Lens drive control apparatus for zoom lens system having a...

Details Lens drive control apparatus for zoom lens system having a... Lens drive control apparatus for zoom lens system having a...

2005-03-22

2005-03-22

Fuller, Rodney (Department: 2851)

Photography

Having variable focal length of camera objective

C359S683000, C359S689000

Reexamination Certificate

active

06871017

ABSTRACT:
A lens drive control apparatus for a camera having a zoom lens provided with variable lens groups, at least one of the variable lens groups including a switching lens group having two sub lens groups, wherein one of the two sub lens groups serves as a movable sub lens group. The lens drive control apparatus includes a main drive device for moving the plurality of variable lens groups; and a sub lens group drive device for moving the movable sub lens group within the switching lens group to be positioned at a movement extremity on the object side or the image side, with respect to the other sub lens group, in accordance with a zooming zone from the short focal length extremity to an intermediate focal length position, or a zooming zone from the intermediate focal length to the long focal length extremity.

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English Language Abstract of JP 4-340907.
English Language Abstract of JP 2000-275518.
English Language Abstract of JP 8-146296.

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