Zoom lens and imaging apparatus
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United States of America Patent
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Oct 13, 2009
Grant Date -
Jan 29, 2009
app pub date -
Jul 3, 2008
filing date -
Jul 23, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A zoom lens is provided and includes: in order from the object side, a first lens group having a positive power and including in order from the object side, a negative lens, a reflecting member that bends an optical path by substantially 90°, and a positive lens having biconvex shape which has at least one aspherical surface; a second lens group having a negative power and including two lenses; a third lens group having a positive power; and a fourth lens group having a positive power and including in order from the object side, a cemented lens having a negative power and a positive lens having a meniscus shape which has at least one aspherical surface and a convex surface on the object side. The zoom lens is adapted to change a magnification thereof by moving the second lens group and forth lens group, and satisfies specific conditional equations.
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