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   Viewing devices: PNB-2
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This instrument was designed for observing both ground and air targets. 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 (-20 to +60°) permits air target surveillance or astronomical use. 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

Diopter adjustment, diopter

±5

Range of motion in azimuth, deg

360°

Range of motion in elevation, deg

-20° +60°

Overall dimensions of the device, mm

445x320x318

Overall dimensions of the case, mm

550x450x450

Weight of the device, kg

35

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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