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.)
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo 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 Asahi Kogaku Kogyo Co LtdfiledCriticalAsahi Kogaku Kogyo Co Ltd
Priority to JP14912780ApriorityCriticalpatent/JPS5773713A/ja
Publication of JPS5773713ApublicationCriticalpatent/JPS5773713A/ja
Publication of JPS6119009B2publicationCriticalpatent/JPS6119009B2/ja
G02B15/00—Optical objectives with means for varying the magnification
G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
G02B15/10—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment
G02B15/12—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment by adding telescopic attachments
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Optics & Photonics
(AREA)
Lenses
(AREA)
JP14912780A1980-10-241980-10-24Rear conversion lens for astronomical telescope
GrantedJPS5773713A
(en)