It is a Lens that is worn by a YANTAR-2K (Fenix) satellite from the Soviet Union. In 1964 they started the Yantar project to replace the Zenith satellite. The Yantar satellite was intended for espionage during the cold war.

30 Yantar-2K satellites have been launched, each with a flight time of 30 days. 2 launches thereof failed, including "Fenix no; 1".

It consisted of 3 parts, of which the "landing and camera system module / OSA" was recovered and could be reused up to 3 times. The camera system that was in the OSA was called: "Zhemchung-4", with this lens in front of it.

This lens has been used 3 times and then sent for storage.

The case is 66x66x147 cm in size and the lens has a diameter of 42 cm, is 132 cm long and weighs 158 kg. the total weight of the lens + case is 188 kg.

The lens consists of different parts, the front has a diameter of 40 cm and the last 23 cm. in total there are 3 colilation modules. in the middle there is a diaphragm that can be adjusted with the red dial.

Everything is visible on the photos and documents.