摘要 |
<p>A variable magnification optical system ZL has, in order from the object side, a first lens unit G1 with a positive refractive power, a second lens unit G2 with a negative refractive power, a third lens unit G3 with a positive refractive power, a fourth lens unit G4, and a fifth lens unit G5 with a positive refractive power, and is configured to satisfy conditions of the following expressions: 2.49 < f �¢ 4 / f �¢ 5 < 4.69 ;
and - 0.10 < ² �¢ 5 �¢ w < 0.085 ,
where f4 is a focal length of the fourth lens unit, f5 is a focal length of the fifth lens unit, and ²5w is a lateral magnification of the fifth lens unit in the wide-angle end state.</p> |