JPS55115027A - Lens interchange type ttl automatic exposure camera - Google Patents

Lens interchange type ttl automatic exposure camera

Info

Publication number
JPS55115027A
JPS55115027A JP2302579A JP2302579A JPS55115027A JP S55115027 A JPS55115027 A JP S55115027A JP 2302579 A JP2302579 A JP 2302579A JP 2302579 A JP2302579 A JP 2302579A JP S55115027 A JPS55115027 A JP S55115027A
Authority
JP
Japan
Prior art keywords
aperture
lens
blade
aperture blade
interchangeable lens
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.)
Pending
Application number
JP2302579A
Other languages
Japanese (ja)
Inventor
Tooru Karigawa
Kunio Mita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP2302579A priority Critical patent/JPS55115027A/en
Publication of JPS55115027A publication Critical patent/JPS55115027A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To achieve the simplification of construction by using a program shutter and an interchangeable lens.
CONSTITUTION: The interchangeable lens 10 including the behind system shutter blade/aperture blade 7 connected to an exposure control circuit which determines exposure time and aperture diameter based on the photometric value having been stored therein and the lens-side mount and photographing lens 9 mounted to and dismounted from the body side mount 8 is disposed to the camera body 1. As a result of this, when release operation is done, the light passed through the photographing lens 9, aperture blade 7, mirror 3 and pentagonal prism 5 enters a photoelectric element 11. After it has been measured and stored, the aperture blade 7 closes and the mirror 3 rises, thence the aperture blade 7 performs exposure operation based on the photometric value having been measured. Hence, the need for full aperture value correction mechanism, aperture interlocking mechanism and aperture operation mechanism is eliminated and the aperture blade becomes unnecessary for the interchangeable lens 10 as well, thus the intended object is achieved.
COPYRIGHT: (C)1980,JPO&Japio
JP2302579A 1979-02-28 1979-02-28 Lens interchange type ttl automatic exposure camera Pending JPS55115027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2302579A JPS55115027A (en) 1979-02-28 1979-02-28 Lens interchange type ttl automatic exposure camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2302579A JPS55115027A (en) 1979-02-28 1979-02-28 Lens interchange type ttl automatic exposure camera

Publications (1)

Publication Number Publication Date
JPS55115027A true JPS55115027A (en) 1980-09-04

Family

ID=12098933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2302579A Pending JPS55115027A (en) 1979-02-28 1979-02-28 Lens interchange type ttl automatic exposure camera

Country Status (1)

Country Link
JP (1) JPS55115027A (en)

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