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  1. L

    Finnish Army binoculars

    Looks like a German 1930’s -WW2 Dienstglas 6x30 (standard infantry binocular) made by at least a dozen different makers including Zeiss, Leitz, Busch, Voigtlander, Swarovski, Hensoldt etc. The binocular was a close copy of the Zeiss commercial model Silvamar 6x30 introduced about 1910. The...
  2. L

    Inside a vintage German "Hanseat" 8x30

    Those prism wedges are just like the ones in the 3 or 4 Hartmann Berninas I’ve had. My guess is that you are correct and the bino was made by Hartmann. Prism wedges like that, though, are not new. Goerz used them on some binoculars before WWI and the Belgian OIP’s had them during the 1950’s...
  3. L

    Hungarian military binoculars 6*30

    It almost surely was made by Magyar Optikai Müvek (Hungarian Optical Works) usually known as MOM which had a long history and made among other things respectable quality military optics as well as civilian model cameras: Once a world-famous factory in Budapest, now a hardly known company - The...
  4. L

    How many types of Porro prisms?

    As far as I know Zeiss, Ross and Barr & Stroud were the only manufacturers ever to cement a field lens to a Porro II prism in order to reduce the number of air/glass surfaces thereby increasing light transmission and reducing stray light. The Zeiss examples were mostly 7x50’s and marked H for...
  5. L

    How many types of Porro prisms?

    The real difference in Porro I and Porro II prism systems is the geometries of their light paths and not whether the prisms are cemented or not. Most but not all Porro II arrangements have cemented prisms but there are some examples of air spaced Porro II arrangements, and most but not all Porro...
  6. L

    Which binoculars fall over?

    Many of the early non-stereoscopic models with closely spaced objectives (Zeiss’ patent did not expire until 1908 and some companies continued to make them well after that) are not very stable when placed upright. This is why Huet and some of the other early French makers put little knobs...
  7. L

    When Were Dielectric Coatings for Roof Prism Binoculars Introduced?

    I didn’t know that that phase correction coating (“P“ coating) introduced by West German Zeiss in 1988 was a dielectric one. This is interesting, and I have learned something. So, yes it is clear that the first dielectric coating used in roof prism binoculars was the Zeiss P coating to correct...
  8. L

    When Were Dielectric Coatings for Roof Prism Binoculars Introduced?

    You are referencing anti-reflective coatings which are different than dielectric coatings. Anti-reflective coatings are to reduce light reflection and increase light transmission through air-glass optical surfaces. Dielectric coatings are to increase total internal reflection in prisms where...
  9. L

    When Were Dielectric Coatings for Roof Prism Binoculars Introduced?

    Does anybody know when the first dielectric coatings for roof prism binoculars were introduced and which manufacturer introduced them? I believe this has been discussed on this forum before but cannot find the link. I would think John A. would know.
  10. L

    Help Identifying Galilean Binoculars!

    I believe it’s American made circa 1920’s - ‘30’s. I think by a company in Chicago.
  11. L

    RN binoculars

    I can think of three military roof prism binoculars with graticules - the Canadian ELCAN 7X50, the U.S. Army M24 7x28 and the Zeiss Jena EDF 7x40, but there must be more. But all of those mentioned, however, are IF’s with conventional eyepiece adjustment focusing. I’m not aware of any Steiner...
  12. L

    Vintage Binoculars Help

    The binocular in question is a civilian model and was likely made circa 1919 - earlier 1920’s. Hensoldt did make some Porro I binoculars with widely spaced objectives between about 1900-1905 in violation of the Zeiss patent which would not expire until 1908 (see Seeger blue book pages 378-378)...
  13. L

    Did the US Navy Use Japanese Binoculars Prior to WWII?

    I‘ll bet the binocular was a center focus one too which was almost never the case for WW 2 period binoculars (unless it was a private purchase or one donated by civilians).
  14. L

    Did the US Navy Use Japanese Binoculars Prior to WWII?

    “Looking on IMDB someone said that the US used Japanese binoculars prior to the bombing Pearl Harbor. Is this true?” No, this is absolute nonsense. Prior to Pearl Harbor U.S. forces used mostly U.S. made Bausch & Lomb handheld binoculars together with a small number of naval Zeiss binoculars...
  15. L

    CZ 8x30

    Not all of the Oberkochen Zeiss were marked, “Made in West Germany”. I have some examples which are marked, “Made in Germany”. Why, I don’t know, but it may have been a political statement.
  16. L

    CZ 8x30

    They’re definitely authentic but West German Oberkochen Zeiss, not Zeiss Jena. The company split in 1945. Today’s Zeiss is the West German one. The East German Zeiss Jena ceased operations circa 1990.
  17. L

    Carl Zeiss Deltrintem 8x30 - are these legit?

    Yes, they were made in 1920, an early example. The first ones were made in 1919.
  18. L

    Binocular help

    Zeiss factory records which are usually accurate show that 34068 was a “gasmask” model manufactured 1942-1943 much like this one in my collection: https://www.flickr.com/photos/binocwpg/8555893220/in/photolist-nv5exo-e34bYm-H3PX8H-GekMas
  19. L

    Mystery bino ID?

    Very nice. First one I’ve seen.
  20. L

    Avimo or Rollei 7x42?

    Hmmm, I stand corrected. This could be a Rollei as well as Avimo, alright.
  21. L

    Avimo or Rollei 7x42?

    It’s an Avimo missing the serial number plate which is fairly common.
  22. L

    Lumenised?

    Yes, the objectives are 50 mm and the magnification and field of view specifications seem to be about right.
  23. L

    Lumenised?

    The Lumenised marking is a sales gimmick and nothing else. It does not indicate any sort of actual innovative coatings or optical glass etc. this particular binocular has although it may have origins in the markings of a much higher quality instrument. Quite a few low-budget Japanese binoculars...
  24. L

    Serial numbers and date of manufacture

    See post #’s 9 and 10: https://www.birdforum.net/showthread.php?t=375572 I maintain a small pre -1963 Leitz binocular serial number database and can help with the earlier binos.
  25. L

    Royal Navy current use binoculars?

    Those look a lot like the US Fujinon M22 but I checked mine and there are small differences. So I don’t think so. But what are they?
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