JPH01282528A - Finder device using roof type reflecting mirror - Google Patents

Finder device using roof type reflecting mirror

Info

Publication number
JPH01282528A
JPH01282528A JP11337588A JP11337588A JPH01282528A JP H01282528 A JPH01282528 A JP H01282528A JP 11337588 A JP11337588 A JP 11337588A JP 11337588 A JP11337588 A JP 11337588A JP H01282528 A JPH01282528 A JP H01282528A
Authority
JP
Japan
Prior art keywords
roof
reflecting mirror
holder
hole
penta
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
JP11337588A
Other languages
Japanese (ja)
Other versions
JP2615828B2 (en
Inventor
Togo Teramoto
東吾 寺本
Mamoru Katsuragi
衛 葛城
Yasuhiro Miyoshi
三好 康博
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP11337588A priority Critical patent/JP2615828B2/en
Priority to US07/349,092 priority patent/US4926208A/en
Publication of JPH01282528A publication Critical patent/JPH01282528A/en
Priority to US07/487,206 priority patent/US4974014A/en
Application granted granted Critical
Publication of JP2615828B2 publication Critical patent/JP2615828B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To prevent distortion from arising an roof surfaces by joining the roof type reflecting mirror and a penta holder so that the claw of said mirror can enter the hole of the penta holder and a locking surface provided for the claw and a locking surface on the inner side of the hole are engaged. CONSTITUTION:In regard to the fitting of the roof type reflecting mirror 1 and the penta holder 9, firstly the two fitting legs 1k of the reflecting mirror 1 are put into the hole 9k of the holder 9, and secondly the other fitting leg 1l is put into a hole 9e with pressure. At this time, a 2nd reflecting mirror 2 is not bonded to the reflecting mirror 1, and opened forwardly; therefore it can be easily deformed and elastically returns to metering after fitted. As a result, not distortion remains on the roof surfaces 1g and 1g. Since the locking surfaces 1k' and 1l' of the fitting legs 1k and 1l are engaged with the locking surfaces 9k' and 9l', the reflecting mirror 1 never slips off the holder 9 owing to impact and vibration.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は屋根型反射鏡を使用したファインダー装置に関
し、さらに詳しくは、屋根型反射鏡とペンタホルダーの
結合に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a finder device using a roof-type reflector, and more particularly to a combination of a roof-type reflector and a penta holder.

従来の技術 ファインダー装置に屋根型反射鏡を使用する場合は、屋
根型反射鏡として、直角に交差した211反射を備えた
屋根面(以下ダハ面という)、ダハ面を保持する側壁、
接眼枠等をモールド成型により一体的に構成し、この屋
根型反射鏡をカメラボディあるいはペンタホルダーへ固
定して使用している。固定の方法としては、実公昭47
−24420号公報に示されているように、カメラボデ
ィと屋根型反射鏡を引張りバネで弾性的に結合し、ダハ
面の歪みを防止するものや、実公昭47−33317号
公報に示されているように、接眼レンズ取付部の下方か
らネジにより屋根型反射鏡をカメラボディへ固定するこ
とによって、ネジによる固定部とダハ面とを離しダハ面
に歪みを与えないようにしているもの等が知られている
When using a roof type reflector in a conventional technology finder device, the roof type reflector includes a roof surface (hereinafter referred to as a roof surface) having 211 reflections crossed at right angles, a side wall holding the roof surface,
The eyepiece frame and other parts are integrally formed by molding, and this roof-shaped reflector is used by being fixed to the camera body or penta holder. As for the method of fixing,
As shown in Japanese Utility Model Publication No. 47-33317, a camera body and a roof-type reflector are elastically connected with a tension spring to prevent distortion of the roof surface, as shown in Japanese Utility Model Publication No. 47-33317. As shown in the figure above, there are some models that fix the roof-type reflector to the camera body with screws from below the eyepiece mounting part, thereby separating the part fixed by the screws from the roof surface and preventing distortion of the roof surface. Are known.

