BERKAN 20 an armoured vehicle commander’s periscope is a day optical device with a monocular structure.
The periscope consists of a 1x wide-angle view magnification and a 6x target identification optical system. The mirror in the housing of the device is used by both optical systems. The position of the mirror is controlled vertically by the operator and the angle of view can be changed in the vertical direction. The 6x optical system has an ocular diopter adjustment and an illuminated reticle for distance measurement.