Optical protractor
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  1. #1
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    Default Optical protractor

    Hello,

    I just aquired a vintage optical protractor in mint condition for a killer price.

    Built in the 80s or early 90s.

    0-360 degrees measurement range with 5' resolution.

    Besides the obvious, that can measure angles, how usefull is such a tool compared to let's say an electronic protractor?

    Thank you



    Sent from my SM-A520F using Tapatalk

  2. #2
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    Never have to worry about EMP or battery problems!

  3. #3
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    Super nice..could have used that in sharpening and making cutting tools.
    Last edited by michiganbuck; 10-15-2019 at 08:09 AM.

  4. #4
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    In the mean time I found some more info related to this device.

    It is a copy of the Carl Zeiss Jena device.

    I have no clue if it is a clone or a licensed copy, but the build quality is super nice.

    I also found a scanned copy of the original user manual.


    Sent from my SM-A520F using Tapatalk

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    I've got one of these made by Helios. Nice tool. It still has the original inspection sheet showing that the errors in the dividing circle are 10 seconds of arc. The instruction sheet claims that even though the markings are 5 arcminutes one should be able to get 1 arcminute accuracy in reading or setting the scale.

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  7. #6
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    Quote Originally Posted by DLF View Post
    In the mean time I found some more info related to this device.

    It is a copy of the Carl Zeiss Jena device.

    I have no clue if it is a clone or a licensed copy, but the build quality is super nice.

    I also found a scanned copy of the original user manual.


    Sent from my SM-A520F using Tapatalk
    Carl Zeiss Jena found itself in "East" Germany after the war. And when reunification happened 1989/1990 Carl Zeiss Oberkochen (West Germany) managed to support Carl Zeiss Jena with additional funding. CZ-Jena did manage to trade optical products (for example related to photogrammetry) to the West etc.

    What you have does not look like the CZ-Jena device.

    Could it be a Russian/ East German/ Hungarian etc. Universal Angle measurer … (I.e. not a direct knock off) but maybe both of them have a common ancestor ?

  8. #7
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    Quote Originally Posted by cameraman View Post
    Carl Zeiss Jena found itself in "East" Germany after the war. And when reunification happened 1989/1990 Carl Zeiss Oberkochen (West Germany) managed to support Carl Zeiss Jena with additional funding. CZ-Jena did manage to trade optical products (for example related to photogrammetry) to the West etc.

    What you have does not look like the CZ-Jena device.

    Could it be a Russian/ East German/ Hungarian etc. Universal Angle measurer … (I.e. not a direct knock off) but maybe both of them have a common ancestor ?
    Thenk you for the info.

    Like mentioned in the original post, it is a copy. And you are right, it was made in the eastern part of the world, in Romania by a company called Mecanica Fina.

    And it looks and functions just like the CZ-Jena device. I figured this ouy after going through the manual.

    I just wanted yo know more about the origins of the device.

    BTW: I checked it against my precision ground cylinder block. Measures 90.00 degrees spot-on.

    Sent from my SM-A520F using Tapatalk

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