CN101510000A - Photography lens, optical apparatus with the same and process for manufacturing photography lens - Google Patents

Photography lens, optical apparatus with the same and process for manufacturing photography lens Download PDF

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Publication number
CN101510000A
CN101510000A CNA2009100041176A CN200910004117A CN101510000A CN 101510000 A CN101510000 A CN 101510000A CN A2009100041176 A CNA2009100041176 A CN A2009100041176A CN 200910004117 A CN200910004117 A CN 200910004117A CN 101510000 A CN101510000 A CN 101510000A
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lens
mentioned
composition
refractive power
rear side
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CN101510000B (en
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武俊典
山本彩恭子
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Nikon Corp
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Nikon Corp
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Priority claimed from JP2008100936A external-priority patent/JP5136776B2/en
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Abstract

This invention provides a photographic lens, an optical apparatus having a photographic lens, and a method for manufacturing a photographic lens. The photographic lens here provided is configured as bellows: on the side nearest to an object, including a first lens component having a positive refractive power, a second lens component having a positive refractive power in order from an object side, including a combined lens formed by adhering a positive lens and a negative lens in order from an object side, setting a refractive index of the first lens component to line d as n1, Abbe number as v1, setting a refractive index of the second lens component as n2, Abbe number as v2, to meet the conditions of the following formulas: 1.49(v1+v2)/2 is more than (n1+n2)/2 but less than 60.

Description

Photographic lens, has the manufacture method of its optical device and photographic lens
Technical field
The present invention relates to a kind of photographic lens, have the optical device and the formation method of this photographic lens.
Background technology
In the past, in taking a picture with camera, video camera etc., there were so-called Gaussian lens in lens type brighter as the F number, that obtain high optical property easily, also used morely now (for example, with reference to the flat 1-30231 communique of TOHKEMY).
Yet, in existing lens, exist aberration, particularly side spectrum to correct inadequate problem.
Summary of the invention
The present invention is in view of such problem, and each aberration that it is about 1.2 that its purpose is a kind of F number is provided, can correct picture integral body well particularly aberration, picture integral body has the photographic lens of high optical property.
Cumulated volume inventive embodiment,, advantage of the present invention aspect some and novel characteristics in this explanation.Need not any specific embodiment according to the present invention and realize the advantage that all are such.Thereby the present invention can specialize or implement in the following manner, that is, needn't realize can situation in other advantages of this enlightenment or proposition under, realize or optimization in one or more advantages that this enlightened.
Photographic lens of the present invention, it is characterized in that, at the most close object side, comprise first lens composition with positive refractive power and the second lens composition successively from object side with positive refractive power, in the most close picture side, have the compound lens of successively positive lens and negative lens being fitted and forming from object side, establishing the above-mentioned first lens composition is that n1, Abbe number are ν 1 to the refractive index of d line, if the above-mentioned second lens composition is n2, when Abbe number is ν 2, satisfies the condition of following formula the refractive index of d line:
(n1+n2)/2>1.49
(ν1+ν2)/2>60。
Preferred in this photographic lens, above-mentioned first lens composition and the above-mentioned second lens composition are the crescent-shaped of convex surface towards object side.
Preferred in this photographic lens, between above-mentioned second lens composition and above-mentioned compound lens, have successively: front side negative lens composition with negative refractive power from object side; Aperture diaphragm; Rear side negative lens composition with negative refractive power; With rear side positive lens composition with positive refractive power.
Preferred in this photographic lens, between above-mentioned second lens composition and above-mentioned front side negative lens composition, have the three lens composition of convex surface towards the crescent-shaped of object side.
Preferred in this photographic lens, above-mentioned front side negative lens composition is the four lens composition of convex surface towards the crescent-shaped of object side, and above-mentioned rear side negative lens composition is the 5th a lens composition of concave-concave shape.
Preferred in this photographic lens, between the 6th lens composition and above-mentioned compound lens, possess the 7th lens composition with positive refractive power as above-mentioned rear side positive lens composition.
Preferred in this photographic lens, above-mentioned rear side negative lens composition and above-mentioned rear side positive lens composition are fitted and are formed compound lens.
Preferred in this photographic lens, if the above-mentioned positive lens of the most close above-mentioned compound lens as side configuration is that n8, Abbe number are ν 8 to the refractive index of d line, the above-mentioned negative lens of the most close above-mentioned compound lens as side configuration is n9, when Abbe number is ν 9, satisfies the condition of following formula the refractive index of d line:
n8>n9
ν8>ν9。
Preferred in this photographic lens, the radius-of-curvature as the face of side of establishing above-mentioned front side negative lens composition is r8, when the focal length of above-mentioned photographic lens complete set is f, satisfies the condition of following formula:
0.3<r8/f<0.5。
Preferred in this photographic lens, the above-mentioned compound lens and the other lenses of the most close picture side configuration move along optical axis with different speed when focusing.
Preferred in this photographic lens, the focal length of establishing the most close above-mentioned compound lens as the side configuration is the focal length of f89, above-mentioned photographic lens complete set when being f, satisfies the condition of following formula:
1<f89/f<2。
Preferred in this photographic lens, the above-mentioned positive lens composition of the most close above-mentioned compound lens as the side configuration is the biconvex shape.
In addition, optical device of the present invention has any of above-mentioned photographic lens.
Photographic lens of the present invention is characterized in that, comprises front side lens combination with positive refractive power and the rear side lens group with positive refractive power successively from object side, and above-mentioned front side lens combination comprises successively from object side: the first lens composition with positive refractive power; The second lens composition with positive refractive power; The 3rd lens composition with positive refractive power; The 4th lens composition with negative refractive power; Aperture diaphragm; The 5th lens composition with negative refractive power; The 6th lens composition with positive refractive power; With the 7th lens composition with positive refractive power, above-mentioned rear side lens group comprises the compound lens of successively positive lens and negative lens being fitted and forming from object side, from infinity when closer object is focused, above-mentioned front side lens combination and above-mentioned rear side lens group move along the optical axis direction object side with different amount of movements, so that the interval between above-mentioned front side lens combination and the above-mentioned rear side lens group increases, if the focal length of above-mentioned front side lens combination is the focal length of fF, above-mentioned rear side lens group when being fR, satisfy the condition of following formula:
0.79<fF/fR<1.58。
Preferred in this photographic lens, above-mentioned front side lens combination and above-mentioned rear side lens group, from middle photo distance when closer object is focused, with different amount of movements than moving along optical axis.
Preferred in this photographic lens, the focal length of establishing the above-mentioned negative lens in the above-mentioned rear side lens group is the focal length of f9, above-mentioned photographic lens complete set when being f, satisfies the condition of following formula:
0.78<(-f9)/f<1.59。
Preferred in this photographic lens, above-mentioned the 5th lens composition is the concave-concave shape, and above-mentioned the 6th lens composition is the biconvex shape.
Preferred in this photographic lens, above-mentioned the 7th lens composition is the positive lens of biconvex shape.
Preferred in this photographic lens, above-mentioned the 7th lens composition is the positive concave-convex lens of convex surface towards the picture side.
Photographic lens of the present invention, it is characterized in that, comprise front side lens combination successively with positive refractive power from object side, with rear side lens group with positive refractive power, above-mentioned front side lens combination, comprise the first lens composition successively with positive refractive power from the most close object side, with the second lens composition with positive refractive power, above-mentioned rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side, if the above-mentioned first lens composition is ν 1 to the Abbe number of d line, the above-mentioned second lens composition is ν 2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(ν1+ν2)/2>60
0.35<γR1/γF1<0.80。
Preferred in this photographic lens, above-mentioned front side lens combination and above-mentioned rear side lens group, from middle photo distance when closer object is focused, with different amount of movements than moving along optical axis.
Preferred in this photographic lens, during for photography multiplying power-0.07 times, the amount of movement of establishing above-mentioned front side lens combination is γ F2, when the amount of movement of above-mentioned rear side lens group is γ R2, satisfies the condition of following formula from the infinity focusing:
0.35<γR2/γF2<0.50。
Photographic lens of the present invention, it is characterized in that, comprise front side lens combination successively with positive refractive power from object side, with rear side lens group with positive refractive power, above-mentioned front side lens combination, comprise the first lens composition to object side from aperture diaphragm with positive refractive power, with the second lens composition with positive refractive power, above-mentioned rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side, if the above-mentioned first lens composition is ν 1 to the Abbe number of d line, the above-mentioned second lens composition is ν 2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(ν1+ν2)/2>60
0.35<γR1/γF1<0.80。
Preferred in this photographic lens, above-mentioned front side lens combination and above-mentioned rear side lens group, from middle photo distance when closer object is focused, with different amount of movements than moving along optical axis.
Preferred in this photographic lens, during for photography multiplying power-0.07 times, the amount of movement of establishing above-mentioned front side lens combination is γ F2, when the amount of movement of above-mentioned rear side lens group is γ R2, satisfies the condition of following formula from the infinity focusing:
0.35<γR2/γF2<0.50。
The manufacture method of photographic lens of the present invention, it is characterized in that, may further comprise the steps: dispose front side lens combination with positive refractive power and rear side lens group successively with positive refractive power from object side, this front side lens combination comprises first lens composition with positive refractive power and the second lens composition with positive refractive power, and this rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side; With mobile above-mentioned front side lens combination so that be photography multiplying power-0.01 times from infinity focusing, if the above-mentioned first lens composition is ν 1 to the Abbe number of d line, the above-mentioned second lens composition is ν 2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(ν1+ν2)/2>60
0.35<γR1/γF1<0.80。
Preferred in the manufacture method of this photographic lens, between above-mentioned second lens composition and above-mentioned compound lens, comprise successively: front side negative lens composition with negative refractive power from object side; Aperture diaphragm; Rear side negative lens composition with negative refractive power; With rear side positive lens composition with positive refractive power.
Preferred in the manufacture method of this photographic lens, the above-mentioned compound lens and the other lenses of the most close picture side configuration move along optical axis with different speed when focusing.
The manufacture method of photographic lens of the present invention is characterized in that, may further comprise the steps: dispose front side lens combination with positive refractive power and the rear side lens group with positive refractive power successively from object side; With so that the mode that the interval between above-mentioned front side lens combination and the above-mentioned rear side lens group increases, above-mentioned front side lens combination and above-mentioned rear side lens group are moved along the optical axis direction object side with different amount of movements, thereby when closer object was focused, above-mentioned front side lens combination comprised successively from object side from infinity: the first lens composition with positive refractive power; The second lens composition with positive refractive power; The 3rd lens composition with positive refractive power; The 4th lens composition with negative refractive power; Aperture diaphragm; The 5th lens composition with negative refractive power; The 6th lens composition with positive refractive power; With the 7th lens composition with positive refractive power, above-mentioned rear side lens group comprises the compound lens of successively positive lens and negative lens being fitted and forming from object side, if the focal length of above-mentioned front side lens combination is the focal length of fF, above-mentioned rear side lens group when being fR, satisfy the condition of following formula: 0.79＜fF/fR＜1.58.
Preferred in the manufacture method of this photographic lens, above-mentioned front side lens combination and above-mentioned rear side lens group, from middle photo distance when closer object is focused, with different amount of movements than moving along optical axis.
Preferred in the manufacture method of this photographic lens, the focal length of establishing the above-mentioned negative lens in the above-mentioned rear side lens group is the focal length of f9, above-mentioned photographic lens complete set when being f, satisfies the condition of following formula:
0.78<(-f9)/f<1.59。
The manufacture method of photographic lens of the present invention, it is characterized in that, may further comprise the steps: configuration has the front side lens combination of positive refractive power and has the rear side lens group of positive refractive power, this front side lens combination comprises first lens composition with positive refractive power and the second lens composition with positive refractive power successively from object side, and this rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side; With mobile above-mentioned front side lens combination so that be photography multiplying power-0.01 times from infinity focusing, if the above-mentioned first lens composition is ν 1 to the Abbe number of d line, the above-mentioned second lens composition is ν 2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(ν1+ν2)/2>60
0.35<γR1/γF1<0.80。
The manufacture method of photographic lens of the present invention, it is characterized in that, may further comprise the steps: configuration has the front side lens combination of positive refractive power and has the rear side lens group of positive refractive power, this front side lens combination comprises first lens composition with positive refractive power and the second lens composition with positive refractive power from aperture diaphragm to object side, and this rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side; With mobile above-mentioned front side lens combination so that be photography multiplying power-0.01 times from infinity focusing, if the above-mentioned first lens composition is ν 1 to the Abbe number of d line, the above-mentioned second lens composition is ν 2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(ν1+ν2)/2>60
0.35<γR1/γF1<0.80。
Preferred in the manufacture method of this photographic lens, during for photography multiplying power-0.07 times, the amount of movement of establishing above-mentioned front side lens combination is γ F2, when the amount of movement of above-mentioned rear side lens group is γ R2, satisfies the condition of following formula from the infinity focusing:
0.35<γR2/γF2<0.50。
Preferred in the manufacture method of this photographic lens, during for photography multiplying power-0.07 times, the amount of movement of establishing above-mentioned front side lens combination is γ F2, when the amount of movement of above-mentioned rear side lens group is γ R2, satisfies the condition of following formula from the infinity focusing:
0.35<γR2/γF2<0.50。
As above constitute photographic lens of the present invention, when having the manufacture method of the optical device of this photographic lens and photographic lens, can obtain following photographic lens: the F number is about 1.2, can correct each aberration, the particularly aberration of picture integral body well, have high optical property in picture integral body.
