The binoculars doesn’t defocus under pressure. Little central wheel (full turn of 400 degrees) Moves smoothly and evenly. The binoculars are neither waterproof not nitrogen-filled. The eyecups are a bit too small and not regulated. The transmission curve reaches its maximum near 550 nm.Ī lot of reflections from the area near prismsĪ classic Porro device with the ocular bridge. The blur occurs in the distance of 62% ± 5% from the field of view centre.ĭistinct yellow. The distance between the first curved line and the field centre compared to the field of view radius: 31% ± 3% In the centre corrected between good and average not very high on the edge. In the set with the binoculars you get a thin strap and a small soft case. The binoculars feature the newer multi-coatings then. CARL ZEISS JENA BINOCULARS 8X30 SERIAL NUMBER SERIAL NUMBERThe specimen, tested by us, had the serial number of 6173583, which means it was produced in 1985. Its production, already under the Docter brand name, ceased only ca.1995. In 1978 they started to use new multilayer coatings with a 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 binoculars got a new Erfle 5-lens eyepiece which was supposed to give a wide field of view with a minimum distortion level. During the WWII the producers started to cover their air-to-glass surfaces with a single anti-reflection layer of magnesium fluoride. At first those binoculars were equipped with a 4-element eyepiece without any anti-reflection coatings. Most probably it was the instrument of identical construction but for the civilian market.īoth the Deltrintem and the Jenoptem are classic devices with achromatic objectives and Porro prisms. In 60s, 70s and 80s of the 20th century the Jenoptem 8x30 model was manufactured along with the Dletrintem model. The Carl Zeiss Jena Deltrintem 8×30 set of binoculars and its version with individual focusing called Deltrentis were produced practically ceaselessly in Jena from 1920 to 1990. 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.
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