Anti-aircraft Automatic Sight ZAP-23 is designed to aid in accurately meeting the projectile with the target during direct fire, regardless of the position of the target (i.e. in the air or on the ground). The sight is included in a 23 mm twin launcher Zu-23, which is a worthwhile instrument for aiming at targets located in the air at a distance up to 2500 m and altitude up to 1500 m.

Technical characteristics
Sight 2Ts 27:
Range of distance scale: 0 – 2000 m
Range of speed scale: 0.300 m/sec
Target course: no limitation
Scales of landing angles: 0° to 90°
Elevation angles: 0° to 60°
Distance scale (value of one scale division): 100 m
Speed scale (value of one scale division): 5 m/sec
Course scale (value of one scale division): 1°
Scales of landing and elevation (value of one scale division): 5°
Range of elevation angles (value of one scale division): -11°15′ to +92°
Guide inclination angle toward the sight
control area (value of one scale division): 1°50′ ± 5′

Optical sight 1 OM 8:
Magnification: 3.5 x
Field of view: 4°30′
Resolution: 17′
Exit pupil diameter: 6 mm
Exit pupil distance: 72 mm
Range of fire distance: 500 – 2000 m
Value of one scale division of the distance scale: 100 m
Range of sight correction, artillery
thousandths (1/6000): ± 0 – 10
Value of one scale division of the sight correction,
artillery thousandths (1/6000): 0 – 010
Parallax: ≤ 2′′
Collimator KV-L:
Value of one scale division, artillery thousandths (1/6000): 0 – 05
Parallax, artillery thousandths (1/6000): ≤ 0 – 01
Operating temperature: -50°C to +50°C
Storing temperature: -55°C to +60°C