JP5135723B2 - Zoom lens having image stabilization function, image pickup apparatus, image stabilization method for zoom lens, and zooming method for zoom lens - Google Patents

Zoom lens having image stabilization function, image pickup apparatus, image stabilization method for zoom lens, and zooming method for zoom lens Download PDF

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JP5135723B2
JP5135723B2 JP2006175768A JP2006175768A JP5135723B2 JP 5135723 B2 JP5135723 B2 JP 5135723B2 JP 2006175768 A JP2006175768 A JP 2006175768A JP 2006175768 A JP2006175768 A JP 2006175768A JP 5135723 B2 JP5135723 B2 JP 5135723B2
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JP2008003511A (en
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剛司 鈴木
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株式会社ニコン
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Description

  The present invention relates to a zoom lens having an image stabilization function, an imaging apparatus, an image stabilization method for a zoom lens, and a zooming method for a zoom lens.

Conventionally, a zoom lens having an anti-vibration function has been proposed (see, for example, Patent Document 1).
JP 2001-228397

  Although the zoom lens of each embodiment disclosed in Patent Document 1 has an anti-vibration function, the angle of view at the wide-angle end state is about 74 ° or less. There was a problem of not being able to respond sufficiently.

  Accordingly, the present invention has been made in view of the above problems, and has a long back focus that can also be used for a digital single lens reflex camera, and has a vibration-proof function that achieves a wide angle of view in a wide-angle end state. The purpose is to provide.

In order to solve the above problems, the present invention
In order from the 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, and a fourth lens having a negative refractive power The lens group and the fifth lens group having a positive refractive power substantially consist of five lens groups,
Upon zooming from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, The distance between the third lens group and the fourth lens group is increased, and the distance between the fourth lens group and the fifth lens group is decreased;
The fifth lens group has a positive lens closest to the object side,
Said pair and then movable in the linear direction orthogonal to the optical axis for the fourth lens group entire image plane correction upon shake generating,
Provided is a zoom lens having an image stabilization function that satisfies the following conditional expression.
5.71 ≦ f1 / fw <6.5
However,
f1: Focal length of the first lens group fw: Focal length of the zoom lens having the image stabilization function in the wide-angle end state
In order from the 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, and a fourth lens having a negative refractive power The lens group and the fifth lens group having a positive refractive power substantially consist of five lens groups,
Upon zooming from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, The distance between the third lens group and the fourth lens group is increased, and the distance between the fourth lens group and the fifth lens group is decreased;
The fourth lens group has a negative lens closest to the object side,
Said pair and then movable in the linear direction orthogonal to the optical axis for the fourth lens group entire image plane correction upon shake generating,
Provided is a zoom lens having an image stabilization function that satisfies the following conditional expression.
5.71 ≦ f1 / fw <6.5
However,
f1: Focal length of the first lens group fw: Focal length of the zoom lens having the image stabilization function in the wide-angle end state

  Also provided is an imaging apparatus comprising the zoom lens having the image stabilization function of the present invention.

The present invention also provides
In order from the 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, and a fourth lens having a negative refractive power An anti-vibration method for a zoom lens comprising substantially five lens groups by a group and a fifth lens group having a positive refractive power,
Upon zooming from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, The distance between the third lens group and the fourth lens group is increased, and the distance between the fourth lens group and the fifth lens group is decreased;
The fifth lens group has a positive lens closest to the object side,
Said pair and then movable in the linear direction orthogonal to the optical axis for the fourth lens group entire image plane correction upon shake generating,
Provided is a zoom lens vibration-proof method that satisfies the following conditional expression.
5.71 ≦ f1 / fw <6.5
However,
f1: Focal length fw of the first lens group fw: Focal length of the zoom lens in the wide-angle end state

The present invention also provides
In order from the 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, and a fourth lens having a negative refractive power In the zoom lens zooming method according to the present invention, a zoom lens comprising substantially five lens groups, and a fifth lens group having a positive refractive power,
Upon zooming from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, The distance between the third lens group and the fourth lens group is increased, and the distance between the fourth lens group and the fifth lens group is decreased;
The fifth lens group has a positive lens closest to the object side,
Said pair and then movable in the linear direction orthogonal to the optical axis for the fourth lens group entire image plane correction upon shake generating,
A zoom lens zooming method characterized by satisfying the following conditional expression:
5.71 ≦ f1 / fw <6.5
However,
f1: Focal length fw of the first lens group fw: Focal length of the zoom lens in the wide-angle end state

  According to the present invention, it is possible to provide a zoom lens having a long back focus that can also be used for a digital single-lens reflex camera and having an anti-vibration function that achieves a wide angle of view in a wide-angle end state.

Hereinafter, a zoom lens having an image stabilization function, an imaging apparatus, an image stabilization method for a zoom lens, and a zooming method for a zoom lens according to the present invention will be described.
The zoom lens having the image stabilization function includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and 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, and at the time of zooming from the wide-angle end state to the telephoto end state, the first lens group and the second lens group The distance between the lens group increases, the distance between the second lens group and the third lens group decreases, the distance between the third lens group and the fourth lens group increases, and the fourth lens group And the fifth lens group are reduced, and the entire fourth lens group is moved in a direction substantially perpendicular to the optical axis to perform image plane correction when camera shake occurs. The following conditional expression (1) is satisfied: It is configured to satisfy.
(1) 5.0 <f1 / fw <6.5
However,
f1: Focal length of the first lens group fw: Focal length of the zoom lens having the image stabilization function in the wide-angle end state

  In the zoom lens having the present image stabilization function, the fourth lens group is suitable for incorporating an image stabilization mechanism because the number of lenses is smaller than that of other lens groups and the lens diameter can be reduced.

In the zoom lens having the anti-vibration function, the conditional expression (1) defines the range of the focal length of the first lens group suitable for securing the back focus and securing the imaging performance.
If the upper limit value of conditional expression (1) is exceeded, the overall length and diameter of the zoom lens will be increased, making it difficult to put to practical use. In order to alleviate this influence, it is necessary to increase the refractive power of the second lens group excessively. As a result, field curvature and astigmatism are deteriorated, which is not preferable.

