Blur preventing device for an anticipating drive auto-focus came

Details Blur preventing device for an anticipating drive auto-focus came Blur preventing device for an anticipating drive auto-focus came

1995-12-18

1997-08-19

Metjahic, Safet

Photography

With exposure objective focusing means, focusing aid, or...

Having pursuit mode

396242, 396263, 396358, G03B 1336, G03B 1912

Patent

active

056598114

ABSTRACT:
In the blur prevention mode, which prevents photographic blurring caused by the vibration of the camera body which occurs when the mirrors are elevated, an anticipated drive quantity required for focusing the taking lens on a moving photographic subject at the time of exposure is calculated based on the results of distance measurement and a drive quantity equivalent to the distance traveled by the image surface of the moving photographic subject during the time T by which the exposure operation is delayed after mirror elevation is also calculated based on the results of distance measurement to be added to the anticipated drive quantity. The taking lens is driven in the amount of the total drive quantity that is the result of this addition. At the same time, the mirrors are elevated and then exposure is performed when the delay time T has elapsed after the mirrors are fully elevated.

REFERENCES:
patent: 5092673 (1992-03-01), Hayashi
patent: 5321459 (1994-06-01), Venaka

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