| 摘要 |
The object is to provide a zoom lens system with an angle of view 2omega of about 74.1° to 11.8°, a zoom ratio of about 6.6, ultimately small in diameter and compact, being composed of less number of elements, and having high cost performance and superb optical performance. The system includes, in order from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, at least one lens group, and a lens group Gm having positive refractive power as a whole. Zooming is carried out by changing an air space between the first lens group and the second lens group. The lens group Gm consists of, in order from the object, a positive lens component having a convex surface facing to an image side and a negative lens component having a concave surface facing to the object side. Particular conditions are satisfied.
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