English: During the expedition to the salty lake Elton, which is located in the semi-deserts of the Volga region, ornithological research was conducted. Often, scientists were located directly in shallow water or in the coastal zone of the lake, where there is a lot of silt and a very aggressive environment for the technology. Accordingly, during the break in the observations, it was necessary to invent how to put binoculars so that they would not suffer.

English: Ornithological expedition, salted Lake Elton. In order not to contaminate binoculars, it was necessary to form a pyramid.