発明が解決しようとする課題 しかしながら、前者の方法では、屋根型反射鏡の外部に
バネが設置されているため、屋根型反射鏡の囲シのスペ
ースが有効に活用できない(例えばフレキシブル基板を
ダノ・面に沿って配置するのが困難)上に、バネのスペ
ース分だけカメラボディが大型化してしまう。また、後
者の方法では、ネジによる固定のため、ダノ・面の歪み
を防止するにはネジの取付部をダ・・面から離す必要が
あり、特に接眼レンズ取付部が後方へ突出する等設計の
自由度が制限されてしまう。
Problems to be Solved by the Invention However, in the former method, since the spring is installed outside the roof-type reflector, the space surrounding the roof-type reflector cannot be used effectively (for example, if the flexible substrate is (difficult to place along a surface) and the camera body becomes larger due to the space for the spring. In addition, in the latter method, since it is fixed with screws, it is necessary to keep the screw attachment part away from the donut surface in order to prevent distortion of the dowel surface. freedom is limited.

また、接着剤を用いて固定する方法も考えられるが、接
着剤の硬化時の収縮によってダ・・面精度が悪化すると
いう問題がある。硬化時にもほとんど収縮しないシリコ
ン系の接着剤もあるが、硬化時間が長いので作業能率が
著しく低下してしまう。
A method of fixing using an adhesive may also be considered, but there is a problem that the surface accuracy deteriorates due to shrinkage of the adhesive when it hardens. There are silicone-based adhesives that hardly shrink when cured, but the long curing time significantly reduces work efficiency.

UV系の接着剤は、収縮や硬化時間を考えると理想的で
あるが、接着に要する設備が大がかりになってしまう。
UV-based adhesives are ideal in terms of shrinkage and curing time, but they require large-scale bonding equipment.

従って、本発明の目的は、ダノ・面精度に影響を与えず
に簡単に屋根型反射鏡を固定できるとともに、屋根型反
射鏡の囲りのスペースの活用を制限することがない。屋
根型反射鏡を使用したファインダー装置を提供すること
にある。
Accordingly, an object of the present invention is to be able to easily fix a roof-type reflector without affecting the dowel/surface accuracy, and to not limit the utilization of the space surrounding the roof-type reflector. An object of the present invention is to provide a finder device using a roof-type reflecting mirror.

課題を解決するための手段 上記目的を達成するために、本発明のファインダー装置
は、屋根型反射鏡として、ダ/・面と側壁とともに、側
壁の下部で端部が曲折しその曲折部の上部に第1の係止
面を持つ爪を弾性を有するようにモールド成型によシ一
体的に形成し、また、ファインダー用光束を通過させる
開口を有したペンタホルダーに、上記爪が侵入する穴を
設け、穴の内部内側に上記爪の第1の係止面と係合する
第2の係止面を設けたことを特徴とする。
Means for Solving the Problems In order to achieve the above object, the finder device of the present invention is a roof-type reflector, which has an end portion bent at the bottom of the side wall and a side wall, and an end portion bent at the bottom of the side wall. A claw having a first locking surface is integrally molded to have elasticity, and a hole into which the claw enters is formed in a penta holder having an opening through which the finder light beam passes. A second locking surface that engages with the first locking surface of the pawl is provided inside the hole.

作  用 従って、屋根型反射鏡の爪はペンタホルダーの穴に侵入
し、第1の係止面と第2の係止面が係合することにより
、屋根型反射鏡とペンホルダーが結合される。
Function: Therefore, the claw of the roof-type reflector enters the hole of the pen holder, and the first locking surface and the second locking surface engage with each other, thereby coupling the roof-type reflector and the pen holder.

実施例 以下図面を参照して本発明の実施例について説明する。Example Embodiments of the present invention will be described below with reference to the drawings.

第1図は本発明によるファインダーブロックの結合完成
品の斜視図、第2図はその構成図、第3図は第2図の構
成図に示す主要部品を異なる角度から示したものである
FIG. 1 is a perspective view of a complete assembled product of a finder block according to the present invention, FIG. 2 is a block diagram thereof, and FIG. 3 is a view showing the main components shown in the block diagram of FIG. 2 from different angles.

