JPS60140017U

JPS60140017U - zoom lens

Info

Publication number: JPS60140017U
Application number: JP19932684U
Authority: JP
Inventors: 敬二池森; 籾山　喜久雄
Original assignee: キヤノン株式会社
Priority date: 1984-12-27
Filing date: 1984-12-27
Publication date: 1985-09-17

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は光学補正式ズームレンズのレンズ構成の一例に
ついて示す模式図、第２図は光学補正式ズームレンズに
於けるズーミングに際しての像面移動の様子を示すグラ
フ、第３図は従来の単一操作環型光学補正式ズームレン
ズの一例について示す外観図、第４図、第５図は本考案
に係わるズームレンズの一実施例について示す外観図で
、第４図は望遠端に於いての所定の撮影距離に焦点を合
、わせだ状態を、又、第５図に第４図示の状態から所定
の焦点距離迄ズーミングを行った状態を夫々示している
。１１・・・固定筒、ｌｌａ・・・焦点距離を表わす数値
目盛、ｌｌｂ・・・焦点合わせ用基準指標、１２・・・
ズ”−ミンク及び焦点合わせ用操作環、１２ａ・・・撮
影距離を表わす数値目盛、０・・・光軸。Fig. 1 is a schematic diagram showing an example of the lens configuration of an optically corrected zoom lens, Fig. 2 is a graph showing how the image plane moves during zooming in an optically corrected zoom lens, and Fig. 3 is a diagram showing an example of the lens configuration of an optically corrected zoom lens. FIGS. 4 and 5 are external views showing an example of a single-operating ring type optically corrected zoom lens. FIGS. 4 and 5 are external views showing an example of the zoom lens according to the present invention. FIG. FIG. 5 shows a state in which the lens is focused at a predetermined photographing distance and is aligned, and FIG. 5 shows a state in which zooming is performed from the state shown in FIG. 4 to a predetermined focal length. DESCRIPTION OF SYMBOLS 11... Fixed barrel, lla... Numerical scale showing focal length, llb... Reference index for focusing, 12...
Zoom and focusing operation ring, 12a...numerical scale indicating photographing distance, 0...optical axis.

Claims

[Scope of utility model registration request]

It is equipped with an operating ring that can both slide in the direction along the optical axis and rotate around the optical axis with respect to the fixed barrel, and the focal length can be changed by sliding the operating ring. In an optically corrected zoom lens that performs focusing, it is necessary to correct the deviation of the image plane from the planned image formation plane when setting the telephoto end or wide-angle end as the standard. (1) A zoom lens in which an index indicating the rotational angular position of the operating ring is marked on the fixed barrel.