carl zeiss jena binoculars deltrintem 8x30

#Carl zeiss jena binoculars deltrintem 8x30 serial number#

high transmission level in the middle of the visible spectrum,.

Isolated specks of dust on prisms.īluish on eyepieces and prisms. Inner tube black, corrugated and slightly shiny inside. A very big field of view for this parameters’ class. Measured by us amounted to 8.42 ± 0.03 degrees and was a bit smaller than in the specifications. In our 8x32 binoculars test we granted all the instruments the average mark of 1.5 points as in the case of the equipment of this class a tripod adapter is rarely used.Īpparent field of view of 67.5 deg (according to simple formula) and 61.1 deg (according to tangent formula). Individual focusing on the right eyepiece. You can’t defocus by applying pressure on eyepieces. Small central wheel (full turn of 400 degrees). The binoculars is neither waterproof nor nitrogen-filled. Eyecups a bit too small and not regulated. The transmission curve peaks sharply near 550 nm.Ī lot of reflections from the area near prisms.Ī classic Porro set of binoculars with an ocular bridge. The blur occurs in the distance of 64% ± 5% from the field of view centre.ĭistinct yellow. Quite significant, especially at the very edge. The distance of the first curved line from the field centre compared to the field of view radius: 31% ± 3% Good to average correction in the centre, not very high at the edge. You can find a narrow strap and a small soft case included with the binoculars.

#Carl zeiss jena binoculars deltrintem 8x30 serial number#

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.