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?

    Thanks!

    Wenbiao
     
    wenbiao.liang, Jan 6, 2006
    #1
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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
    #2
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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
    1960.

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

    Thanks
     
    wenbiao.liang, Jan 9, 2006
    #3
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