Zoom lens and imaging apparatus using zoom lens

A zoom lens comprising, as arranged sequentially from an object 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;
• and
• a fifth lens group having a positive refractive power,
• wherein at least four lens groups including the first lens group, the second lens group, the third lens group, and the fourth lens group independently move along an optical axis to implement zooming,
• at least part of a lens group of the fourth lens group moves along a direction perpendicular to the optical axis to displace an image;
• and
• wherein, when a surface spaces between the third lens group and the fourth lens group on the optical axis at the wide angle end and the telephoto end are taken T34w and T34t, respectively, the zoom lens satisfies the following condition:
• 2.0<T34w/T34t<7.0.

A zoom lens comprising, as arranged sequentially from an object 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;
• and
• a fifth lens group having a positive refractive power,
• wherein at least four lens groups including the first lens group, the second lens group, the third lens group, and the fourth lens group independently move along an optical axis to implement zooming,
• at least part of a lens group of the fourth lens group moves along a direction perpendicular to the optical axis to displace an image;
• and
• wherein, when the composite focal lengths of the third lens group and the fourth lens group at the wide angle end and the telephoto end are f34w and f34t, respectively;
• the focal length of the third lens group is f3;
• the focal length of the fourth lens group is f4;
• and the focal length of the overall system of the zoom lens at the wide angle end and the telephoto end are fw and ft, respectively, the zoom lens satisfies the following conditions:
• 2.7<f34w/fw<4.0
• 0.15<f34t/ft<0.36
• 3.3<f3/fw <5.5
• 0.2<f4/ft<0.6.

A zoom lens comprising, as arranged sequentially from an object 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;
• and
• a fifth lens group having a positive refractive power,
• wherein at least four lens groups including the first lens group, the second lens group, the third lens group, and the fourth lens group independently move along an optical axis to implement zooming,
• at least part of a lens group of the fourth lens group moves along a direction perpendicular to the optical axis to displace an image;
• and
• wherein, when the focal length of the first lens group is f1, the focal length of the second lens group is f2, and the focal lengths of the overall system at the wide angle end and the telephoto end are fw and ft, respectively, the zoom lens satisfies the following conditions:
• 6.7<f1/fw<14.0
• 0.08<|f2/ft |0.16.

A zoom lens comprising, as arranged sequentially from an object 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;
• and
• a fifth lens group having a positive refractive power,
• wherein at least four lens groups including the first lens group, the second lens group, the third lens group, and the fourth lens group independently move along an optical axis to implement zooming,
• at least part of a lens group of the fourth lens group moves along a direction perpendicular to the optical axis to displace an image;
• and
• wherein, when the lens face of the fourth lens group positioned nearest to the image plane has a convex shape facing the image plane, the radius of curvature of the lens face is Ra, and the focal length of the overall system is fw at the wide angle end, the zoom lens satisfies the following condition:
• |Ra/fw|>5.5.

A zoom lens comprising, as arranged sequentially from an object 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;
• and
• a fifth lens group having a positive refractive power,
• wherein at least four lens group, including the first lens group, the second lens group, the third lens group, and the fourth lens group independently move along an optical axis to implement zooming,
• at least part of a lens group of the fourth lens group moves along a direction perpendicular to the optical axis to displace an image;
• and
• the fourth lens group is constituted by a cemented lens in which a negative meniscus lens with its convex surface facing the object side and a biconvex lens having a positive refractive power are sequentially arranged in that order from the object side and joined together.

A zoom lens comprising, as arranged sequentially from an object 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;
• and
• a fifth lens group having a positive refractive power,
• wherein at least four lens groups including the first lens group, the second lens group, the third lens group, and the fourth lens group independently move along an optical axis to implement zooming,
• at least part of a lens group of the fourth lens group moves along a direction perpendicular to the optical axis to displace an image;
• and
• wherein, when the fifth lens group is moved to focus, the focal length of the fifth lens group is f5, and the focal length of the entire system at the telephoto end is ft, the zoom lens satisfies the following condition:
• 0.24<f5/ft<0.80.

A zoom lens comprising, as arranged sequentially from an object 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;
• and
• a fifth lens group having a positive refractive power,
• wherein at least four lens groups including the first lens group, the second lens group, the third lens group, and the fourth lens group independently move along an optical axis to implement zooming,
• at least part of a lens group of the fourth lens group moves along a direction perpendicular to the optical axis to displace an image;
• and
• each of the second lens group and the third lens group comprises at least one aspherical lens.