屋根型反射鏡(1)は、 内面に2つの直角に受蓋した
反射面を備えたダノ・面(If)、(Ig)と、ダノ・
面を保持する側壁部(la)、(lb)、後壁部(IC
)。
The roof-type reflector (1) has two mirror surfaces (If) and (Ig) that are covered at right angles on the inner surface, and a mirror surface (Ig).
Side walls (la), (lb) that hold the surface, rear wall (IC
).

土壁部(1d)の6面より構成されており、後壁部(I
C)には、接眼枠(1e)と測光用光束を通す為の開口
(lh)が、側壁部(la)、(lb)の下端には、ペ
ンタホルダー(9)への取付用足(lk)、(11)が
、またダハ面(1[)、’(1g)と側壁部(la)、
(lb)の前端には、ダハ面(If)、(Ig)の反射
鏡によって前方に導かれた光を接眼部へと反射する第2
反射鏡(2)の貼付面(1m)が、さらに前記接眼枠(
1e)の上部は、成形時の収縮がダノ・面(If)、(
Ig)への歪みを生じないように、切欠(1n)で(l
j)、(lk)K2分されており、(1j)上には測光
レンズホルダー(4)の貼付位置決め用ボス(1i)が
、それぞれモールドで一体に成形されている。
It is composed of 6 sides of the earth wall part (1d), and the rear wall part (I
C) has an eyepiece frame (1e) and an opening (lh) for passing the light beam for photometry, and the lower ends of the side walls (la) and (lb) have feet (lk) for attaching to the penta holder (9). ), (11) are also the roof surface (1[), '(1g) and the side wall (la),
At the front end of (lb), there is a second mirror that reflects the light guided forward by the reflectors on the roof surface (If) and (Ig) toward the eyepiece.
The attachment surface (1 m) of the reflector (2) is further attached to the eyepiece frame (
For the upper part of 1e), the shrinkage during molding is as follows: (If), (
In order to avoid distortion to Ig), the notch (1n)
j) and (lk) are divided into K2 parts, and a boss (1i) for positioning the attachment of the photometric lens holder (4) is integrally molded on (1j).

(3)はプラスチック製の接眼レンズで、左右のコバ面
方向に突出したフランジ部(3a)には、光軸に垂直な
当接面(3b)と、その反対側に突起(3C)が一体成
型されている。
(3) is a plastic eyepiece, and the flanges (3a) protruding toward the left and right edges have an abutment surface (3b) perpendicular to the optical axis and a projection (3C) on the opposite side. It is molded.

(4)は測光レンズホルダーで、下面(4a)には長大
(4E)が、前面(4b)には測光用開口(4d)と遮
光用ひさし部(4C)が、後面(4C)には爪状突起(
4g)が左右に1つづつそれぞれモールドで一体に成型
されている。この測光用レンズホルダー(4)の前面(
4b)の内側には測光レンズ(5)が固着され、後面(
4C)には測光用素子(不図示)が搭載された基板(6
)が、偏心ピン(7)によシ位置調節可能Kll!!り
付けられている。
(4) is a photometric lens holder, the bottom surface (4a) has an elongated lens (4E), the front surface (4b) has a photometric aperture (4d) and a light shielding eaves (4C), and the rear surface (4C) has a claw. protrusion (
4g) are integrally molded, one on each side. The front of this photometric lens holder (4) (
A photometric lens (5) is fixed to the inside of the rear surface (4b).
4C) is a board (6) on which a photometric element (not shown) is mounted.
) is adjustable in position using the eccentric pin (7). ! It is attached.

(8)はノイズシールド板で、第1図に示すように測光
用基板(6)をカバーするように測光レンズホルダー(
4)に取付けられる。
(8) is a noise shield plate, and as shown in Figure 1, the photometric lens holder (
4) Attached to.

(9)はペンタホルダーで、カメラボディへの取付穴(
9a)と、屋根型反射鏡(1)の取付用足(lk)、(
11)が入る穴(9k)、(91)と、ファインダー光
束を通過させる為の開口(9C)が設けられている。開
口(9C)のエツジ部(9b)は視野枠を形成している
(9) is a penta holder with a mounting hole (
9a), the mounting feet (lk) for the roof-type reflector (1), (
Holes (9k) and (91) into which the light beams 11) are inserted, and an opening (9C) through which the finder light beam passes are provided. The edge portion (9b) of the aperture (9C) forms a viewing frame.

