| 摘要 |
<p>[Problem] To provide a compact and high-power zoom lens that achieves a low f-number and high optical performance that achieves high resolution. [Solution] This zoom lens is equipped with, in order from the object side, a first lens group (G1) having a positive refractive power; a second lens group (G2) having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group (G4) having a positive refractive power; and an aperture (St) positioned between the most image-side surface of the second lens group (G2), and the most image-side surface of the third lens group (G3). The interval of each lens group changes when zooming from the wide angle end to the telephoto end. The third lens group (G3) comprises, in order from the object side, a positive lens, a cemented lens comprising a positive lens and a negative lens, a negative meniscus lens that faces a concave surface on the object side, and a biconvex lens, and satisfies a predetermined conditional expression.</p> |
