Title:
EXTENDER LENS
Document Type and Number:
Japanese Patent JPS6433519
Kind Code:
A
Abstract:
PURPOSE:To always photograph an image without generating blurring even when a master lens is exchanged, by providing a focal distance detecting means for the master lens, and deciding a blurring compensation quantity to be supplied to an image formation stabilizing optical system corresponding to the focal distance of the master lens. CONSTITUTION:A blurring preventing device is constituted in such a way that the image formation stabilizing optical system 4 which conpensates the blurring in a direction perpendicular to an optical axis is housed by being moved in the direction perpendicular to the optical axis, and also, an actuator 8 to drive the image formation stabilizing optical system 4 in the direction perpendicular to the optical axis, a blurring detector 5 to detect vibration such as hand- shaking, etc., the focal distance detecting means 6 to detect the focal distance of the master lens 1, and a control means 7 to control the output of the actuator 8 corresponding to the output of the blurring detector 5 and that of the focal distance detecting means 6 are incorporated. In such a way, it is possible to compensate the blurring on a film plane.
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Inventors:
KASHIWAGI NAOKI
Application Number:
JP18952287A
Publication Date:
February 03, 1989
Filing Date:
July 29, 1987
Export Citation:
Assignee:
CANON KK
International Classes:
G02B15/12; G02B27/64; (IPC1-7): G02B15/12; G02B27/64
Attorney, Agent or Firm:
Teruo Taniyama