Carl Zeiss Jena Deltrintem 8x30
*Carl Zeiss Jena Deltrintem 8x30 Binoculars Serial Numbers Download
*Carl Zeiss Jena Deltrintem 8x30 Binoculars Serial Numbers Chart
*Carl Zeiss Jena Deltrintem 8x30 Binoculars Serial Numbers For Sale 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.
Carl Zeiss Jena Deltrintem 8X30 Binoculars Serial Numbers 3,8/5 550 reviews You likely have a set built between 1919 and 1930. If you go to this site ( ) and scroll down (or search) to areas with Zeiss Binoculars, there are a number of files that have the information on runs. Carl Zeiss Jena Deltrintem 8x30 Binoculars Serial Numbers. These binocs are a great buy when in good condition. They still are excellent optics. Note that there was a thriving business making 7x50 replicas, but nobody built fake Zeiss 8x30s, to my knowledge Hi, Just got a pair of Carl Zeiss Jena 6X30 with serial number 1484950.
A great pair of vintage binoculars, still good for use or a collector. These are Carl Zeiss Jena binoculars. With 8X32B zoom. In black with focal mechanisms that still work. The visibility of the binoculars is still generally good, though sometimes a bit blurry and the lenses are very dusty. They were manufactured in the East German Zeiss Jena plant. Operacion traviata pdf 8X30 Deltrintem and 8X30 Jenoptem were psx2 bios in performance and specs, the only difference being manufacturing techniques automated production carl zeiss jenoptem serial number the Jenoptems used, leaving jejoptem Jenoptem as less expensive, but not. Carl Zeiss Binocular Serial Numbers. Vintage Carl Zeiss Jena Deltrentis 8x30 binoculars with genuine vintage Carl Zeiss leather case. I believe these are 1920s/1930s but do not know the exact year. In very good condition for age. Optics very good with very light dust internally. Some light cleaning marks to external lenses but still very good.
These are classic Porro prism instruments with achromatic objectives. At first these binoculars contained 4 lens-elements ocular without any antireflection coatings. During the WWII one layer of magnesium fluoride coating was put on air-to-glass surfaces. 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. In 1978 the producer started to use new multilayer coatings with the characteristic orange-purple hue.
Around 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. Its production, already under the Doctor brand name, ceased only ca.1995.
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. You can find a narrow strap and a small soft case included with the binoculars. Manufacturer:Carl Zeiss Jenaweb siteDistribution / Sales:komis, giełda, aukcjeweb siteMagnificationLens diameterAngular field of viewPrismsEye reliefWeightPrice830 150/1000(8.5o)Bak-4/Porro? mm520 g400 PLNReal front lens diameter Left: 30.05+/- 0.05 mm Right: 30.05+/- 0.05 mm 8 / 8.0 pktReal magnification 8.02+/- 0.15x 3/3.0Transmission 92.2+/- 1.5% 20/25.0Chromatic aberrationGood to average correction in the centre, not very high at the edge. 6.5/10.0AstigmatismSlight.6.3/10.0DistortionThe distance of the first curved line from the field centre compared to the field of view radius: 31% ± 3%3/10.0ComaQuite significant, especially at the very edge. 4.8/10.0Blurring at the edge of the FOVThe blur occurs in the distance of 64% ± 5% from the field of view centre.1.5/10.0Darkening at the edge the FOVBetween medium and low.3.8/5.0Whiteness of the imageDistinct yellow. The transmission curve peaks sharply near 550 nm.1/5.0CollimationPerfect.5/5.0Internal reflectionsLeft:Right: A lot of reflections from the area near prisms.2.3/5.0HousingA classic Porro set of binoculars with an ocular bridge. Comfortable to hold. Eyecups a bit too small and not regulated. The binoculars is neither waterproof nor nitrogen-filled. Light and handy.7/8.0FocusingSmall central wheel (full turn of 400 degrees). It moves smoothly and evenly. You can’t defocus by applying pressure on eyepieces. The bridge has a slight lateral “play”. Individual focusing on the right eyepiece. It moves the outer lens.4.1/5.0TripodLack of tripod exit. 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.1.5/3.0Interpupilary distance from 47.3 to 76mm 6/6.0Closest focusing distance1.9 m1.5/2.0Eyepieces FOVApparent field of view of 67.5 deg (according to simple formula) and 61.1 deg (according to tangent formula).15/20.0Field of viewMeasured by us amounted to 8.42 ± 0.03 degrees and was a bit smaller than in the specifications. A very big field of view for this parameters’ class.7.5/8.0Quality of the interior of the barrelsInner tube black, corrugated and slightly shiny inside. Grey bottom. You can see neither glue nor screws. Isolated specks of dust on prisms.3.2/5.0VignettingLeft:Right: Slightly truncated pupils. OL: 3.2%, OR: 4.1%3.5/8.0Prisms qualityGood quality BaK-4.8/8.0Antireflection coatingsBluish on eyepieces and prisms. Orange-purple on objective lenses. Medium instensity.4.5/5.0Warranty [years]1 1/6.0Final result67.4%128 / 190 pktEcono result0pkt.SummaryPros:
*classic and solid casing,
*very wide field of view,
*high transmission level in the middle of the visible spectrum,
*slight astigmatism,
*chromatic aberration quite well-corrected,
*eyepieces can be set very wide apart,
*good quality of BaK-4 prisms. Cons:
*significant blur at the edge of the field of view,
*distinctly yellow image,
*noticeable distortion,
*a lot of flares from the areas near prisms,
*small eye relief,
*slightly truncated pupils.