Description of drawings
Fig. 1 is the cut-open view of structure that the photographic lens of the first embodiment of the present invention is shown.
Fig. 2 A is each aberration diagram under the infinity focusing state of first embodiment.
Fig. 2 B is each aberration diagram under the limited distance focusing state of first embodiment.
Fig. 3 is the cut-open view of structure that the photographic lens of the second embodiment of the present invention is shown.
Fig. 4 A is each aberration diagram under the infinity focusing state of second embodiment.
Fig. 4 B is each aberration diagram under the limited distance focusing state of second embodiment.
Fig. 5 is the cut-open view of structure that the photographic lens of the third embodiment of the present invention is shown.
Fig. 6 A is each aberration diagram under the infinity focusing state of the 3rd embodiment.
Fig. 6 B is each aberration diagram under the limited distance focusing state of the 3rd embodiment.
Fig. 7 is the cut-open view of structure that the photographic lens of the fourth embodiment of the present invention is shown.
Fig. 8 A is each aberration diagram under the infinity focusing state of the 4th embodiment.
Fig. 8 B is each aberration diagram under the limited distance focusing state of the 4th embodiment.
Fig. 9 A is the front view (FV) that carries the electronic stills camera of photographic lens of the present invention.
Fig. 9 B is the back view that carries the electronic stills camera of photographic lens of the present invention.
Figure 10 is the cut-open view along the A-A ' line of Fig. 9 A.
Figure 11 is the cut-open view of structure that the photographic lens of the fifth embodiment of the present invention is shown.
Figure 12 A is each aberration diagram under the infinity focusing state of the 5th embodiment.
Figure 12 B is each aberration diagram under the middle photo distance focusing state of the 5th embodiment.
Figure 12 C is each aberration diagram under the closely focusing state of the 5th embodiment.
Figure 13 is the cut-open view of structure that the photographic lens of the sixth embodiment of the present invention is shown.
Figure 14 A is each aberration diagram under the infinity focusing state of the 6th embodiment.
Figure 14 B is each aberration diagram under the middle photo distance focusing state of the 6th embodiment.
Figure 14 C is each aberration diagram under the closely focusing state of the 6th embodiment.
Figure 15 is the cut-open view of structure that the photographic lens of the seventh embodiment of the present invention is shown.
Figure 16 A is each aberration diagram under the infinity focusing state of the 7th embodiment.
Figure 16 B is each aberration diagram under the middle photo distance focusing state of the 7th embodiment.
Figure 16 C is each aberration diagram under the closely focusing state of the 7th embodiment.
Figure 17 is the cut-open view of structure that the photographic lens of the eighth embodiment of the present invention is shown.
Figure 18 A is each aberration diagram under the infinity focusing state of the 8th embodiment.
Figure 18 B is each aberration diagram under the middle photo distance focusing state of the 8th embodiment.
Figure 18 C is each aberration diagram under the closely focusing state of the 8th embodiment.
Figure 19 is the figure that is used to illustrate that the section of the electronic stills camera that carries photographic lens of the present invention constitutes.
Figure 20 is the process flow diagram of manufacture method of the photographic lens of embodiment.
Embodiment
(first embodiment)
Below, with reference to accompanying drawing preferred first embodiment of the present invention is described.As shown in Figure 1, this photographic lens ZL begins along optical axis from object side to have successively: the first lens composition G1 with positive refractive power; The second lens composition G2 with positive refractive power; The most close picture side is from the object side compound lens G89 that positive lens G8 and negative lens G9 form that fits successively.By this structure, this photographic lens ZL can be the Large Aperture Lenses of 25～30mm for effective diameter.In addition, by the most close as side configuration with the compound lens G89 that positive lens G8 and negative lens G9 fit and form, also have the achromatism effect at lens as side, integral body can be corrected aberration.Can prevent from the total reflection of light from light to be passed through well in these lens by this compound lens.
Embodiment as this photographic lens ZL, as shown in Figure 1, except the above-mentioned first lens composition G1, the second lens composition G2 and compound lens G89, between the object side of the picture side of the second lens composition G2 and compound lens G89, be disposed with from object side: convex surface is towards the 3rd lens composition G3 of crescent (meniscus) shape of object side; Front side negative lens composition G4 with negative refractive power; Aperture diaphragm S; To have the rear side negative lens composition G5 of negative refractive power and have the compound lens G56 that the rear side positive lens composition G6 of positive refractive power fits and to form; With the 7th lens composition G7 with positive refractive power.The preferred integral body of this photographic lens ZL is made of 7 groups of 9 lens.
This photographic lens ZL is that the lens distortion with so-called Gaussian type forms.In Gaussian type, lens roughly are the shape of symmetry before and after diaphragm, and therefore by its symmetry, the rectification of distortion aberration etc. is comparatively simple.In addition, this photographic lens ZL, flat 1-302311 is same with TOHKEMY, by (being first～the 3rd lens composition G1～G3) in Fig. 1 at 3 lens compositions of object side configuration of the negative meniscus lens that relies on object side than aperture diaphragm S (among Fig. 1 for front side negative lens composition G4), radius-of-curvature separately increases, and the generation of spherical aberration reduces.
Among this external photographic lens ZL, the first lens composition G1 and the second lens composition G2 all are preferably the crescent-shaped of convex surface towards object side.Front side negative lens composition G4 as the 4th lens composition is preferably the crescent-shaped of convex surface towards object side.Rear side negative lens composition G5 as the 5th lens composition is preferably the concave-concave shape in addition.And then, be preferably the biconvex shape at the positive lens G8 of the most close compound lens G89 as side configuration.
In addition as mentioned above, when disposing the 3rd lens composition G3 of the refractive power with plus or minus between the second lens composition G2 and front side negative lens composition G4, the 3rd lens composition G3 preferably is made of 1～2 lens.When disposing the 7th lens composition G7 between this external rear side negative lens composition G5 and the compound lens G89, the 7th lens composition preferably is made of 1～2 lens, and preferably has positive refractive power.
Next the condition that is used to constitute this photographic lens ZL is described.At first, establishing the first lens composition G1 is that n1, Abbe number are ν 1 to the refractive index of d line, establish the second lens composition G2 to the refractive index of d line be n2, when Abbe number is ν 2, this photographic lens ZL satisfies conditional shown below (1) and conditional (2).
(n1+n2)/2>1.49 (1)
(ν1+ν2)/2>60 (2)
Conditional (1) and conditional (2) are to be used for the refractive power of lens composition G1, G2 of two crescent-shaped of regulation object side and the condition of dispersion.By formula that satisfies condition simultaneously (1) and conditional (2), to compare with general material, disperse phase diminishes for refractive index, can correct aberration well.Particularly can correct the coma of downside well.In addition, the generation of aberration is had among this photographic lens ZL of distortion Gaussian type of considerable influence at the lens composition of object side, formula that satisfies condition (1) and conditional (2) especially can be brought into play effect to the rectification of aberration.
Among this external photographic lens ZL, is that n8, Abbe number are ν 8 at the positive lens G8 that establishes the most close compound lens G89 as side configuration to the refractive index of d line, the negative lens G9 of the most close compound lens G89 as side configuration is n9, when Abbe number is ν 9, preferably satisfies conditional shown below (3) and conditional (4) the refractive index of d line.
n8>n9 (3)
ν8>ν9 (4)
Conditional (3) and conditional (4) are positive lens G8 and the refractive power of negative lens G9 and the conditions of dispersion that is used to stipulate the compound lens G89 of the most close picture side configuration.By the formula of satisfying condition (3), can prevent that Po Zi from cutting down and the increase of (Petz ν al sum).Can carry out the rectification of aberration by the formula of satisfying condition (4) in addition.At this, when positive lens G8 being used the material of high index of refraction, exist and disperse to become tendency big, negative lens G9 becomes high index of refraction in order to correct aberration for the generation that suppresses coma, spherical aberration.Thereby amber cuts down now and increases.Therefore, by making the compound lens of the most close compound lens G89 as side configuration,, can prevent that also achromatism and amber from cutting down now and increase even use the material of high index of refraction for satisfy condition simultaneously formula (3) and conditional (4).In addition, more practical for the effect that makes present embodiment, preferably make the Abbe number ν 8 of positive lens G8 bigger more than 20 than the Abbe number ν 9 of negative lens G9, promptly satisfy following formula (a1).
ν8-ν9>20 (a1)
Radius-of-curvature at the face of the picture side of establishing front side negative lens composition G4 (among Fig. 1 for begin the 8th lens face of number from object side) is r8, and when the focal length of photographic lens ZL complete set was f, this photographic lens ZL preferably satisfied conditional shown below (5).
0.3<r8/f<0.5 (5)
Conditional (5) is to be used for the radius-of-curvature of face of picture side of regulation front side negative lens composition G4 with respect to the condition of the ratio of focal distance f.When the lower limit of conditional (5) was following, it is difficult that the rectification of coma becomes.The whole capability of back group strengthens in addition, and integral body can't be corrected spherical aberration well, thereby not preferred.On the contrary, when the higher limit of conditional (5) was above, Po Zi cut down and becomes big, is difficult to correct curvature of the image, thereby not preferred.
In addition, this photographic lens can be following focusing lens group also: the part of single or multiple lens compositions or lens composition is moved on optical axis direction, carry out from the focusing of infinity object to closer object.At this moment, focusing lens group also goes for automatic focus, is suitable for (ultrasonic motor etc.) motor driven that automatic focus is used.In the present embodiment, the most close compound lens G89 as side configuration and the other lenses of photographic lens ZL preferably constitute when focusing and move along optical axis with different speed, the spherical aberration in the time of can preventing to carry out the focusing to closer object and the defective of image planes.In addition, aperture diaphragm S moves along optical axis with front side negative lens composition G4 or rear side negative lens composition G5 when focusing.
The compound lens G89 of the most close picture side configuration is the focal length of f89, photographic lens complete set when being f at the focal length of further establishing this compound lens G89, satisfies conditional shown below (6).
1<f89/f<2 (6)
Conditional (6) is the condition of ratio that is used to stipulate the focal length of the focal length of compound lens G89 of the most close picture side configuration and photographic lens ZL complete set.Photographic lens is whole when the higher limit of conditional (6) is above maximizes.Under this external limited distance when focusing image planes change become big, be difficult to carry out from infinitely as far as in-plant aberration correction.In addition because displacement increases, function deterioration distance and not preferred.On the contrary, when the lower limit of conditional (6) is following, be difficult to carry out the rectification of the rectification of aberration, particularly spherical aberration, therefore not preferred.
The focal length of the photographic lens ZL of present embodiment under 35mm film size converts is about 60～150mm, is preferably about 80～90mm.In addition, the photographic lens ZL of present embodiment in looking like under the state minimum to the distance (back focal length) of image planes of side of the positive lens G9 that disposes from the most close picture side, more preferably is about 10～30mm.
The content of following record can suitably adopt in the scope of harmless optical property in addition.
At first lens face can be aspheric surface.At this moment, can be the aspheric surface of grinding, be that mould forms the glass mould aspheric surface of aspherical shape, resin-shaped become the compound aspheric aspheric surface arbitrarily of aspherical shape on the surface of glass with glass.Any one party of the face of the object side of at least one in the face of the picture side of the face of the object side of the face of the picture side of preferred front side negative lens composition G4 (being negative meniscus lens L4 among Fig. 1), rear side negative lens composition G5 (being biconcave lens L5 among Fig. 1), rear side positive lens composition G6 (being biconvex lens L6 among Fig. 1) and positive lens G8 (being biconvex lens L8 among Fig. 1) is an aspheric surface.Lens face can be diffraction surfaces in addition, and lens can be refractive index distribution lens (grin lens) or plastic lens.
In addition, aperture diaphragm S preferred disposition is between front side negative lens composition G4 (being negative meniscus lens L4 among Fig. 1) and rear side negative lens composition G5 (being biconcave lens L5 among Fig. 1), also can not be provided as the parts of aperture diaphragm, and replace its effect with the frame of lens.
