| 摘要 |
A zooming lens apparatus including a first optical lens group having a positive refractive power, a second optical lens group having a negative refractive power, a third optical lens group having a positive refractive power, and a fourth optical lens group having a positive refractive power. The zooming lens apparatus also includes an aperture diaphragm arranged between the second and third optical lens group. When a scaling of the zooming lens system is changed from a wide-angle limit to a telescopic limit, the first optical lens group and the third optical lens group are moved in a first direction, and the fourth optical lens group is moved in a second direction opposite of the first direction. The zooming lens apparatus satisfies an inequality condition 0.60<M<SUB>4T</SUB><0.85, WHERE M<SUB>4T </SUB>represents an imaging magnification of the fourth optical lens group at the telescopic limit.
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