On the other hand, if the lower limit value of conditional expression (1) is not reached, the back focus is shortened and the spherical aberration and coma aberration in the telephoto end state are deteriorated when zooming is performed at high magnification.
If the upper limit value of conditional expression (1) is set to 6.0, the effect of the present invention can be made more reliable. Moreover, if the lower limit of conditional expression (1) is set to 5.5, the effect of the present invention can be made more reliable.

In the zoom lens having the image stabilization function, it is preferable that the fourth lens group includes only a positive lens and a negative lens.
Thereby, in the zoom lens having the image stabilization function, it is possible to satisfactorily correct the coma variation during image stabilization.

In the zoom lens having the anti-vibration function, it is desirable that the positive lens and the negative lens in the fourth lens group are cemented.
Thereby, axial chromatic aberration and lateral chromatic aberration can be corrected more satisfactorily in the zoom lens having the present image stabilization function.

In addition, it is desirable that the zoom lens having the image stabilization function satisfies the following conditional expression (2).
(2) -3.0 <f4 / fw <-1.0
However,
f4: focal length of the fourth lens group fw: focal length of the zoom lens having the image stabilization function in the wide-angle end state

Conditional expression (2) indicates that in the zoom lens having the present image stabilization function, the fourth lens group is orthogonal to the optical axis for securing the back focus and correcting the image plane during image stabilization, that is, when camera shake occurs. This defines the range of the focal length of the fourth lens group suitable for securing the performance when the lens is moved to.
If the upper limit value of conditional expression (2) is exceeded, the overall length and diameter of the zoom lens will increase, making it difficult to put it into practical use. Further, in order to alleviate this influence, it is necessary to excessively increase the refractive power of the third lens group and the fifth lens group. As a result, spherical aberration is deteriorated, which is not preferable.

On the other hand, if the lower limit value of conditional expression (2) is not reached, it is not preferable because the back focus is shortened or coma is deteriorated during image stabilization.
If the upper limit value of conditional expression (2) is set to -1.5, the effect of the present invention can be made more reliable. Moreover, if the lower limit of conditional expression (2) is set to -2.5, the effect of the present invention can be made more reliable.

In the zoom lens having the image stabilization function, it is desirable that the fourth lens group has a negative lens closest to the object side.
Thereby, in the zoom lens having the present image stabilization function, it is possible to satisfactorily correct astigmatism and coma during image stabilization.

In the zoom lens having the image stabilization function, the third lens group includes at least one cemented lens in order to satisfactorily correct axial chromatic aberration, and the following conditional expression (3) is satisfied. It is desirable to be satisfied.
(3) 0.2 <f3 / ft <0.45
However,
f3: focal length of the third lens unit ft: focal length of the zoom lens having the image stabilization function in the telephoto end state

Conditional expression (3) defines the focal length of the entire zoom lens and the focal length of the third lens group in the telephoto end state in the zoom lens having the image stabilization function.
If the lower limit value of conditional expression (3) is not reached, it is not preferable because the imaging performance is significantly deteriorated due to manufacturing errors. In addition, the spherical aberration is deteriorated in the telephoto end state.

On the other hand, if the upper limit value of conditional expression (3) is exceeded, the overall length and diameter of the zoom lens will increase, making it difficult to put it into practical use. Further, in order to mitigate this influence, it is necessary to excessively increase the refractive power of the second lens unit. As a result, the field curvature and astigmatism are deteriorated as described above, which is not preferable.
If the lower limit value of conditional expression (3) is set to 0.22, the effect of the present invention can be made more reliable. If the upper limit value of conditional expression (3) is set to 0.35, the effect of the present invention can be made more reliable.

In the zoom lens having the image stabilization function, it is preferable that the fourth lens group has at least one aspheric surface.
Thereby, in the zoom lens having the present image stabilization function, the coma aberration at the time of image stabilization can be corrected well.

The zoom lens having the anti-vibration function includes the fifth lens group in order to satisfactorily correct distortion, field curvature, and astigmatism in the wide-angle end state, and spherical aberration and coma aberration in the telephoto end state. However, it preferably has at least one aspherical surface and satisfies the following conditional expression (4).
(4) 0.2 <f5 / ft <1.0
However,
f5: focal length of the fifth lens group ft: focal length of the zoom lens having the image stabilization function in the telephoto end state

Conditional expression (4) defines the focal length of the entire zoom lens and the focal length of the fifth lens group in the telephoto end state in the zoom lens having the image stabilization function.
If the lower limit value of conditional expression (4) is not reached, it is not preferable because the imaging performance is significantly deteriorated due to manufacturing errors. In addition, the spherical aberration is deteriorated in the telephoto end state.

On the other hand, if the upper limit value of conditional expression (4) is exceeded, the overall length and diameter of the zoom lens will be increased, making it difficult to put to practical use. Further, in order to alleviate this influence, it is necessary to excessively increase the refractive power of the fourth lens group. As a result, the field curvature and astigmatism are deteriorated as described above, which is not preferable.
If the lower limit value of conditional expression (4) is set to 0.25, the effect of the present invention can be made more reliable. Moreover, if the upper limit of conditional expression (3) is set to 0.7, the effect of the present invention can be made more reliable.

In the zoom lens having the image stabilization function, it is desirable that the fifth lens group has a positive lens closest to the object side.
Thereby, in the zoom lens having the present image stabilization function, coma aberration can be corrected well during image stabilization.

In the zoom lens having the image stabilization function, it is desirable that the most image side lens surface in the fifth lens group has a convex shape on the image side.
Thereby, in the zoom lens having the present image stabilization function, it is possible to avoid that the reflected light on the image plane is reflected again on the final lens surface and becomes a ghost.

In addition, the imaging apparatus includes a zoom lens having the above-described configuration having an image stabilization function.
As a result, it is possible to realize an imaging apparatus having a vibration isolation function that achieves a wide angle of view in the wide-angle end state.

