![]() ![]() Over the decades we have, and will continue to, on occasion add this or that mention of or illustration of items in our archives and museum collection, this to break up the monotony of text, make corrections (with much gratitude to Dr. ![]() With some of this content dating back to the times when slow dial-up Internet access was the norm, the article was originally text heavy because illustrations were by necessity kept simple and to a minimum. It is produced and hosted as another way of expressing gratitude to those who have helped Company Seven prosper. Preface: going on-line in 1994 this is among the first and earliest on line articles about Carl Zeiss, and is written entirely with a simple text editor. Sports Optics Telescopes Warranty / Service & RepairĬarl Zeiss - A History Of A Most Respected Name In Optics The prism covers are made of brass and they are attached to the binocular with the help of three screws.Company Seven | Carl Zeiss Companies HistoryĬ-7 Home Page C-7 News Consignment Library Products & Services Product Lines Order Search C7.comĭistribution Zeiss Index History News Notes & Interesting Articles Pricing Products What the number “12485” means, is still unknown, perhaps it is the military acceptance number. “Dienstglas” is a military (service) glass. The inscription is made in block letters with the help of silver alloy. Dienstglas Nr.12485 U.F.” on the right prism cover. There are inscriptions “Carl Zeiss Jenna” on the left prism cover. The eyepieces’ base diameter is equal to 20.5 mm. The upper prism cover width is equal to 45.5 mm the binocular’s height from the lens barrel lower cut to the upper prism cover is equal to 69.6 mm. The eyepieces have a diopter scale for sharpness adjustment. The eyepieces’ grooves (the knurling) are located perpendicularly to each other (the “perpendicular” knurling). The interpupillary distances scale is indicated on the upper hinge disk. The binocular’s “military" application is proved by the large diameter of the central hinge clamp (lock). The presented binocular belongs to the 1st version (with double-ring type lens frames). This device was not produced as massively as the D.F.6x (D.F.6x24), and today two modifications of this binocular are known among collectors:ġst version: 6x24 - the one with double-ring type lens frames (starting from 1910) Ģnd version: 6x24 the one with rounded objective covers (starting from 1913) 808), this batch of binoculars is marked as the unknown model - "?". Obviously, Carl Zeiss started producing the D.F.03. binoculars back in 1910. Zeiss-Feldstecher, Handfernglaser von 1894-1919, Modelle-Merkmale-Mythos, p. According to Hans Seeger (see Hans T.Seeger. CARL ZEISS JENA BINOCULARS D.F. 6X SERIAL NUMBERDienstglas model in March 1911, but the device we are considering has serial number “205905”, which was produced as a 600 pieces batch in the second half of 1910 (numbers 205601-206200). The second point is the following: according to the letter addressed to Munich (see above), they started to produce the Carl Zeiss D.F.03. The question arises: what is the reason of producing the same models under different designations? Perhaps, Carl Zeiss decided to keep up with his competitors that way. Dienstglas model was a complete analogue of the already popular Carl Zeiss D.F.6x model. The first one is the following: the Carl Zeiss D.F.03. However, there are two interesting facts. The device was intended primarily for junior officers (there is an inscription“U.F.” on the right prismatic cover (non-commissioned officer)). The binocular became very popular and, apparently, that was the reason why Carl Zeiss announced the start of the same model production at his factory in March 1911, which was mentioned in a letter to the Bavarian Royal War Office (Munich). In 1908, one of Carl Zeiss main competitors in the military optics market, the German company C.P.Goerz, released another version of 6x24 binocular marked “D.F.03” (the model had been produced since 1903). In addition, the prisms inside the binocular were no longer pressed by prismatic covers, but they were fixed with special flat springs, which increased the device reliability significantly. Optical characteristics were significantly improved for the new devices (field of view and the lenses diameter were increased, while optical aberrations were reduced), and the devices’ construction was also changed: the central hinge and the “ears” for the neck strap were not attached to the binocular with the help of screws any more - they became the whole part with it instaed, an eccentric lens alignment system appeared and the design of its frame changed, prism covers spanned the binocular body and they were lubricated with a special compound at the joints with the purpose of tightness improvement. In 1906-1907, Carl Zeiss radically changed the construction and the design of his binoculars (both “civilian” and military ones). ![]()
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