JPS55100519A - Photographic telephoto lens - Google Patents
Photographic telephoto lensInfo
- Publication number
- JPS55100519A JPS55100519A JP794079A JP794079A JPS55100519A JP S55100519 A JPS55100519 A JP S55100519A JP 794079 A JP794079 A JP 794079A JP 794079 A JP794079 A JP 794079A JP S55100519 A JPS55100519 A JP S55100519A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- negative
- positive
- lenses
- aberration
- 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
Links
Abstract
PURPOSE: To achieve larger aperture and better image quality by specifically arraying 5 groups and 6 elements of lenses.
CONSTITUTION: Five groups and six elements of lenses consisting of the front lens group composed of three single lenses being positive, negative and positive subsequently from the object side and composed of kinds of glass of fluorosilicate crown, borate quartz flintand dense phosphate crown and the rear lens group composed of a negative meniscus lens whose concave face is directed to the image side and a negative cemented lens of positive and negative are so arrayed that specifications A are satisfied when the focal length is standardized to f=100, r is let the radius of curvature, d the spacing between the lens faces, n the refractive index of the d line and ν the Abbe number. The cemented negative lens consisting the rear lens is moved in the optical axis direction, whereby focusing is done. Thereby, the larger aperture of the telescope lens may be achieved and the image quality of good chromatic aberration, spherical aberation, coma aberration, astigmatic aberration and distortion aberration obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP794079A JPS6015246B2 (en) | 1979-01-25 | 1979-01-25 | telephoto lens for photography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP794079A JPS6015246B2 (en) | 1979-01-25 | 1979-01-25 | telephoto lens for photography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55100519A true JPS55100519A (en) | 1980-07-31 |
| JPS6015246B2 JPS6015246B2 (en) | 1985-04-18 |
Family
ID=11679499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP794079A Expired JPS6015246B2 (en) | 1979-01-25 | 1979-01-25 | telephoto lens for photography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6015246B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5878423U (en) * | 1981-11-21 | 1983-05-27 | ダイキン工業株式会社 | ventilation system |
| US5257136A (en) * | 1991-12-23 | 1993-10-26 | International Business Machines Corporation | Reverse telephoto agron objective lens |
| JP2019095749A (en) * | 2017-11-18 | 2019-06-20 | エーエーシー テクノロジーズ ピーティーイー リミテッドＡａｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｐｔｅ．Ｌｔｄ． | Image capturing optical lens |
| JP2022160964A (en) * | 2021-04-07 | 2022-10-20 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッド | Lens system, image capturing device, and mobile body |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62284749A (en) * | 1986-06-03 | 1987-12-10 | Canon Inc | Ink jet printer |
-
1979
- 1979-01-25 JP JP794079A patent/JPS6015246B2/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5878423U (en) * | 1981-11-21 | 1983-05-27 | ダイキン工業株式会社 | ventilation system |
| US5257136A (en) * | 1991-12-23 | 1993-10-26 | International Business Machines Corporation | Reverse telephoto agron objective lens |
| JP2019095749A (en) * | 2017-11-18 | 2019-06-20 | エーエーシー テクノロジーズ ピーティーイー リミテッドＡａｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｐｔｅ．Ｌｔｄ． | Image capturing optical lens |
| JP2022160964A (en) * | 2021-04-07 | 2022-10-20 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッド | Lens system, image capturing device, and mobile body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6015246B2 (en) | 1985-04-18 |
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