(13)は焦点板で、ペンタホルダー(9)へ焦点板保
持スプリング(14)により取付けられる。(12)は
ファインダー内表示用の発光装置、(10)はプリズム
等のライトガイド、(11)はファインダー内表示て対
応した表示フィルムで、いずれもペンタホルダー(9)
に取り付けられる。
(13) is a focus plate, which is attached to the penta holder (9) by a focus plate holding spring (14). (12) is a light emitting device for display inside the viewfinder, (10) is a light guide such as a prism, (11) is a display film that corresponds to the display inside the viewfinder, and all of them are attached to a penta holder (9).
can be attached to.

保護カバー(15)は金庫性の薄板で、互いに直角をな
す(90°以上でもよい)屋根面(15F) 、 (1
5g)、及びこの屋根面にはさまれた領域(15h)か
らなる屋根部と、屋根部を支える側壁(15a) 、 
(15b)とで構成されており側壁(15a) 、 (
15b)下端には、保護カバー(15)をペンタホルダ
ー(9)とビスでカメラボディへ共線めする為の足(1
5k)、(151)、(15m)が、それぞれプレスに
て加工されている。
The protective cover (15) is a safe-like thin plate, and the roof surface (15F) and (1
5g), and a roof section consisting of a region (15h) sandwiched between the roof surfaces, and a side wall (15a) that supports the roof section,
(15b) and side walls (15a), (
15b) At the bottom end, there are feet (1) for aligning the protective cover (15) with the penta holder (9) and the camera body using screws.
5k), (151), and (15m) are each processed by a press.

次に、本実施例による屋根型反射鏡(1)とペンタホル
ダー(9)との結合を説明する。
Next, the connection between the roof-type reflecting mirror (1) and the penta holder (9) according to this embodiment will be explained.

第4図は両者の結合完成状態の上面図、第5図、第6図
はその結合部のE−E及びF−F断面図である。取付け
は、屋根型反射鏡(1)の2ケの取付用足(1k)の方
を先にペンタホルダー(9)の穴(9k)に入れてから
、他方の取付用足(1e)を穴(91りに圧入すること
Kよって達成される。この時屋根型反射鏡(1)には第
2反射鏡(2)がまだ接着されておらず前方が開放され
た状態にあり、容易に変形して、取付後は完全に弾性復
元する為、ダハ面(If)。
FIG. 4 is a top view of the completed state of the two, and FIGS. 5 and 6 are EE and FF sectional views of the joint. To install, first insert the two mounting feet (1k) of the roof reflector (1) into the holes (9k) of the penta holder (9), then insert the other mounting feet (1e) into the holes. (This is achieved by press-fitting the roof-type reflector (1) into the roof-type reflector (1). At this time, the second reflector (2) is not yet glued to the roof-type reflector (1) and the front side is open, so it is easily deformed. After installation, the roof surface (If) will be completely elastically restored.

(1g)に歪みを移す事はない。There is no distortion transferred to (1g).

取付後は、第5図、第6図に示すように取付用足(lk
)、(H’)の係止面(lk’)、(14′)がペンタ
ホルダー(9)の係止面(9につ、(94つと係合する
為、衝撃や振動によって、屋根型反射鏡(1)とペンタ
ホルダー(9)が外れることはない。また、係止面(9
に′)と(lkりおよび係止面(94つと(111!9
間には適当なすき間を設けている為に、ペンタホルダー
(9)をカメラボディへ取付ける際に発生する歪みが屋
根型反射鏡(1)に影響を及ぼす事はない。
After installation, attach the mounting feet (lk) as shown in Figures 5 and 6.
), (H') locking surfaces (lk'), (14') engage with the locking surfaces (9, (94) of the penta holder (9), so shocks and vibrations may cause roof-shaped reflections. The mirror (1) and penta holder (9) will not come off.Also, the locking surface (9)
ni') and (lkri and locking surface (94) and (111!9
Since an appropriate gap is provided between them, the distortion that occurs when attaching the penta holder (9) to the camera body will not affect the roof-type reflector (1).