Further, the image stabilization method of the zoom lens includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power. An anti-vibration method for a zoom lens having a fourth lens group having negative refracting power and a fifth lens group having positive refracting power, and in the zooming from the wide-angle end state to the telephoto end state, The distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, and the distance between the third lens group and the fourth lens group increases. The distance between the fourth lens group and the fifth lens group is increased, and the entire fourth lens group is moved in a direction substantially orthogonal to the optical axis to perform image plane correction when camera shake occurs, The following conditional expression (1) is satisfied.
(1) 5.0 <f1 / fw <6.5
However,
f1: Focal length fw of the first lens group fw: Focal length of the zoom lens in the wide-angle end state

  With this configuration, in a zoom lens having an image stabilization function, it is possible to realize a long back focus that can be used for a digital single-lens reflex camera and a wide angle of view in a wide-angle end state.

The zoom lens zooming method includes, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power. In the zoom lens zooming method having a fourth lens group having negative refractive power and a fifth lens group having positive refractive power, the first zoom lens is zoomed from the wide-angle end state to the telephoto end state. The distance between the lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, and the distance between the third lens group and the fourth lens group increases. The distance between the fourth lens group and the fifth lens group is reduced, and the entire fourth lens group is moved in a direction substantially orthogonal to the optical axis to perform image plane correction when camera shake occurs. Conditional expression (1) is satisfied.
(1) 5.0 <f1 / fw <6.5
However,
f1: Focal length fw of the first lens group fw: Focal length of the zoom lens in the wide-angle end state

  With this configuration, in the zoom lens, it is possible to realize a long back focus that can also be used for a digital single-lens reflex camera, an image stabilization function, and a wide angle of view in the wide-angle end state.

Hereinafter, a zoom lens having an image stabilization function according to the present numerical example will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a diagram illustrating a configuration of a zoom lens having an image stabilization function according to the first embodiment.
The zoom lens having an anti-vibration function according to the present embodiment has, in order from the object side, a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, and a positive refractive power. The third lens group G3 includes a fourth lens group G4 having a negative refractive power, and a fifth lens group G5 having a positive refractive power.

In the zoom lens having the image stabilization function according to the present embodiment, the air gap between the first lens group G1 and the second lens group G2 is increased during zooming from the wide-angle end state to the telephoto end state, and the second lens. The air gap between the group G2 and the third lens group G3 decreases, the air gap between the third lens group G3 and the fourth lens group G4 increases, and the air gap between the fourth lens group G4 and the fifth lens group G5. Decrease.
In the zoom lens having the image stabilization function according to the present embodiment, image plane correction at the time of camera shake, that is, image stabilization is performed by moving the entire fourth lens group G4 in a direction orthogonal to the optical axis.

The first lens group G1 includes, in order from the object side, a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a biconvex positive lens L12, and a positive meniscus lens L13 having a convex surface facing the object side. Become.
The second lens group G2, in order from the object side, has a negative meniscus lens L21 having a convex surface directed toward the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a convex surface directed toward the image side. And a negative meniscus lens L24. An aspherical surface is formed by providing a resin layer on the object side lens surface of the negative meniscus lens L21.

The third lens group G3 includes, in order from the object side, a biconvex positive lens L31, a cemented lens of a biconvex positive lens L32, and a negative meniscus lens L33 having a convex surface facing the image side.
The fourth lens group G4 includes, in order from the object side, a biconcave negative lens L41 and a positive meniscus lens L42 having a convex surface directed toward the object side. An aspherical surface is formed on the image side lens surface of the positive meniscus lens L42.

The fifth lens group G5 includes, in order from the object side, a biconvex positive lens L51, a biconvex positive lens L52, and a negative meniscus lens L53 having a convex surface directed toward the image side. An aspheric surface is formed on the image side lens surface of the biconvex positive lens L52.
The aperture stop S is provided between the second lens group G2 and the third lens group G3, and moves together with the third lens group G3 upon zooming from the wide-angle end state to the telephoto end state.

Table 1 below lists values of specifications of the zoom lens having the image stabilization function according to the first example.
In [Overall specifications], f represents a focal length, FNO represents an F number, and 2ω represents an angle of view (unit: “°”).
In [Lens data], the first column N is the order of the lens surfaces counted from the object side, the second column r is the radius of curvature of the lens surfaces, the third column d is the distance between the lens surfaces, and the fourth column νd is d-line ( The Abbe number for the wavelength λ = 587.6 nm) and the fifth column nd indicate the refractive index for the d-line (wavelength λ = 587.6 nm). Further, r = 0.0000 represents a plane, and Bf represents a back focus.

[Aspherical data] shows the aspherical coefficient when the shape of the aspherical surface is expressed by the following equation.
x = (h 2 / r) / [1+ {1−κ (h / r) 2 } 1/2 ]
+ Bh 4 + ch 6 + dh 8 + eh 10 + fh 12
Here, x is the displacement (sag amount) in the optical axis direction at the position of the height h from the optical axis when the aspherical vertex is used as a reference, κ is the conic constant, b, c, d, e, f Is the aspheric coefficient, and r is the radius of curvature (paraxial radius of curvature) of the reference sphere.
“En” indicates “× 10 −n ”, for example “1.234E-05” indicates “1.234 × 10 −5 ”. Also, the description of the aspherical coefficient that is 0 (zero) is omitted.
[Variable interval data] indicates the focal length f and the variable interval between the lens groups.

  It should be noted that “mm” is generally used as a unit for the focal length f, the radius of curvature r, and other lengths listed in all the specification values of the following embodiments. However, since the optical system can obtain the same optical performance even when proportionally enlarged or reduced, the unit is not limited to “mm”. Note that the same reference numerals as in the present embodiment are used in the specification values of the following embodiments.

  Here, in a lens in which the focal length of the entire lens system is f, and the ratio of the amount of movement of the image on the image plane I to the amount of movement of the image stabilizing lens group at the time of blur correction, that is, a lens whose image stabilization coefficient is K, rotation of the angle θ In order to correct the blur, the anti-vibration lens group may be moved in the direction orthogonal to the optical axis by (f · tan θ) / K. Therefore, the zoom lens having the image stabilization function according to the present embodiment has a vibration isolation coefficient of 1.28 and a focal length of 16.4 (mm) in the wide-angle end state, and thus corrects a rotational shake of 0.80 °. The amount of movement of the fourth lens group for this purpose is 0.175 (mm). Further, since the image stabilization coefficient is 2.07 and the focal length is 82.0 (mm) in the telephoto end state, the amount of movement of the fourth lens group for correcting the rotational blur of 0.35 ° is 0.188. (Mm).