And then on each lens face, have the antireflection film of high permeability by the wavelength region may that is applied to broad, can realize glimmering and ghost image reduces, the high optical property of high-contrast.
In Fig. 9 and Figure 10, show the formation of electronic stills camera 1 (abbreviating camera 1 later on as) as optical device with above-mentioned photographic lens ZL.This camera 1 is when pressing not shown power knob, the not shown shutter of photographic lens ZL is opened, by the light of photographic lens ZL gathering, and be disposed at upward imaging of the imaging apparatus C of image planes I (for example film, CCD, CMOS etc.) from the not shown body that is taken.The body image that is taken that is imaged on the imaging apparatus C is being disposed at demonstration on camera 1 LCD monitor 2 behind.The cameraman has determined to be taken when watching LCD monitor 2 behind the composition of body image, press release-push 3 and by imaging apparatus C to being taken the body image photography, and recorded and stored is in not shown storer.
In this camera 1, dispose: the auxiliary light portion 4 that when subject is dark, sends fill-in light; Wide-angle (W)-(T) button 5 of looking in the distance when variable-power optical system ZL is become from wide-angle side state (W) to telescope end state (T) times; And the function button 6 etc. that is used to carry out the various condition enactments of camera 1.
(second embodiment)
Following with reference to description of drawings preferred second embodiment of the present invention.As shown in figure 11, this photographic lens SL comprises front side lens combination GF with positive refractive power and the rear side lens group GR with positive refractive power successively along optical axis from object side, front side lens combination GF begins to comprise successively the first lens composition G1 with positive refractive power and has the second lens composition G2 of positive refractive power from the most close object side, and rear side lens group GR comprises the compound lens G89 that successively positive lens G8 and negative lens G9 is fitted and form from object side.By this structure, this photographic lens SL can be the Large Aperture Lenses of 25～30mm for effective diameter.In addition, by the most close as side configuration with the compound lens G89 that positive lens G8 and negative lens G9 fit and form, also have the achromatism effect at lens as the side configuration, integral body can be corrected aberration.Aberration change in the time of particularly can reducing focusing.Can prevent from the total reflection of light from light to be passed through well in these lens by this compound lens.
Embodiment as this photographic lens SL, as shown in figure 11, except the above-mentioned first lens composition G1, the second lens composition G2 and compound lens G89, between the object side of the picture side of the second lens composition G2 and compound lens G89, be disposed with from object side: convex surface is towards the 3rd lens composition G3 of the crescent-shaped of object side; Front side negative lens composition G4 with conduct the 4th lens composition of negative refractive power; Aperture diaphragm S; To have negative refractive power conduct the 5th lens composition rear side negative lens composition G5 and have the compound lens G56 that the rear side positive lens composition G6 of conduct the 6th lens composition of positive refractive power fits and to form; With the 7th lens composition G7 with positive refractive power.The preferred integral body of this photographic lens SL is made of 7 groups of 9 lens.
This photographic lens SL is that the lens distortion with so-called Gaussian type forms.In Gaussian type, lens roughly are the shape of symmetry before and after diaphragm, and therefore by its symmetry, the rectification of distortion aberration etc. is comparatively simple.In addition, this photographic lens SL, by (being first～the 3rd lens composition G1～G3) in Figure 11 at 3 lens compositions of object side configuration of the negative meniscus lens that relies on object side than aperture diaphragm S (among Figure 11 for as the front side negative lens composition G4 of the 4th lens composition), radius-of-curvature separately increases, and the generation of spherical aberration reduces.
Among this external photographic lens ZL, the first lens composition G1 and the second lens composition G2 all are preferably the crescent-shaped of convex surface towards object side.The 3rd lens composition G3 is preferably the crescent-shaped of convex surface towards object side.The 4th lens composition G4 as front side negative lens composition is preferably the crescent-shaped of convex surface towards object side.The 5th lens composition G5 and the 6th lens composition G6 are preferably the compound lens of fitting and forming.The 5th lens composition G5 as rear side negative lens composition is preferably the concave-concave shape in addition.The 6th lens composition G6 is preferably the biconvex shape.The 7th lens composition G7 is preferably the positive lens of biconvex shape or the convex surface positive concave-convex lens towards the picture side.And then, be preferably the biconvex shape at the positive lens G8 of the most close compound lens G89 as side configuration.
In addition as mentioned above, when disposing the 3rd lens composition G3 of the refractive power with plus or minus between the second lens composition G2 and the 4th lens composition G4, the 3rd lens composition G3 preferably is made of 1～2 lens.When disposing the 7th lens composition G7 between this external the 5th lens composition G5 and the compound lens G89, the 7th lens composition preferably is made of 1～2 lens, and preferably has positive refractive power.
Next enumerate the condition that two example explanations are used to constitute this photographic lens SL.The condition that first example relates at first is described.This photographic lens SL, from infinity when closer object is focused, front side lens combination GF and rear side lens group GR move along the optical axis direction object side with different amount of movements, so that the interval between front side lens combination GF and the rear side lens group GR increases, if the focal length of front side lens combination GF is the focal length of fF, rear side lens group GR when being fR, preferably satisfy conditional shown below (7).
0.79<fF/fR<1.58 (7)
Conditional (7) is the conditional of ratio that is used for the suitable focal length of regulation front side lens combination GF and rear side lens group GR.When the higher limit of conditional (7) was above, the spherical aberration and the coma that are produced by rear side lens group GR monomer became big.It is big that the change of each aberration when result causes focusing becomes, thereby not preferred.In addition, in order to realize effect of the present invention effectively, the higher limit that preferably makes conditional (7) is 1.52.In order to realize effect of the present invention more effectively, the higher limit that more preferably makes conditional (7) is 1.46 in addition.And then in order to realize effect of the present invention more effectively, the higher limit that further preferably makes conditional (7) is 1.40.On the contrary, when the lower limit of conditional (7) was following, the refractive power of the integral body of front side lens combination GF strengthened, and can't correct spherical aberration well as lens combination integral body, and is therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (7) is 0.85.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (7) is 0.90 in addition.And then in order to realize effect of the present invention more effectively, the lower limit that further preferably makes conditional (7) is 0.95.
In addition, the front side lens combination GF of the photographic lens SL of second embodiment and rear side lens group GR, from middle photo distance when closer object is focused, preferably with different amount of movements than moving along optical axis.By this structure, from infinitely as far as in-plant photo distance Zone Full, correcting spherical aberration and curvature of the image well.In addition, aperture diaphragm S moves along optical axis with the 4th lens composition G4 or the 5th lens composition G5 when focusing.
Among this external photographic lens SL, the focal length of establishing the negative lens G9 among the rear side lens group GR is the focal length of f9, this photographic lens SL complete set when being f, preferably satisfies conditional shown below (8).
0.78<(-f9)/f<1.59 (8)
Conditional (8) is the conditional of ratio that is used for the focal distance f of the focal distance f 9 of negative lens G9 of regulation rear side lens group GR and photographic lens ZL complete set.When the higher limit of conditional (8) was above, it is big that the multiplying power chromatic aberation that rear side lens group GR monomer is produced becomes.The change of the multiplying power chromatic aberation the when result causes focusing increases, and is therefore not preferred.In addition, in order to realize effect of the present invention effectively, the higher limit that preferably makes conditional (8) is 1.53.In order to realize effect of the present invention more effectively, the higher limit that more preferably makes conditional (8) is 1.47 in addition.And then in order to realize effect of the present invention more effectively, the higher limit that further preferably makes conditional (8) is 1.41.On the contrary, when the lower limit of conditional (8) was following, the multiplying power chromatic aberation that rear side lens group GR monomer is produced worsened, and is therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (8) is 0.85.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (8) is 0.90 in addition.And then in order to realize effect of the present invention more effectively, the lower limit that further preferably makes conditional (8) is 0.94.
Among this external photographic lens SL, the radius-of-curvature of establishing the face (the 8th lens face for beginning from object side to count among Figure 11) of the picture side of the 4th lens composition G4 is r8, when the focal length of photographic lens SL complete set is f, preferably satisfies conditional shown below (9).
0.30<r8/f<0.50 (9)
Conditional (9) is to be used to stipulate that the radius-of-curvature r8 of face of picture side of the 4th lens composition G4 is with respect to the conditional of the ratio of focal distance f.When the higher limit of conditional (9) was above, Po Zi cuts down and becomes big, is difficult to correct curvature of the image, and was therefore not preferred.In addition, in order to realize effect of the present invention effectively, the higher limit that preferably makes conditional (9) is 0.45.In order to realize effect of the present invention more effectively, the higher limit that more preferably makes conditional (9) is 0.40 in addition.And then in order to realize effect of the present invention more effectively, the higher limit that further preferably makes conditional (9) is 0.35.On the contrary, when the lower limit of conditional (9) is following, be difficult to correct coma.In addition, the refractive power of rear side lens group GR integral body strengthens, and can't correct spherical aberration well as lens combination integral body, and is therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (9) is 0.31.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (9) is 0.32 in addition.
Among this external photographic lens SL, if the most close negative lens G9 as side configuration of the compound lens G89 that rear side lens group GR is comprised is that n9, Abbe number are ν 9 to the refractive index of d line, the positive lens G8 that fits at the object side of this negative lens G9 is n8, when Abbe number is ν 8, preferably satisfies conditional shown below (10) and conditional (11) the refractive index of d line.
n8>n9 (10)
ν8>ν9 (11)
Conditional (10) and conditional (11) are positive lens G8 and the refractive power of negative lens G9 and the conditions of Abbe number that is used to stipulate the compound lens G89 of the most close picture side configuration.By the formula of satisfying condition (10), can prevent that Po Zi from cutting down and increase.Can carry out the good rectification of aberration in addition by the formula of satisfying condition (11).At this, when for the generation that suppresses coma, spherical aberration positive lens G8 being used the material of high index of refraction, Abbe number diminishes, negative lens G9 becomes high index of refraction in order to correct aberration.Therefore amber cuts down now and increases.But, constitute formula that satisfies condition simultaneously (10) and conditional (11) by the compound lens G89 that makes rear side lens group GR, even use the material of high index of refraction, can prevent that also chromatic aberration correction and amber from cutting down now and increase.In addition, more practical for the effect that makes present embodiment, in conditional (11), preferably make the Abbe number ν 8 of positive lens G8 bigger more than 20 than the Abbe number ν 9 of negative lens G9, promptly satisfy following formula (a2).
ν8-ν9>20 (a2)
This photographic lens SL is the focal length of fR, this photographic lens SL complete set when being f at the focal length of establishing rear side lens group GR, preferably satisfies conditional shown below (12).
1.00<fR/f<2.00 (12)
Conditional (12) is the conditional of ratio that is used for the focal length of the focal distance f R of regulation rear side lens group GR and photographic lens SL complete set.When the higher limit of conditional (12) was above, photographic lens SL is whole to maximize.When focusing under this external limited distance, it is big that the change of image planes becomes, and is difficult to carry out from infinitely as far as in-plant aberration correction, therefore not preferred.In addition, in order to realize effect of the present invention effectively, the higher limit that preferably makes conditional (12) is 1.90.In order to realize effect of the present invention more effectively, the higher limit that more preferably makes conditional (12) is 1.80 in addition.And then in order to realize effect of the present invention more effectively, the higher limit that further preferably makes conditional (12) is 1.60.On the contrary, when the lower limit of conditional (12) is following, be difficult to correct spherical aberration, therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (12) is 1.10.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (12) is 1.20 in addition.
Next the condition that second example relates to is described.At first, this photographic lens SL, from infinity when closer object is focused, front side lens combination GF and rear side lens group GR move along the optical axis direction object side with different amount of movements, so that the interval between front side lens combination GF and the rear side lens group GR increases, if the first lens composition G1 is ν 1 to the Abbe number of d line, the second lens composition G2 is ν 2 to the Abbe number of d line, from the amount of movement of the infinity focusing front side lens combination GF during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing rear side lens group GR during for photography multiplying power-0.01 times is γ R1, preferably satisfy conditional shown below (13) and conditional (14).In addition, when the first lens composition G1 or the second lens composition G2 were made of compound lens, its Abbe number was the mean value of the Abbe number of the lens of this compound lens of formation.
(ν1+ν2)/2>60 (13)
0.35<γR1/γF1<0.80?(14)
Conditional (13) is to be used for regulation front side lens combination GF to have the first lens composition G1 of positive refractive power and the conditional of the combination of the optical material characteristic of the second lens composition G2 with positive refractive power.When the lower limit of conditional (13) is following, at the lens composition of close object side aberration is produced among this photographic lens SL of the distortion Gaussian type with considerable influence, the undercorrection of multiplying power chromatic aberation is difficult to keep good performance, and is therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (13) is 61.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (13) is 63 in addition.And then in order to realize effect of the present invention more effectively, the lower limit that further preferably makes conditional (13) is 65.
