Zoom lens and imaging apparatus
AssigneeFUJIFILM Corporation
InventorsTaiga Noda, Ryosuke Nagami
Life of this patent
Estimating the term…
Abstract
A zoom lens consists of, in order from an object side to an image side: 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 positive refractive power; a fifth lens group having a negative refractive power; and a sixth lens group having a positive refractive power. During zooming from the wide angle end to the telephoto end, the distance between the adjacent lens groups in the optical axis direction changes, and the third lens group and the fifth lens group move integrally along the optical axis.
Claims19
A zoom lens consisting of, in order from an object side to an image side:
- 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 positive refractive power;
- a fifth lens group having a negative refractive power;
- and a sixth lens group having a positive refractive power,
- wherein during zooming from a wide angle end to a telephoto end, the third lens group and the fifth lens group move integrally along an optical axis and distances between adjacent lens groups in an optical axis direction change, and
- assuming that
- a focal length of the sixth lens group is f6, and
- a focal length of the first lens group is f1,
- Conditional Expression (5) is satisfied, which is represented by
- 0.25<f6/f1<1 (5).
A zoom lens consisting of, in order from an object side to an image side:
- 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 positive refractive power;
- a fifth lens group having a negative refractive power;
- and a sixth lens group having a positive refractive power,
- wherein during zooming from a wide angle end to a telephoto end, the third lens group and the fifth lens group move integrally along an optical axis and distances between adjacent lens groups in an optical axis direction change, and
- the fifth lens group consists of two negative lenses and one positive lens.
A zoom lens consisting of, in order from an object side to an image side:
- 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 positive refractive power;
- a fifth lens group having a negative refractive power;
- and a sixth lens group having a positive refractive power,
- wherein during zooming from a wide angle end to a telephoto end, the third lens group and the fifth lens group move integrally along an optical axis and distances between adjacent lens groups in an optical axis direction change, and
- all lens surfaces of the sixth lens group have a shape convex toward the image side.
Dependencies are inferred from the claim text.