transmission weak for contemporary standards.not bothersome brightness loss on the edge of the field of vision,.Prisms without any scratches.īluish single coatings on most of air-to glass surfaces – one or more of these seem not to be covered at all. A typical field of view for this type of equipment. Measured by us amounted to 7.28 +/- 0.04 degrees and it was in accordance with the specifications. Individual focusing on the right eyepiece is a bit uneven and it moves the whole eyepiece.Ī tube in the centre of the binoculars to which you can attach an adapter.Īpparent field of view of 51.7 deg (according to simple formula) and 48.6 deg (according to tangent formula). The bridge’s work is slightly uneven and when pressured strongly, the binoculars defocus. Hard eyecups, a bit too small and not regulated.Ī narrow, finely ribbed central wheel, moves smoothly in the range of 360 degrees.
CARL ZEISS JENA BINOCULARS DF 7X50 PLUS
A very yellow image.Ī classic Porro - metal plus leather padding. Very weak transmission in the blue part of the spectrum. The blur occurs in the distance of 73% +/- 3% from the field of vision centre. It starts near 65% from the field centre and is medium on the edge (a thin comma). The distance of the first curved line from the field centre compared to the field of vision radius: 30% +/- 5% There were no caps for eyepieces or objective lenses. The buyers got a leather strap, and a hard case with its own strap. As the multicoatings weren’t used at that time, the device features ordinary bluish single coatings. Despite its 40+ years, this pair of binoculars remains in great working order. The model we tested here is an old construction from 1968. The Binoctem 7x50 was produced with its sibling Jenoptem until 1990 so reaching the time when the plant in Jena was taken over by the Analytik Jena company they has been producing Docter binoculars ever since. The production of Binoctar was ceased in 1971 so it didn’t live through long enough to see multilayer T3M coatings (implemented in 1978). The main difference was the implementation of single-layer antireflection coatings. As a result the weight of the Binoctem decreased from 1300 grams to 860 grams (only to rebound later to 1010 grams).Īfter the war, when the Carl Zeiss Jena plants happened to be on the territory of the German Democratic Republic, the production of both binoculars was continued. In 1937 both 7x50 models underwent a slimming treatment because the metal used for their casing was changed. The Binoctem model, featuring a bridge and the central focusing, hit the shelves in 1931. In that year the Carl Zeiss Binoctar 7x50 was launched - optically the same device but with an individual focusing system. The history of the Carl Zeiss Binoctem 7x50 model goes back to 1919. 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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