Conditional (14) is the conditional of proper range of the mobile ratio of the focusing when being used for the middle photo distance of regulation front side lens combination GF and rear side lens group GR.When the higher limit of conditional (14) was above, coma and curvature of the image become and correct surplus, and be therefore not preferred.In addition, in order to realize effect of the present invention effectively, the higher limit that preferably makes conditional (14) is 0.77.In order to realize effect of the present invention more effectively, the higher limit that more preferably makes conditional (14) is 0.74 in addition.And then in order to realize effect of the present invention more effectively, the higher limit that further preferably makes conditional (14) is 0.71.On the contrary, when the lower limit of conditional (14) is following, be difficult to correct coma and curvature of the image, therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (14) is 0.39.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (14) is 0.43 in addition.And then in order to realize effect of the present invention more effectively, the lower limit that further preferably makes conditional (14) is 0.47.
In addition, in this photographic lens SL, when establishing the first lens composition G1 to be n1, the second lens composition G2 to the refractive index of d line being n2 to the refractive index of d line, preferably satisfy conditional shown below (15).In addition, when the first lens composition G1 or the second lens composition G2 were made of compound lens, its refractive index was the mean value of the refractive index of the lens of this compound lens of formation.
(n1+n2)/2>1.49 (15)
Conditional (15) is the conditional of refractive index of lens composition G1, G2 that is used for two crescent-shaped of regulation object side.Can correct coma and multiplying power chromatic aberation well by the formula of satisfying condition (15).In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (15) is 1.52.In addition, in order to realize effect of the present invention more effectively, more preferably the lower limit of conditional (15) is 1.55.And then in order to realize effect of the present invention more effectively, the lower limit that further preferably makes conditional (15) is 1.59.
In addition, front side lens combination GF among the photographic lens SL of present embodiment and rear side lens group GR, from middle photo distance when closer object is focused, preferably with different amount of movements than moving along optical axis.By this structure, from infinitely correcting spherical aberration and curvature of the image well as far as in-plant photo distance Zone Full.In addition, when focusing, aperture diaphragm S moves along optical axis with front side negative lens composition G4 or rear side negative lens composition G5.
Among this external photographic lens SL, during for photography multiplying power-0.07 times, the amount of movement of establishing front side lens combination GF is γ F2, when the amount of movement of rear side lens group GR is γ R2, preferably satisfies conditional shown below (16) from infinity focusing.
0.35<γR2/γF2<0.50 (16)
Conditional (16) is the conditional of proper range that is used for the mobile ratio of regulation front side lens combination GF and the focusing of rear side lens group GR when close-range photography.When the higher limit of conditional (16) was above, coma and curvature of the image become and correct surplus, and be therefore not preferred.In addition, in order to realize effect of the present invention effectively, the higher limit that preferably makes conditional (16) is 0.48.In order to realize effect of the present invention more effectively, the higher limit that more preferably makes conditional (16) is 0.46 in addition.On the contrary, when the lower limit of conditional (16) is following, be difficult to correct coma and curvature of the image, therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (16) is 0.36.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (16) is 0.37 in addition.
Among this external photographic lens SL, if the most close negative lens G9 as side configuration of compound lens G89 is that n9, Abbe number are ν 9 to the refractive index of d line, the positive lens G8 that fits at the object side of this negative lens G9 is n8, when Abbe number is ν 8, preferably satisfies conditional shown below (17) and conditional (18) the refractive index of d line.
n8>n9 (17)
ν8>ν9 (18)
Conditional (17) and conditional (18) are positive lens G8 and the refractive power of negative lens G9 and the conditions of Abbe number that is used to stipulate the compound lens G89 of the most close picture side configuration.By the formula of satisfying condition (17), can prevent that Po Zi from cutting down and increase.Can carry out the good rectification of aberration in addition by the formula of satisfying condition (18).At this, when for the generation that suppresses coma, spherical aberration positive lens G8 being used the material of high index of refraction, Abbe number diminishes, negative lens G9 becomes high index of refraction in order to correct aberration.Therefore amber cuts down now and increases.But, constitute formula that satisfies condition simultaneously (17) and conditional (18) by the compound lens G89 that makes rear side lens group GR, even use the material of high index of refraction, can prevent that also chromatic aberration correction and amber from cutting down now and increase.In addition, more practical for the effect that makes present embodiment, in conditional (18), preferably make the Abbe number ν 8 of positive lens G8 bigger more than 20 than the Abbe number ν 9 of negative lens G9, promptly satisfy following formula (a3).
ν8-ν9>20 (a3)
In this photographic lens SL, the radius-of-curvature of further establishing the face (the 8th lens face for beginning from object side to count among Fig. 1) of the picture side of front side negative lens composition G4 is r8, when the focal length of photographic lens SL complete set is f, preferably satisfy conditional shown below (19).
0.30<r8/f<0.50 (19)
Conditional (19) is to be used for the radius-of-curvature of face of picture side of regulation front side negative lens composition G4 with respect to the conditional of the ratio of focal distance f.When the higher limit of conditional (19) was above, Po Zi cuts down and becomes big, is difficult to correct curvature of the image, and was therefore not preferred.In addition, in order to realize effect of the present invention effectively, the higher limit that preferably makes conditional (19) is 0.45.In order to realize effect of the present invention more effectively, the higher limit that more preferably makes conditional (19) is 0.40 in addition.And then in order to realize effect of the present invention more effectively, the higher limit that further preferably makes conditional (19) is 0.35.On the contrary, when the lower limit of conditional (19) is following, be difficult to correct coma.In addition, the ability of rear side lens group GR strengthens, and can't correct spherical aberration well as a whole, and is therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (19) is 0.31.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (19) is 0.32 in addition.
This photographic lens SL is the focal length of fR, this photographic lens SL complete set when being f at the focal length of establishing rear side lens group GR, preferably satisfies conditional shown below (20).
1.00<fR/f<2.00 (20)
Conditional (20) is the conditional of ratio that is used for the focal length of the focal length of regulation rear side lens group GR and photographic lens SL complete set.When the higher limit of conditional (20) was above, photographic lens SL is whole to maximize.When focusing under this external limited distance, it is big that the change of image planes becomes, and is difficult to carry out from infinitely as far as in-plant aberration correction, therefore not preferred.In addition, the mobile quantitative change that is used to focus is big, and lens barrel structure maximizes, and is therefore not preferred.In addition, in order to realize effect of the present invention effectively, the higher limit that preferably makes conditional (20) is 1.90.In order to realize effect of the present invention more effectively, the higher limit that more preferably makes conditional (20) is 1.80 in addition.And then in order to realize effect of the present invention more effectively, the higher limit that further preferably makes conditional (20) is 1.60.On the contrary, when the lower limit of conditional (20) is following, be difficult to correct spherical aberration, therefore not preferred.In addition, in order to realize effect of the present invention effectively, the lower limit that preferably makes conditional (20) is 1.10.In order to realize effect of the present invention more effectively, the lower limit that more preferably makes conditional (20) is 1.20 in addition.
In addition, this photographic lens SL, for the photography that the shake because of hand causes is failed, in lens combination, be assembled with the shake detection system and the driver element of the shake that detects lens combination, whole or part by making a lens combination in the lens combination that constitutes lens combination is as the vibration-proof lens group and eccentric the setting, thereby shake the mode that (change of image planes position) corrects with the picture that the shake by the detected lens combination of shake detection system is caused, by drive unit drives vibration-proof lens group, make image shift, thereby can correct the picture shake.As mentioned above, the photographic lens SL of second embodiment can be used as so-called anti-dither optical system and plays a role.
In addition, lens combination is made of two movable group in second embodiment, but also can add the other lenses group between individual lens combination, perhaps with lens combination be adjacent to additional other lenses group as side or object side.
The focal length of the photographic lens SL of second embodiment under 35mm film size converts is about 60～150mm, is preferably about 80～90mm.In addition, the photographic lens SL of second embodiment in looking like under the state minimum to the distance (back focal length) of image planes of side of the positive lens G9 that disposes from the most close picture side, more preferably is about 10～30mm.
The content of following record can suitably adopt in the scope of harmless optical property in addition.
At first lens face can be aspheric surface.At this moment, can be the aspheric surface of grinding, be that mould forms the glass mould aspheric surface of aspherical shape, resin-shaped become the compound aspheric aspheric surface arbitrarily of aspherical shape on the surface of glass with glass.Preferably as the face of the picture side of the 4th lens composition G4 of front side negative lens composition (being negative meniscus lens L4 among Figure 11), be aspheric surface as the face of the object side of the 5th lens composition G5 (being biconcave lens L5 among Figure 11) of rear side negative lens composition, as any one party of the face of the object side of at least one and positive lens G8 (being biconvex lens L8 among Figure 11) in the face of the picture side of the 6th lens composition G6 (being biconvex lens L6 among Figure 11) of rear side positive lens composition.Lens face can be diffraction surfaces in addition, and lens can be refractive index distribution lens (grin lens) or plastic lens.
In addition, aperture diaphragm S preferred disposition is between the 4th lens composition G4 (being negative meniscus lens L4 among Figure 11) and the 5th lens composition G5 (being biconcave lens L5 among Figure 11) as rear side negative lens composition as front side negative lens composition, also can not be provided as the parts of aperture diaphragm, and replace its effect with the frame of lens.
And then on each lens face, have the antireflection film of high permeability by the wavelength region may that is applied to broad, can realize glimmering and ghost image reduces, the high optical property of high-contrast.
Showing electronic stills camera 101 as the optical device with above-mentioned photographic lens SL in Figure 19 constitutes.This electronic stills camera 101 is when pressing not shown power knob, the not shown shutter of photographic lens SL is opened, by the light of photographic lens SL gathering, and be disposed at upward imaging of the imaging apparatus C of image planes I (for example film, CCD, CMOS etc.) from the not shown body that is taken.The body image that is taken that is imaged on the imaging apparatus C is being disposed at demonstration on electronic stills camera 101 LCD monitor 2 behind.The cameraman has determined to be taken when watching LCD monitor 2 behind the composition of body image, press release-push 3 and by imaging apparatus C to being taken the body image photography, and recorded and stored is in not shown storer.In addition, this photographic lens SL can be applied to the replacing lens that can load and unload on camera body.
The following summary that the manufacture method of photographic lens is described with reference to Figure 20.
At first, each entirety of lens package is arrived in the lens barrel cylindraceous.With each entirety of lens package in lens barrel the time, can along optical axis successively one by one with each entirety of lens package in lens barrel, also can keep part or all lens integratedly, then in being assembled into the lens barrel parts with holding member.At this, in the present embodiment, the configuration of each lens begins to be arranged in order from object side: the first lens composition L1 with positive refractive power; The second lens composition L2 with positive refractive power; The 3rd lens composition L3 with positive refractive power; The 4th lens composition L4 with negative refractive power; The 5th lens composition L5 with negative refractive power; The 6th lens composition L6 with positive refractive power; The 7th lens composition L7 with positive refractive power; And the compound lens that positive lens L8 and negative lens L9 are fitted and form.Preferably with after each entirety of lens package is in the lens barrel, confirm whether can form the picture of object under the state of each entirety of lens package in the lens barrel.
After as mentioned above photographic lens being assembled, the exercises of photographic lens are confirmed.Example as exercises comprises: carry out moving along the focusing that optical axis direction moves to the lens combination of the focusing of closer object from infinity; Make at least a portion lens move with the hand shake remedial action of composition etc. with direction vertical with optical axis.In addition, the affirmation of exercises is arbitrarily in proper order.
In addition, for easy to understand ground explanation the present invention, the inscape of embodiment is illustrated, but the present invention is not limited thereto.
(embodiment)
Below, with reference to accompanying drawing first of first embodiment of the invention～the 4th embodiment is described.Fig. 1, Fig. 3, Fig. 5 and Fig. 7 illustrate separately photographic lens ZL of first～the 4th embodiment (cut-open view of the formation of ZL1～ZL4), in the focusing of these photographic lenss ZL1～ZL4, the direction that when closer object is focused this lens combination is moved along optical axis from infinity is shown with arrow.As this Fig. 1, Fig. 3, Fig. 5 and shown in Figure 7, any of the photographic lens ZL1～ZL4 of present embodiment comprises from object side successively along optical axis all as mentioned above: the first lens composition G1 with positive refractive power; The second lens composition G2 with positive refractive power; Convex surface is towards the 3rd lens composition G3 of the crescent-shaped of object side; Front side negative lens composition (the 4th lens composition) G4 with negative refractive power; Aperture diaphragm S; To have rear side negative lens composition (the 5th lens composition) G5 of negative refractive power and have the compound lens G56 that rear side positive lens composition (the 6th lens composition) G6 of positive refractive power fits and to form; The 7th lens composition G7 with positive refractive power; The compound lens G89 that positive lens G8 and negative lens G9 are fitted and form; With filter set FL.At this, filter set FL is made of low-pass filter, infrared cutoff filter etc.Image planes I goes up imaging at imaging apparatus C (film, CCD, CMOS etc.) as shown in figure 10.