(Table 1)
[Overall specifications]
Wide angle end state Intermediate focal length state Telephoto end state f = 16.4 to 30.0 to 82.0
FNO = 3.1 to 3.8 to 5.1
2ω = 84.1 to 49.3 to 19.2

[Lens data]
N r d νd nd
1 198.051 0.900 23.77 1.846660
2 65.468 6.781 52.32 1.755000
3 -10000.000 0.100
4 48.860 4.470 46.58 1.804000
5 86.322 (d5)

6 67.942 0.140 38.09 1.553890 Aspheric
7 50.681 0.900 42.72 1.834810
8 11.684 7.267
9 -23.251 0.900 42.72 1.834810
10 45.927 0.200
11 33.112 3.951 25.68 1.784723
12 -19.436 0.100
13 -19.761 0.900 42.72 1.834810
14 -50.034 (d14)

15 0.000 0.200 Aperture stop S
16 43.276 2.000 69.99 1.490000
17 -40.531 0.200
18 33.914 2.874 34.55 1.615292
19 -19.676 0.900 23.77 1.846660
20 -75.035 (d20)

21 -25.907 0.900 42.72 1.834810
22 96.031 0.200
23 93.203 1.250 23.77 1.846660
24 270.530 (d24) Aspherical surface

25 73.065 5.920 82.52 1.497820
26 -20.557 0.200
27 69.683 3.439 64.10 1.516800
28 -35.778 1.068 Aspheric
29 -32.289 0.900 23.77 1.846660
30 -92.242 (Bf)

[Aspherical data]
κ b c de ef
6 sides 6.9188 3.22340E-05 -2.33190E-07 1.43900E-09 -5.38700E-12 6.57950E-15
24 surfaces 27.3255 -8.53681E-06 -2.37827E-08 3.80560E-10 0.00000E-00 0.00000E-00
28 surfaces -4.6992 1.09680E-05 5.59720E-08 -9.79100E-11 -3.21380E-14 4.74880E-15

[Variable interval data]
Wide-angle end state Intermediate focal length state Telephoto end state f 16.4 30.0 82.0
d5 2.200 16.580 41.718
d14 16.346 8.593 1.000
d20 2.665 6.397 9.611
d24 7.846 4.958 2.000
Bf 38.000 46.189 62.842

[Values for conditional expressions]
(1) f1 / fw = 5.84
(2) f4 / fw = -1.74
(3) f3 / ft = 0.30
(4) f5 / ft = 0.34

FIGS. 2A and 2B are diagrams showing various aberrations at the time of focusing at infinity in the wide-angle end state of the zoom lens having the image stabilization function according to the first example, and a rotation of 0.80 °, respectively. FIG. 6 is a meridional lateral aberration diagram when shake correction is performed on shake.
FIG. 3 is a diagram illustrating various aberrations when the zoom lens having the image stabilization function according to the first example is focused at infinity in the intermediate focal length state.
FIGS. 4A and 4B are diagrams showing various aberrations at the time of focusing at infinity in the telephoto end state of the zoom lens having the image stabilization function according to the first example, and a rotation of 0.35 °, respectively. FIG. 6 is a meridional lateral aberration diagram when shake correction is performed on shake.

In each aberration diagram, FNO represents an F number, and A represents a half angle of view (unit: “°”). The spherical aberration diagram shows the F-number value corresponding to the maximum aperture, the astigmatism diagram and the distortion diagram show the maximum value of the field angle, and the coma diagram shows the value of each field angle. D represents a d-line (λ = 587.6 nm), and g represents a g-line (λ = 435.8 nm). In the astigmatism diagram, the solid line indicates the sagittal image plane, and the broken line indicates the meridional image plane.
In addition, in the various aberration diagrams of each example shown below, the same reference numerals as those in this example are used.

  From the various aberration diagrams, the zoom lens having the image stabilization function according to the present embodiment corrects various aberrations well in each focal length state from the wide-angle end state to the telephoto end state, and has excellent imaging performance. You can see that

(Second embodiment)
FIG. 5 is a diagram illustrating a configuration of a zoom lens having an image stabilization function according to the second embodiment.
The zoom lens having an anti-vibration function according to the present embodiment has, in order from the object side, a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, and a positive refractive power. The third lens group G3 includes a fourth lens group G4 having a negative refractive power, and a fifth lens group G5 having a positive refractive power.

In the zoom lens having the image stabilization function according to the present embodiment, the air gap between the first lens group G1 and the second lens group G2 is increased during zooming from the wide-angle end state to the telephoto end state, and the second lens. The air gap between the group G2 and the third lens group G3 decreases, the air gap between the third lens group G3 and the fourth lens group G4 increases, and the air gap between the fourth lens group G4 and the fifth lens group G5. Decrease.
In the zoom lens having the image stabilization function according to the present embodiment, the entire fourth lens group G4 is moved in a direction orthogonal to the optical axis to perform image plane correction when camera shake occurs.

The first lens group G1 includes, in order from the object side, a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a positive meniscus lens L12 having a convex surface facing the object side, and a positive meniscus having a convex surface facing the object side. Lens L13.
The second lens group G2 includes, in order from the object side, a negative meniscus lens L21 having a convex surface directed toward the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a biconcave negative lens L24. It consists of. An aspherical surface is formed by providing a resin layer on the object side lens surface of the negative meniscus lens L21.

The third lens group G3 includes, in order from the object side, a cemented lens of a negative meniscus lens L31 having a convex surface directed toward the object side and a biconvex positive lens L32, and a biconvex positive lens L33.
The fourth lens group G4 includes, in order from the object side, a cemented lens of a biconcave negative lens L41 and a biconvex positive lens L42. A resin layer is provided on the object side lens surface of the biconcave negative lens L41 to form an aspheric surface.

