Patent ID: 10139606

Abstract:
A zoom lens includes, in order from an enlargement conjugate side to a reduction conjugate side, a first lens unit (B1) having a negative refractive power, a second lens unit (B2) having a positive refractive power, a third lens unit (B3) having a positive refractive power, a stop (sto), a fourth lens unit (B4) having a positive refractive power, a fifth lens unit (B5) having a negative refractive power, a sixth lens unit (B6) having a negative refractive power, and a seventh lens unit (B7) having a positive refractive power, and when zooming from a wide-angle end to a telephoto end, the second lens unit (B2), the third lens unit (B3), the fourth lens unit (B4), the fifth lens unit (B5), and the sixth lens unit (B6) move from the reduction conjugate side to the enlargement conjugate side while a space between adjacent lens units changes.