Abstract: An imaging device (10) is configured by being provided with an image pickup element (40) where an imaging surface (41) having a concave surface facing an object side is formed, an imaging optical system (20) which forms an image on the imaging surface (41) in a range smaller than the imaging surface (41), and an oscillating drive section (30) which oscillating-drives the imaging optical system (20) so that a direction of an optical axis Z of the imaging optical system changes. The imaging element (40) captures a first formed by the imaging optical system (20) with a direction of the optical axis Z set to a first direction and a 2nd formed by the imaging optical system (20) with a direction of the optical axis Z set to a 2nd direction, in different regions in the imaging surfaces (41).

Abstract: Provided is a zoom lens having, 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, and a fourth lens group (G4) having positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group and the second lens group changes, a distance between the second lens group and the third lens group changes, a distance between the third lens group and the fourth lens group changes, and at least the first lens group (G1) moves. The first lens group (G1) is constituted by a set of cemented lenses, the third lens group (G3) is constituted by, in order from the object, a positive lens and a negative lens, and the conditional expression 0.50<TL/ft<1.

Abstract: Provided is a zoom lens (ZL) which includes, in order from an object, a first lens group (G1) having negative refractive power, and a second lens group (G2) having positive refractive power, and which satisfies the following conditional expression (1): 1.90<ft/Gf2<3.50??(1), where ft denotes a focal length of the zoom lens (ZL) in the telephoto end state, and Gf2 denotes a focal length of the second lens group (G2).

Abstract: Provided is a zoom lens having, 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, and a fourth lens group (G4) having positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group and the second lens group changes, a distance between the second lens group and the third lens group changes, a distance between the third lens group and the fourth lens group changes, and at least the first lens group (G1) moves. The first lens group (G1) is constituted by a set of cemented lenses, the third lens group (G3) is constituted by, in order from the object, a positive lens and a negative lens, and the conditional expression 0.50<TL/ft<1.

Abstract: An imaging device (10) is configured by being provided with an image pickup element (40) where an imaging surface (41) having a concave surface facing an object side is formed, an imaging optical system (20) which forms an image on the imaging surface (41) in a range smaller than the imaging surface (41), and an oscillating drive section (30) which oscillating-drives the imaging optical system (20) so that a direction of an optical axis Z of the imaging optical system changes. The imaging element (40) captures a first formed by the imaging optical system (20) with a direction of the optical axis Z set to a first direction and a 2nd formed by the imaging optical system (20) with a direction of the optical axis Z set to a 2nd direction, in different regions in the imaging surfaces (41).

Abstract: Provided is a zoom lens having, 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, and a fourth lens group (G4) having positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group and the second lens group changes, a distance between the second lens group and the third lens group changes, a distance between the third lens group and the fourth lens group changes, and at least the first lens group (G1) moves. The first lens group (G1) is constituted by a set of cemented lenses, the third lens group (G3) is constituted by, in order from the object, a positive lens and a negative lens, and the conditional expression 0.50<TL/ft<1.

Abstract: Provided is a zoom lens (ZL) which includes, in order from an object, a first lens group (G1) having negative refractive power, and a second lens group (G2) having positive refractive power, and which satisfies the following conditional expression (1): 1.90<ft/Gf2<3.50 . . . (1), where ft denotes a focal length of the zoom lens (ZL) in the telephoto end state, and Gf2 denotes a focal length of the second lens group (G2).

Abstract: A zoom lens having, in order from an object: a first lens group G1 having positive refractive power; a second lens G2 group having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having positive refractive power, wherein the first lens group moves toward an image once then moves toward the object upon zooming from a wide-angle end state to a telephoto end state, and the following conditional expressions are satisfied: 0.050<fw/TLw<0.100 0.10<ft/TLt<0.80 0.10<fw/LG2<0.64 where fw denotes a focal length of the zoom lens in the wide-angle end state, ft denotes a focal length of the zoom lens in the telephoto end state, TLw denotes a total length of the zoom lens in the wide-angle end state, TLt denotes a total length of the zoom lens in the telephoto end state, and LG2 denotes a lens configuration length of the second lens group G2.

