JPH09113784A - Focus ring adapter - Google Patents

Focus ring adapter

Info

Publication number
JPH09113784A
JPH09113784A JP7266953A JP26695395A JPH09113784A JP H09113784 A JPH09113784 A JP H09113784A JP 7266953 A JP7266953 A JP 7266953A JP 26695395 A JP26695395 A JP 26695395A JP H09113784 A JPH09113784 A JP H09113784A
Authority
JP
Japan
Prior art keywords
focus ring
lens barrel
members
adapter
ring adapter
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
Application number
JP7266953A
Other languages
Japanese (ja)
Inventor
Yuichi Katagishi
勇一 片岸
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.)
Nikon Corp
Original Assignee
Nikon Corp
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 Nikon Corp filed Critical Nikon Corp
Priority to JP7266953A priority Critical patent/JPH09113784A/en
Publication of JPH09113784A publication Critical patent/JPH09113784A/en
Pending legal-status Critical Current

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  • Lens Barrels (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve the operability of a lens barrel when one leg is fitted by providing the focus ring adapter with a focus ring extension part which is larger in external diameter than the external cylinder of the lens barrel and extends from a fitting part toward an optical-axis subject. SOLUTION: This focus ring adapter 8 consists principally of the fitting part 8e and extension part 8f. The fitting part 8e is installed in the focus ring of the lens barrel and consists of two sandwiching members 8b and three fixed parts. The sandwiching members 8b are nearly circular members and those two sandwiching members 8b are put together to form a nearly circular ring which is a little larger in external diameter than the focus ring 3. The extension part 8f is a cylindrical member which extends from the fitting part 8e forward along the optical axis almost to a tripod seat 4 and is larger in diameter than the external cylinder of the lens barrel and never comes into frictional contact with the lens barrel when rotated. Further, the extension part 8f is equipped with a rubber ring 8a has a knurlizing tool on its outer peripheral surface.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、レンズ鏡筒のフォ
ーカス環アダプターに関し、特に、三脚座を備える超望
遠レンズ鏡筒のフォーカス環アダプターに関するもので
ある。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a focus ring adapter for a lens barrel, and more particularly to a focus ring adapter for a super telephoto lens barrel having a tripod mount.

【0002】[0002]

【従来の技術】図3〜図5は、従来のレンズ鏡筒を示す
図であり、図3は側面図、図4は光軸に垂直なフォーカ
ス環の断面図、図5は三脚座に一脚を取り付けた状態に
おいてレンズ鏡筒を手で支持しているところを示す側面
図である。図3において、レンズ鏡筒後端の取付部1
は、バヨネット方式によりレンズ鏡筒をカメラ本体(不
図示)に取り付けるための部位である。また、絞り環2
は、光軸中心に回転可能な状態で設置された環状部材で
あり、これを手動により回転操作することにより、レン
ズ鏡筒内部に設置された不図示の絞り機構の開口径が調
整される。三脚座4は、レンズ鏡筒を三脚(不図示)に
固定するためのものであり、レンズ鏡筒の略中央部の外
周面にリング部4cをはめることにより取り付けられ
る。三脚座4は、取り付けられた状態において光軸中心
に回転可能であり、クランプ4aを締めることにより固
定される。なお、この三脚座4において、不図示の三脚
は、三脚座取付部4bに取り付けられる。
3 to 5 are views showing a conventional lens barrel. FIG. 3 is a side view, FIG. 4 is a sectional view of a focus ring perpendicular to the optical axis, and FIG. FIG. 6 is a side view showing a state where the lens barrel is supported by hand with the legs attached. In FIG. 3, the mounting portion 1 at the rear end of the lens barrel
Is a part for attaching the lens barrel to the camera body (not shown) by the bayonet method. Also, the diaphragm ring 2
Is an annular member rotatably installed around the optical axis, and by manually rotating the annular member, the aperture diameter of a diaphragm mechanism (not shown) installed inside the lens barrel is adjusted. The tripod seat 4 is for fixing the lens barrel to a tripod (not shown), and is attached by fitting the ring portion 4c to the outer peripheral surface of the lens barrel at the substantially central portion. The tripod seat 4 is rotatable about the optical axis in the attached state, and is fixed by tightening the clamp 4a. In addition, in the tripod mount 4, a tripod (not shown) is attached to the tripod mount attachment portion 4b.

