In the 50s and the 60s of the twentieth century the Jena factory was producing several tens of thousands binoculars a year. The Deltrentis and Deltrintem 8x30 models as presented by the 1952 Carl Zeiss Jena catalogue. It was a huge leap forward, that difference made the image sharpness and its contrast far better. As the coatings of that time reflected about 1.5% of light on one air-to-glass surface the transmission of described binoculars in the centre of the visible spectrum increased from about 50-60% to about 70-80%. The 1939 Deltrintem, presented in photos, doesn’t have any antireflection coatings so you might assume that the first Deltrentis and Deltrintem devices with such coatings on elements and prisms appeared after 1939. marketing material published in Polish by Carl Zeiss Jena in the 50s of the twentieth century) state that the first instruments with such coatings were launched on the market already in 1937. It was the beginning of one-layer antireflection coatings T (from the word Transparenz) which were used for the first time in binoculars during II WW. In 1935 an Ukraninan physicist Olexander Smakula working in Germany discovered that if you put on a lens a very thin layer of a substance which refraction index falls between the refraction indexes of air and glass, the amount of light reflected from an air-to-glass surface decreases notably. The real transmission values of 6x30 and 8x30 binoculars produced before II WW reached just 40-50%.Ĥ-element Koenig eyepiece, from Deltrentis and Deltrintem models produced in 1920-1947. Taking into account losses of light on every surface amounting to about 4.5% the transmission of the whole system didn’t exceed 63%.In reality it was significantly lower than that because the light absorption in older types of glass was higher, especially when it comes to blue light. The original optical construction of 8x30 models featured as many as 10 air-to-glass surfaces. There were no antireflectiion coatings so fewer air-to-glass surfaces meant higher transmission.
Such a small number of air-to-glass surfaces was a norm in those times. As the eyepiece they decided to use a wide-angle (68 degrees) Koenig system consisting of four elements but positioned in just two groups (3+1). The binoculars were a small, classic instrument with an achromatic objective lens (a glued crown and flint glass doublet) and type I Porro prisms with air between them. The Carl Zeiss Jena Deltrintem 8x30 binoculars from 1939. After the purchase you could enjoy an instrument just slightly worse than the best binoculars available on the market. Optically it was the best device offered in the Communist Block for a more or less normal amount of money in other words these were binoculars you could dream of with a real hope that one day those dreams would actually come true. Still if you wanted to own better equipment you had to think about a Zeiss from Jena. Their quality might have left a lot to be desired but their price was affordable. For a change Porro instruments produced in Russia, (BPC), Poland (PZO), Czechoslovakia (Meopta), Bulgaria (OMZ) or Romania (IOR) were quite available and popular. Only few could spend an equivalent of their yearly income, or even an income from even several years, on a set of binoculars. If you earned typically 10-20 USD a month, a device costing several hundred dollars was definitely outside your financial reach. If you lived behind the Iron Curtain during the Cold War you could only dream about binoculars produced by such companies as Leitz, Zeiss Oberkochen, Nikon or Swarovski. In the Eastern Block, however, you can talk about a phenomenon of those instruments as they were wildly popular. Perhaps, in the eyes of people from Western Europe or the United States of America, they didn’t produce the best pairs of binoculars but still their price/quality ratio was excellent. Their factory was situated in Jena (an then in Eisfeld not far away from that city).
CARL ZEISS JENA BINOCULARS 7X50 SERIES
Carl Zeiss Jena Deltrintem 8x30 - 1920-1990In our series of articles concerning legendary binoculars the products of the Eastern Germany Zeiss had a place practically guaranteed. Legendary binoculars - Carl Zeiss Jena Deltrintem 8x30 1. The author (a former member of the Zeiss US staff specializing in microscopes) compares two microscopes that came out as new models from both Carl Zeiss Oberkochen and VEB Carl Zeiss Jena in the years immediately after the war. Carl Zeiss Binoculars Published in Zeiss Historica Journal Author: John Schilling See Pages 2 -4.
CARL ZEISS JENA BINOCULARS 7X50 SERIAL NUMBERS
I looked up the serial numbers with corresponding dates on google, but I couldn't find my serial number. Carl Zeiss Binoculars date + serial number? Hi everyone, I have a pair of Carl Zeiss Binoculars and I was wondering if they were real or not.
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