JPS5828829U

JPS5828829U - Focus correction device for infrared photography of telephoto lens with high magnification viewfinder

Info

Publication number: JPS5828829U
Application number: JP12175381U
Authority: JP
Inventors: 山崎　章吾
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-08-19
Filing date: 1981-08-19
Publication date: 1983-02-24
Also published as: JPH0125941Y2

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る高倍率ファインダ付望
遠レンズのファインダ及び望遠レンズの縦断面図を含む
連結説明図、第２図はその底面図、第３図は第１図のｍ
−ｍ線部分拡大断面図、第４図は第３図の一部切欠き底
面図である。１・・・望遠レンズ、３・・・固定鏡胴、５・・・移動
鏡胴、７．７′・・・ファインダ、８・・・鏡体アーム
、１０・・・固定鏡胴、１１・・・移動鏡胴、１７・・
・対物アーム、１８・・・切換ノブ、１８′・・・偏心
軸部、２０・・・偏心　　・作動板、２１・・・クリッ
プばね、２５・・・切換ストップビス。FIG. 1 is an explanatory diagram of a telephoto lens with a high magnification finder according to an embodiment of the present invention, including a vertical cross-sectional view of the finder and the telephoto lens, FIG. 2 is a bottom view thereof, and FIG. 3 is the m of FIG.
FIG. 4 is a partial enlarged sectional view taken along line -m, and FIG. 4 is a partially cutaway bottom view of FIG. DESCRIPTION OF SYMBOLS 1... Telephoto lens, 3... Fixed lens barrel, 5... Movable lens barrel, 7.7'... Finder, 8... Lens arm, 10... Fixed lens barrel, 11.・・Moving lens barrel, 17・・
-Objective arm, 18...Switching knob, 18'...Eccentric shaft section, 20...Eccentricity -Operating plate, 21...Clip spring, 25...Switching stop screw.

Claims

[Scope of utility model registration request]

A photographic telephoto lens in which the front group lens is attached to its movable lens barrel and the rear group lens is attached to its fixed lens barrel, and the lens has the same focal length as the front group lens and the same angle of view as the telephoto lens. a finder having an objective lens mounted on the movable barrel and an eyepiece mounted on the fixed barrel, and connected by the movable barrel and the fixed barrel, respectively;
In a telephoto lens with a finder in which both of the movable barrels are fitted into the fixed barrel and move linearly in conjunction with each other, an objective arm 17 is integrated with the movable barrel 11 of the finder 7.
To make the switching knob 18 having an eccentric shaft portion 18' rotatable, an eccentric operating plate 20 having a notch or opening 19 formed in the horizontal plate surface is fixed to the movable lens barrel 5 of the telephoto lens 1, and the switching knob 18 is fixed to the movable lens barrel 5 of the telephoto lens 1. The eccentric shaft portion 18' of the knob 18 is fitted into the opening 19 of the eccentric actuating plate 20, and the linear movement distance of the eccentric actuating plate 20 due to the rotation of the eccentric shaft portion 18' is measured with respect to the telephoto lens 1 during black-and-white infrared film photography. A focus correction device for infrared photography of a telephoto lens with a high magnification finder, characterized in that the focus correction distance matches the focus correction distance of the telephoto lens with a high magnification finder.