The fifth lens group G5 includes, in order from the object side, a biconvex positive lens L51, a positive meniscus lens L52 having a convex surface directed to the image side, a biconcave negative lens L53, and a biconvex positive lens L54. Consists of. A resin layer is provided on the image side lens surface of the biconvex positive lens L51 to form an aspheric surface.
The aperture stop S is provided between the second lens group G2 and the third lens group G3, and moves together with the third lens group G3 upon zooming from the wide-angle end state to the telephoto end state.

Table 2 below lists values of specifications of the zoom lens having the image stabilization function according to the second example.
Here, since the zoom lens having the image stabilization function according to the present example has an image stabilization coefficient of 1.23 and a focal length of 16.4 (mm) in the wide-angle end state, the rotation blur of 0.80 ° is caused. The amount of movement of the fourth lens group for correction is 0.182 (mm). Further, since the image stabilization coefficient is 1.87 and the focal length is 76.0 (mm) in the telephoto end state, the amount of movement of the fourth lens group for correcting the rotational blur of 0.35 ° is 0.257. (Mm).

(Table 2)
[Overall specifications]
Wide-angle end state Intermediate focal length state Telephoto end state f = 16.4 to 30.8 to 76.0
FNO = 3.0 to 3.9 to 4.8
2ω = 84.0 to 48.4 to 20.5

[Lens data]
N r d νd nd
1 226.747 0.900 23.78 1.84666
2 62.610 5.765 49.61 1.77250
3 1373.287 0.200
4 46.503 4.047 42.72 1.83481
5 87.065 (d5)

6 41.038 0.150 38.09 1.55389 Aspheric surface
7 29.590 0.900 46.63 1.81600
8 11.164 5.959
9 -33.129 1.238 46.63 1.81600
10 47.954 0.200
11 31.400 5.384 23.78 1.84666
12 -34.768 0.676
13 -22.840 0.900 42.72 1.83481
14 338.855 (d14)

15 0.000 0.200 Aperture stop S
16 51.752 1.000 46.58 1.80 400
17 17.620 3.207 81.61 1.49700
18 -29.032 0.200
19 23.680 3.162 81.61 1.49700
20 -30.327 (d20)

21 -21.522 0.100 38.09 1.55389 Aspheric
22 -21.946 0.912 46.63 1.81600
23 22.800 3.500 25.43 1.80518
24 -162.035 (d24)

25 85.393 3.652 64.1 1.51680
26 -46.188 0.166 38.09 1.55389
27 -36.281 1.822 Aspherical surface
28 -118.612 2.564 42.72 1.83481
29 -31.981 0.900 23.78 1.84666
30 62.340 1.228
31 198.242 4.695 54.66 1.72916
32 -25.439 (Bf)

[Aspherical data]
κ b c de ef
6 sides 1.0 2.83940E-05 -9.31610E-08 2.40440E-10 4.40520E-13 0.00000E-00
21 side 1.0 2.86710E-05 4.18030E-08 0.00000E-00 0.00000E-00 0.00000E-00
27 side 1.0 3.13090E-05 -6.81170E-09 1.87160E-11 -9.41850E-14 0.00000E-00

[Variable interval data]
Wide-angle end state Intermediate focal length state Telephoto end state f 16.4 30.8 76.0
d5 2.000 9.821 38.308
d14 11.463 3.932 0.259
d20 1.202 6.202 11.202
d24 9.011 4.370 0.807
Bf 41.654 55.932 67.512

[Values for conditional expressions]
(1) f1 / fw = 5.71
(2) f4 / fw = -1.86
(3) f3 / ft = 0.26
(4) f5 / ft = 0.44

FIGS. 6A and 6B are diagrams showing various aberrations at the time of focusing at infinity in the wide-angle end state of the zoom lens having the image stabilization function according to the second example, and a rotation of 0.80 °, respectively. FIG. 6 is a meridional lateral aberration diagram when shake correction is performed on shake.
FIG. 7 is a diagram illustrating various aberrations when the zoom lens having the image stabilization function according to the second example is focused at infinity in the intermediate focal length state.
FIGS. 8A and 8B are diagrams showing various aberrations at the time of focusing on infinity in the telephoto end state of the zoom lens having the image stabilization function according to the second example, and a rotation of 0.35 °, respectively. FIG. 6 is a meridional lateral aberration diagram when shake correction is performed on shake.

  From the various aberration diagrams, the zoom lens having the image stabilization function according to the present embodiment corrects various aberrations well in each focal length state from the wide-angle end state to the telephoto end state, and has excellent imaging performance. You can see that

(Third embodiment)
FIG. 9 is a diagram illustrating a configuration of a zoom lens having an image stabilization function according to the third example.
The zoom lens having an anti-vibration function according to the present embodiment has a first lens group G1 having a positive refractive power, a second lens group G2 having a negative refractive power, and a positive refractive power in order from the object side. The third lens group G3 includes a fourth lens group G4 having a negative refractive power, and a fifth lens group G5 having a positive refractive power.

In the zoom lens having the image stabilization function according to the present embodiment, the air gap between the first lens group G1 and the second lens group G2 is increased during zooming from the wide-angle end state to the telephoto end state, and the second lens. The air gap between the group G2 and the third lens group G3 decreases, the air gap between the third lens group G3 and the fourth lens group G4 increases, and the air gap between the fourth lens group G4 and the fifth lens group G5. Decrease.
In the zoom lens having the image stabilization function according to the present embodiment, the entire fourth lens group G4 is moved in a direction orthogonal to the optical axis to perform image plane correction when camera shake occurs.

The first lens group G1 includes, in order from the object side, a cemented lens of a negative meniscus lens L11 having a convex surface facing the object side and a positive meniscus lens L12 having a convex surface facing the object side, and a positive meniscus having a convex surface facing the object side. Lens L13.
The second lens group G2, in order from the object side, has a negative meniscus lens L21 having a convex surface directed toward the object side, a biconcave negative lens L22, a biconvex positive lens L23, and a convex surface directed toward the image side. And a negative meniscus lens L24. An aspherical surface is formed by providing a resin layer on the object side lens surface of the negative meniscus lens L21.

