Manual

Inscriptions "BnpaBo - To the Right", "BJieBo - To the Left", "CTn -

MPI" and arrows, indicating the direction of rotation, when adjusting

the sight are plotted on the nut fastening the knob of the deflection

correction mechanism.

The band of the sight angle knob, as well as the band of the

deflection correction knob each bears 60 divisions. The value of one

division equals 0-00.5. Divisions on knob bands serve for reading the

correction when adjusting the sight on the rifle.

The power source of the illuminating lamp is located in the seat of

the body. The seat is covered with a cap.

1.5.2. The sight optical system is designed for obtaining images of

objects located on the terrain and represents the monocular telescopic

system with permanent magnification.

The optical system (Fig. 8) consists of objective lenses, reticle,

reversing system, eyepiece lenses, screen, colored glass, light-orange

glass and protective glass.

The objective is designed for obtaining the image of the observed

object. In an objective focal plane an image is obtained reversed from

the left to the right and from the top to the bottom.

The reversing system is intended to obtain the real correct image.

The eyepiece serves to inspect an observed image and reticle.

The light-orange colored glass improves contrast of an image in a

dull weather.

The reticle represents a flat-parallel plate. The plate is provided

with the scales of sight angles and deflection corrections as well as a

range-finding scale. The field of vision view is shown in (Fig. 9).

Fig. 8. Optical scheme:

1, 2 - objective lenses; 3 - welded screen; 4 - reticle; 5, 6 -

lenses (relay-lens); 7, 8 - eyepiece lenses; 9 - light-orange

colored glass; 10 - colored glass; 11 - protective glass

The sight angle scale represents a number of angle marks up to the

range of 1300 m. When setting the sight angle knob scale at division

10, the peak of the second from the top angle mark will correspond to

the range of 1100 m, the peak of the third angle mark š to 1200 m, the

peak of the forth angle mark š to 1300 m.