Lens system

Details Lens system Lens system

2005-02-08

2005-02-08

Schwartz, Jordan M (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C396S137000, C348S345000

Reexamination Certificate

active

06853502

ABSTRACT:
In a lens system, an auto-focus (AF) mode switch for selecting an AF mode is provided at a focus demand and, for example, a continuous AF mode is selected by the AF mode switch. Then, a CPU switches the continuous AF to a manual focus (MF) when an operation of the focus demand is executed and switches the MF to the continuous AF when an AF start switch provided at the focus demand is turned ON. Thus, when an operation of the MF is executed during focus adjustment by the AF, the focus adjustment by the AF is switched to focus adjustment by the MF, and thereafter, the focus adjustment by the MF is never switched to the focus adjustment by the AF unless the AF start switch is turned ON.

REFERENCES:
patent: 4609944 (1986-09-01), Nakada et al.
patent: 4796045 (1989-01-01), Hamanishi et al.
patent: 5315340 (1994-05-01), Hirasawa
patent: 5448328 (1995-09-01), Suzuki et al.
patent: 5572373 (1996-11-01), Imanari et al.
patent: 62-187829 (1987-08-01), None
patent: 8-29665 (1996-02-01), None

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