Zoom lens system
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United States of America Patent
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-
Mar 21, 2006
Grant Date -
Mar 3, 2005
app pub date -
Aug 31, 2004
filing date -
Sep 1, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group. Upon zooming from the short focal length extremity to the long focal length extremity, a distance between the first lens group and the second lens group decreases, and a distance between the second lens group and the third lens group increases. When zooming is being performed, the third lens group remains stationary, and the first lens group and the second lens group are moveable along the optical axis of the zoom lens system; and the zoom lens system satisfies the following conditions:
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