JPS5764715A - Telephoto lens - Google Patents

Telephoto lens

Info

Publication number
JPS5764715A
JPS5764715A JP14119080A JP14119080A JPS5764715A JP S5764715 A JPS5764715 A JP S5764715A JP 14119080 A JP14119080 A JP 14119080A JP 14119080 A JP14119080 A JP 14119080A JP S5764715 A JPS5764715 A JP S5764715A
Authority
JP
Japan
Prior art keywords
lens
positive lens
positive
faced
negative
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
JP14119080A
Other languages
Japanese (ja)
Other versions
JPS6110804B2 (en
Inventor
Keiji Ikemori
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP14119080A priority Critical patent/JPS5764715A/en
Priority to US06/308,565 priority patent/US4468099A/en
Publication of JPS5764715A publication Critical patent/JPS5764715A/en
Publication of JPS6110804B2 publication Critical patent/JPS6110804B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To improve various aberrations of lenses by arranging the front group of a telephoto lens in the order of the 1st positive lens, the 2nd positive lens, the 3rd negative lens, and the 4th positive lens from the side of an object and satisfying specific conditional formulas. CONSTITUTION:A telephoto lens is equipped with a converging front groupIand a diverging back group II and the front groupIis composed of the 1st positive lens, the 2nd positive lens whose convex back surface is faced to the image side, the 3rd negative lens whose concave front surface is faced to the object side, and the 4th positive lens whose convex front surface is faced to the object side arranged in order from the object side. A diverging air lens is arranged between the 2nd positive lens and the 3rd negative lens and an air lens is also attached between the 3rd negative lens and the 4th positive lens. In addition, the entitled lens is constituted so as to satisfy conditional formulas (1)-(3) for focal distances f, Abbe's numbers v and intervals D on the optical axis of lenses, and so on.
JP14119080A 1980-10-09 1980-10-09 Telephoto lens Granted JPS5764715A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP14119080A JPS5764715A (en) 1980-10-09 1980-10-09 Telephoto lens
US06/308,565 US4468099A (en) 1980-10-09 1981-10-05 Telephoto objective

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14119080A JPS5764715A (en) 1980-10-09 1980-10-09 Telephoto lens

Publications (2)

Publication Number Publication Date
JPS5764715A true JPS5764715A (en) 1982-04-20
JPS6110804B2 JPS6110804B2 (en) 1986-03-31

Family

ID=15286248

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14119080A Granted JPS5764715A (en) 1980-10-09 1980-10-09 Telephoto lens

Country Status (1)

Country Link
JP (1) JPS5764715A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883892U (en) * 1981-12-03 1983-06-07 三洋電機株式会社 headphone
JPS6028612A (en) * 1983-07-27 1985-02-13 Nippon Kogaku Kk <Nikon> High-aperture ratio telephoto lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883892U (en) * 1981-12-03 1983-06-07 三洋電機株式会社 headphone
JPS6028612A (en) * 1983-07-27 1985-02-13 Nippon Kogaku Kk <Nikon> High-aperture ratio telephoto lens
JPH0412443B2 (en) * 1983-07-27 1992-03-04 Nippon Kogaku Kk

Also Published As

Publication number Publication date
JPS6110804B2 (en) 1986-03-31

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