The third lens group G3 includes, in order from the object side, a cemented lens of a negative meniscus lens L31 having a convex surface facing the object side and a biconvex positive lens L32, a biconvex positive lens L33, and a convex surface on the image side. And a cemented lens with the negative meniscus lens L34 directed.
The fourth lens group G4 includes, in order from the object side, a biconcave negative lens L41 and a positive meniscus lens L42 having a convex surface directed toward the object side. An aspheric surface is formed on the object side lens surface of the biconcave negative lens L41.

The fifth lens group G5 includes, in order from the object side, a biconvex positive lens L51, a cemented lens of a biconvex positive lens L52 and a biconcave negative lens L53, and a positive surface with a convex surface facing the image side. And a meniscus lens L54. An aspheric surface is formed on the image side lens surface of the biconvex positive lens L51.
The aperture stop S is provided between the second lens group G2 and the third lens group G3, and moves together with the third lens group G3 upon zooming from the wide-angle end state to the telephoto end state.

Table 3 below lists values of specifications of the zoom lens having the image stabilization function according to the third example.
Here, since the zoom lens having the image stabilization function according to the present embodiment has an image stabilization coefficient of 1.26 and a focal length of 16.0 (mm) in the wide-angle end state, the rotation blur of 0.80 ° is caused. The amount of movement of the fourth lens group for correction is 0.178 (mm). In the telephoto end state, since the image stabilization coefficient is 1.83 and the focal length is 76.0 (mm), the amount of movement of the fourth lens unit for correcting the 0.35 ° rotational blur is 0.262. (Mm).

(Table 3)
[Overall specifications]
Wide-angle end state Intermediate focal length state Telephoto end state f = 16.0 to 37.5 to 76.0
FNO = 3.2 to 4.2 to 5.1
2ω = 85.4 to 40.6 to 20.6

[Lens data]
N r d νd nd
1 189.003 2.077 23.78 1.84666
2 58.939 6.984 49.61 1.77250
3 366.099 0.200
4 46.643 4.702 42.72 1.83481
5 92.616 (d5)

6 52.209 0.150 38.09 1.55389 Aspheric
7 38.840 0.900 46.63 1.81600
8 12.761 7.706
9 -43.018 1.211 46.63 1.81600
10 35.183 0.200
11 33.612 5.153 23.78 1.84666
12 -36.203 0.782
13 -24.058 0.900 42.72 1.83481
14 -1589.752 (d14)

15 0.000 0.591 Aperture stop S
16 49.892 1.000 46.58 1.80 400
17 20.841 2.901 81.61 1.49700
18 -28.358 0.200
19 24.626 2.908 81.61 1.49700
20 -29.738 1.583 46.57 1.80400
21 -35.247 (d21)

22 -28.113 1.139 46.63 1.81600 Aspheric surface
23 19.627 2.473 25.43 1.80518
24 338.778 (d24)

25 35.847 4.576 64.1 1.51680
26 -138.411 0.200 Aspherical surface
27 148.413 3.216 42.72 1.83481
28 -34.147 0.900 23.78 1.84666
29 44.559 2.454
30 -175.917 3.761 54.66 1.72916
31 -25.439 (Bf)

[Aspherical data]
κ b c de ef
6 sides 1.0 1.73030E-05 -2.99420E-08 1.00710E-10 -3.57140E-13 1.00930E-15
22 surfaces 1.0 1.32810E-05 1.91090E-09 0.00000E-00 0.00000E-00 0.00000E-00
26 surfaces 1.0 3.37870E-05 -2.37190E-08 1.22890E-10 -3.00560E-12 1.40680E-14

[Variable interval data]
Wide-angle end state Intermediate focal length state Telephoto end state f 16.0 37.5 76.0
d5 2.311 18.601 37.846
d14 16.332 5.336 1.488
d21 1.097 6.097 11.588
d24 10.988 4.941 2.174
Bf 38.008 53.568 61.708

[Values for conditional expressions]
(1) f1 / fw = 6.05
(2) f4 / fw = -1.94
(3) f3 / ft = 0.27
(4) f5 / ft = 0.48

FIGS. 10A and 10B are graphs showing various aberrations at the time of focusing at infinity in the wide-angle end state of the zoom lens having the image stabilization function according to the third example, and a rotation of 0.80 °, respectively. FIG. 6 is a meridional lateral aberration diagram when shake correction is performed on shake.
FIG. 11 is a diagram illustrating various aberrations when the zoom lens having the image stabilization function according to the third example is focused at infinity in the intermediate focal length state.
FIGS. 12A and 12B are diagrams showing various aberrations at the time of focusing at infinity in the telephoto end state of the zoom lens having the image stabilization function according to the third example, and a rotation of 0.35 °, respectively. FIG. 6 is a meridional lateral aberration diagram when shake correction is performed on shake.

  From the various aberration diagrams, the zoom lens having the image stabilization function according to the present embodiment corrects various aberrations well in each focal length state from the wide-angle end state to the telephoto end state, and has excellent imaging performance. You can see that

  According to each of the embodiments described above, a long back focus that can be used for a digital single-lens reflex camera, a zoom ratio of about 5 times, and a wide angle of view of 80 ° or more in a wide-angle end state are achieved. A zoom lens having an anti-vibration function can be realized.

  Although the zoom lens having the five-group configuration is shown as a numerical example of the present zoom lens, the group configuration of the zoom lens having the image stabilization function is not limited to this, and zoom of other group configurations such as the sixth group and the seventh group. A lens can also be constructed.

  In addition, in a zoom lens having the image stabilization function, in order to focus from an object at infinity to an object at a short distance, a part of the lens group, one lens group, or a plurality of lens groups is used as the focusing lens group. It is good also as a structure moved to an optical axis direction. This focusing lens group can be applied to autofocus, and is also suitable for driving an autofocus motor, such as an ultrasonic motor. In the zoom lens, it is particularly preferable that the second lens group is the focusing lens group, and the fifth lens group, the entire first lens group, or a part of the first lens group may be the focusing lens group. .

  The lens surface of the lens constituting the zoom lens may be an aspherical surface. This aspherical surface may be any of an aspherical surface by grinding, a glass mold aspherical surface obtained by molding glass into an aspherical shape, or a composite aspherical surface in which a resin provided on the glass surface is formed into an aspherical shape.

