EP0818697A2
Expired / Lapsed
EP
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Focus detecting device
Assignee: Canon Inc
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Filing: 1997-07-09
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Granted: —
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Expires: 2017-07-09
Abstract
Abstract A focus detecting device which is of the kind having a plurality of focus detecting areas and detecting focus by selecting a desired area from among the focus detecting areas is arranged such that the desired focus detecting area is selected by operating an operation member to shift the selecting position from one area to another one by one in a first mode and at intervals of a plurality of areas in a second mode, so that the focus detecting area can be speedily selected. <IMAGE>
Inventors
- 👤 Shinichi Hagiwara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:16
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/34; G02B7/346
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
A focus detecting device having a plurality of
focus detecting areas and detecting a focusing state of
each of the focus detecting areas, comprising: an operation member; and a designation circuit for designating a desired
area from among the focus detecting areas according to an
operation of said operation member, said designation
circuit including a shifting circuit having a first mode
in which an amount of shift from one of the focus
detecting areas to another area in response to every unit
operation of said operation member is set to a first
value and a second mode in which said amount of shift is
set to a second value which is greater than said first
value.
Claim 2
Dependent Claim
22 words
A device according to claim 1, further comprising
a selection circuit for selecting one of said first mode
and said second mode.
Claim 3
Dependent Claim
21 words
A device according to claim 1, wherein said
plurality of focus detecting areas are disposed in
positions separated from each other.
Claim 4
Dependent Claim
50 words
A device according to claim 2, wherein said
selection circuit selects said first mode when said
operation member is operated while a release operation
member is in a state of being operated, and selects said
second mode when said operation member is operated while
said release member is not operated.
Claim 5
Dependent Claim
149 words
A focus detecting device having a plurality of
focus detecting areas and detecting a focusing state of
each of the focus detecting areas, comprising: a first operation member; a second operation member; and a designation circuit for designating a desired
area from among the focus detecting areas according to an
operation of said first operation member or said second
operation member, said designation circuit including a
shifting circuit having a first mode in which an amount
of shift from one of the focus detecting areas to another
area in response to every unit operation of said first
operation member is set to a first value and a second
mode in which an amount of shift from one of the focus
detecting areas to another area in response to every unit
operation of said second operation member is set to a
second value which is greater than said first value.
Claim 6
Dependent Claim
22 words
A device according to claim 5, further comprising
a selection circuit for selecting one of said first mode
and said second mode.
Claim 7
Dependent Claim
28 words
A device according to claim 6, further comprising
a third operation member for causing said selection circuit
to select one of said first mode and said second mode.
Claim 8
Dependent Claim
60 words
A device according to claim 1, wherein said
plurality of focus detecting areas are two-dimensionally
arrayed in vertical and horizontal directions, and
wherein said designation circuit is provided with a setting
member for setting whether the shift from one of the
focus detecting areas to another area is to be made in the
vertical direction or in the horizontal direction.
References Cited (Backward Citations)
No citation records indexed.
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