JP2000206397A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive camera of simple constitution capable of downsizing an outside dimension compared with a conventional one, while at least one portion of various kind of flapping effects is executed. SOLUTION: This camera of the present invention has a converter lens 28 provided to be movable between an insertion position inserted inside a master lens optical system 10 and a refuge position to take refuge outside the master lens optical system 10, and is provided with a photographing optical system capable of changing a focal distance by the insertion and the refuge of the converter lens 28. Displacement is allowed between a first photographing condition for making an optical axis 28a of the converter lens 28 coincident with an optical axis 10a of the master lens optical system 10 and a second photographing condition for not making the optical axis 28a of the converter lens 28 coincident with the optical axis 10a of the master lens optical system 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly, to a camera movably provided between an insertion position inserted into a master lens optical system and a retracted position retracted outside the master lens optical system. The present invention relates to a camera having a converter lens having a shooting optical system whose focal length is changed by inserting and retracting the converter lens.

[0002]

2. Description of the Related Art It has been widely known that if the tilting effect can be used in photographing, the photographic expression can be enlarged and convenient.

[0003] Japanese Patent Application Laid-Open No. 5-53166 discloses a camera having a built-in tilt mechanism, which is a camera whose lens cannot be exchanged. In this camera with a built-in tilt mechanism, the angle at which the optical axis of the entire master lens optical system intersects the film surface of the camera body can be inclined (that is, tilted) within a predetermined range from a right angle.

In the field of the conventional interchangeable lens single-lens reflex camera, there is an interchangeable lens capable of obtaining a shift effect and a tilt effect.

[0005]

Problems to be Solved by the Invention
The camera disclosed in Japanese Patent Application Laid-Open Publication No. H10-209400 is configured such that the entire master lens optical system is inclined with respect to the film surface of the camera body. As a result, in this conventional camera, the overall outer dimensions of the lens barrel containing the master lens optical system are large.

[0006] Interchangeable lenses capable of obtaining a shift effect and a tilt effect in the field of an interchangeable lens single-lens reflex camera are very expensive.

SUMMARY OF THE INVENTION The present invention has been made under the above circumstances, and an object of the present invention is to realize at least a part of various tilting effects, to have a simple and inexpensive structure, and to reduce the external dimensions compared to the conventional one. To provide a camera.

[0008]

In order to achieve the above-mentioned object of the present invention, a camera according to the present invention comprises: an insertion position inserted into a master lens optical system; In a camera having a converter lens provided movably between the position and a photographing optical system whose focal length is changed by insertion and retraction of the converter lens, at the insertion position,
Between a first photographing state in which the optical axis of the converter lens coincides with the optical axis of the master lens optical system, and a second photographing state in which the optical axis of the converter lens does not coincide with the optical axis of the master lens optical system Can be displaced by
It is characterized by:

[0009]

In the camera according to the present invention, which is constructed as described above, while the converter lens is arranged at the insertion position for photographing, the converter lens is moved relative to the optical axis of the master lens optical system. The displacement can be made between a first photographing state in which the optical axes of the lenses are aligned and a second photographing state in which the optical axis of the converter lens is not aligned with the optical axis of the master lens optical system. Therefore, a tilt effect or a shift effect, which is a part of various tilt effects, can be obtained in the second shooting state.

In the camera according to the present invention having the above-described configuration, if the optical axis of the converter lens is inclined with respect to the optical axis of the master lens optical system in the second photographing state, the tilt can be increased. It is possible to shoot with an effect.

In the camera according to the present invention having the above-described structure, the optical axis of the converter lens is moved in parallel with the optical axis of the master lens optical system in the second photographing state. Thus, shooting with a shift effect can be performed.

Hereinafter, cameras according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] First, a configuration of a camera according to a first embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a schematic longitudinal sectional view of a camera according to the first embodiment of the present invention.

The camera shown in FIG. 1 is a single-lens reflex camera provided with a lens barrel 10 including a master lens optical system and a camera body 12. The lens barrel 10 of this camera
Is integrated with the camera body 12 and cannot be replaced. The lens barrel 10 is housed in an exterior housing 12a of the camera body 12.