【0003】フォーカス環3は、手動により光学系の合
焦操作を行うための環状部材であり、絞り環2と同様
に、レンズ鏡筒に回転可能に設置されている。図4に示
すように、フォーカス環3の外周面には、光軸と平行方
向に縦長く伸びる凹凸からなるローット3aが施されて
おり、フォーカス環3の操作時における手の滑りを防止
している。なお、ここに示すレンズ鏡筒においてフォー
カス環3を操作する場合に、撮影者は、図3に示すよう
に手を三脚座4とフォーカス環3の間に入れてフォーカ
ス環3を回転させる。このために、フォーカス環3は、
操作時の便宜を考慮して、手が三脚座4のリング部4c
と三脚座取付部4bの連結部4dに当たらないようにリ
ング部4cから光軸後方へ十分離れた位置に配置されて
いる。
The focus ring 3 is an annular member for manually performing the focusing operation of the optical system, and like the diaphragm ring 2, is rotatably installed on the lens barrel. As shown in FIG. 4, the outer periphery of the focus ring 3 is provided with a rot 3a consisting of irregularities extending long in the direction parallel to the optical axis to prevent the hand from slipping when the focus ring 3 is operated. There is. When operating the focus ring 3 in the lens barrel shown here, the photographer puts his / her hand between the tripod mount 4 and the focus ring 3 to rotate the focus ring 3 as shown in FIG. To this end, the focus ring 3
In consideration of convenience during operation, the hand is the ring portion 4c of the tripod seat 4.
And is arranged at a position sufficiently distant from the ring portion 4c rearward of the optical axis so as not to hit the connecting portion 4d of the tripod mount attachment portion 4b.

【0004】[0004]

【発明が解決しようとする課題】しかし、前述した従来
のレンズ鏡筒は、三脚以外にも一脚を三脚座4に取り付
ける場合が多い、又は、状況により一脚しか使用できな
い場合がある。一脚を使用した場合は、図3に示すよう
に、三脚座4より光軸後方においてレンズ鏡筒を支持す
る手の構え方では安定感がなく、図5に示すように三脚
座4を抱え込むようにしてレンズ鏡筒を保持するのが一
般的である。ところが、図5に示すように構えた場合、
フォーカス環3と手との間の距離が長くなり、操作が困
難となる、又は操作不能となるという問題点があった。
However, in the above-described conventional lens barrel, a monopod is often attached to the tripod seat 4 in addition to the tripod, or only one monopod can be used depending on the situation. When a monopod is used, as shown in FIG. 3, there is no sense of stability in the manner of holding the lens barrel behind the tripod base 4 as the optical axis, and the tripod base 4 is held as shown in FIG. The lens barrel is generally held in this way. However, if you set it up as shown in FIG.
There is a problem in that the distance between the focus ring 3 and the hand becomes long, making the operation difficult or inoperable.

【0005】[0005]

【課題を解決するための手段】前記課題を解決するため
に、請求項1に係る発明は、三脚座よりカメラボディ側
において、フォーカス環を有する三脚座付きレンズ鏡筒
のフォーカス環アダプターであって、フォーカス環に固
定される取付部(8e)と、レンズ鏡筒の外筒より大径
であって、取付部より光軸被写体側へ延びるフォーカス
環延長部(8f)とを有することを特徴とする。
In order to solve the above-mentioned problems, the invention according to claim 1 is a focus ring adapter for a lens barrel with a tripod seat having a focus ring on the camera body side from a tripod seat, It is characterized by having an attachment portion (8e) fixed to the focus ring and a focus ring extension portion (8f) having a diameter larger than that of the outer barrel of the lens barrel and extending toward the optical axis subject side from the attachment portion. .

