| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a zoom lens, optical device and manufacturing method of the zoom lens that have excellent optical performance even with a high magnification.SOLUTION: A zoom lens includes, arranged in order from an object side along an optical axis,: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; a third lens group G3 having positive refractive power; a fourth lens group G4 having negative refractive power; and a fifth lens group G5 having positive refractive power. Upon magnifying from a wide-angle end state to a telephoto-end state, the first lens group G1 to the fifth G5 respectively move along the optical axis so that an interval between the first lens group G1 and the second lens group G2 increases, an interval between the second lens group G2 and the third lens group G3 decreases, an interval between the third lens group G3 and the fourth lens group G4 varies and an interval between the fourth lens group G4 and the fifth lens group G5 varies. Once the fifth lens group G5 moves to the object side, and then, the fifth lens group G5 moves to an image side, and the zoom lens satisfies a conditional expression 0.050<f3/ft<0.075.</p> |
