JPH0442618U - - Google Patents
Info
- Publication number
- JPH0442618U JPH0442618U JP8358990U JP8358990U JPH0442618U JP H0442618 U JPH0442618 U JP H0442618U JP 8358990 U JP8358990 U JP 8358990U JP 8358990 U JP8358990 U JP 8358990U JP H0442618 U JPH0442618 U JP H0442618U
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- group
- negative lens
- zoom
- during
- 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
- 238000010586 diagram Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Description
第１図は、本考案に係る２群構成のズームレン
ズの全体構成を示す概略構成図、第２図は、リア
フオーカシング方式を採る正・負配列の２群ズー
ムレンズの特徴を説明するための作用説明図、第
３図は、第２図に示す２群構成のズームレンズの
マクロ撮影時における後群レンズ群の移動制限の
一例を示す作用説明図である。第４図は、マクロ
撮影時における前群レンズ群の移動制限の他の例
を示す作用説明図である。
Ｌ１……前群レンズ群、Ｌ２……後群レンズ群
、１……ズームレンズの鏡胴、２……第１リード
ねじ、３……第１リードねじギア、５……駆動出
力ギア、６……旋回阻止バー、ＭＺ……ズームモ
ータ、１０……前群保持枠、１１……第１雌ねじ
カアラー、１２……第２リードねじ、１３……第
２リードねじギア、１４……アイドルギア、１５
……駆動出力ギア、ＭＦ……フオーカスモータ、
１６，１７……回転数検出手段、１６……エンコ
ーダ羽根、１６ａ……スリツト列、１７……フオ
トカプラー、１７ａ……光電的検出部、１８……
後群保持枠、１９……第２雌ねじカラー、２１…
…前群位置検出用パターン基板、２２……ＭＲ素
子、２３……フオーカス位置検出用基板、２３ａ
……導電スイツチパターン、２４……摺動ブラシ
、３１……前群枠位置検知回路、３２……ズーム
スイツチ、３３……シヤツタレリーズスイツチ、
３４……制御回路、３５……記憶手段、３６……
自動測距装置、ｆＴ……望遠画角端ライン、ｆＷ
……広画角端ライン、ｆｉ……マクロ撮影限界画
角のライン。
Figure 1 is a schematic configuration diagram showing the overall configuration of a two-group zoom lens according to the present invention, and Figure 2 explains the characteristics of a positive/negative array two-group zoom lens that uses a rear focusing method. FIG. 3 is an explanatory diagram showing an example of movement restriction of the rear lens group during macro photography of the two-group zoom lens shown in FIG. FIG. 4 is an explanatory diagram showing another example of restricting movement of the front lens group during macro photography. L1 ...front lens group, L2 ...rear lens group, 1...zoom lens barrel, 2...first lead screw, 3...first lead screw gear, 5...drive output gear , 6... Turning prevention bar, MZ... Zoom motor, 10... Front group holding frame, 11... First female threaded collar, 12... Second lead screw, 13... Second lead screw gear, 14... Idol gear, 15
...Drive output gear, MF...Focus motor,
16, 17... Rotation speed detection means, 16... Encoder blade, 16a... Slit row, 17... Photo coupler, 17a... Photoelectric detection section, 18...
Rear group holding frame, 19...Second female screw collar, 21...
...Front group position detection pattern board, 22...MR element, 23...Focus position detection board, 23a
... Conductive switch pattern, 24 ... Sliding brush, 31 ... Front group frame position detection circuit, 32 ... Zoom switch, 33 ... Shutter release switch,
34...Control circuit, 35...Storage means, 36...
Automatic distance measuring device, fT... Telephoto angle of view edge line, fW
. . . Wide angle of view end line, f i . . . Line of the limit angle of view for macro photography.
Claims (1)
ズ群とを被写界側から順次に配列し、且つ、リア
フオーカシング方式を採用する２群構成のズーム
レンズにおいて、通常撮影時におけるズーム範囲
を、その広画角端でマクロ撮影時におけるズーム
は範囲よりも、さらに広画角に設定して成ること
を特徴とする２群構成のズームレンズ。 (2) マクロ撮影時における最も広画角での最至
近距離を実現し得る前記負レンズ群の位置を、負
レンズ群が最もフイルム面に近接し得る最大移動
位置に設定すると共に、マクロ撮影時の前記正レ
ンズ群の広画角方向への移動量を、負レンズ群の
最大移動位置に対応したズーミング時の位置に制
限し、フオーカシング時における前記負レンズ群
の移動線図を、通常撮影時におけるフオーカシン
グの移動線図からマクロ撮影時におけるフオーカ
シングの移動線図に変更するように構成して成る
請求項１に記載の２群構成のズームレンズ。 (3) マクロ撮影時における最も広画角での最至
近距離を実現し得る負レンズ群の位置を、前記負
レンズ群の最大移動位置に設定すると共に、この
最大移動位置を、通常撮影時における広画角端で
の最至近距離を実現し得る負レンズ群の移動位置
と実質的に同一の位置に設定して成る請求項１ま
たは２に記載の２群構成のズームレンズ。 (4) マクロ撮影の際に、前記正レンズ群を、通
常撮影時における全ズーム範囲に亘つて移動可能
に構成し、広画角端近傍においては、前記正レン
ズ群を一旦望遠画角端方向に移動させ、その後に
前記負レンズ群を移動させるレンズ群のように構
成して成る請求項３に記載の２群構成のズームレ
ンズ。[Claims for Utility Model Registration] (1) Two groups in which a positive lens group as a front group and a negative lens group as a rear group are arranged sequentially from the object side, and a rear focusing method is adopted. A zoom lens with a two-group configuration, characterized in that the zoom range during normal shooting is set to a wider angle of view than the zoom range during macro shooting at its wide angle end. . (2) The position of the negative lens group that can achieve the closest distance at the widest angle of view during macro photography is set to the maximum movement position where the negative lens group can be closest to the film surface, and The amount of movement of the positive lens group in the wide angle of view direction is limited to the position during zooming corresponding to the maximum movement position of the negative lens group, and the movement diagram of the negative lens group during focusing is changed to the position during normal shooting. 2. The two-group zoom lens according to claim 1, wherein the focusing movement diagram is changed from a focusing movement diagram during macro photography to a focusing movement diagram during macro photography. (3) The position of the negative lens group that can achieve the closest distance at the widest angle of view during macro photography is set as the maximum movement position of the negative lens group, and this maximum movement position is 3. The two-group zoom lens according to claim 1, wherein the zoom lens is set at substantially the same position as the moving position of the negative lens group that can realize the closest distance at the wide-angle end. (4) During macro photography, the positive lens group is configured to be movable over the entire zoom range during normal photography, and near the wide angle end, the positive lens group is temporarily moved toward the telephoto angle end. 4. The two-group zoom lens according to claim 3, wherein the zoom lens is configured such that the negative lens group is moved after that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8358990U JPH0442618U (en) | 1990-08-09 | 1990-08-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8358990U JPH0442618U (en) | 1990-08-09 | 1990-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0442618U true JPH0442618U (en) | 1992-04-10 |
Family
ID=31631381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8358990U Pending JPH0442618U (en) | 1990-08-09 | 1990-08-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442618U (en) |
-
1990
- 1990-08-09 JP JP8358990U patent/JPH0442618U/ja active Pending
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