- The night distant observation device (index 1PN91-2), the article 1PN91-2 (hereinafter referred to as the article) is designed for battlefield observation, target recognition and adjustment of shooting at night.
- It is possible to carry out the following operations with the help of the article: measuring of horizontal and vertical angles, defining azimuth and target angle of elevation, measuring distance to the target if its dimensions (height or direction) are known.
- The article operates in ambient air range from -50 to +50 °C and relative humidity at 100% at temperature +25 °C.
- Magnification, x : 6.5
- Field of view, deg : 5.5°
- Eye relief, mm : 50
- Exit pupil diameter, mm : 4.75
- Ocular setting range, diopter : from – 4 to + 4
- Angle-of-adjustment range, for target position, etc./for horizontal, etc. : from – 3-00 to 3-00/from 0 to 60-00
- Limb scale factor, rough reading, etc./fine reading, etc. : 1-00/0-01
- Focusing range, m : from 50 to ?
- Maximum voltage, mA, for sighting device consumption/for illuminator consumption : 40/40
- Power batteries voltage, V, two accumulators NLTs-0.9-1/two batteries R6 (AA)/element ТHL-316 : 2.4/3.0/3.6
- Minimum continuous operation time of the vie-wfinder, the switch handle being in the position 11, without changing power supplies, h, at temperature; from 0 to +50 °C / from 0 to -40 °C / -50 °C : 10/3/0.5
- Maximum time needed to get the article ready for the battle operation after power is switched on, sec : 4
- The sighting device maximum weight, kg : 3
- Maximum weight of the set in action position, kg : 8
- Maximum weight of the set in stowed position, kg : 13
- Overall dimensions of the sighting device, mm, height/length/width : 164x351x130
- Overall dimensions of the case, mm, height/length/width : 200x707x400