Zoom lens, optical apparatus and method for manufacturing zoom lens
AssigneeNikon Corporation
InventorDaisaku Arai
Life of this patent
Estimating the term…
Abstract
A zoom lens ZL including an optical element P for deflecting an optical path, including, in order from an object: 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 positive refractive power; a fifth lens group G5 having negative refractive power; and a sixth lens group G6, wherein a conditional expression 0.10<fw/PL<0.45 is satisfied, where fw denotes a focal length of the zoom lens ZL in a wide-angle end state, and PL denotes an optical path length of the optical element P for deflecting the optical path.
Claims14
A zoom lens including an optical element for deflecting an optical path, comprising, in order 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 positive refractive power;
- a fifth lens group having negative refractive power;
- and a sixth lens group, and
- a following conditional expression being satisfied:
- 0.10<fw/PL<0.45
- where fw denotes a focal length of the zoom lens in a wide-angle end state, and PL denotes an optical path length of the optical element for deflecting the optical path.
A method for manufacturing a zoom lens including an optical element for deflecting an optical path, said method comprising:
- providing, in order from an object:
- a first lens group including the optical element for deflecting the optical path and 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 positive refractive power;
- a fifth lens group having negative refractive power;
- and a sixth lens group,
- with the following conditional expression being satisfied:
- 0.10<fw/PL<0.45
- where fw denotes a focal length of the zoom lens in a wide-angle end state, and PL denotes an optical path length of the optical element for deflecting the optical path.
Dependencies are inferred from the claim text.