| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a variable power optical system and an optical device having the variable power optical system, which restrain aberration variation and have a high optical performance, and to provide a method for manufacturing the variable power optical system. <P>SOLUTION: The variable power optical system includes, in order from an object side along an optical axis, a first lens group G1 of positive refractive power, a second lens group G2 of negative refractive power, and a third lens group G3 of positive refractive power. In the variable power optical system, an aperture stop S is provided on an image side from the second lens group G2, and when varying power from a wide angle end state W to a telephoto end state T, the interval between the first and second lens groups G1 and G2 increases, the interval between the second and third lens groups G2 and G3 decreases, and predetermined conditional expressions are satisfied. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
