| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a zoom lens reducing ghost and flare, and having a high imaging performance and a wide angle field, an imaging apparatus, and a method for manufacturing zoom lenses. <P>SOLUTION: The zoom lens includes, in order from an object side, a front group Gn having negative refractive power, and a rear group Gp having positive refractive power. The rear group Gp includes, in order from the object side: a positive lens La; a negative lens Lb having a concave surface facing the object side; a cemented positive lens Lc formed of a negative lens and a positive lens; and a cemented lens Ld formed of a positive lens and a negative lens. The rear group Gp further includes a focusing lens group Gf disposed to the object side of the positive lens La for focusing from an infinity object to a close object by moving from the object side to an image side. The zoom lens varies the power by changing an air interval between the front group Gn and the rear group Gp, satisfies predetermined conditional expressions, and includes an antireflection film at least including a single layer formed by using a wet process on at least one surface of optical surfaces of the front group Gn. <P>COPYRIGHT: (C)2013,JPO&INPIT |
