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   Viewing devices: PNB-1
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This instrument was designed for surveillance, reconnaissance, and artillery fire correction. The eyepieces are inclined 30 degrees to the optical axes of the large 110mm objective lenses, which provide tremendous light-gathering power. The large range of motion in elevation (-30 to +60°) permits air target surveillance or astronomical use. A sturdy tripod with levelling adjustments is provided, along with graduated scales for measuring azimuth and elevation. The integral interchangeable filters include blue-green to protect the observer's eyes against laser radiation; light orange to increase contrast under hazy or foggy conditions, and neutral density for observing under brilliant daytime conditions.

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Standard Specification

Clear aperture, mm

110

Magnification

15

Field of view, deg

6

Eye relief, mm

15

Exit pupil diameter, mm

7.3

Limiting resolution, arc. sec

4

Range of interpupilary adjustment, mm

59-72

Diopter adjustment, diopter

±5

Range of motion in azimuth, deg

360°

Range of motion in elevation, deg

-35° +60°

Angular measurement accuracy, mil

0-05

Scale division, mil

0-10

Overall dimensions of the device, mm

400x580x402

Overall dimensions of the case, mm

562x635x342

Weight of the device, kg

30

Weight of the device packed, kg

48

Weight of tripod, kg

6.5

 

Optical scheme of PNB-2

Basic optical train.
1, 2, 5, 9 - lenses; 3, 4, 14 - prisms; 10 - neutral density filter;
11 - light orange color filter; 12 - blue-green color filter; 13 - reticle.

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