In the exterior housing 12a, a quick return mirror 14 and a shutter 16 are arranged behind the lens barrel 10 along the photographing optical axis 10a. A film 18 is disposed behind the shutter 16 in the exterior housing 12a. The reticle 20 and the pentaprism 22 are disposed above the quick return mirror 14 in the exterior housing 12a extending between a pair of film reels (not shown) disposed at the left and right ends of the exterior housing 12a. ing. Pentaprism 2
A finder optical system 24 is arranged behind the camera 2.
The focusing plate 20, the pentaprism 22, and the finder optical system 24 are arranged along the finder optical axis 10b branched from the photographing optical axis 10a of the lens barrel 10 in the quick return mirror 14 at the lowered position.

On the upper surface of the exterior housing 12a, a strobe light emitter 26 is disposed so as to be selectively rotatable vertically. The camera according to this embodiment further includes a converter lens 28 that can be inserted into and retracted from the gap between the lens barrel 10 and the quick return mirror 14.

The insertion position of the converter lens 28 is shown by a two-dot chain line in FIG. 1, and the retracted position is shown by a solid line in FIG. The converter lens 28 at the insertion position is inserted into the master lens optical system, and the converter lens 28 at the retracted position is completely retracted outside the master lens optical system.

The converter lens 28, together with the master lens optical system in the lens barrel 10, constitutes a photographing optical system in this camera. In this photographing optical system, the focal length with respect to the film 18 is changed by moving the converter lens 28 between the insertion position and the retracted position.

The converter lens 28 is supported by a converter lens support frame 30. On each of the left and right sides of the lens barrel 10, 1 extends parallel to the photographing optical axis 10a.
A pair of converter lens rotation support arms 32 are arranged.

A converter lens support frame 30 is fixed to the rear end (one end) of the pair of converter lens rotation support arms 32. The front end (the other end) of the converter lens rotation support arm 32 is rotatably supported on both left and right sides of the lens barrel 10. The front end is rotatable within a predetermined range.

The converter lens rotation support arm 32 is connected to a converter lens insertion / retreat / drive unit 34. The converter lens insertion / retreat / drive unit 34 drives the movement of the converter lens 28 between the insertion position and the retreat position.

Converter lens inserting / retracting / driving means 3
Reference numeral 4 denotes an input gear 34a at the front end of one of the converter lens rotation support arms 32. The input gear 34a is coaxial with the center of rotation of the front end. A rotation angle control gear 34c meshes with the input gear 34a, and the rotation angle control gear 34c transmits the rotation force of which the rotation angle is controlled from the rotation angle control drive unit 34b to the input gear 34a.

Next, the operation of the camera according to the first embodiment of the present invention, which is configured as described above, will be further described with reference to FIGS. I will explain it.

FIG. 2A is a schematic side view of a main part of the camera according to the first embodiment of the present invention in a first photographing state; FIG. FIG. 2C is a schematic rear view of a main part of the camera according to the first embodiment in the first shooting state; FIG. 2C shows a first example of the second shooting state; FIG. 3D is a schematic side view of a main part of the camera according to the first embodiment; and FIG. 2D is the first embodiment in the second example of the second shooting state. It is a schematic side view of the principal part of the camera according to the form of FIG.

In this camera, the rotation angle of the front end (the other end) of one of the converter lens rotation support arms 32 at the above-described insertion position is controlled by rotation angle control driving means 34b.
Can be controlled by As a result, the converter lens 28 at the insertion position is moved to the position shown in FIGS.
Can be displaced between two examples (first and second examples) of a first imaging state shown in FIG. 2 and a second imaging state shown in FIGS. 2C and 2D.

In the first photographing state, the optical axis 28a of the converter lens 28 coincides with the optical axis 10a of the lens barrel 10 (that is, the master lens optical system). In the two examples of the second shooting state, the optical axis 28a of the converter lens 28 does not match the optical axis 10a of the lens barrel 10.

FIG. 2C shows that the input gear 34a at the front end of one of the converter lens rotation support arms 32 is turned upward by + α ° by the converter lens insertion / retreat / drive means 34 from the first photographing state. The first of the moved second photographing states
An example is shown. As a result, the converter lens 28
Is inclined upward by + α ° with respect to the optical axis 10a of the lens barrel 10.