(first embodiment)
Fig. 1 is the figure of formation that the photographic lens ZL1 of first embodiment of the invention is shown.First embodiment is the embodiment of first embodiment.In the photographic lens ZL1 of this Fig. 1, the first lens composition G1 is made of the positive concave-convex lens L1 of convex surface towards object side, the second lens composition G2 is made of the positive concave-convex lens L2 of convex surface towards object side, the 3rd lens composition G3 is made of the positive concave-convex lens L3 of convex surface towards object side, front side negative lens composition (the 4th lens composition) G4 is made of the negative meniscus lens L4 of convex surface towards object side, compound lens G56 fits by the rear side negative lens composition G5 (the 5th lens composition) that will be made of biconcave lens L5 with by the rear side positive lens composition G6 (the 6th lens composition) that biconvex lens L6 constitutes and constitutes, the 7th lens composition G7 is made of biconvex positive lens L7, and compound lens G89 fits by the 8th lens G8 that will be made of biconvex lens L8 with by the 9th lens G9 that biconcave lens L9 constitutes and constitutes.
From carrying out to in-plant focusing is following at a distance: photographic lens ZL integral body is divided into lens composition G1～G7, and these 2 groups of compound lens G89, and it is moved to object side respectively.At this moment, aperture diaphragm S moves along optical axis with front side negative lens composition G4, rear side negative lens composition G5 when focusing.In addition, in the translational speed during focusing, (G1～G7) moves faster than the lens combination (compound lens G89) of rear side the lens combination of front side.
In following table 1, show the value of each parameter of first embodiment.In this table 1, f is that focal length, FNO are that F number, 2 ω are the visual angle.And then the face sequence number is the sequence number of the lens face that begins along the direct of travel of light, from object side, the interval till face is spaced apart from each optical surface to next optical surface on optical axis, and refractive index and Abbe number are respectively with respect to the d line (value of λ=587.6nm).In addition, the lens total length represents that infinity when focusing begins the distance on optical axis till the image planes from first of lens face.Wherein, below the focal distance f, radius-of-curvature, face put down in writing in all each parameter value at interval and the unit of other length generally adopt " mm ", yet also can access equal optical property owing to amplify pro rata or dwindle optical system pro rata, so unit is not limited thereto.In addition, radius-of-curvature 0.0000 expression plane, the refractive index of air is 1.00000 to be omitted.In addition, also be identical among the explanation of the explanation of these symbols and each parameter list embodiment afterwards.
(table 1)
f＝32.0
F.NO＝1.2
2ω＝29.9
Image height=8.5
Total length=54.6
Face sequence number radius-of-curvature face is the refractive index Abbe number at interval
1 28.9228 4.30 1.5924 68.36
2 228.3618 0.10
3 26.0101 3.39 1.5924 68.36
4 63.1641 0.10
5 19.3125 4.33 1.8160 46.62
6 20.7366 1.70
7 60.3267 1.30 1.6727 32.10
8 10.9478 4.14
9 0.0000 4.55 (aperture diaphragms)
10 -12.1627 1.00 1.6727 32.10
11 69.4239 5.19 1.8830 40.76
12 -20.9084 0.10
13 270.4986 2.85 1.7550 52.32
14 -37.4965 (d1)
15 46.6626 4.50 1.8830 40.76
16 -25.9360 2.99 1.7618 26.52
17 258.6980 (d2)
18 0.0000 1.00 1.5168 64.10
19 0.0000 1.50
20 0.0000 1.87 1.5168 64.10
21 0.0000 0.40
22 0.0000 0.70 1.5168 64.10
23 0.0000 0.50
In this first embodiment, the axle of the 7th lens composition G7 and the 8th lens G8 (compound lens G89) is gone up the axle of airspace d1 and the 9th lens composition G9 and filter set FL and is gone up airspace d2, changes when focusing.Infinity has been shown in the following table 2, has reached the variable interval under the photography multiplying power 1/13.6.
(table 2)
The photography multiplying power
Infinity 1/13.6
d1 0.10 2.05
d2 7.98 9.55
Following table 3 illustrates each the conditional respective value among this first embodiment.In addition in this table 3, n1 represents the refractive index of the first lens composition G1 to the d line, the Abbe number of ν 1 this first lens composition of expression G1, n2 represents the refractive index of the second lens composition G2 to the d line, the Abbe number of ν 2 this second lens composition of expression G2, n8 represents the refractive index of positive lens G8 to the d line, the Abbe number of ν 8 this positive lens of expression G8, n9 represents the refractive index of negative lens G9 to the d line, the Abbe number of ν 9 this negative lens of expression G9, r8 represents the radius-of-curvature of octahedral of the picture side of front side negative lens composition G4, and f represents the focal length of photographic lens ZL complete set.The explanation of above symbol is also identical in following embodiment.
(table 3)
(1)(n1+n2)/2＝1.5920
(2)(ν1+ν2)/2＝68.36
(3)n8＝1.8830
n9＝1.7618
(4)ν8＝40.76
ν9＝26.52
(5)r8/f＝0.34
(6)f89/f＝1.51
Fig. 2 shows each aberration diagram of first embodiment.Fig. 2 A is each aberration diagram under the infinity focusing state, and Fig. 2 B is each aberration diagram under the limited distance focusing state.In each aberration diagram, NA represents numerical aperture, and Y represents image height, and d represents that (λ=587.6nm), g represent that (λ=435.6nm), C represent that (λ=656.3nm), F represent F line (λ=486.1nm) to the C line to the g line to the d line.In addition, in the aberration diagram of astigmatism was shown, solid line was represented sagittal image surface, and dotted line is represented meridianal image surface.And then in the aberration diagram of spherical aberration was shown, solid line was represented spherical aberration, and dotted line is represented sine condition.In addition, the explanation of this aberration diagram also is identical in following each embodiment that illustrates.Like this, can know that in first embodiment, each aberration obtains good rectification under each focusing state, has good imaging performance by each aberration diagram.
(second embodiment)
Fig. 3 is the figure of formation that the photographic lens ZL2 of second embodiment of the invention is shown.Second embodiment is the embodiment of first embodiment.In the photographic lens ZL2 of this Fig. 3, the first lens composition G1 is made of the positive concave-convex lens L1 of convex surface towards object side, the second lens composition G2 is made of the positive concave-convex lens L2 of convex surface towards object side, the 3rd lens composition G3 is made of the positive concave-convex lens L3 of convex surface towards object side, front side lens composition (the 4th lens composition) G4 is made of the negative meniscus lens L4 of convex surface towards object side, compound lens G56 fits by the rear side negative lens composition G5 (the 5th lens composition) that will be made of biconcave lens L5 with by the rear side positive lens composition G6 (the 6th lens composition) that biconvex lens L6 constitutes and constitutes, the 7th lens composition G7 is made of towards the positive concave-convex lens L7 as side convex surface, and compound lens G89 fits by the 8th lens G8 that will be made of biconvex lens L8 with by the 9th lens G9 that convex surface constitutes towards the negative meniscus lens L9 as side and constitutes.
From carrying out to in-plant focusing is following at a distance: photographic lens ZL integral body is divided into these 3 groups of lens composition G1～G4, lens composition G5～G7 and compound lens G89, and it is moved to object side respectively.At this moment, aperture diaphragm S is when focusing, and negative lens composition G4 moves along optical axis with the front side.In addition, the translational speed during focusing moves according to the order of lens composition G1～G4, lens composition G5～G7, compound lens G89 with accelerating.
In following table 4, show the value of each parameter of second embodiment.
(table 4)
f＝32.0
F.NO＝1.2
2ω＝29.9
Image height=8.5
Total length=54.4
Face sequence number radius-of-curvature face is the refractive index Abbe number at interval
1 37.0000 3.53 1.5924 68.36
2 234.8452 0.10
3 24.4487 3.93 1.5924 68.36
4 79.8238 0.10
5 19.5757 5.63 1.8160 46.62
6 19.2626 1.57
7 48.1037 0.80 1.6727 32.10
8 10.9088 4.05
9 0.0000 (d1) (aperture diaphragm)
10 -12.2741 0.80 1.6989 30.13
11 59.2157 5.08 1.8830 40.76
12 -19.1818 0.10
13 -122.2510 2.09 1.7550 52.32
14 -42.5780 (d2)
15 38.5205 4.67 1.8830 40.76
16 -25.0706 4.03 1.7618 26.52
17 -223.2770 (d3)
18 0.0000 1.00 1.5168 64.10
19 0.0000 1.50
20 0.0000 1.87 1.5168 64.10
21 0.0000 0.40
22 0.0000 0.70 1.5168 64.10
23 0.0000 0.50
In this second embodiment, the axle that the axle of front side negative lens composition G4 and rear side negative lens composition G5 is gone up airspace d1, the 7th lens composition G7 and the 8th lens G8 is gone up the axle of airspace d2 and the 9th lens composition G9 and filter set FL and is gone up airspace d3, changes when focusing.Infinity has been shown in the following table 5, has reached the variable interval under the photography multiplying power 1/13.6.
(table 5)
The photography multiplying power
Infinity 1/13.6
d1 4.23 4.62
d2 0.1 1.9
d3 7.59 9.52
Following table 6 illustrates each the conditional respective value among this second embodiment.
(table 6)
(1)(n1+n2)/2＝1.5920
(2)(ν1+ν2)/2＝68.36
(3)n8＝1.8830
n9＝1.7618
(4)ν8＝40.76
ν9＝26.52
(5)r8/f＝0.34
(6)f89/f＝1.03
Fig. 4 shows each aberration diagram of second embodiment.Fig. 4 A is each aberration diagram under the infinity focusing state, and Fig. 4 B is each aberration diagram under the limited distance focusing state.Like this, can know that in a second embodiment, each aberration obtains good rectification under each focusing state, has good imaging performance by each aberration diagram.
(the 3rd embodiment)
Fig. 5 is the figure of formation that the photographic lens ZL3 of third embodiment of the invention is shown.The 3rd embodiment is the embodiment of first embodiment.In the photographic lens ZL3 of this Fig. 5, the first lens composition G1 is made of the positive concave-convex lens L1 of convex surface towards object side, the second lens composition G2 is made of the positive concave-convex lens L2 of convex surface towards object side, the 3rd lens composition G3 is made of the positive concave-convex lens L3 of convex surface towards object side, front side negative lens composition (the 4th lens composition) G4 is made of the negative meniscus lens L4 of convex surface towards object side, compound lens G56 fits by the rear side negative lens composition G5 (the 5th lens composition) that will be made of biconcave lens L5 with by the rear side positive lens composition G6 (the 6th lens composition) that biconvex lens L6 constitutes and constitutes, the 7th lens composition G7 is made of biconvex positive lens L7, and compound lens G89 fits by the 8th lens G8 that will be made of biconvex lens L8 with by the 9th lens G9 that biconcave lens L9 constitutes and constitutes.
From carrying out to in-plant focusing is following at a distance: photographic lens ZL integral body is divided into these 3 groups of lens composition G1～G4, lens composition G5～G7 and compound lens G89, and it is moved to object side respectively.At this moment, aperture diaphragm S is when focusing, and negative lens composition G4 moves along optical axis with the front side.In addition, the translational speed during focusing moves according to the order of lens composition G1～G4, lens composition G5～G7, compound lens G89 with accelerating.
In following table 7, show the value of each parameter of the 3rd embodiment.
(table 7)
f＝32.0
F.NO＝1.2
2ω＝29.9
Image height=8.5
Total length=57.2
Face sequence number radius-of-curvature face is the refractive index Abbe number at interval
1 40.3452 3.29 1.4970 81.54
2 223.9692 0.10
3 28.3068 3.84 1.5924 68.36
4 127.2352 0.10
5 20.6648 5.85 1.8160 46.62
6 23.4794 1.55
7 46.6282 1.47 1.6727 32.10
8 11.4452 4.07
9 0.0000 (d1) (aperture diaphragm)
10 -12.5129 1.00 1.6989 30.13
11 77.8330 6.92 1.8830 40.76
12 -21.0744 0.10
13 174.0421 3.16 1.7550 52.32
14 -39.3712 (d2)
15 34.3162 4.76 1.8830 40.76
16 -36.3229 1.30 1.7618 26.52
17 61.4220 (d3)
18 0.0000 1.00 1.5168 64.10
19 0.0000 1.50
20 0.0000 1.87 1.5168 64.1
21 0.0000 0.40
22 0.0000 0.70 1.5168 64.1
23 0.0000 0.50
In the 3rd embodiment, the axle that the axle of front side negative lens composition G4 and rear side negative lens composition G5 is gone up airspace d1, the 7th lens composition G7 and the 8th lens G8 is gone up the axle of airspace d2 and the 9th lens composition G9 and filter set FL and is gone up airspace d3, changes when focusing.Infinity has been shown in the following table 8, has reached the variable interval under the photography multiplying power 1/13.6.
