The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 1999
Filed:
May. 31, 1996
Yoshinari Hamanishi, Ohtawara, JP;
Kenzabro Suzuki, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A high performance zoom lens with a high zoom ratio is suitable for a wide range of uses. The zoom lens includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, and the fifth lens group having a positive refractive power. A magnification of the second lens group, a magnification of the third lens group and a magnification of the fourth lens group almost simultaneously attain near equal magnification. The zoom lens system satisfies at least one predetermined condition.