FIG. 2D shows that the input gear 34a at the front end of one of the converter lens rotation support arms 32 is lowered by -α ° by the converter lens inserting / retracting / driving means 34 from the first photographing state. The rotated second insertion state of the second insertion state
An example is shown. As a result, the converter lens 28
The optical axis 28a is inclined downward by -α ° with respect to the optical axis 10a of the lens barrel 10.

Here, the second photographing state of the second photographing state displaced up and down with respect to the first photographing state at the insertion position described above.
The displacement range between the two examples is a photographable range in which all light beams coming from the lens barrel 10 toward the converter lens 28 can pass through the converter lens 28.

It can be said that the converter lens 28 is inserted into the master lens optical system of the lens barrel 10 within this photographable range. Then, within the photographable range, a tilt effect, which is a kind of tilting effect, can be exerted on the image of the subject passing through the master lens optical system in the vertical direction.

The vertical direction is the direction in which the converter lens 28 moves between the retracted position and the inserted position.

As is apparent from the above detailed description, the converter lens inserting / retracting / driving means 34 is shown in the retracted position shown by a solid line in FIG. 1 and in FIGS. 2A and 2B. The movement of the converter lens 28 between the first shooting state and the two examples of the second shooting state shown in FIGS. 2C and 2D can be selectively driven.

Converter lens inserting / evacuating / driving means 3
4 can adjust the optical axis 28a of the converter lens 28 to an arbitrary angle in both up and down directions with respect to the optical axis 10a of the lens barrel 10 (master lens optical system) within the above range.

[Second Embodiment] Next, FIG.
The configuration of the camera according to the second embodiment of the present invention will be described with reference to FIGS.

FIG. 3A is a schematic side view showing a main part of a camera according to a second embodiment of the present invention in a first photographing state; and FIG. FIG. 4B is a schematic rear view of a main part of the camera shown in FIG.

A part of the configuration of the camera according to the second embodiment is the same as that of the camera according to the first embodiment described above with reference to FIGS. 1 and 2A to 2D. It is the same as part of the configuration. Therefore, in the camera according to the second embodiment, the same components as those in the camera according to the first embodiment are denoted by the same reference numerals as those used in the camera according to the first embodiment. Detailed description is omitted.

The difference between the second embodiment and the first embodiment is that, as shown in FIGS. 3A and 3B,
The converter lens support frame 30 is supported by a rear end (one end) of a pair of converter lens rotation support arms 32 via a horizontal rotation center shaft 40.

Furthermore, a converter lens optical axis angle adjusting means 42 is interposed between the pair of converter lens rotation support arms 32 and the converter lens support frame 30.
The converter lens optical axis angle adjusting means 42 adjusts the rotation angle of the converter lens support frame 30 around the rotation center axis 40. As a result, the inclination angle of the optical axis 28a of the converter lens 28 with respect to the optical axis 10a of the lens barrel 10 (that is, the master lens optical system) is adjusted.

Converter lens optical axis angle adjusting means 42
Is provided with an input gear 42a concentrically fixed to one converter lens rotation support arm 32 on the rotation center axis 40. The input gear 42 a has a rotation angle control driving unit 4 supported by one of the converter lens rotation support arms 32.
The rotation angle control gear 42c of 2b is meshed.
In this embodiment, the rotation angle control driving means 42b
Is composed of, for example, a pulse motor.

Next, the operation of the camera according to the second embodiment of the present invention, which is configured as described above, will be further described with reference to FIGS. 3C and 3D and FIG. (A) and (B).

FIG. 3C is a schematic side view of a main part of the camera according to the second embodiment in the first example of the second photographing state; FIG. 4D is a schematic side view of the main part of the camera according to the second embodiment in a second example of the second shooting state; FIG.
FIG. 4B is a schematic side view of a main part of the camera according to the second embodiment in a third example of the shooting state; and FIG. 4B is a fourth example of the second shooting state. FIG. 9 is a schematic side view of a main part of a camera according to a second embodiment of the present invention.