(table 8)
The photography multiplying power
Infinity 1/13.6
d1 5.02 5.96
d2 0.10 2.72
d3 8.64 9.77
Each conditional respective value of the 3rd embodiment has been shown in the following table 9.
(table 9)
(1)(n1+n2)/2＝1.5447
(2)(ν1+ν2)/2＝74.95
(3)n8＝1.8830
n9＝1.7618
(4)ν8＝40.76
ν9＝26.52
(5)r8/f＝0.36
(6)f89/f＝1.78
Fig. 6 shows each aberration diagram of the 3rd embodiment.Fig. 6 A is each aberration diagram under the infinity focusing state, and Fig. 6 B is each aberration diagram under the limited distance focusing state.Like this, can know that in the 3rd embodiment, each aberration obtains good rectification under each focusing state, has good imaging performance by each aberration diagram.
(the 4th embodiment)
Fig. 7 is the figure of formation that the photographic lens ZL4 of fourth embodiment of the invention is shown.The 4th embodiment is the embodiment of first embodiment.In the photographic lens ZL4 of this Fig. 7, the first lens composition G1 is made of the positive concave-convex lens L1 of convex surface towards object side, the second lens composition G2 is made of the positive concave-convex lens L2 of convex surface towards object side, the 3rd lens composition G3 is made of the positive concave-convex lens L3 of convex surface towards object side, front side negative lens composition (the 4th lens composition) G4 is made of the negative meniscus lens L4 of convex surface towards object side, compound lens G56 fits by the rear side negative lens composition G5 (the 5th lens composition) that will be made of biconcave lens L5 with by the rear side positive lens composition G6 (the 6th lens composition) that biconvex lens L6 constitutes and constitutes, the 7th lens composition G7 is made of biconvex positive lens L7, and compound lens G89 fits by the 8th lens G8 that will be made of biconvex lens L8 with by the 9th lens G9 that biconcave lens L9 constitutes and constitutes.
From carrying out to in-plant focusing is following at a distance: photographic lens ZL integral body is divided into these 3 groups of lens composition G1～G4, lens composition G5～G7 and compound lens G89, and it is moved to object side respectively.At this moment, aperture diaphragm S is when focusing, and negative lens composition G4 moves along optical axis with the front side.In addition, the translational speed during focusing moves according to the order of lens composition G1～G4, lens composition G5～G7, compound lens G89 with accelerating.
In following table 10, show the value of each parameter of the 4th embodiment.
(table 10)
f＝32.0
F.NO＝1.2
2ω＝29.9
Image height=8.5
Total length=58.7
Face sequence number radius-of-curvature face is the refractive index Abbe number at interval
1 45.1295 3.37 1.5924 68.36
2 1436.3282?0.10
3 31.5479 3.39 1.5924 68.36
4 112.1635 0.10
5 21.2165 5.13 1.8160 46.62
6 22.6838 2.49
7 91.6166 0.80 1.6477 33.79
8 13.6500 3.88
9 0.0000 (d1) (aperture diaphragm)
10 -13.6776 0.80 1.6989 30.13
11 309.5468 6.84 1.8830 40.76
12 -21.5615 0.10
13 184.5845 2.86 1.7550 52.32
14 -44.1935 (d2)
15 38.4025 5.26 1.8830 40.76
16 -33.3169 4.61 1.7618 26.52
17 68.0862 (d3)
18 0.0000 1.00 1.5168 64.10
19 0.0000 1.50
20 0.0000 1.87 1.5168 64.10
21 0.0000 0.40
22 0.0000 0.70 1.5168 64.10
23 0.0000 0.50
In the 4th embodiment, the axle that the axle of front side negative lens composition G4 and rear side negative lens composition G5 is gone up airspace d1, the 7th lens composition G7 and the 8th lens G8 is gone up the axle of airspace d2 and the 9th lens composition G9 and filter set FL and is gone up airspace d3, changes when focusing.Infinity has been shown in the following table 11, has reached the variable interval under the photography multiplying power 1/13.6.
(table 11)
The photography multiplying power
Infinity 1/13.6
d1 4.43 5.21
d2 0.10 2.31
d3 8.47 9.95
Following table 12 illustrates each the conditional respective value among the 4th embodiment.
(table 12)
(1)(n1+n2)/2＝1.5920
(2)(ν1+ν2)/2＝68.36
(3)n8＝1.8830
n9＝1.7618
(4)ν8＝40.76
ν9＝26.52
(5)r8/f＝0.43
(6)f89/f＝1.87
Fig. 8 shows each aberration diagram of the 4th embodiment.Fig. 8 A is each aberration diagram under the infinity focusing state, and Fig. 8 B is each aberration diagram under the limited distance focusing state.Like this, can know that in the 4th embodiment, each aberration obtains good rectification under each focusing state, has good imaging performance by each aberration diagram.
Below, with reference to accompanying drawing the 5th of second embodiment of the invention～the 8th embodiment is described.Figure 11, Figure 13, Figure 15 and Figure 17 illustrate separately photographic lens SL of each embodiment (formation of SL1～SL4) and refractive power distributes and the cut-open view of the mode that moves from infinity focusing state each lens combination to closely the focusing state of focusing state changes.As shown in these figures, any of the photographic lens SL1～SL4 of present embodiment all as mentioned above, comprise front side lens combination GF with positive refractive power (first～the 7th lens composition G1～G7) and have the rear side lens group GR (compound lens G89) of positive refractive power successively along optical axis from object side, specifically, comprise successively from object side: the first lens composition G1 with positive refractive power; The second lens composition G2 with positive refractive power; Convex surface is towards the 3rd lens composition G3 of the crescent-shaped of object side; The 4th lens composition (front side negative lens composition) G4 with negative refractive power; Aperture diaphragm S; To have the 5th lens composition (the rear side negative lens composition) G5 of negative refractive power and have the compound lens G56 that the 6th lens composition (the rear side positive lens composition) G6 of positive refractive power fits and to form; The 7th lens composition G7 with positive refractive power; The compound lens G89 that positive lens G8 and negative lens G9 are fitted and form; With filter set FL.At this, filter set FL is made of low-pass filter, infrared cutoff filter etc.Change to the focusing state of focusing state closely (i.e. focusing) from the infinity focusing state, front side lens combination GF and rear side lens group GR move with respect to image planes, the interval variation between front side lens combination GF and the rear side lens group GR.Image planes I goes up imaging at imaging apparatus C (film, CCD, CMOS etc.) as shown in figure 19.
(the 5th embodiment)
Figure 11 is the figure of formation that the photographic lens SL1 of fifth embodiment of the invention is shown.The 5th embodiment is the embodiment of second embodiment.In the photographic lens SL1 of this Figure 11, the first lens composition G1 is made of the positive concave-convex lens L1 of convex surface towards object side, the second lens composition G2 is made of the positive concave-convex lens L2 of convex surface towards object side, the 3rd lens composition G3 is made of the positive concave-convex lens L3 of convex surface towards object side, the 4th lens composition (front side negative lens composition) G4 is made of the negative meniscus lens L4 of convex surface towards object side, compound lens G56 fits by the 5th lens composition (rear side negative lens composition) G5 that will be made of biconcave lens L5 and the 6th lens composition (the rear side positive lens composition) G6 that is made of biconvex lens L6 and constitutes, the 7th lens composition G7 is made of biconvex positive lens L7, and compound lens G89 fits by the 8th lens G8 that will be made of biconvex lens L8 with by the 9th lens G9 that biconcave lens L9 constitutes and constitutes.Being formed among the later embodiment of above photographic lens SL1 is also identical.
In addition, by being moved to object side respectively, front side lens combination GF and rear side lens group GR undertaken to the focusing of closer object from infinity.In addition, aperture diaphragm S is configured in (as mentioned above between front side negative lens composition G4 and rear side negative lens composition G5) in the lens combination GF of front side, from infinity when closer object focus and front side lens combination GF mobile integratedly.Also identical among these embodiment afterwards.
Following table 13 illustrates the value of each parameter of the 5th embodiment.In this table 13, f is that focal length, FNO are that F number, 2 ω are the visual angle, and Bf is a back focal length.And then the face sequence number is the sequence number of the lens face that begins along the direct of travel of light, from object side, the interval till face is spaced apart from each optical surface to next optical surface on optical axis, and refractive index and Abbe number are respectively with respect to the d line (value of λ=587.6nm).In addition, the lens total length represents that infinity when focusing begins the distance on optical axis till the image planes from first of lens face.Wherein, below the focal length, radius-of-curvature, face put down in writing in all each parameter value at interval and the unit of other length generally adopt " mm ", yet also can access equal optical property owing to amplify pro rata or dwindle optical system pro rata, so unit is not limited thereto.In addition, radius-of-curvature 0.0000 expression plane, the refractive index of air is 1.00000 to be omitted.In addition, also be identical among the explanation of the explanation of these symbols and each parameter list embodiment afterwards.
(table 13)
f＝32.00
F.NO＝1.24
2ω＝29.86
Image height=8.50
Total length=56.13
Face sequence number radius-of-curvature face is the refractive index Abbe number at interval
1 35.6570 5.50 1.59319 67.87
2 329.8920 0.30
3 22.5026 4.30 1.59319 67.87
4 63.9805 0.20
5 21.4046 5.10 1.81600 46.63
6 21.5939 1.30
7 57.8235 1.30 1.67270 32.11
8 10.5445 4.90
9 0.0000 4.00 (aperture diaphragm S)
10 -11.2740 1.30 1.69895 30.13
11 56.3778 4.35 1.88300 40.77
12 -19.0149 0.15
13 585.3078 2.85 1.75500 52.29
14 -33.3610(d14)
15 40.4389 4.30 1.88300 40.77
16 -29.4995 1.40 1.76182 26.56
17 880.5274(d17)
18 0.0000 0.50 1.51680 64.12
19 0.0000 4.60
20 0.0000 1.87 1.51680 64.12
21 0.0000 0.30
22 0.0000 0.70 1.51680 64.12
23 0.0000 (Bf)
In the 5th embodiment, upward airspace d17 variation when focusing of axle of going up airspace d14, rear side lens group GR and filter set FL of front side lens combination GF and rear side lens group GR.Infinity focusing state, middle photo distance focusing state are shown following table 14 and closely each group under the focusing state is at interval.In addition, middle photo distance is the photo distance of photography multiplying power-0.01 times, closely is the photo distance of photography multiplying power-0.07 times.Also identical among these values embodiment afterwards.
(table 14)
Infinity Zhong Inter scoops up Ying Ju From Jin Ju From
d14 1.2000 1.4261 3.2405
d17 5.1894 5.4248 6.8031
Bf 0.5160 0.5160 0.5160
Each conditional respective value in the 5th embodiment shown in the following table 15.In addition in this table 15, f represents the focal length of photographic lens SL complete set, fF represents the focal length of front side lens combination GF, fR represents the focal length of rear side lens group GR, and f9 represents the focal length of the negative lens G9 among the rear side lens group GR, and r8 represents the radius-of-curvature of octahedral of the picture side of the 4th lens composition G4, n8 represents the refractive index of positive lens G8 to the d line, the Abbe number of ν 8 this positive lens of expression G8, n9 represents the refractive index of negative lens G9 to the d line, the Abbe number of ν 9 this negative lens of expression G9.Also identical among the explanation of the above symbol embodiment afterwards.
(table 15)
f＝32.0013
fF＝52.0532
fR＝40.1057
f9＝-37.4422
r8＝10.5445
n8＝1.88300
n9＝1.76182
ν8＝40.77
ν9＝26.56
(1)fF/fR＝1.2979
(2)(-f9)/f＝1.1700
(3)r8/f＝0.3295
(4)n8>n9：1.88300>1.76182
(5)ν8>ν9：40.77>26.56
(6)fR/f＝1.2533
Each conditional respective value in the 5th embodiment shown in the following table 16.In addition in this table 16, the Abbe number of the ν 1 expression first lens composition G1, the Abbe number of the ν 2 expressions second lens composition G2, γ F1 represents from the amount of movement of the infinity focusing front side lens combination GF during for photography multiplying power-0.01 times, γ R1 represents from the amount of movement of the infinity focusing rear side lens group GR during for photography multiplying power-0.01 times, n1 represents the refractive index of the first lens composition G1 to the d line, n2 represents the refractive index of the second lens composition G2 to the d line, γ F2 represents from the amount of movement of the infinity focusing front side lens combination GF during for photography multiplying power-0.07 times, γ R2 represents from the amount of movement of the infinity focusing rear side lens group GR during for photography multiplying power-0.07 times, n8 represents the refractive index of positive lens G8 to the d line, n9 represents the refractive index of negative lens G9 to the d line, the Abbe number of ν 8 this positive lens of expression G8, the Abbe number of ν 9 this negative lens of expression G9, r8 represents the radius-of-curvature of face (octahedral) of the picture side of front side negative lens composition G4, f represents the focal length of photographic lens SL complete set, and fR represents the focal length of rear side lens group GR.Also identical among the explanation of the above symbol embodiment afterwards.