Further, an antireflection film having a high transmittance in a wide wavelength range may be provided on the lens surface of the lens constituting the zoom lens. Thereby, flare and ghost can be reduced, and high optical performance can be achieved with high contrast.
In addition, each said Example has shown one specific example of this invention, and this invention is not limited to these.

Next, a camera equipped with a zoom lens having the image stabilization function will be described with reference to FIG.
FIG. 13 is a diagram illustrating a configuration of a camera including a zoom lens having the image stabilization function.
The camera 1 is a digital single-lens reflex camera provided with a zoom lens having the image stabilization function according to the first embodiment as the photographing lens 2 as shown in FIG.

  In the camera 1, light from an object (subject) (not shown) is collected by the taking lens 2 and imaged on the focusing screen 4 through the quick return mirror 3. The light imaged on the focusing screen 4 is reflected in the pentaprism 5 a plurality of times and guided to the eyepiece lens 6. Thus, the photographer can observe the subject image as an erect image through the eyepiece 6.

  When the release button (not shown) is pressed by the photographer, the quick return mirror 3 is retracted out of the optical path, and light from the subject (not shown) reaches the image sensor 7. Thereby, the light from the subject is picked up by the image pickup device 7 and recorded as a subject image in a memory (not shown). In this way, the photographer can shoot the subject with the camera 1.

Here, the zoom lens having the image stabilization function according to the first embodiment, which is mounted on the camera 1 as the photographing lens 2, has a digital single-lens reflex camera according to its characteristic lens configuration as described in the first embodiment. It achieves a long back focus that can also be used for cameras and a wide angle of view at the wide-angle end. As a result, the camera 1 has an anti-vibration function and can realize a wide angle of view in the wide-angle end state.
The present invention is not limited to the above, and the same effect as that of the camera 1 can of course be achieved even if a camera equipped with the zoom lens having the anti-vibration function according to the second and third embodiments as the photographing lens 2 is configured. be able to.

  As described above, the zoom lens, the imaging device, the anti-vibration method of the zoom lens, and the zoom having a long back focus that can be used also for a digital single-lens reflex camera and having a wide angle of view in a wide-angle end state. A lens zooming method can be realized.

It is a figure which shows the structure of the zoom lens which has a vibration proof function which concerns on 1st Example. (A) and (b) are diagrams showing various aberrations at the time of focusing at infinity in the wide-angle end state of the zoom lens having the image stabilization function according to the first example, and a rotational blur of 0.80 °. FIG. 6 is a meridional lateral aberration diagram when correction is performed. FIG. 6 is a diagram illustrating various aberrations when the zoom lens having an image stabilization function according to Example 1 is focused at infinity in the intermediate focal length state. (A) and (b) are diagrams showing various aberrations at the time of focusing on infinity in the telephoto end state of the zoom lens having the image stabilization function according to the first example, and a blurring with respect to a rotation blur of 0.35 °. FIG. 6 is a meridional lateral aberration diagram when correction is performed. It is a figure which shows the structure of the zoom lens which has a vibration proof function which concerns on 2nd Example. (A) and (b) are diagrams showing various aberrations at the time of focusing at infinity in the wide-angle end state of the zoom lens having the image stabilization function according to the second example, and a blurring with respect to a rotation blur of 0.80 °. FIG. 6 is a meridional lateral aberration diagram when correction is performed. FIG. 12 is a diagram illustrating various aberrations when the zoom lens having an image stabilization function according to Example 2 is focused at infinity in the intermediate focal length state. (A) and (b) are diagrams showing various aberrations at the time of focusing on infinity in the telephoto end state of the zoom lens having the image stabilization function according to the second embodiment, and blurring with respect to a rotation blur of 0.35 °. FIG. 6 is a meridional lateral aberration diagram when correction is performed. It is a figure which shows the structure of the zoom lens which has an anti-vibration function based on 3rd Example. (A) and (b) are diagrams showing various aberrations at the time of focusing on infinity in the wide-angle end state of the zoom lens having the image stabilization function according to the third example, and a shake with respect to a rotation blur of 0.80 °. FIG. 6 is a meridional lateral aberration diagram when correction is performed. FIG. 11 is a diagram illustrating all aberrations when the zoom lens having an image stabilization function according to Example 3 is in focus at infinity in the intermediate focal length state. (A) and (b) are diagrams showing various aberrations at the time of focusing at infinity in the telephoto end state of the zoom lens having the image stabilization function according to the third example, and a blurring with respect to a rotation blur of 0.35 °. FIG. 6 is a meridional lateral aberration diagram when correction is performed. It is a figure which shows the structure of the camera provided with the zoom lens which has this anti-vibration function.

Explanation of symbols

G1 1st lens group G2 2nd lens group G3 3rd lens group G4 4th lens group G5 5th lens group S Aperture stop I Image surface W Wide angle end state M Intermediate focal length state T Telephoto end state

Claims (14)

