Spotting scopes with diopter correction

Diopter adjustment

— this function allows people wearing corrective glasses to look through a telescope without glasses, with the naked eye, and see a clear image. To do this, the eyepiece of the pipe adjusts to the desired number of diopters (in "plus" or "minus") — hence the name. It is inconvenient to use a telescope with glasses for a number of reasons, and contact lenses are not suitable for everyone and are not always available “on the farm”; as a result, diopter correction can be a real salvation for a person with vision problems. The range of such adjustment is usually small — it rarely exceeds 5 diopters in each direction; however, even this is quite enough to fully or sufficiently compensate for moderate myopia or hyperopia.