| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens that can satisfactorily correct aberrations from a wide angle end to a telephoto end and can form high-definition images.SOLUTION: A zoom lens has, in order from an enlargement conjugate side to a reduction conjugate side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a positive refractive power, a diaphragm, a fourth lens group having a positive refractive power, a fifth lens group having a negative refractive power, a sixth lens group having a negative refractive power, and a seventh lens group having a positive refractive power. During zooming, the second lens group, the third lens group, the fourth lens group, the fifth lens group, and the sixth lens group move from the reduction conjugate side to the enlargement conjugate side while changing intervals from each other.SELECTED DRAWING: Figure 1 |
