Camera having a zoom lens unit

Details Camera having a zoom lens unit Camera having a zoom lens unit

1989-06-26

1990-06-19

Adams, Russell E.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

354402, 3541951, 358227, G03B 300

Patent

active

049357638

ABSTRACT:
When a variator lens is driven to effect zooming, focal length information of a zoom lens unit, a zooming direction and a defocus amount are detector. Integration in CCD for focus detection is regulated in a short time during zooming and a cycle of focus detection is set to a predetermined period. A moving speed of a compensator lens is controlled based on detected information. A moving range of the variator lens is divided into zones and a basic moving speed of the compensator lens is set for each zone. When the variator lens is driven and information obtained by focus detection or a zooming condition corresponds to a specified condition, the compensator lens is moved at a basic speed corresponding to the zone where the variator lens exists or at a moving speed of the compensator lens applied till then. Focus detection areas automatically changed dependent on a situation of an object are forbidden to be changed during zooming. In addition, a focus detection are indicating mark displayed in a finder of the camera is fixed and unchanged during zooming irrespective of actual change of the focus detection area.

REFERENCES:
patent: 3972056 (1976-07-01), Tsujimoto et al.
patent: 4043642 (1977-08-01), Hirose et al.
patent: 4183639 (1980-01-01), Suwa
patent: 4541695 (1985-09-01), Wainwright et al.
patent: 4572624 (1986-04-01), Yamamoto et al.
patent: 4589031 (1986-05-01), Tsuji
patent: 4618235 (1986-10-01), Ishida et al.
patent: 4697891 (1987-10-01), Kawai
patent: 4705380 (1987-11-01), Yamamoto et al.
patent: 4728980 (1988-03-01), Nakamura et al.
patent: 4735494 (1988-04-01), Makino et al.
patent: 4748509 (1988-05-01), Otake et al.
patent: 4766302 (1988-08-01), Ishida et al.

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