【0006】請求項2に係る発明は、請求項1に記載の
フォーカス環アダプターにおいて、取付部は、2つの半
円状部材(8b)と、2つの半円状部材を一方の端部に
おいて回転可能に結合する結合部材(8d)と、2つの
半円状部材の他方の端部を連結する連結部材(8g、8
h、9)とを備え、2つの半円状部材が、結合部材を支
持点としてフォーカス環を外周側から挟み込み、連結部
材によって連結されることにより、フォーカス環に設置
されることを特徴とする。
According to a second aspect of the present invention, in the focus ring adapter according to the first aspect, the attachment portion includes two semicircular members (8b) and two semicircular members rotated at one end thereof. A coupling member (8d) that is capable of coupling and a coupling member (8g, 8g) that couples the other ends of the two semicircular members.
h, 9) and two semi-circular members are installed on the focus ring by sandwiching the focus ring from the outer peripheral side with the coupling member as a support point and being coupled by the coupling member. .

【0007】[0007]

【発明の実施の形態】以下、図面等を参照して、実施形
態について、さらに詳しく説明する。 (第1実施形態)図1は、本発明に係るフォーカス環ア
ダプターの実施形態がレンズ鏡筒に設置されているとこ
ろを示す側面図である。また、図2は、本実施形態のフ
ォーカス環アダプターのみを光軸後方(カメラボディ
側)から見た図である。なお、図1及び図2において、
図3〜図5に示したレンズ鏡筒と同様な機能を果たす部
分には、同一の符号を付し、以下における重複する説明
を適宜省略する。図1に示されるように、本実施形態の
フォーカス環アダプター8は、主に取付部8eと、延長
部8fとから構成される。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments will be described in more detail with reference to the drawings. (First Embodiment) FIG. 1 is a side view showing an embodiment of a focus ring adapter according to the present invention installed in a lens barrel. Further, FIG. 2 is a view of only the focus ring adapter of the present embodiment as seen from the rear side of the optical axis (camera body side). In FIGS. 1 and 2,
Portions having the same functions as those of the lens barrel shown in FIGS. 3 to 5 are denoted by the same reference numerals, and the duplicated description below will be appropriately omitted. As shown in FIG. 1, the focus ring adapter 8 of the present embodiment mainly includes an attachment portion 8e and an extension portion 8f.

【0008】取付部8eは、本実施形態をレンズ鏡筒の
フォーカス環3に設置するためのものであり、2つの挟
み込み部材8b、3つの固定部8cなどから構成されて
いる。挟み込み部材8bは、略半円形状の部材であり、
2つの挟み込み部材8bを合わせることにより、フォー
カス環3よりやや径の大きい略円環が得られる。2つの
挟み込み部材8bは、一端において支軸8dによって回
転可能に結合されている。これにより、2つの挟み込み
部材8bは、支軸8dを支点にして、左右に開閉するこ
とが可能である。
The mounting portion 8e is for mounting the present embodiment on the focus ring 3 of the lens barrel, and is composed of two sandwiching members 8b, three fixing portions 8c and the like. The sandwiching member 8b is a substantially semicircular member,
By combining the two sandwiching members 8b, a substantially circular ring having a slightly larger diameter than the focus ring 3 can be obtained. The two sandwiching members 8b are rotatably connected at one end by a support shaft 8d. Thereby, the two sandwiching members 8b can be opened and closed to the left and right with the support shaft 8d as a fulcrum.

