| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a zoom lens advantageous to simultaneous pursuit of down-sizing and upgrading of performance. <P>SOLUTION: The zoom lens according to the present invention includes a macro mode capable of setting to either a first mode allowing zooming and focusing including infinity or a second mode allowing obtaining a photographic magnification absolute value greater than 0.25 times. The zoom lens includes: a lens group A having a positive refractive power; a lens group B having a negative refractive power and arranged at an image side relative to the lens group A so as to be neighbored by the lens group A with an interval of air interposed between them; a focusing lens group having a negative refractive power and arranged at the object side relative to the lens group A so as to be movable in the direction of the optical axis in a focusing operation; and an object side lens group having a negative refractive power and arranged at the object side relative to the focus lens group so as to change the distance between itself and the focus lens group at the time of the focusing operation. <P>COPYRIGHT: (C)2013,JPO&INPIT |
