L–21 advertising magnifier

Magnifying glasses are optical instruments used for observation of the object with a certain increase, and those equipped with measuring scale are used to measure length.


Technical data:

Magnification 2.5 x
Focal length (mm) 89.17
Lens diameter (mm) 30/40
Linear field of view (mm) 22/32
Distance betwen the object and the surface of the lens – nominally (mm) 85