Our 8x32 class binoculars test couldn’t lack classic Zeiss devices from Jena. There were so many of them produced over the years that you can still find many well-cared-for specimens on the secondary market, available at a very affordable price - from around 50 to 150 Euro. While testing this pair of binoculars we were stimulated not only by sheer curiosity how an instrument produced 20 or 30 years ago compares with contemporary products but also by deep belief that it can outperform many devices currently produced in China. Time for a reality check.
Let’s start with evident advantages. The tested set of binoculars is 25-year-old. Despite some abrasions on the casing, being a result of ordinary wear and tear and more specifically frequent taking off and putting into the case, it is in a very good shape – we found no serious scratches or dents. Its optics is even in a better shape than the casing. The lenses are clean and flawless, without any mould inside. There are some specks of dust on the prisms but it is quite understandable taking into account the age of the device. Its condition places the workmanship quality in a very favourable light – after next twenty five years the Deltrintem 8x30, tested here, will look still the same, providing it is used in a similar way of course. I doubt whether any contemporary product made in China and bought for a sum not exceeding 250 Euro is able to survive equally well even a much shorter period of time.
The next advantage is the field of view. Once a huge field of view counted a lot and the Deltrintem boasts such a feature. It is almost by half a degree wider than the widest field of view found in contemporary competitors, even those very reputable.
The set of binoculars corrects astigmatism and chromatic aberration quite well. You can’t complain about the coma level too much either. The parameters, given by the producer, are followed with perfect exactitude – the objective lens’s diameter and magnification are in accordance with the numbers in documentation.
The classic Porro prism construction, not many optical elements and multilayer coatings made the transmission in the middle of the visual spectrum rather high, amounting to 92-93%. This result is very good – in fact other cheaper roof-prism instruments can only dream of it.
The colour fidelity can be a problem, though. In the 80s of 20th century the coatings were already multi-layered but still optimized only for the centre of visual spectrum. It had the effect which can be witnessed here - the transmission for yellow light is high but for blue and red it becomes even by 20% worse. As a result the image is seriously yellow.
As we’ve already passed to disadvantages, we must also mention the other negative points. The edge of the field of view, which is not sharp enough, and noticeable distortion can be certainly counted among them. What’s more, the usage of such wide-angle eyepieces made the exit pupils distinctly truncated.
Nowadays, most of binoculars, even those cheaper ones are waterproof and nitrogen-filled. In the case of the Deltrintem 8x30 we can’t count on that.
To sum up despite the passage of time the Deltrintem 8x30 seems to be still a very interesting option. Although you can get a bargain, usually you must pay for this device about 80-100 Euro, sometimes even 130 Euro. For such an amount of money you would be hard-pressed to find a really good 8x30 or 8x32 alternative so the Jena product is still attractive.
The risk, involved in purchasing anything on the second hand market is an issue, though. It happens very often that a set of binoculars touted by its seller as “in perfect condition” can be hardly described as such. This bad practice is notoriously common. As I needed to buy a lot of items on Allegro and e-bay to perform this test among other things, I could cite plenty of interesting cases from my own experience – I might be even tempted to write a separate article about it. Let me just state here that sometimes I drove to a seller just to have a look at a Jena pair of binoculars which had been touted as perfect only to find out that it was in appalling state – completely uncolimated or with huge amount of mould inside. Fakes are also a problem and the ingenuity people use in this area is really unlimited. Some cases I have seen decidedly deserve a place in the article I mentioned above.