【0009】また、挟み込み部材8bの支軸8dが配置
されているのと異なる方の端部には、ネジ孔8g及び孔
部8hが設けられており、ネジ部材9とともに本発明に
おける連結部材を構成している。すなわち、2つの挟み
込み部材8bが閉じ、略円環を形成しているときに、ネ
ジ部材9を孔部8hを介してネジ孔8gへネジ結合させ
ることにより、挟み込み部材8bは閉じた状態で固定さ
れる。なお、ネジ孔8gに重ねるように設置されている
規制部材11は、ネジ部材9が貫通することのできる孔
部を有する部材であり、ネジ部材9をネジ孔8gにねじ
込みすぎることにより、フォーカス環3が変形してしま
うことを防止するためのスペーサーである。
Further, a screw hole 8g and a hole portion 8h are provided at an end portion of the sandwiching member 8b, which is different from the position where the support shaft 8d is arranged, and the screw member 9 and the connecting member according to the present invention are provided. I am configuring. That is, when the two sandwiching members 8b are closed and form a substantially circular ring, the screwing member 9 is screwed into the screw hole 8g through the hole 8h, so that the sandwiching member 8b is fixed in the closed state. To be done. The restriction member 11 installed so as to overlap the screw hole 8g is a member having a hole through which the screw member 9 can penetrate, and by screwing the screw member 9 into the screw hole 8g too much, the focus ring 3 is a spacer for preventing the deformation of 3.

【0010】固定部8cは、フォーカス環3のローレッ
ト3a(図4参照)と直接当たる接触部であり、挟み込
み部材8bの内周面に、円周方向へ等間隔となるように
設置されている。固定部8cは、その内周面にローレッ
ト3aと噛み合う凹凸形状を有し、これにより、挟み込
み部材8bが閉じたときに本実施形態は、レンズ鏡筒の
フォーカス環3に、円周方向の滑りがない状態で確実に
固定される。従って、フォーカス環3が回転制限まで達
した後に、さらに本実施形態を回転させようとした場合
であっても、フォーカス環3と取付部8eは、相互に滑
ってずれることがない。
The fixed portion 8c is a contact portion that directly abuts against the knurl 3a (see FIG. 4) of the focus ring 3, and is installed on the inner peripheral surface of the sandwiching member 8b at equal intervals in the circumferential direction. . The fixed portion 8c has an uneven shape on its inner peripheral surface that meshes with the knurls 3a, so that when the sandwiching member 8b is closed, this embodiment allows the focus ring 3 of the lens barrel to slide in the circumferential direction. It is securely fixed in the absence of. Therefore, even if the present embodiment is intended to be further rotated after the focus ring 3 reaches the rotation limit, the focus ring 3 and the mounting portion 8e do not slip relative to each other.

【0011】延長部8fは、取付部8eより光軸前方
(被写体側)へ、三脚座4の近傍まで延びる円筒状部材
である。延長部8fは、レンズ鏡筒の外筒よりその径が
大であり、回転操作をした場合にレンズ鏡筒と摩擦接触
することがない。また、延長部8fは、その外周面にロ
ーレットを施されたゴムリング8aを備えている。ゴム
リング8aは、延長部8fを手動により回転操作する際
に、手の滑りを防止するためのものである。
The extension portion 8f is a cylindrical member that extends forward of the optical axis (toward the subject side) from the mounting portion 8e to the vicinity of the tripod seat 4. The diameter of the extension portion 8f is larger than that of the outer barrel of the lens barrel, and does not make frictional contact with the lens barrel when the rotating operation is performed. The extension portion 8f is provided with a rubber ring 8a having a knurled outer peripheral surface. The rubber ring 8a is for preventing the hand from slipping when the extension 8f is manually rotated.

【0012】本実施形態をレンズ鏡筒に取り付ける場合
は、まずネジ部材9をネジ孔8gよりはずし、挟み込み
部材8bを左右に開く。次に、レンズ鏡筒をカメラ本体
から取り外し、取付部1の方から本実施形態の延長部8
fに挿入する。取付部8eがフォーカス環3の位置まで
達したところで、固定部8cの凹凸形状とフォーカス環
3のローレット3aがかみ合うように挟み込み部材8b
を閉じる。最後に、ネジ部材9をネジ孔8gにねじ込む
ことにより、取付部8eをフォーカス環3に固定する。
When this embodiment is attached to the lens barrel, first, the screw member 9 is removed from the screw hole 8g, and the sandwiching member 8b is opened to the left and right. Next, the lens barrel is detached from the camera body, and the attachment portion 1 is extended to the extension portion 8 of the present embodiment.
Insert into f. When the mounting portion 8e reaches the position of the focus ring 3, the sandwiching member 8b is formed so that the uneven shape of the fixed portion 8c and the knurl 3a of the focus ring 3 engage with each other.
Close. Finally, the mounting member 8e is fixed to the focus ring 3 by screwing the screw member 9 into the screw hole 8g.

