carl zeiss jena binoculars df6x serial number

There are several major modifications of this model:ġst version: 6x21 - the one, where the lens frame and the lower prismatic cover are made as one component (starting from 1906/1907) and having the eyepieces case with the “transverse” knurling (see photo). This device became the most popular military binocular of the First World War and its release stopped in the 30s of the last century, before the Second World War. The new version of military binocular D.F.6х (its old version is available by the following link: ) appeared a little bit earlier than its “civil twin” – namely Telex binocular -, around the end of 1906.

In addition, the prisms inside the binocular were no longer pressed by prismatic covers, but they were fixed with special flat springs, which increased the device reliability significantly. Optical characteristics were significantly improved for the new devices (field of view and the lenses diameter were increased, while optical aberrations were reduced), and the devices’ construction was also changed: the central hinge and the “ears” for the neck strap were not attached to the binocular with the help of screws any more - they became the whole part with it instaed, an eccentric lens alignment system appeared and the design of its frame changed, prism covers spanned the binocular body and they were lubricated with a special compound at the joints with the purpose of tightness improvement. In 1906-1907, Carl Zeiss radically changed the construction and the design of his binoculars (both “civilian” and military ones).

Carl zeiss jena binoculars df6x serial number