JP3051995U - Focus adjustment device for large format film cameras - Google Patents
Focus adjustment device for large format film camerasInfo
- Publication number
- JP3051995U JP3051995U JP1998000908U JP90898U JP3051995U JP 3051995 U JP3051995 U JP 3051995U JP 1998000908 U JP1998000908 U JP 1998000908U JP 90898 U JP90898 U JP 90898U JP 3051995 U JP3051995 U JP 3051995U
- Authority
- JP
- Japan
- Prior art keywords
- film
- reflecting mirror
- large format
- adjustment device
- 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.)
- Expired - Lifetime
Links
Landscapes
- Viewfinders (AREA)
- Cameras In General (AREA)
Abstract
(57)【要約】
【目的】 大判フィルム用カメラのピント合わせ確認装
置
【構成】 レンズとフィルムの限られた間隔内に、最小
限必要面積を有した上下可能な反射鏡によって構成され
たカメラ。
(57) [Abstract] [Purpose] A focus confirmation device for a large format film camera [Configuration] A camera configured by a vertically movable reflector having a minimum required area within a limited space between a lens and a film.
Description
【001】[0101]
本考案はビューカメラで一般的な4×5インチ、8×10インチ等でのピント 合わせを35ミリ一眼レフカメラと同等にピント合わせが正確、迅速、容易に行 えるようにするものである。 The present invention is intended to enable accurate, quick and easy focusing at 4 × 5 inches, 8 × 10 inches, etc., which is common in view cameras, as well as at 35 mm single-lens reflex cameras.
【002】[0092]
ビューカメラは、レンズを経由しての受像部にスリガラスが用意されており、 このスリガラス上でピント合わせが行われる。 In the view camera, a ground glass is prepared in an image receiving unit via a lens, and focusing is performed on the ground glass.
【003】 ピント合わせが終了後、スリガラスを取りはずすか、後方にずらしてピントの 来ている部分に、フィルムが挿入されているフィルムホルダーを装着して撮影が 行われる。この作業が必要条件であり、正確さを欠き、かつ無駄な時間を要して いる。After focusing, the user removes the ground glass or shifts it backward to attach a film holder with a film inserted to the part where the focus is coming in, and then take a picture. This is a prerequisite, inaccurate and wastes time.
【004】[0093]
ビューカメラを35ミリカメラのように一眼レフにするには、フィルムとレン ズの中間に45度の角度に設置された反射鏡を装着すると容易に解決できるが、 広角レンズを使用すると、レンズとフィルムの間隔が無く、画像の全部を反射さ せる事が困難である。 To change the view camera to a single-lens reflex camera like a 35mm camera, it is easy to solve this problem by installing a reflector installed at a 45-degree angle between the film and the lens. There is no space between the films, and it is difficult to reflect the entire image.
【005】[0056]
画像のすべてを見るのでなく、ピント合わせをする、あるいは画像の一部だけ を確認するのであれば、レンズとフィルム面までの限られた間隔に合わせた細長 い反射鏡を用意すると良い。 If you want to focus or check only a part of the image instead of seeing the entire image, it is advisable to prepare a slender reflector that matches the limited distance between the lens and the film surface.
【006】 フィルム前方に反射鏡が有ると、撮影時にじゃまになるので、ピント合わせ終 了後に、レバー等で反射鏡を上方、あるいは下方へ受像部の外へ移動させると良 い。If there is a reflecting mirror in front of the film, it will be a hindrance when taking a picture. Therefore, it is preferable to move the reflecting mirror upward or downward with a lever or the like to the outside of the image receiving unit after focusing.
【007】007
カメラ本体にフィルムホルダーを装着したままでピント合わせができ、これを 終了するとレバー等で反射鏡部分を移動させ、フィルムホルダーの引蓋を引いて 撮影となる。 Focusing can be performed while the film holder is attached to the camera body. When this is completed, the reflecting mirror is moved with a lever or the like, and the lid of the film holder is pulled to shoot.