Abstract: A zoom lens including, 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; and a fourth lens group having positive refractive power, wherein when f2 denotes a focal length of the second lens group, and fw denotes a focal length of the zoom lens in the wide-angle end state, the following conditional expression being satisfied: 1.90<(?f2)/fw<3.00.

Abstract: Provided is a zoom lens, 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; and a fourth lens group (G4) having positive refractive power. The first lens group (G1 includes only, in order from the object, a cemented lens of a negative lens (L11) and a positive lens (L12), and a positive meniscus lens (L13) having a convex surface facing the object, an aperture stop (S) for determining brightness is disposed to the object side of the third lens group (G3), and upon zooming, all of the four groups (G1 to G4) move and the aperture stop (S) moves together with the third lens group (G3), and the conditional expression ?dp1>85.0 is satisfied, where ?dp1 denotes an Abbe number of the positive lens (L12), which is disposed closest to the object in the first lens group (G1), at the d-line as a standard.

Abstract: A zoom lens including, 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; and a fourth lens group having positive refractive power, wherein when f2 denotes a focal length of the second lens group, and fw denotes a focal length of the zoom lens in the wide-angle end state, the following conditional expression being satisfied: 1.90<(?f2)/fw<3.00.

Abstract: Provided is a zoom lens, 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; and a fourth lens group (G4) having positive refractive power. The first lens group (G1 includes only, in order from the object, a cemented lens of a negative lens (L11) and a positive lens (L12), and a positive meniscus lens (L13) having a convex surface facing the object, an aperture stop (S) for determining brightness is disposed to the object side of the third lens group (G3), and upon zooming, all of the four groups (G1 to G4) move and the aperture stop (S) moves together with the third lens group (G3), and the conditional expression ?dp1>85.0 is satisfied, where ?dp1 denotes an Abbe number of the positive lens (L12), which is disposed closest to the object in the first lens group (G1), at the d-line as a standard.

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.

Abstract: A zoom lens having, in order from the object, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, and a third lens group G3 having positive refractive power, wherein the second lens group G2 is constituted only by three or more cemented lenses.

Abstract: A zoom lens having, in order from an object, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, and a third lens group GH3 having positive refractive power, wherein the second lens group G2 is constituted only by three or more cemented lenses.

Abstract: A zoom lens having, in order from an object, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, and a third lens group GH3 having positive refractive power, wherein the second lens group G2 is constituted only by three or more cemented lenses.

Abstract: A zoom lens having, in order from the object, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, and a third lens group G3 having positive refractive power, wherein the second lens group G2 is constituted only by three or more cemented lenses.

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.

Abstract: A zoom lens having, in order from an object: a first lens group G1 having positive refractive power; a second lens G2 group having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having positive refractive power, wherein the first lens group moves toward an image once then moves toward the object upon zooming from a wide-angle end state to a telephoto end state, and the following conditional expressions are satisfied: 0.050<fw/TLw<0.100 0.10<ft/TLt<0.80 0.10<fw/LG2<0.64 where fw denotes a focal length of the zoom lens in the wide-angle end state, ft denotes a focal length of the zoom lens in the telephoto end state, TLw denotes a total length of the zoom lens in the wide-angle end state, TLt denotes a total length of the zoom lens in the telephoto end state, and LG2 denotes a lens configuration length of the second lens group G2.

Abstract: In a zoom lens ZL1 having a plurality of lens groups G1 to G2 which are disposed in order from an object, where a refractive index average value of the lens components which constitute the zoom lens ZL1 is defined as ndav and a refractive index average value of the lens components which constitute the first lens group G1 which is disposed to closest to the object among the plurality of lens groups G1 to G2 is defined as ndGlav, the zoom lens ZL1 is constituted to satisfy the conditional expression ndav?1.80 and to satisfy the conditional expression ndGlav?1.85.