Close-up control method and apparatus for variable focal length

Details Close-up control method and apparatus for variable focal length Close-up control method and apparatus for variable focal length

1991-05-02

1992-12-08

Gellner, Michael L.

35419512, G03B 1300

Patent

active

051702010

ABSTRACT:
A variable focal length camera has a lens barrel movable parallel to the optical axis of its taking lens system so as to change over the focal length of the taking lens system at least between a standard photography position and a telephoto position. When the subject distance is nearer than the nearest focusable distance for standard photography or for telephotography, the lens barrel is automatically moved into a first close-up position if the lens barrel has been in the standard photography position, whereas the lens barrel is moved into a second close-up position if the lens barrel has been in the telephoto position.

REFERENCES:
patent: 4951075 (1990-08-01), Tokumaru et al.

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