| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a photographic lens capable of rapid automatic focusing, and suitable for a camera shake correction mechanism. <P>SOLUTION: A photographic lens includes: in order from an object side to an image side, a first lens group 11 with positive refractive power; a second lens group 12 with negative refractive power; a third lens group 13 with positive refractive power; a fourth lens group 15 with positive refractive power; a fifth lens group 15 with negative refractive power, which moves in a direction nearly vertical to an optical axis when camera shake correction is performed; and a sixth lens group 16 with positive refractive power. In focusing from an infinite object distance to a close distance, while the first lens group, the fifth lens group, and the sixth lens group, are fixed, the second lens group moves on the optical axis from the object side to an image surface side, the third lens group moves on the optical axis forward and backward, and the fourth lens group moves on the optical axis from the image surface side to the object side. The a first lens group has at least three or more convex lenses and at least one or more concave lens, the a third lens group has one convex lens, and the a fourth lens group has a set of cemented lenses. <P>COPYRIGHT: (C)2013,JPO&INPIT |