尚、屋根型反射鏡(1)の取付用足(lk)、(1#)
及びペンタホルダー(9)の穴(9k)、(9g)の位
置は、上記実施例に限られるものではなく、例えば取付
用足(lk)、(IJ’)は、屋根型反射鏡(1)ノ両
側の側壁部(1a)(1b)にそれぞれ2個づつ計4個
でもよく、また、側壁部(Ia)、(lb)だけでなく
後壁部(IC)下部も利用可能である。但し、ペンタホ
ルダー(9)の穴(9k)(91)の位置を、本実施例
のように、カメラボディへの取付穴(9a)の近傍に設
けた場合は、スペースの点で一番有利である。
In addition, the mounting feet (lk), (1#) for the roof type reflector (1)
The positions of the holes (9k) and (9g) of the penta holder (9) are not limited to those in the above embodiment. A total of four may be used, two on each of the side walls (1a) and (1b) on both sides, and not only the side walls (Ia) and (lb) but also the lower part of the rear wall (IC) can be used. However, if the holes (9k) (91) of the penta holder (9) are located near the mounting hole (9a) to the camera body, as in this example, it is most advantageous in terms of space. It is.

また、屋根型反射鏡(1)は下方が開放されているため
に、組立作業中の防塵の点から焦点板(13)を装着し
てユニット化しておくことが望ましく、本実施例ではペ
ンタホルダー(9)によりユニット化を達成しているが
、ペンタホルダー(9)に相当する部材をカメラボディ
に一体的に設けておき、屋根型反射鏡(1)を直接カメ
ラボディに結合するようにしてもよい。但し、防塵ある
いはファインダーバックの調整等のためにはペンタホル
ダー(9)があった方が望ましい。
In addition, since the roof-type reflector (1) is open at the bottom, it is desirable to attach a focusing plate (13) to form a unit from the viewpoint of dust prevention during assembly. (9) achieves unitization, but a member equivalent to the penta holder (9) is provided integrally with the camera body, and the roof-type reflector (1) is directly connected to the camera body. Good too. However, it is desirable to have a penta holder (9) for dustproofing or adjusting the viewfinder back.

発明の効果 以上、詳細に説明してきたように本発明のファインダー
装置によると、屋根型反射鏡とペンタホルダーは、屋根
型反射鏡の爪がペンタホルダーの穴に侵入し、爪に設け
られた第1の係止面と穴の内部内側の第2の係止面が係
合することによ多結合される。結合時に、屋根型反射鏡
はわずかに弾性変形するが、結合後、完全に弾性復元す
る為にダハ面に歪みが発生することはなく所期の精度を
保つことができる。
Effects of the Invention As described above in detail, according to the finder device of the present invention, the roof-type reflector and the penta holder are such that the claw of the roof-type reflector enters the hole of the penta holder and The first locking surface and the second locking surface inside the hole engage with each other to form a multi-coupled connection. The roof-shaped reflector is slightly elastically deformed when it is joined, but after it is joined, it is completely elastically restored, so no distortion occurs on the roof surface, and the desired precision can be maintained.

また、結合のために必要とするスペースは、従来のガラ
スペンタプリズムを保持するのに必要とするスペースよ
りも小さくなるので、屋根型反射鏡の囲りのスペースを
有効に活用することが可能となる。
Additionally, the space required for coupling is smaller than the space required to hold a conventional glass pentaprism, making it possible to effectively utilize the space surrounding the roof-type reflector. Become.

