| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a zoom lens capable of reducing occurrence of chromatic aberration of magnification and further correcting chromatic aberration of magnification and axial color aberration at the same time. <P>SOLUTION: A zoom lens 100 comprises: a fist refractive power variable face 101b arranged on the object side of a diaphragm 103; a second refractive power various face 105b arranged on the image face side of the diaphragm 103 for causing chromatic aberration of magnification, which has a symbol same as a symbol of the first refractive power variable face 101b; and a third refractive power variable face 105a for causing chromatic aberration of magnification, which has a symbol different from symbols of the first and second refractive power variable faces 101b and 105b. In a case where the third refractive power variable face 105a is arranged on the object side of the diaphragm 103, the chromatic aberration of magnification at the wide angle end of the first refractive power variable face 101b is LAT<SB POS="POST">1</SB>or where the third refractive power various face 105a is arranged on the image face side of the diaphragm 103, a chromatic aberration of magnification at the wide angle end of the second refractive power various face 105b is LAT<SB POS="POST">1</SB>, and the chromatic aberration of magnification at the wide angle end of the third refractive power various face 105a is LAT<SB POS="POST">2</SB>, a condition expressed by ¾LAT<SB POS="POST">1</SB>¾<¾LAT<SB POS="POST">2</SB>¾ is satisfied. <P>COPYRIGHT: (C)2012,JPO&INPIT |
