JPS63273841A - Automatic focusing device for camera - Google Patents

Automatic focusing device for camera

Info

Publication number
JPS63273841A
JPS63273841A JP10621087A JP10621087A JPS63273841A JP S63273841 A JPS63273841 A JP S63273841A JP 10621087 A JP10621087 A JP 10621087A JP 10621087 A JP10621087 A JP 10621087A JP S63273841 A JPS63273841 A JP S63273841A
Authority
JP
Japan
Prior art keywords
macro
focusing
variable magnification
area
optical system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10621087A
Other versions
JP2628303B2 (en
Inventor
Takayuki Hatase
Yoshimi Ono
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP62106210A priority Critical patent/JP2628303B2/en
Priority claimed from US07/169,470 external-priority patent/US4825237A/en
Publication of JPS63273841A publication Critical patent/JPS63273841A/en
Application granted granted Critical
Publication of JP2628303B2 publication Critical patent/JP2628303B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To smoothly set the lens groups of variable magnification optical system in a specified relation in the midst of actuation of macro switching actions without mutual interfering actions by executing the unification of directions for focusing in a variable magnification focusing area and a macro focusing area and the common use of data obtained by measuring distance.
CONSTITUTION: When macro information showing that macro photographing is possible is displayed and the operator of a camera starts the operation of switching a variable magnification optical system 2 from the variable magnification area to the macro area, a titled device is constituted in order that the variable magnification optical system 2 is switched to the macro area after driving a focus lens group 3 to the ∞ position of the variable magnification focusing area first. Therefore, the driving directions for focusing are unified in the variable magnification focusing area and the macro focusing area and the movement of focusing in the variable focusing area and the movement of focusing in the macro focusing area can be executed by a common focus driving part 5. Thus, the respective lens groups constituting the variable magnification optical system can be smoothly moved without interference in the case of macro switching actions.
COPYRIGHT: (C)1988,JPO&Japio
JP62106210A 1987-05-01 1987-05-01 Camera autofocus device Expired - Lifetime JP2628303B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62106210A JP2628303B2 (en) 1987-05-01 1987-05-01 Camera autofocus device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62106210A JP2628303B2 (en) 1987-05-01 1987-05-01 Camera autofocus device
US07/169,470 US4825237A (en) 1987-03-18 1988-03-17 Automatic focusing device for use in a camera

Publications (2)

Publication Number Publication Date
JPS63273841A true JPS63273841A (en) 1988-11-10
JP2628303B2 JP2628303B2 (en) 1997-07-09

Family

ID=14427790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62106210A Expired - Lifetime JP2628303B2 (en) 1987-05-01 1987-05-01 Camera autofocus device

Country Status (1)

Country Link
JP (1) JP2628303B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02287309A (en) * 1989-04-27 1990-11-27 Matsushita Electric Ind Co Ltd Video camera

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63149629A (en) * 1986-12-15 1988-06-22 Fuji Photo Film Co Ltd Focusing distance switching type camera

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63149629A (en) * 1986-12-15 1988-06-22 Fuji Photo Film Co Ltd Focusing distance switching type camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02287309A (en) * 1989-04-27 1990-11-27 Matsushita Electric Ind Co Ltd Video camera

Also Published As

Publication number Publication date
JP2628303B2 (en) 1997-07-09

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