| 摘要 |
A zoom lens with a slim and compact design has arranged in sequence from the object side to the image plane side a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power. The first lens group is formed from a first lens having a negative refractive power and a second lens having a positive refractive power. The second lens group is formed from a third lens having a positive refractive power and a fourth lens and a fifth lens. The fourth and fifth lens are joined together and have a negative refractive power. The third lens group is formed from a sixth lens having a positive refractive power. The zoom lens has a short length when retracted and extended, and a design that is compact and thin.
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