The specimen we’ve tested is marked with a serial number of 6206318 which means it was produced in 1985 and, being so, it already boasts newer multilayer coatings. Its production, already under the Doctor brand name, ceased only ca.1995. In 1978 the producer started to use new multilayer coatings with the characteristic orange-purple hue.Īround 1990 when the Jena plant was taken over by the Docter company, the binoculars not only didn’t go out of production but even were given improved multi-coatings. In 1947 the ocular was replaced by an Erfle design with 5 lens-elements which was supposed to provide a wide field of view with minimum distortion level. During the WWII one layer of magnesium fluoride coating was put on air-to-glass surfaces. At first these binoculars contained 4 lens-elements ocular without any antireflection coatings. These are classic Porro prism instruments with achromatic objectives. The Carl Zeiss Jena Deltrintem 8x30 binoculars and its individual focus version, known under the name of Deltrentis, were produced in Jena from 1920 to 1990 practically without cease. You can change your consents to the use of cookies at any given time. In this document you can find more information concerning browser settings and the way we and our social network, advertising and analytics partners process your data. If you fail to do so you should be aware that we are going to process your data according to our Privacy Policy. You can switch cookies off by adjusting your browser settings so if you donât agree with our cookie policy please, change your browser settings or leave our website. Our partners might combine information, obtained on this site, with other data they get from you as you make use of their services while surfing the internet. Information about your browsing habits is shared with our social network, advertising and analytics partners. As in the case of almost all other websites, cookies help us to personalize ads, offering you the most relevant information, allow you to share pages with social networks, make our services work as you expect and, overall, help us to monitor and improve our performance.

Wwii carl zeiss jena binoculars