the lens caps are made with rounded edges (the previous version of this model had grooves on the caps for spurious flares minimization)

the binocular design is characterized by long carcass and short lens frames (the first version of this model had another design, with short carcass and long lens frames of the double-ring type with leather coating) The presented specimen refers to the fourth version of this model (it was produced since 1915) and has the following features: The Silvarem 6x (30) binoculars turned out to be very successful in design and optical characteristics and was produced from 1909 to 1969. Subsequently, all civilian Carl Zeiss binoculars with central focusing had an “.em” ending in their designations. First models of central-focus binoculars appeared in T136 catalog in 1910–those were Teletur 6x15, Telexem 6x21, Telactem 8x24 and Silvarem 6x30.

First prototypes of these binoculars were produced in Jena back in 1907, but only in 1909/1910 Carl Zeiss was forced to begin mass production of the devices of such design under the competitors’ pressure and because of the demand. Carl Zeiss engineers were not in a hurry with such devices’ production, since they considered them less reliable and protected from dust and dirt. Binoculars with central focusing appeared on the market in the middle of the 19th century.

Carl zeiss jena binoculars 6x30