【0013】図1に示すように、本実施形態をレンズ鏡
筒に設置した場合は、撮影者が三脚座4の前方側におい
てレンズ鏡筒を保持する、すなわち、一脚使用時に最も
安定した状態でレンズ鏡筒を保持する場合であっても、
手の近傍に延長部8fがあることから、容易にフォーカ
ス環3の操作を行うことが可能となる。また、本実施形
態は、上述のようにレンズ鏡筒への着脱が極めて簡単で
あることから、三脚を用いる場合は、本実施形態を取り
外すことにより、従来と全く同様にレンズ鏡筒を取り扱
える。
As shown in FIG. 1, when this embodiment is installed in a lens barrel, the photographer holds the lens barrel in front of the tripod base 4, that is, the most stable state when using a monopod. Even when holding the lens barrel with
Since the extension 8f is provided near the hand, the focus ring 3 can be easily operated. Further, since the present embodiment is extremely easy to attach / detach to / from the lens barrel as described above, when the tripod is used, by removing the present embodiment, the lens barrel can be handled in exactly the same manner as the conventional one.

【0014】(その他の実施形態)なお、本発明は、上
記実施形態に限定されるものではない。上記実施形態
は、例示であり、本発明の特許請求の範囲に記載された
技術的思想と実質的に同一な構成を有し、同様な作用効
果を奏するものは、いかなるものであっても本発明の技
術的範囲に包含される。
(Other Embodiments) The present invention is not limited to the above embodiments. The above embodiment is an exemplification, and has substantially the same configuration as the technical idea described in the scope of the claims of the present invention. It is included in the technical scope of the invention.

【0015】例えば、上記実施形態では、固定部8cと
してフォーカス環3のローレット3aとかみ合う凹凸形
状を内周面に有する部材を用いているが、これは、フォ
ーカス環3と円周方向に滑りを生じないよう確実に固定
される部材であれば他のものであってもよく、たとえ
ば、適度な弾性及び厚みを有するゴムシート等の弾性部
材を用いることであってもよい。
For example, in the above embodiment, a member having an uneven surface on the inner peripheral surface that engages with the knurl 3a of the focus ring 3 is used as the fixed portion 8c. Other members may be used as long as they are securely fixed so as not to occur, and for example, an elastic member such as a rubber sheet having appropriate elasticity and thickness may be used.

【0016】[0016]

【発明の効果】以上詳しく説明したように、請求項1に
係る発明によれば、三脚座を有するレンズ鏡筒のフォー
カス環に本発明に係るフォーカス環アダプターを取り付
けることにより、一脚を取り付けたときのレンズ鏡筒の
操作性が向上するという効果が得られた。また、請求項
2に係る発明によれば、請求項1に係るフォーカス環ア
ダプターを容易にレンズ鏡筒へ着脱することが可能にな
るという効果が得られた。
As described in detail above, according to the first aspect of the invention, the monopod is attached by attaching the focus ring adapter of the present invention to the focus ring of the lens barrel having the tripod seat. The effect that the operability of the lens barrel at that time was improved was obtained. Further, according to the invention of claim 2, the effect that the focus ring adapter according to claim 1 can be easily attached to and detached from the lens barrel is obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係るフォーカス環アダプターの実施形
態がレンズ鏡筒に設置されているところを示す側面図で
ある。
FIG. 1 is a side view showing an embodiment of a focus ring adapter according to the present invention installed in a lens barrel.

【図2】本発明に係るフォーカス環アダプターの実施形
態における取り付け部の断面図である。
FIG. 2 is a sectional view of a mounting portion in the embodiment of the focus ring adapter according to the present invention.

