Camera with non-TTL type finder

Details Camera with non-TTL type finder Camera with non-TTL type finder

1992-10-22

1994-01-11

Gellner, Michael L.

354219, 354223, G03B 1320, G03B 1302

Patent

active

052785980

ABSTRACT:
A camera with a non-TTL type finder may avoid a mechanical complexity, may be produced with a gentler standard in dimensional accuracy than conventional cameras of such a type, and may lower consumption of a power battery.
A finder focusing dial is manually rotated together with a cam member to swing an interlocking lever. An end of the interlocking lever moves an objective lens frame back and forth. When it is observed that an image of a target subject becomes focused on a finder focusing screen through a finder eye piece, the rotation of the dial is stopped. A focused state detecting device detects a stop position of an objective lens to supply a detection value to a photo-taking optical system focusing amount determining device to determine an amount of focusing. A drive device drives the photo-taking optical system into an in-focus state in accordance with the focusing amount thus determined.

REFERENCES:
patent: 4268151 (1981-05-01), Kobori et al.
patent: 5083149 (1992-01-01), Kudo et al.

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