Title:
REAR GROUP INTERCHANGEABLE TYPE VARIABLE POWER LENS
Document Type and Number:
Japanese Patent JPS60170815
Kind Code:
A
Abstract:
PURPOSE: To reduce aberration variation and change focal length easily by providing two groups, i.e. front group and rear group, and interchanging the rear groups.
CONSTITUTION: Rear-group image formation power is varied by replacing rear groups II and II' with each other. For the purpose, the rear groups II and II' which are different in focal length are provided and used selectively at requests for wide-angle and telephoto shooting to obtain different focal lengths, and the aberrations are compensated independently in the respective states.
Inventors:
TAKASE HIROSHI
IMAIZUMI MASAKI
FUJII KIYOSHI
IMAIZUMI MASAKI
FUJII KIYOSHI
Application Number:
JP2607384A
Publication Date:
September 04, 1985
Filing Date:
February 16, 1984
Export Citation:
Assignee:
OLYMPUS OPTICAL CO
International Classes:
G02B15/08; G02B15/02; (IPC1-7): G02B15/08
Attorney, Agent or Firm:
Kanji Mukai