【008】[0098]
実施例については図面を参照にして説明する。 図1に於いて、レンズIは2のヘリコイド方式のねじで組込まれ、前後に移動が 可能である。3は蛇腹を兼用しているレンズボードである。4は45度の角度を 有する反射鏡で、5は画像を有視化させる部分で、有視可された画像は光学系組 立を経由して6の反射鏡を経て7の有視窓へ達する。 Embodiments will be described with reference to the drawings. In FIG. 1, the lens I is incorporated with two helicoid type screws and can be moved back and forth. Reference numeral 3 denotes a lens board that also serves as a bellows. 4 is a reflecting mirror having an angle of 45 degrees, 5 is a part for visualizing an image, and the visible image is passed through a reflecting mirror of 6 via an optical system assembly to a viewing window of 7. Reach.
【009】 4と5によって構成された反射鏡及び有視化部分は、タイミングベルトやチェ ーン、ワイヤーなどに部品8によって取りつけられ、下方に降りた場合には9の 台座上に常時定められた位置に来るようになる。The reflecting mirror and the visualized portion constituted by 4 and 5 are attached to a timing belt, a chain, a wire, and the like by a component 8, and are fixed on the pedestal 9 when descending downward. To come to the right position.
【010】 4の反射鏡から7の有視窓までの構成についてはカメラの軽量化や小型化、計 測装置の装着などによりいろいろ考えられ、4と5によって構成されている反射 鏡部分を支えながら上下移動させるタイミングベルトシャフトやチェーン、ワイ ヤーなどによる上下運動も考えられる。Various configurations from the reflector 4 to the visual window 7 can be considered by reducing the weight and size of the camera, mounting a measuring device, and the like. The reflector portion constituted by 4 and 5 is supported. Vertical movement by a timing belt shaft, chain, wire, etc., which moves up and down, is also conceivable.
【011】 4と5によて構成されている反射鏡部分を支えているタイミングベルトはレン ズとフィルムを結ぶ画像の外のカメラ両側に装着されており、反射鏡部分を上部 へ移動させると、これも画像の外に出ることになる。The timing belt supporting the reflecting mirror portion constituted by 4 and 5 is attached to both sides of the camera outside the image connecting the lens and the film, and when the reflecting mirror portion is moved upward. , Which also goes out of the image.
【012】[0122]
フィルムホルダーをセットしたままピント合わせが可能となり、この装置を利 用して諸計測も可能となる。 Focusing is possible with the film holder set, and various measurements can be made using this device.
移動可能な反射鏡を有した一眼レフカメラ仕様の大判フ
ィルム使用カメラの断面図である。FIG. 2 is a cross-sectional view of a single-lens reflex camera using a large-format film having a movable reflecting mirror.
Claims (1)
に許される範囲の面積を有する反射鏡を光軸線上に45
度の角度に設置し、この画像を反射によりファインダー
まで画像を延長し、撮影時にはこの45度の反射鏡をフ
ィルム前方より移動させるように構成されている画像直
視装置。1. A reflecting mirror having an area within an allowable range within a limited space between a lens and a film is placed on the optical axis at 45 °.
An image direct-viewing device which is installed at an angle of degree, extends the image to a finder by reflection, and moves the 45-degree reflecting mirror from the front of the film when photographing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1998000908U JP3051995U (en) | 1998-01-21 | 1998-01-21 | Focus adjustment device for large format film cameras |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1998000908U JP3051995U (en) | 1998-01-21 | 1998-01-21 | Focus adjustment device for large format film cameras |
Publications (1)
Publication Number | Publication Date |
---|---|
JP3051995U true JP3051995U (en) | 1998-09-11 |
Family
ID=43186127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1998000908U Expired - Lifetime JP3051995U (en) | 1998-01-21 | 1998-01-21 | Focus adjustment device for large format film cameras |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3051995U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04134295U (en) * | 1991-06-06 | 1992-12-14 | 川嶋工業株式会社 | empty can crusher |
-
1998
- 1998-01-21 JP JP1998000908U patent/JP3051995U/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04134295U (en) * | 1991-06-06 | 1992-12-14 | 川嶋工業株式会社 | empty can crusher |
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