JPS5665104A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS5665104A
JPS5665104A JP14167879A JP14167879A JPS5665104A JP S5665104 A JPS5665104 A JP S5665104A JP 14167879 A JP14167879 A JP 14167879A JP 14167879 A JP14167879 A JP 14167879A JP S5665104 A JPS5665104 A JP S5665104A
Authority
JP
Japan
Prior art keywords
lens
close
extent
photographing
zoom 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.)
Granted
Application number
JP14167879A
Other languages
Japanese (ja)
Other versions
JPH0246925B2 (en
Inventor
Hideho Yonetani
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.)
Tamron Co Ltd
Original Assignee
Tamron 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 Tamron Co Ltd filed Critical Tamron Co Ltd
Priority to JP14167879A priority Critical patent/JPS5665104A/en
Publication of JPS5665104A publication Critical patent/JPS5665104A/en
Publication of JPH0246925B2 publication Critical patent/JPH0246925B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Lens Barrels (AREA)
  • Lenses (AREA)

Abstract

PURPOSE: To ensure an ideal extent of extension for the purpose of close-up photographing in all states, in zooming of a zoom lens, by changing the extent of lens extention at the time of close-distance photographing.
CONSTITUTION: Out of the moving loci of the front group lens 1 and rear group lens 2 of a 2-group zoom lens, A is the state of telephoto, B intermediate and C a wide angle. The close-up photographing of this zoom lens is carried out by extending said lens 1 to the subject side, wherein when the extent of movement of the front group lens from the state of A of, for example, the extent (l) of extention at which the close-up photographing free from vignetting of lens may be made up to a desired zooming state is defined as (m), (l+m) is kept constant. Namely, the extension threshold of the front group lens for the purpose of the close-up photography shown by alternate long and two short dashes lines becomes constant with respect to the stationary part of the lens barrel. In concrete, the zoom lens consists of a cam barrel 6 which is rotated by the zooming operation, and a longitudinal groove barrel integral with the lens barrel, and the grooves 6a, 8a carry the front group lens and the grooves 6b, 8b the rear group lens.
COPYRIGHT: (C)1981,JPO&Japio
JP14167879A 1979-11-01 1979-11-01 Zoom lens Granted JPS5665104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14167879A JPS5665104A (en) 1979-11-01 1979-11-01 Zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14167879A JPS5665104A (en) 1979-11-01 1979-11-01 Zoom lens

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP15106983A Division JPS5957208A (en) 1983-08-19 1983-08-19 Zoom lens
JP18129684A Division JPS60114813A (en) 1984-08-30 1984-08-30 Close photographing-enabled zoom lens

Publications (2)

Publication Number Publication Date
JPS5665104A true JPS5665104A (en) 1981-06-02
JPH0246925B2 JPH0246925B2 (en) 1990-10-17

Family

ID=15297650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14167879A Granted JPS5665104A (en) 1979-11-01 1979-11-01 Zoom lens

Country Status (1)

Country Link
JP (1) JPS5665104A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6230222U (en) * 1985-08-09 1987-02-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6230222U (en) * 1985-08-09 1987-02-23

Also Published As

Publication number Publication date
JPH0246925B2 (en) 1990-10-17

Similar Documents

Publication Publication Date Title
EP0401862A3 (en) Zoom lens of rear focus type
MY126881A (en) Zoom lens and image taking apparatus using the same
JPS5256947A (en) Zoom lens with its close range being short
JPS55133006A (en) Close-up photographing changeover device of zoom lens barrel
JPS5567716A (en) Lens structural body
JPS557764A (en) Zoom lens device capable of macro photography
JPS5740211A (en) Construction of zoom lens capable of extreme proximity photographing
JPS559550A (en) Zoom lens system
JPS52113753A (en) Zoom lens capable of simply changing variable focal length range
JPS55134809A (en) Lens barrel of closeup photographable zoom lens
JPS55143517A (en) Inverse telephoto type wide angle photographic lens
JPS53142251A (en) Optical compensation type zoom lens
JPS5735821A (en) Reverse telephoto lens
JPS5266445A (en) Zoom lens
JPS5244636A (en) Zoom lens barrel with a macro shooting mechanism
EP0780714A3 (en) Lens barrel and camera provided with a lens barrel
JPS5665104A (en) Zoom lens
JPS5651709A (en) Reverse telephoto type wide angle lens
JPS5776506A (en) Zoom lens barrel
JPS5417042A (en) Wide-angle zoom lens
JPS5683708A (en) Zoom lens which permits close-up photography
JPS5559410A (en) Zoom lens barrel which permits operation in two kinds of directions
JPS5529821A (en) Zoom lens
JPS5262433A (en) Reshaping zoom lens telephoto
JPS5621106A (en) Lens barrel of zoom lens having close-up photographing mechanism