binocular body
housing the por ro prism assembly. Item 3 is the
objective lens assembly where the light from the
image enters the binocular. Item 4 contains the
inter pupillary disc indicating the settings that
cor respond to the distance between the observ-
er's eyes. This distance ranges from 56 mm to
72 mm. Item 5 which is on the connecting shaft
3
5
1
2
4
5
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