  1. In order from the 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, and a fourth lens having a negative refractive power The lens group and the fifth lens group having a positive refractive power substantially consist of five lens groups,
    Upon zooming from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, The distance between the third lens group and the fourth lens group is increased, and the distance between the fourth lens group and the fifth lens group is decreased;
    The fifth lens group has a positive lens closest to the object side,
    Said pair and then movable in the linear direction orthogonal to the optical axis for the fourth lens group entire image plane correction upon shake generating,
    A zoom lens having an anti-vibration function characterized by satisfying the following conditional expression:
    5.71 ≦ f1 / fw <6.5
    However,
    f1: Focal length of the first lens group fw: Focal length of the zoom lens having the image stabilization function in the wide-angle end state
  2.   The zoom lens having an anti-vibration function according to claim 1, wherein the fourth lens group includes a negative lens closest to the object side.
  3. In order from the 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, and a fourth lens having a negative refractive power The lens group and the fifth lens group having a positive refractive power substantially consist of five lens groups,
    Upon zooming from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, The distance between the third lens group and the fourth lens group is increased, and the distance between the fourth lens group and the fifth lens group is decreased;
    The fourth lens group has a negative lens closest to the object side,
    Said pair and then movable in the linear direction orthogonal to the optical axis for the fourth lens group entire image plane correction upon shake generating,
    A zoom lens having an anti-vibration function characterized by satisfying the following conditional expression:
    5.71 ≦ f1 / fw <6.5
    However,
    f1: Focal length of the first lens group fw: Focal length of the zoom lens having the image stabilization function in the wide-angle end state
  4.   The zoom lens having an anti-vibration function according to claim 3, wherein the fifth lens group includes a positive lens closest to the object side.
  5.   5. The zoom lens having an anti-vibration function according to claim 1, wherein the fourth lens group includes only a positive lens and a negative lens.
  6.   6. The zoom lens having an image stabilization function according to claim 5, wherein the positive lens and the negative lens in the fourth lens group are cemented.
  7. The zoom lens having an anti-vibration function according to any one of claims 1 to 6, wherein the following conditional expression is satisfied.
    −3.0 <f4 / fw <−1.0
    However,
    f4: focal length of the fourth lens group fw: focal length of the zoom lens having the image stabilization function in the wide-angle end state
  8. The third lens group includes at least one cemented lens;
    The zoom lens having an image stabilization function according to any one of claims 1 to 7, wherein the following conditional expression is satisfied.
    0.2 <f3 / ft <0.45
    However,
    f3: focal length of the third lens unit ft: focal length of the zoom lens having the image stabilization function in the telephoto end state
  9.   9. The zoom lens having an anti-vibration function according to claim 1, wherein the fourth lens group has at least one aspheric surface. 10.
  10. The fifth lens group has at least one aspheric surface,
    The zoom lens having an image stabilization function according to claim 1, wherein the following conditional expression is satisfied.
    0.2 <f5 / ft <1.0
    However,
    f5: focal length of the fifth lens group ft: focal length of the zoom lens having the image stabilization function in the telephoto end state
  11.   11. The zoom lens having an anti-vibration function according to claim 1, wherein a lens surface closest to the image side in the fifth lens group has a convex shape on the image side.
  12.   An imaging apparatus comprising the zoom lens having the image stabilization function according to any one of claims 1 to 11.
  13. In order from the 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, and a fourth lens having a negative refractive power An anti-vibration method for a zoom lens comprising substantially five lens groups by a group and a fifth lens group having a positive refractive power,
    Upon zooming from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, The distance between the third lens group and the fourth lens group is increased, and the distance between the fourth lens group and the fifth lens group is decreased;
    The fifth lens group has a positive lens closest to the object side,
    Said pair and then movable in the linear direction orthogonal to the optical axis for the fourth lens group entire image plane correction upon shake generating,
    A zoom lens vibration-proof method characterized by satisfying the following conditional expression:
    5.71 ≦ f1 / fw <6.5
    However,
    f1: Focal length fw of the first lens group fw: Focal length of the zoom lens in the wide-angle end state
  14. In order from the 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, and a fourth lens having a negative refractive power In the zoom lens zooming method according to the present invention, a zoom lens comprising substantially five lens groups, and a fifth lens group having a positive refractive power,
    Upon zooming from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, The distance between the third lens group and the fourth lens group is increased, and the distance between the fourth lens group and the fifth lens group is decreased;
    The fifth lens group has a positive lens closest to the object side,
    Said pair and then movable in the linear direction orthogonal to the optical axis for the fourth lens group entire image plane correction upon shake generating,
    A zoom lens zooming method characterized by satisfying the following conditional expression:
    5.71 ≦ f1 / fw <6.5
    However,
    f1: Focal length fw of the first lens group fw: Focal length of the zoom lens in the wide-angle end state
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JP5100411B2 (en) * 2008-01-23 2012-12-19 キヤノン株式会社 Zoom lens and imaging apparatus having the same
JP5177795B2 (en) * 2008-03-31 2013-04-10 株式会社ニコン Magnifying optical system, optical apparatus equipped with the magnifying optical system, and magnifying method of the magnifying optical system
US7974012B2 (en) 2008-03-31 2011-07-05 Nikon Corporation Zoom lens system, optical device with the zoom lens system, and method of manufacturing the zoom lens system
JP5115718B2 (en) * 2008-03-31 2013-01-09 株式会社ニコン Magnifying optical system, optical apparatus equipped with the magnifying optical system, and magnifying method of the magnifying optical system
JP5487569B2 (en) * 2008-07-04 2014-05-07 株式会社ニコン Magnifying optical system, optical apparatus equipped with the magnifying optical system, and magnifying method of the magnifying optical system
JP2012042547A (en) * 2010-08-16 2012-03-01 Nikon Corp Variable power optical system, optical apparatus having the same and method for manufacturing variable power optical system
CN102621675B (en) 2011-01-25 2016-01-20 株式会社尼康 Zoom lens system, optical device and the method for the manufacture of Zoom lens system
JP5440560B2 (en) * 2011-06-30 2014-03-12 株式会社ニコン Variable-magnification optical system, optical device, and variable-magnification optical system manufacturing method
JP5208256B2 (en) * 2011-09-16 2013-06-12 キヤノン株式会社 Zoom lens and imaging apparatus having the same
JP5769606B2 (en) * 2011-12-05 2015-08-26 オリンパス株式会社 Zoom lens and image pickup apparatus including the same
JP5936439B2 (en) * 2012-05-21 2016-06-22 キヤノン株式会社 Zoom lens and imaging apparatus having the same
JP6213912B2 (en) * 2013-05-02 2017-10-18 株式会社タムロン Small high zoom lens
JP6281199B2 (en) * 2013-07-29 2018-02-21 株式会社ニコン Variable magnification optical system, optical apparatus, and variable magnification optical system manufacturing method
JP6146870B2 (en) * 2014-04-25 2017-06-14 富士フイルム株式会社 Zoom lens and imaging device

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JP2001249276A (en) * 2000-03-03 2001-09-14 Olympus Optical Co Ltd Photographic lens with image blurring correcting function
JP2004233750A (en) * 2003-01-31 2004-08-19 Nikon Corp Zoom lens
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