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 JP7962182ApriorityCriticalpatent/JPS58196516A/ja
Publication of JPS58196516ApublicationCriticalpatent/JPS58196516A/ja
Publication of JPS6131446B2publicationCriticalpatent/JPS6131446B2/ja
G02B13/00—Optical objectives specially designed for the purposes specified below
G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length