(table 16)
ν1＝67.87
ν2＝67.87
γF1＝-0.4614
γR1＝-0.2354
n1＝1.59319
n2＝1.59319
γF2＝-3.6542
γR2＝-1.6137
n8＝1.88300
n9＝1.76182
ν8＝40.77
ν9＝26.56
r8＝10.5445
f＝32.0013
fR＝40.1057
(1)(ν1+ν2)/2＝67.87
(2)γR1/γF1＝0.5102
(3)(n1+n2)/2＝1.59319
(4)γR2/γF2＝0.4416
(5)n8>n9：1.88300>1.76182
(6)ν8>ν9：40.77>26.56
(7)r8/f＝0.3295
(8)fR/f＝1.2533
Figure 12 illustrates each aberration diagram of the 5th embodiment.Figure 12 A is each aberration diagram under the infinity focusing state, and Figure 12 B is each aberration diagram under middle the photo distance focusing state of focusing during for photography multiplying power-0.01 times, each aberration diagram under the closely focusing state that Figure 12 C is focusing when photographing multiplying power-0.07 times.In each aberration diagram, FNO represents the F number, and NA represents numerical aperture, and A represents half angle of view, and H0 represents the object height, and d represents that (λ=587.6nm), g represent that (λ=435.6nm), C represent that (λ=656.3nm), F represent F line (λ=486.1nm) to the C line to the g line to the d line.In addition, in the aberration diagram of astigmatism was shown, solid line was represented sagittal image surface, and dotted line is represented meridianal image surface.In addition, also be identical among the explanation of this aberration diagram each embodiment afterwards.Like this, can know that in the 5th embodiment, each aberration obtains good rectification under each focusing state, has good imaging performance by each aberration diagram.
(the 6th embodiment)
Figure 13 is the figure of formation that the photographic lens SL2 of the sixth embodiment of the present invention is shown.The 6th embodiment is the embodiment of second embodiment.The formation of the photographic lens SL2 of this Figure 13 is identical with the formation of the photographic lens SL1 of the 5th embodiment.Following table 17 illustrates the value of each parameter of the 6th embodiment.
(table 17)
f＝32.00
F.NO＝1.23
2ω＝29.87
Image height=8.50
Total length=56.42
Face sequence number radius-of-curvature face is the refractive index Abbe number at interval
1 35.2403 5.50 1.59319 67.87
2 320.9635 0.30
3 23.0116 4.30 1.59319 67.87
4 61.7430 0.10
5 21.5169 5.20 1.81600 46.62
6 22.0129 1.30
7 55.3189 1.30 1.67270 32.10
8 10.6045 4.90
9 0.0000 4.00 (aperture diaphragm S)
10 -11.2748 1.30 1.69895 30.13
11 55.2195 4.50 1.88300 40.76
12 -18.8925 0.10
13 301.4844 2.85 1.75500 52.32
14 -34.5531(d14)
15 41.3343 4.30 1.88300 40.76
16 -31.0688 1.40 1.76182 26.52
17 458.1219(d17)
18 0.0000 1.00 1.51680 64.10
19 0.0000 1.50
20 0.0000 1.87 1.51680 64.10
21 0.0000 0.40
22 0.0000 0.70 1.51680 64.10
23 0.0000 (Bf)
In the 6th embodiment, upward airspace d17 variation when focusing of axle of going up airspace d14, rear side lens group GR and filter set FL of front side lens combination GF and rear side lens group GR.Infinity focusing state, middle photo distance focusing state are shown following table 18 and closely each group under the focusing state is at interval.
(table 18)
Photo distance closely in the middle of the infinity
d14 1.2000 1.4382 3.3177
d17 7.9043 8.1353 9.4426
Bf 0.5000 0.5000 0.5000
Following table 19 illustrates each conditional respective value of the 6th embodiment.
(table 19)
f＝32.0001
fF＝50.5104
fR＝42.5105
f9＝-38.1450
r8＝10.6045
n8＝1.88300
n9＝1.76182
ν8＝40.76
ν9＝26.52
(1)fF/fR＝1.1882
(2)(-f9)/f＝1.1920
(3)r8/f＝0.3314
(4)n8>n9：1.88300>1.76182
(5)ν8>ν9：40.76>26.52
(6)fR/f＝1.3284
Following table 20 illustrates each conditional respective value of the 6th embodiment.
(table 20)
ν1＝67.87
ν2＝67.87
γF1＝-0.4692
γR1＝-0.2310
n1＝1.59319
n2＝1.59319
γF2＝-3.6560
γR2＝-1.5383
n8＝1.88300
n9＝1.76182
ν8＝40.76
ν9＝26.52
r8＝10.6045
f＝32.0001
fR＝42.5105
(1)(ν1+ν2)/2＝67.87
(2)γR1/γF1＝0.4923
(3)(n1+n2)/2＝1.59319
(4)γR2/γF2＝0.4208
(5)n8>n9：1.88300>1.76182
(6)ν8>ν9：40.76>26.52
(7)r8/f＝0.3314
(8)fR/f＝1.3284
Figure 14 illustrates each aberration diagram of the 6th embodiment.Figure 14 A is each aberration diagram under the infinity focusing state, and Figure 14 B is each aberration diagram under middle the photo distance focusing state of focusing during for photography multiplying power-0.01 times, each aberration diagram under the closely focusing state that Figure 14 C is focusing when photographing multiplying power-0.07 times.Like this, can know that in the 6th embodiment, each aberration obtains good rectification under each focusing state, has good imaging performance by each aberration diagram.
(the 7th embodiment)
Figure 15 is the figure of formation that the photographic lens SL3 of the seventh embodiment of the present invention is shown.The 7th embodiment is the embodiment of second embodiment.The formation of the photographic lens SL3 of this Figure 15 is identical with the formation of the photographic lens SL1 of the 5th embodiment.Following table 21 illustrates the value of each parameter of the 7th embodiment.
(table 21)
f＝32.00
F.NO＝1.23
2ω＝29.87
Image height=8.50
Total length=54.44
Face sequence number radius-of-curvature face is the refractive index Abbe number at interval
1 28.9228 4.35 1.59240 68.36
2 268.2548 0.10
3 24.4064 3.53 1.59240 68.36
4 60.0552 0.10
5 19.8422 3.97 1.81600 46.62
6 20.9876 1.77
7 68.6280 1.30 1.67270 32.10
8 10.9636 4.16
9 0.0000 4.76 (aperture diaphragm S)
10 -11.7583 1.30 1.67270 32.10
11 70.5542 4.53 1.88300 40.76
12 -19.8231 0.10
13 861.2368 2.91 1.75500 52.32
14 -33.5214(d14)
15 40.3110 4.53 1.88300 40.76
16 -29.5297 1.67 1.76182 26.52
17 129.4578(d17)
18 0.0000 1.00 1.51680 64.10
19 0.0000 1.50
20 0.0000 1.87 1.51680 64.10
21 0.0000 0.40
22 0.0000 0.70 1.51680 64.10
23 0.0000 (Bf)
In the 7th embodiment, upward airspace d17 variation when focusing of axle of going up airspace d14, rear side lens group GR and filter set FL of front side lens combination GF and rear side lens group GR.Infinity focusing state, middle photo distance focusing state are shown following table 22 and closely each group under the focusing state is at interval.
(table 22)
Photo distance closely in the middle of the infinity
d14 1.2000 1.3739 3.4519
d17 8.1721 8.4228 9.5938
Bf 0.5000 0.5000 0.5000
Following table 23 illustrates each conditional respective value of the 7th embodiment.
(table 23)
f＝32.0003
fF＝48.5085
fR＝49.1132
f9＝-31.4199
r8＝10.9636
n8＝1.88300
n9＝1.76182
ν8＝40.76
ν9＝26.52
(1)fF/fR＝0.9877
(2)(-f9)/f＝0.9819
(3)r8/f＝0.3426
(4)n8>n9：1.88300>1.76182
(5)ν8>ν9：40.76>26.52
(6)fR/f＝1.5348
Following table 24 illustrates each conditional respective value of the 7th embodiment.
(table 24)
ν1＝68.36
ν2＝68.36
γF1＝-0.4247
γR1＝-0.2507
n1＝1.59240
n2＝1.59240
γF2＝-3.6735
γR2＝-1.4217
n8＝1.88300
n9＝1.76182
ν8＝40.76
ν9＝26.52
r8＝10.9636
f＝32.0003
fR＝49.1132
(1)(ν1+ν2)/2＝68.36
(2)γR1/γF1＝0.5903
(3)(n1+n2)/2＝1.59240
(4)γR2/γF2＝0.3870
(5)n8>n9：1.88300>1.76182
(6)ν8>ν9：40.76>26.52
(7)r8/f＝0.3426
(8)fR/f＝1.5348
Figure 16 illustrates each aberration diagram of the 7th embodiment.Figure 16 A is each aberration diagram under the infinity focusing state, and Figure 16 B is each aberration diagram under middle the photo distance focusing state of focusing during for photography multiplying power-0.01 times, each aberration diagram under the closely focusing state that Figure 16 C is focusing when photographing multiplying power-0.07 times.Like this, can know that in the 7th embodiment, each aberration obtains good rectification under each focusing state, has good imaging performance by each aberration diagram.
(the 8th embodiment)
Figure 17 is the figure of formation that the photographic lens SL4 of the eighth embodiment of the present invention is shown.The 8th embodiment is the embodiment of second embodiment.The formation of the photographic lens SL4 of this Figure 17 is identical with the formation of the photographic lens SL1 of the 5th embodiment.Following table 25 illustrates the value of each parameter of the 8th embodiment.
(table 25)
f＝32.00
F.NO＝1.23
2ω＝29.87
Image height=8.50
Total length=56.04
Face sequence number radius-of-curvature face is the refractive index Abbe number at interval
1 28.9228 4.24 1.59319?67.87
2 198.4893 0.10
3 25.2661 3.45 1.59319?67.87
4 61.0768 0.10
5 21.7621 5.60 1.81600?46.62
6 22.6394 1.41
7 59.8650 1.30 1.67270?32.10
8 10.4447 4.02
9 0.0000 5.42 (aperture diaphragm S)
10 -10.7127 1.30 1.67270?32.10
11 100.4090 3.97 1.81600 46.62
12 -19.6771 0.10
13 -237.5005 3.65 1.75500 52.32
14 -23.2086(d14)
15 35.4041 4.81 1.88300 40.76
16 -38.2481 1.50 1.80518 25.42
17 568.3560(d17)
18 0.0000 1.00 1.51680 64.10
19 0.0000 1.50
20 0.0000 1.87 1.51680 64.10
21 0.0000 0.40
22 0.0000 0.70 1.51680 64.10
23 0.0000 (Bf)
In the 8th embodiment, upward airspace d17 variation when focusing of axle of going up airspace d14, rear side lens group GR and filter set FL of front side lens combination GF and rear side lens group GR.Infinity focusing state, middle photo distance focusing state are shown following table 26 and closely each group under the focusing state is at interval.
(table 26)
Photo distance closely in the middle of the infinity
d14 1.2000 1.3283 3.5662
d17 7.9000 8.1808 9.4651
Bf 0.5000 0.5000 0.5000
Following table 27 illustrates each conditional respective value of the 8th embodiment.
(table 27)
f＝32.0001
fF＝54.1696
fR＝39.1379
f9＝-44.4583
r8＝10.4447
n8＝1.88300
n9＝1.80518
ν8＝40.76
ν9＝25.42
(1)fF/fR＝1.3841
(2)(-f9)/f＝1.3893
(3)r8/f＝0.3264
(4)n8>n9：1.88300>1.80518
(5)ν8>ν9：40.76>25.42
(6)fR/f＝1.2231
Following table 28 illustrates each conditional respective value of the 8th embodiment.
