JPS5846328A - Changing device for lens extension and finder visual field of auto-focus camera - Google Patents
Changing device for lens extension and finder visual field of auto-focus cameraInfo
- Publication number
- JPS5846328A JPS5846328A JP14317781A JP14317781A JPS5846328A JP S5846328 A JPS5846328 A JP S5846328A JP 14317781 A JP14317781 A JP 14317781A JP 14317781 A JP14317781 A JP 14317781A JP S5846328 A JPS5846328 A JP S5846328A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- camera
- prism
- auto
- extension
- 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
Links
- 230000000007 visual effect Effects 0.000 title 1
- 239000011347 resin Substances 0.000 claims abstract 3
- 229920005989 resin Polymers 0.000 claims abstract 3
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 241000735235 Ligustrum vulgare Species 0.000 abstract 1
- 238000000034 method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
- Viewfinders (AREA)
Abstract
Description
【発明の詳細な説明】
本発明の目的は、市販の自動焦点カメラにコンバージョ
ンレンズの使用を可能にすることにある。DETAILED DESCRIPTION OF THE INVENTION It is an object of the present invention to enable the use of conversion lenses in commercially available autofocus cameras.
一般市販の自動焦点カメラは、測距機構とレンズ繰り出
し機構が連動して居シ、レンズの繰シ出し量は測距機構
の指令によって設定される仕組となっている。A commercially available autofocus camera has a distance measuring mechanism and a lens extending mechanism that work together, and the amount of lens extension is set by a command from the ranging mechanism.
一方コンバージョンレンズは、これを撮影レンズに結合
することによって撮影レンズのｆを変更するのが目的で
あり、ｆかかわれば繰り出し量もかわってくる。On the other hand, the purpose of a conversion lens is to change the f of the taking lens by connecting it to the taking lens, and depending on the f, the amount of extension will also change.
自動焦点カメラの測距部とレンズ繰り出し部の連動機構
は、普通、レンズのｆは変らないとしてセットしである
ので、コンバージョンレンズは使用出来ないのである。The interlocking mechanism between the distance measuring section and the lens extending section of an autofocus camera is normally set so that the f of the lens does not change, so a conversion lens cannot be used.
第１の発明は、自動焦点カメラの測距部受光窓の前部に
Ｄプリズムを配置することによって、この問題の解決を
計った。The first invention attempts to solve this problem by arranging a D prism in front of the light receiving window of the distance measuring section of an autofocus camera.
コンバージョンレンズの使用に際しては。When using conversion lenses.
更に画角の拡大若しくは縮小が起るので、これに対応す
る視野のファインダーを考慮する必要がある。Furthermore, since the angle of view is expanded or reduced, it is necessary to consider a finder with a corresponding field of view.
第２の発明ではこの点も同時に解決するべく、カメラフ
ァインダーの前部に手段を設けてファインダー視野の変
更を計った。In the second invention, in order to solve this problem at the same time, a means was provided at the front of the camera finder to change the field of view of the finder.
以上、２つの変更手段、即ち、レンズ繰り出し量の変更
とファインダー視野の変更を。As mentioned above, there are two changing methods: changing the amount of lens extension and changing the viewfinder field of view.
簡単且低廉に処理する目的で、一体構造に構成し、これ
を、透明合成樹脂による成形加工で製造する方法をとっ
た。For the purpose of simple and inexpensive processing, we adopted a method of constructing an integral structure and manufacturing it by molding with transparent synthetic resin.
以下図面によって本発明の実施の一例を説明すると、■
は自動焦点カメラである。■のコンバージョンレンズを
■のカメラレンズ前部に装着したとき、全レンズ系の合
成ｔは。An example of the implementation of the present invention will be explained below with reference to the drawings.
is an autofocus camera. When the conversion lens (■) is attached to the front of the camera lens (■), the composite t of the entire lens system is.
カメラレンズ■のｆとコンバージョンレンズの倍率との
積となり、ｆが変化すると同時に被写体迄の距離に対応
するレンズの繰り出し量も変化する。This is the product of f of the camera lens (2) and the magnification of the conversion lens, and as f changes, the amount of lens extension corresponding to the distance to the subject also changes.
第１の発明は、測距部受光窓■の前部にＤプリズム■を
置くことによって構成される部分である。今、被写体よ
りＤプリズム■を通して測距部受光窓に光が入射すると
、Ｄプリズム■が無い場合にくらべて入射光の角度のズ
レが生ずる。Ｄプリズム■の角度の設定は。The first invention is a part constructed by placing a D prism (2) in front of the distance measuring section light receiving window (2). Now, when light enters the light receiving window of the distance measuring section from the subject through the D prism (2), the angle of the incident light will be deviated compared to the case without the D prism (2). How to set the angle of D prism ■.
撮影レンズ系の繰り出し量の変化に対応した値とすれば
よい。It may be a value that corresponds to a change in the amount of extension of the photographic lens system.