さらに、分解あるいは組立が容易であるという効果も有
している。
Furthermore, it also has the effect of being easy to disassemble or assemble.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明によるファインダー装置のファインダー
ブロックの一実施例を示す斜視図、第2図は第1図のフ
ァインダーブロックの構成図、第3図は第2図の構成図
の主要部品の別の角度からの斜視図、第4図は屋根型反
射鏡とペンタホルダーの結合上面図、第5図は第4図の
E−E断面図第6図は第5図のF−F断面図である。 1・・・屋根型反射鏡、  If、Ig・・・ダ・・面
、la、lb・・・側壁、lk、Il!・・・爪、lk
’、11!’・・・第1の係止面、9C・・・開口、9
k 、 9J・・・穴、9に’ 、 91’・・・第2
の係止面。 出願人  ミノルタカメラ株式会社 第2図 第3図
FIG. 1 is a perspective view showing one embodiment of a finder block of a finder device according to the present invention, FIG. 2 is a configuration diagram of the finder block shown in FIG. 1, and FIG. Figure 4 is a top view of the combination of the roof-type reflector and penta holder; Figure 5 is a cross-sectional view taken along line E-E in Figure 4; Figure 6 is a cross-sectional view taken along line F-F in Figure 5. be. 1... Roof type reflector, If, Ig... Da... face, la, lb... side wall, lk, Il! ...nails, lk
', 11! '...first locking surface, 9C...opening, 9
k, 9J...hole, 9', 91'...second
locking surface. Applicant Minolta Camera Co., Ltd. Figure 2 Figure 3

Claims (1)

【特許請求の範囲】 1、直角に交差した2反射面を持つダハ面と、ダハ面を
保持する側壁と、側壁の下部で端部が曲折しその曲折部
の上部に第1の係止面を持つ爪と、を一体的にモールド
成形により形成した弾性を有する屋根型反射鏡と、 ファインダー用光束を通過させる開口と、上記屋根型反
射鏡の爪が侵入する穴と、穴の内部内側で上記爪の第1
の係止面と係合する第2の係止面と、を有したペンタホ
ルダーと、を有することを特徴とする屋根型反射鏡を使
用したファインダー装置。 2、前記ペンタホルダーがカメラボディと一体的に設け
られていることを特徴とする請求項1記載の屋根型反射
鏡を使用したファインダー装置。
[Claims] 1. A roof surface having two reflective surfaces intersecting at right angles, a side wall holding the roof surface, an end bent at the bottom of the side wall, and a first locking surface at the top of the bent portion. a roof-shaped reflector having elasticity formed integrally by molding, an aperture through which the finder light beam passes, a hole into which the claw of the roof-type reflector enters, and an inner side of the hole. The first of the above nails
A finder device using a roof-shaped reflecting mirror, characterized in that it has a second locking surface that engages with the locking surface of the penta holder. 2. The finder device using a roof-shaped reflecting mirror according to claim 1, wherein the penta holder is provided integrally with the camera body.
JP11337588A 1988-05-09 1988-05-09 Viewfinder using a roof-type reflector Expired - Lifetime JP2615828B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11337588A JP2615828B2 (en) 1988-05-09 1988-05-09 Viewfinder using a roof-type reflector
US07/349,092 US4926208A (en) 1988-05-09 1989-05-09 Photographic viewfinder assembly
US07/487,206 US4974014A (en) 1988-05-09 1990-03-20 Photographic viewfinder assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11337588A JP2615828B2 (en) 1988-05-09 1988-05-09 Viewfinder using a roof-type reflector

Publications (2)

Publication Number Publication Date
JPH01282528A true JPH01282528A (en) 1989-11-14
JP2615828B2 JP2615828B2 (en) 1997-06-04

Family

ID=14610696

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11337588A Expired - Lifetime JP2615828B2 (en) 1988-05-09 1988-05-09 Viewfinder using a roof-type reflector

Country Status (1)

Country Link
JP (1) JP2615828B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0616948U (en) * 1992-08-06 1994-03-04 旭光学工業株式会社 Interchangeable viewfinder device for single-lens reflex camera
TWI498533B (en) * 2014-02-21 2015-09-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0616948U (en) * 1992-08-06 1994-03-04 旭光学工業株式会社 Interchangeable viewfinder device for single-lens reflex camera
TWI498533B (en) * 2014-02-21 2015-09-01

Also Published As

Publication number Publication date
JP2615828B2 (en) 1997-06-04

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