【図3】本発明に係るフォーカス環アダプターを用いず
に、従来のレンズ鏡筒を三脚に設置して使用するときの
様子を示す側面図である。
FIG. 3 is a side view showing a state in which a conventional lens barrel is installed on a tripod and used without using the focus ring adapter according to the present invention.

【図4】図3に示した、従来のレンズ鏡筒に用いられて
いるフォーカス環の断面図である。
FIG. 4 is a sectional view of a focus ring used in the conventional lens barrel shown in FIG.

【図5】本発明に係るフォーカス環アダプターを用いず
に、従来のレンズ鏡筒を一脚に設置して使用するときの
様子を示す側面図である。
FIG. 5 is a side view showing a state in which a conventional lens barrel is installed on a monopod and used without using the focus ring adapter according to the present invention.

【符号の説明】[Explanation of symbols]

8b 挟み込み部材 8d 支軸 8e 取付部 8f 延長部 8g ネジ孔 8h 孔部 9 ネジ部材 8b Clamping member 8d Spindle 8e Mounting part 8f Extension part 8g Screw hole 8h Hole part 9 Screw member

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 三脚座よりカメラボディ側において、フ
ォーカス環を有する三脚座付きレンズ鏡筒のフォーカス
環アダプターであって、 前記フォーカス環に固定される取付部と、 前記レンズ鏡筒の外筒より大径であって、前記取付部よ
り光軸被写体側へ延びるフォーカス環延長部と、 を有することを特徴とするフォーカス環アダプター。
1. A focus ring adapter for a lens barrel with a tripod mount having a focus ring on the camera body side of the tripod mount, the mounting part being fixed to the focus ring, and being larger than the outer barrel of the lens barrel. A focus ring adapter having a diameter and a focus ring extension extending from the attachment to the subject side of the optical axis.
【請求項2】 請求項1に記載のフォーカス環アダプタ
ーにおいて、 前記取付部は、 2つの半円状部材と、 前記2つの半円状部材を一方の端部において回転可能に
結合する結合部材と、 前記2つの半円状部材の他方の端部を連結する連結部材
と、 を備え、 前記2つの半円状部材が、前記結合部材を支持点として
前記フォーカス環を外周側から挟み込み、前記連結部材
によって連結されることにより、前記フォーカス環に設
置される、 ことを特徴とするフォーカス環アダプター。
2. The focus ring adapter according to claim 1, wherein the mounting portion includes two semicircular members, and a coupling member that rotatably couples the two semicircular members at one end. A connecting member that connects the other ends of the two semi-circular members, the two semi-circular members sandwiching the focus ring from the outer peripheral side with the connecting member as a support point, and the connecting member A focus ring adapter, wherein the focus ring adapter is installed on the focus ring by being connected by a member.
JP7266953A 1995-10-16 1995-10-16 Focus ring adapter Pending JPH09113784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7266953A JPH09113784A (en) 1995-10-16 1995-10-16 Focus ring adapter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7266953A JPH09113784A (en) 1995-10-16 1995-10-16 Focus ring adapter

Publications (1)

Publication Number Publication Date
JPH09113784A true JPH09113784A (en) 1997-05-02

Family

ID=17437991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7266953A Pending JPH09113784A (en) 1995-10-16 1995-10-16 Focus ring adapter

Country Status (1)

Country Link
JP (1) JPH09113784A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012088607A (en) * 2010-10-21 2012-05-10 Canon Inc Adapter for optical accessory
JP2012247728A (en) * 2011-05-31 2012-12-13 Nikon Corp Lens barrel attachment apparatus
US20130230309A1 (en) * 2012-03-02 2013-09-05 Designport, Inc. Optical scope couplers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012088607A (en) * 2010-10-21 2012-05-10 Canon Inc Adapter for optical accessory
JP2012247728A (en) * 2011-05-31 2012-12-13 Nikon Corp Lens barrel attachment apparatus
US20130230309A1 (en) * 2012-03-02 2013-09-05 Designport, Inc. Optical scope couplers

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