これによって適正な繰り出し量がカメラの測距機構より
レンズに伝達され、コンバージョンレンズ装着時の撮影
が可能となる。As a result, the appropriate amount of extension is transmitted from the distance measuring mechanism of the camera to the lens, making it possible to take pictures when a conversion lens is attached.
次に第二の発明について説明する。自動焦点カメラ■に
装着するコンバージョンレンズ■がテレフォト用の場合
、Ｄプリズム■に接続し、且ファインダー窓■の前部に
位置し。Next, the second invention will be explained. If the conversion lens ■ attached to the autofocus camera ■ is for telephoto use, it is connected to the D prism ■ and located in front of the viewfinder window ■.
カメラファインダーを眺いた時ファインダー視野の周辺
をテレフォト用にトリミングする大きさの枠■を設ける
。又、コンバージョンレンズ■がワイドアングル用の場
合、Ｄプリズムに接続し、且ファインダー窓■の前部に
位置し、カメラファインダーを眺いた時、ファインダー
視野がワイドアングル用に拡大するディオプトリイを持
つ凹レンズ■を設はファインダー視野の変更を計った。When looking through the camera viewfinder, a frame sized to trim the periphery of the viewfinder's field of view for telephoto use is provided. In addition, when the conversion lens ■ is for wide angle use, it is connected to the D prism and is located in front of the viewfinder window ■, and is a concave lens with a diopter that expands the viewfinder field of view for wide angle use when looking through the camera viewfinder. The design was designed to change the viewfinder field of view.
■は本発明による装置。(2) is a device according to the present invention.
図は本発明に係るもので、第１図はテレフォト用−１ｆ
ｆンバ一ジヨンレンス装着時の実施例を示す斜視図、第
２図はワイドアングル用コン／（−ジョンレンズ装着時
の実施例を示す斜視図である。
■・・・・・・・・・・・自動焦点カメラ■・・・・・
・・・・・・・カメラレンズ■・・・・・・・・・・・
測距部受光窓■・・・・・・・・・・・・ファインター
窓■・・・・・・・・・・・・コンバージョンレンズ■
・・・・・・・・・・・・Ｄプリズム■・・・・・・・
・・・・・枠
■・・・・・・・・・・・・凹レンズ
■・・・・・・・・・・・・本発明による装置特許出願
人 峯 島 眞
５−The figures are related to the present invention, and Figure 1 is for telephoto -1f.
Fig. 2 is a perspective view showing an embodiment when a wide-angle lens is attached.・Auto-focus camera■・・・・・・
・・・・・・Camera lens■・・・・・・・・・・・・
Distance measurement unit light receiving window■・・・・・・・・・Finter window■・・・・・・・・・Conversion lens■
・・・・・・・・・・・・D Prism■・・・・・・・・・
・・・・・・Frame ■・・・・・・・・・・・・Concave lens■・・・・・・・・・Applicant for the patent for the device according to the present invention Makoto Mineshima 5-
Claims (1)
成形加工によるＤプリズムを配置した該カメラのレンズ
繰り出し量変更装置。 （２、特許請求の範囲（１）に記載のＤプリズムと一体
構造をなし、且、自動焦点カメラのファインダー窓の前
部に位置する様に枠または凹レンズを設けた該カメラの
ファインダー視野変更装置。(1) A lens extension amount changing device for an autofocus camera, in which a D prism molded from a transparent resin is disposed in front of the light receiving window of the distance measuring section of the camera. (2. A device for changing the viewfinder field of view of an autofocus camera, which has an integral structure with the D prism according to claim (1) and is provided with a frame or a concave lens so as to be located in front of the finder window of the autofocus camera. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14317781A JPS5846328A (en) | 1981-09-12 | 1981-09-12 | Changing device for lens extension and finder visual field of auto-focus camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14317781A JPS5846328A (en) | 1981-09-12 | 1981-09-12 | Changing device for lens extension and finder visual field of auto-focus camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5846328A true JPS5846328A (en) | 1983-03-17 |
Family
ID=15332691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14317781A Pending JPS5846328A (en) | 1981-09-12 | 1981-09-12 | Changing device for lens extension and finder visual field of auto-focus camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5846328A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5647706U (en) * | 1979-09-19 | 1981-04-28 | ||
| JPS60178413A (en) * | 1984-02-27 | 1985-09-12 | Asahi Optical Co Ltd | Focus correcting device of camera |
-
1981
- 1981-09-12 JP JP14317781A patent/JPS5846328A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5647706U (en) * | 1979-09-19 | 1981-04-28 | ||
| JPS5931287Y2 (en) * | 1979-09-19 | 1984-09-05 | 日立機電工業株式会社 | Sand raking machine |
| JPS60178413A (en) * | 1984-02-27 | 1985-09-12 | Asahi Optical Co Ltd | Focus correcting device of camera |
| JPH0377971B2 (en) * | 1984-02-27 | 1991-12-12 | Asahi Optical Co Ltd |
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