Television Ektanon

Discussion in '35mm Cameras' started by wenbiao.liang, Jan 6, 2006.

  1. Hi,
    I bought these 3 Television Ektanon lenses, they look very much like
    Ektra Ektars down to the lens mount.

    They are: 50/1.9, 90/3.5 and 135/3.8.

    Anyone know the history and usage of these lenses?


    wenbiao.liang, Jan 6, 2006
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  2. wenbiao.liang

    Tom Guest

    Sounds like what used to be mounted on the front of the old black and white
    RCA television studio cameras. They mounted to a revolving disc that was
    turned from the back of the camera to change the focal length. This was
    before zoom lenses were mounted on the cameras. Do they have a means of
    focusing as it seems to me that the cameras focused internally rather than
    by rotating a focus setting on the lense?
    Tom, Jan 7, 2006
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  3. Thanks Tom,
    Each lens has focusing ring, the 50/1.9 can focus from 1.5ft, 90/3.5
    3.5ft, and 135/3.8 from 4 ft. The 50/1.9 lens even has the DOF scale.

    And each lens can change its iris. Each has from 8 to 14 aperture
    blades forming a perfect circle! And all 3 lenses are coated, and
    according to Kodak's camerosity system, they dated from 1946, 1957 and

    Again, from the appearance they look exactly like those of Ektra

    wenbiao.liang, Jan 9, 2006
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