(table 28)
ν1＝67.87
ν2＝67.87
γF1＝-0.4091
γR1＝-0.2808
n1＝1.59319
n2＝1.59319
γF2＝-3.9313
γR2＝-1.5651
n8＝1.88300
n9＝1.80518
ν8＝40.76
ν9＝25.42
r8＝10.4447
f＝32.0001
fR＝39.1379
(1)(ν1+ν2)/2＝67.87
(2)γR1/γF1＝0.6864
(3)(n1+n2)/2＝1.59319
(4)γR2/γF2＝0.3981
(5)n8>n9：1.88300>1.80518
(6)ν8>ν9：40.76>25.42
(7)r8/f＝0.3264
(8)fR/f＝1.2231
Figure 18 illustrates each aberration diagram of the 8th embodiment.Figure 18 A is each aberration diagram under the infinity focusing state, and Figure 18 B is each aberration diagram under middle the photo distance focusing state of focusing during for photography multiplying power-0.01 times, each aberration diagram under the closely focusing state that Figure 18 C is focusing when photographing multiplying power-0.07 times.Like this, can know that in the 8th embodiment, each aberration obtains good rectification under each focusing state, has good imaging performance by each aberration diagram.
The invention is not restricted to the foregoing description, can make various changes and modification to its inscape without departing from the scope of the invention.And disclosed inscape can anyly make up among the embodiment, is used for specializing the present invention.For example, some in the inscape can be from omitting in disclosed all inscapes among described embodiment.In addition, can suitably make up inscape among the different embodiment.

Claims (35)

1. a photographic lens is characterized in that,
At the most close object side, comprise first lens composition with positive refractive power and the second lens composition successively from object side with positive refractive power,
In the most close picture side, have the compound lens of successively positive lens and negative lens being fitted and forming from object side,
If the above-mentioned first lens composition is that n1, Abbe number are v1 to the refractive index of d line, establishes the above-mentioned second lens composition refractive index of d line be n2, when Abbe number is v2, satisfy the condition of following formula:
(n1+n2)/2>1.49
(v1+v2)/2>60。
2. photographic lens according to claim 1, wherein, above-mentioned first lens composition and the above-mentioned second lens composition are the crescent-shaped of convex surface towards object side.
3. photographic lens according to claim 1, wherein,
Between above-mentioned second lens composition and above-mentioned compound lens, have successively from object side:
Front side negative lens composition with negative refractive power; Aperture diaphragm; Rear side negative lens composition with negative refractive power; With rear side positive lens composition with positive refractive power.
4. photographic lens according to claim 3 wherein, has the three lens composition of convex surface towards the crescent-shaped of object side between above-mentioned second lens composition and above-mentioned front side negative lens composition.
5. photographic lens according to claim 3, wherein, above-mentioned front side negative lens composition is the four lens composition of convex surface towards the crescent-shaped of object side, above-mentioned rear side negative lens composition is the 5th a lens composition of concave-concave shape.
6. photographic lens according to claim 3 wherein, between the 6th lens composition and above-mentioned compound lens as above-mentioned rear side positive lens composition, possesses the 7th lens composition with positive refractive power.
7. photographic lens according to claim 3, wherein, above-mentioned rear side negative lens composition and above-mentioned rear side positive lens composition are fitted and are formed compound lens.
8. photographic lens according to claim 1, wherein,
If the above-mentioned positive lens of the most close above-mentioned compound lens as side configuration is that n8, Abbe number are v8 to the refractive index of d line, the above-mentioned negative lens of the most close above-mentioned compound lens as side configuration is n9, when Abbe number is v9, satisfies the condition of following formula the refractive index of d line:
n8>n9
v8>v9。
9. photographic lens according to claim 3, wherein,
If the radius-of-curvature as the face of side of above-mentioned front side negative lens composition is r8, when the focal length of above-mentioned photographic lens complete set is f, satisfy the condition of following formula:
0.3<r8/f<0.5。
10. photographic lens according to claim 1, wherein, the above-mentioned compound lens and the other lenses of the most close picture side configuration move along optical axis with different speed when focusing.
11. photographic lens according to claim 1, wherein,
If the focal length of the most close above-mentioned compound lens as side configuration is the focal length of f89, above-mentioned photographic lens complete set when being f, satisfy the condition of following formula:
1<f89/f<2。
12. photographic lens according to claim 1, wherein,
The above-mentioned positive lens composition of the most close above-mentioned compound lens as side configuration is the biconvex shape.
13. an optical device has the described photographic lens of claim 1.
14. a photographic lens is characterized in that,
Comprise front side lens combination with positive refractive power and rear side lens group successively from object side with positive refractive power,
Above-mentioned front side lens combination comprises successively from object side: the first lens composition with positive refractive power; The second lens composition with positive refractive power; The 3rd lens composition with positive refractive power; The 4th lens composition with negative refractive power; Aperture diaphragm; The 5th lens composition with negative refractive power; The 6th lens composition with positive refractive power; With the 7th lens composition with positive refractive power,
Above-mentioned rear side lens group comprises the compound lens of successively positive lens and negative lens being fitted and forming from object side,
When closer object was focused, above-mentioned front side lens combination and above-mentioned rear side lens group moved along the optical axis direction object side with different amount of movements from infinity, so that the increase of the interval between above-mentioned front side lens combination and the above-mentioned rear side lens group,
If the focal length of above-mentioned front side lens combination is the focal length of fF, above-mentioned rear side lens group when being fR, satisfy the condition of following formula:
0.79<fF/fR<1.58。
15. photographic lens according to claim 14, wherein, above-mentioned front side lens combination and above-mentioned rear side lens group, from middle photo distance when closer object is focused, with different amount of movements than moving along optical axis.
16. photographic lens according to claim 14, wherein,
If the focal length of the above-mentioned negative lens in the above-mentioned rear side lens group is the focal length of f9, above-mentioned photographic lens complete set when being f, satisfy the condition of following formula:
0.78<(-f9)/f<1.59。
17. photographic lens according to claim 14, wherein,
Above-mentioned the 5th lens composition is the concave-concave shape,
Above-mentioned the 6th lens composition is the biconvex shape.
18. photographic lens according to claim 14, wherein, above-mentioned the 7th lens composition is the positive lens of biconvex shape.
19. photographic lens according to claim 14, wherein, above-mentioned the 7th lens composition is the positive concave-convex lens of convex surface towards the picture side.
20. a photographic lens is characterized in that,
Comprise front side lens combination with positive refractive power and rear side lens group successively from object side with positive refractive power,
Above-mentioned front side lens combination comprises first lens composition with positive refractive power and the second lens composition with positive refractive power successively from the most close object side,
Above-mentioned rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side,
If the above-mentioned first lens composition is v1 to the Abbe number of d line, the above-mentioned second lens composition is v2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(v1+v2)/2>60
0.35<γR1/γF1<0.80。
21. photographic lens according to claim 20, wherein, above-mentioned front side lens combination and above-mentioned rear side lens group, from middle photo distance when closer object is focused, with different amount of movements than moving along optical axis.
22. photographic lens according to claim 20, wherein,
During for photography multiplying power-0.07 times, the amount of movement of establishing above-mentioned front side lens combination is γ F2, when the amount of movement of above-mentioned rear side lens group is γ R2, satisfies the condition of following formula from infinity focusing:
0.35<γR2/γF2<0.50。
23. a photographic lens is characterized in that,
Comprise front side lens combination with positive refractive power and rear side lens group successively from object side with positive refractive power,
Above-mentioned front side lens combination comprises first lens composition with positive refractive power and the second lens composition with positive refractive power from aperture diaphragm to object side,
Above-mentioned rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side,
If the above-mentioned first lens composition is v1 to the Abbe number of d line, the above-mentioned second lens composition is v2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(v1+v2)/2>60
0.35<γR1/γF1<0.80。
24. photographic lens according to claim 23, wherein, above-mentioned front side lens combination and above-mentioned rear side lens group, from middle photo distance when closer object is focused, with different amount of movements than moving along optical axis.
25. photographic lens according to claim 23, wherein,
During for photography multiplying power-0.07 times, the amount of movement of establishing above-mentioned front side lens combination is γ F2, when the amount of movement of above-mentioned rear side lens group is γ R2, satisfies the condition of following formula from infinity focusing:
0.35<γR2/γF2<0.50。
26. the manufacture method of a photographic lens is characterized in that,
May further comprise the steps: dispose front side lens combination with positive refractive power and rear side lens group successively with positive refractive power from object side, this front side lens combination comprises first lens composition with positive refractive power and the second lens composition with positive refractive power, and this rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side; With
Move above-mentioned front side lens combination so that be photography multiplying power-0.01 times from the infinity focusing,
If the above-mentioned first lens composition is v1 to the Abbe number of d line, the above-mentioned second lens composition is v2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(v1+v2)/2>60
0.35<γR1/γF1<0.80。
27. the manufacture method of photographic lens according to claim 26, wherein,
Between above-mentioned second lens composition and above-mentioned compound lens, comprise successively: front side negative lens composition with negative refractive power from object side; Aperture diaphragm; Rear side negative lens composition with negative refractive power; With rear side positive lens composition with positive refractive power.
28. the manufacture method of photographic lens according to claim 26, wherein, the above-mentioned compound lens and the other lenses of the most close picture side configuration move along optical axis with different speed when focusing.
29. the manufacture method of a photographic lens is characterized in that,
May further comprise the steps: dispose front side lens combination with positive refractive power and rear side lens group successively with positive refractive power from object side; With
So that the mode that the interval between above-mentioned front side lens combination and the above-mentioned rear side lens group increases makes above-mentioned front side lens combination and above-mentioned rear side lens group move along the optical axis direction object side with different amount of movements, thus from infinity when closer object is focused,
Above-mentioned front side lens combination comprises successively from object side: the first lens composition with positive refractive power; The second lens composition with positive refractive power; The 3rd lens composition with positive refractive power; The 4th lens composition with negative refractive power; Aperture diaphragm; The 5th lens composition with negative refractive power; The 6th lens composition with positive refractive power; With the 7th lens composition with positive refractive power,
Above-mentioned rear side lens group comprises the compound lens of successively positive lens and negative lens being fitted and forming from object side,
If the focal length of above-mentioned front side lens combination is the focal length of fF, above-mentioned rear side lens group when being fR, satisfy the condition of following formula:
0.79<fF/fR<1.58。
30. the manufacture method of photographic lens according to claim 29, wherein, above-mentioned front side lens combination and above-mentioned rear side lens group, from middle photo distance when closer object is focused, with different amount of movements than moving along optical axis.
31. the manufacture method of photographic lens according to claim 29, wherein,
If the focal length of the above-mentioned negative lens in the above-mentioned rear side lens group is the focal length of f9, above-mentioned photographic lens complete set when being f, satisfy the condition of following formula:
0.78<(-f9)/f<1.59。
32. the manufacture method of a photographic lens is characterized in that,
May further comprise the steps: configuration has the front side lens combination of positive refractive power and has the rear side lens group of positive refractive power, this front side lens combination comprises first lens composition with positive refractive power and the second lens composition with positive refractive power successively from object side, and this rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side; With
Move above-mentioned front side lens combination so that be photography multiplying power-0.01 times from the infinity focusing,
If the above-mentioned first lens composition is v1 to the Abbe number of d line, the above-mentioned second lens composition is v2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(v1+v2)/2>60
0.35<γR1/γF1<0.80。
33. the manufacture method of a photographic lens is characterized in that,
May further comprise the steps: configuration has the front side lens combination of positive refractive power and has the rear side lens group of positive refractive power, this front side lens combination comprises first lens composition with positive refractive power and the second lens composition with positive refractive power from aperture diaphragm to object side, and this rear side lens group has the compound lens of successively positive lens and negative lens being fitted and forming from object side; With
Move above-mentioned front side lens combination so that be photography multiplying power-0.01 times from the infinity focusing,
If the above-mentioned first lens composition is v1 to the Abbe number of d line, the above-mentioned second lens composition is v2 to the Abbe number of d line, from the amount of movement of the infinity focusing above-mentioned front side lens combination during for photography multiplying power-0.01 times is γ F1, when the amount of movement of the infinity focusing above-mentioned rear side lens group during for photography multiplying power-0.01 times is γ R1, satisfy the condition of following formula:
(v1+v2)/2>60
0.35<γR1/γF1<0.80。
34. the manufacture method of photographic lens according to claim 32, wherein,
During for photography multiplying power-0.07 times, the amount of movement of establishing above-mentioned front side lens combination is γ F2, when the amount of movement of above-mentioned rear side lens group is γ R2, satisfies the condition of following formula from infinity focusing:
0.35<γR2/γF2<0.50。
35. the manufacture method of photographic lens according to claim 33, wherein,
During for photography multiplying power-0.07 times, the amount of movement of establishing above-mentioned front side lens combination is γ F2, when the amount of movement of above-mentioned rear side lens group is γ R2, satisfies the condition of following formula from infinity focusing:
0.35<γR2/γF2<0.50。
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