| 摘要 |
PROBLEM TO BE SOLVED: To excellently compensate aberration in the state of camera-shake correction by moving a camera-shake correcting group in the direction perpendicular to the optical axis at the time of focusing from infinity to a close range and specifying a photographing magnification in the focusing state at the closest distance. SOLUTION: This lens is composed, in order from the object side, of a first lens group Gr1 having a positive refractive power, a second lens group Gr2 having a negative refractive power and a third lens group Gr3 having a positive refractive power. By moving a fifth lens L5 and a sixth lens L6, both being a part of the second lens group Gr2, in the direction perpendicular to the optical axis, camera-shake is corrected. Namely, the fifth lens L5 and the sixth lens L6 are equivalent to a camera-shake correcting group. At the time of focusing from infinity to a close range, by moving the first lens group Gr1 together with the second lens group Gr2 to the object side and moving the camera-shake correcting group in the direction perpendicular to the optical axis, the camera- shake is corrected. A photographing magnificationβmax in the focusing state at the closest distance is made to satisfy 0.25<|βmax|.
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