Anyway if you decide to buy something on the second hand market you must give it your full attention – otherwise you might end up sending your bargain purchase to an optics specialists and paying extra money for repair or cleaning. I do recommend buying only from sources you can rely on and the direct contact is always the best.
Eine deutsche Version gibt eshier.by Holger Merlitz
(Catalogue kindly provided by Gary Hawkins)Introduction
This catalogue was distributed by binoculars dealers in UK,probably around 1985, because it contains the then newly introducedPorro prism models 12x50 Dodecarem and 8x50 Octarem,later renamed 'Nobilem'. While these represented the rather expensive high end line of the Zeiss Jena collection, the classicalline, containing the 8x30 Deltrintem, 7x50 Binoctem and 10x50 Dekaremwere Jena's actual working horses of that time. They were of very decent quality and, produced in the DDR, took profit of the favorablecurrency exchange rate to be available for a highly competitiveprice. During these golden times, Carl Zeiss Jena was able to produce 200,000 binoculars per year!
What is special about this brochure (and in contrast to the German version)is the fact that it offeredtwo representatives of this classical line, the Deltrintem - Binoctem - Dekarem, as well as the corresponding Jenoptem models.Apparently, these were identical in construction, and any dealerfound himself in the delicate situation to explain to the customer the factthat a 7x50 Jenoptem was cheaper than a 7x50 Binoctem, withoutbeing able to point out any particular difference in performance.In fact, the catalogue avoids mentioning details regarding this paradoxon, just explaining that 'The only difference is in the manufacturing techniques utilized in the two models. This does, of course, mean that the Zeiss 7x50 Jenoptem reallydoes represent outstanding value' (page 6). This soundslike: 'Well, we have got twice the same binocular for you. Oneof them is produced more efficiently than the other and istherefore cheaper. Its your choice...'.
In what follows I shall give a few remarks on whatever else I found interesting in this brochure. Additional remarks:
Page 3: This introduction appears quite informative and reasonable.Instead of the hype and exaggeration about the unbelievable performanceof their products, as often found nowadays in advertising brochures,Zeiss Jena provides a rather sober overview of its production lineand the intended spectra of application.
Page 4: The Jenoptem displays the trademark 'aus JENA', printed onthe left prism housing. After a legal battle with Zeiss (West, Oberkochen),Zeiss Jena was prohibited to use the Zeiss trademark on products exported to certain Western countries, among them the U.S., but,to my knowledge, not including England. This catalogue uses theCarl Zeiss Jena trademark throughout, but strangely doesn't show iton the instrument itself.
Page 6: The plot shows a cross section of the Jenoptem 7x50 with asimple ocular construction of 3 (?) lens elements (the 'plate' facingthe prism seems to indicate the position of a reticle only, as it wasprovided with some of the binoculars), which seems to be correctfor the 7x50, whereas the 10x50 had got more sophisticatedwide-angle oculars.
Page 14: The Dodecarem is touted as 'New', which indicates thatthis brochure was printed around 1985. It shows the same, rathersimple ocular construction of the 7x50 Jenoptem, which is incorrect,since the Dodecarem, like the Octarem, came with 4 lens elements (see also here for a detailed plot of the Octarem published 1985 in the Jenaer Rundschau).
Page 16: They confuse '8x50 Dodecarem', which supports the claim thatthese binoculars were probably newly introduced.
Page 18: This is of course the civilian version of the EDF 7x40 ofthe NVA. It is interesting to note that the catalogue does not mention its military origin. The ocular construction looksidentical to the Notarem's (Page 10), but this seems to beincorrect, as this more detailed plot suggests a 5 element Erfle construction instead. The remark 'Built-in Umbral filters act as protection against strong sunlight'refers to the strong yellow tint of the EDF. In reality this was notproduced by any filter, but the result of special radiation resistantflint-glass types in the oculars; see here (in German language) for a more detailed discussion on that.
Page 20: The Octarem is specified with a field of view of 122m/1000m.However, on Page 17, the same specification is given as 130m/1000m. This confusion has never been sorted out since then.Even nowadays both specifications are found for the Octarem or itssuccessor, the Nobilem. The 8x50 Nobilem which I have tested hasdefinitely got 130m/1000m.
Remark: After the collapse of the DDR, the Zeiss Jena plant wastaken over by Docter Optic. A set of their product leaflets of the early 1990s shows that most of the Zeiss Jena binoculars were still made under the Docter label, some improved versions of them are produced even today. The Catalogue:
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