Zoom lens, an optical apparatus, and a manufacturing method of the zoom lens

A manufacturing method of a zoom lens, comprising:

• disposing in a lens barrel, in order on an optical axis from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having negative refractive power, and a fifth lens group having positive refractive power, such that each distance between adjacent lens groups changes when zooming,
• the first lens group consisting of two lenses, and
• the method comprising at least one of the following features (A), (B) and (C):
• (A) disposing the third lens group and the fifth lens group such that a distance between the third lens group and the fifth lens group changes when zooming, and satisfying the following conditional expression:
• 0.07<D1/fw<0.46
• where D1 denotes a thickness on the optical axis of the first lens group, and fw denotes a focal length of the zoom lens in a wide-angle end state,
• (B) disposing an aperture stop between the second lens group and the third lens group, and satisfying the following conditional expression:
• 0.07<D1/fw<0.46
• where D1 denotes a thickness on the optical axis of the first lens group, and fw denotes a focal length of the zoom lens in wide-angle end state,
• (C) satisfying the following conditional expression:
• 0.07<D1/fw≤0.365
• where D1 denotes a thickness on the optical axis of the first lens group, and fw denotes a focal length of the zoom lens in a wide-angle end state.

A zoom lens comprising, in order on an optical axis from an object, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, and a fifth lens group having a positive refractive power, each distance between adjacent lens groups changing when zooming,

• an aperture stop being disposed between the second lens group and the third lens group,
• the first lens group consisting of two lenses, and
• the following conditional expression being satisfied:
• 0.07<D1/fw<0.46
• where D1 denotes a thickness on the optical axis of the first lens group, and
• fw denotes a focal length of the zoom lens in a wide-angle end state.

A zoom lens comprising, in order on an optical axis from an object, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, and a fifth lens group having a positive refractive power, each distance between adjacent lens groups changing when zooming,

• the first lens group consisting of two lenses, and
• the following conditional expression being satisfied:
• 0.07<D1/fw≤0.365
• where D1 denotes a thickness on the optical axis of the first lens group, and
• fw denotes a focal length of the zoom lens in a wide-angle end state.