Focus detecting device

Details Focus detecting device Focus detecting device

1987-12-23

1989-04-25

Perkey, W. B.

G03B 300

Patent

active

048252387

ABSTRACT:
A focus detecting device in which the in-focus range, within which the result of focus detection is regarded as being in the in-focus state, is made greater than usual when the photo-taking lens is in the infinity movable limit position. The in-focus range is set to a greater value when the lens is in the infinity movable limit position and is detected as being in focus as a result of the earlier focus detection. Thus, it is made easy to effect the in-focus state when the lens is in the limit position.

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patent: 4687915 (1987-08-01), Sakai et al.
patent: 4733262 (1988-03-01), Taniguchi et al.

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