In this camera, the converter lens inserting / retracting / driving means 34 also includes a converter lens supporting frame 30 with a converter lens 28 as indicated by a solid line in FIG. It can be selectively moved between the retracted position shown and the inserted state shown by the two-dot chain line in FIG.

Converter lens insertion / retraction / driving means 3
4 further shows the insertion position, (A) and (B) of FIG.
The first photographing state as shown in FIG.
2 shows two examples of the second shooting state (first example and second example).
), The converter lens support frame 30 can be displaced.

In the first photographing state, the optical axis 28a of the converter lens 28 coincides with the optical axis 10a of the lens barrel 10 (that is, the master lens optical system). Also, the second
In the two examples of the photographing state of FIG.
The optical axis 28a of the converter lens 28 does not coincide with a.

More specifically, in the first example of the second photographing state shown in FIG. 3C, the first photographing state shown in FIG. 3A and FIG. With the converter lens optical axis angle adjusting means 42 fixed from the state, the input gear 34a at the front end (the other end) of one of the converter lens rotation support arms 32 is used to insert / retract the converter lens.
It is rotated upward by + α ° by the driving means 34.

As a result, the optical axis 28a of the converter lens 28 is tilted upward by + α ° with respect to the optical axis 10a of the lens barrel 10 (that is, the master lens optical system), so that the optical axis 28a coincides with the optical axis 10a of the lens barrel 10. I haven't.

Further, in the second example of the second photographing state shown in FIG. 3D, one of the first and second insertion states is maintained while the converter lens optical axis angle adjusting means 42 is fixed. The input gear 34a at the front end of the converter lens rotation support arm 32 is rotated downward by -α ° by the converter lens insertion / retreat / drive means 34.

As a result, the optical axis 28a of the converter lens 28 is inclined downward by -α ° with respect to the optical axis 10a of the lens barrel 10 (that is, the master lens optical system). Do not match.

Here, the displacement range between the two examples of the second photographing state vertically displaced from the first photographing state at the above-described insertion position is from the master lens optical system of the lens barrel 10 to the converter lens 28. All of the incoming luminous flux is in a photographable range in which the luminous flux can pass through the converter lens 28.

It can be said that the converter lens 28 is inserted into the master lens optical system of the lens barrel 10 within this photographable range. Then, a tilt effect, which is a kind of tilting effect, can be exerted on the image of the subject passing through the master lens optical system in the vertical direction. The vertical direction is a moving direction between the insertion position and the retracted position of the converter lens 28.

As is clear from the above description, the converter lens inserting / retracting / driving means 34 is shown in the retracted position shown by a solid line in FIG. 1 and in FIGS. 3 (A) and 3 (B). The movement of the converter lens 28 between the first shooting state and the two examples of the second shooting state shown in FIGS. 3C and 3D can be selectively driven.

In addition, if within the photographable range, the light of the converter lens 28 is moved from the first photographing state to the optical axis 10a of the lens barrel 10 while the converter lens optical axis angle adjusting means 42 is fixed. The shaft 28a can be adjusted to any angle in both the up and down directions.

Further, in this embodiment, FIG.
And a converter lens optical axis angle adjusting means between the first photographing state shown in FIG. 3B and the two examples of the second photographing state shown in FIGS. 3C and 3D. 42 can be used. As a result, the optical axis 10a of the lens barrel 10 (that is, the master lens optical system)
The angle at which the optical axis 28a of the converter lens 28 held by the converter lens holding frame 30 is inclined can be adjusted.

For example, in FIG. 4A, from the first photographing state shown in FIGS. 3A and 3B, the input gear 34a at the front end of one of the converter lens rotation support arms 32 is connected to the converter. + Α ° by lens insertion / retraction / driving means 34
During the first example of the second imaging state until the second imaging state is rotated only upward, the fourth example of the second imaging state in which the converter lens optical axis angle adjusting means 42 is rotated backward by + α °. It is shown.

As a result, the optical axis 28a of the converter lens 28 translates upward by a distance of + y from the optical axis 10a while maintaining a state parallel to the optical axis 10a of the lens barrel 10.

FIG. 4B shows an input gear 34a at the front end of one of the converter lens rotation support arms 32 from the first photographing state.
4, during the second example of the second shooting state until the converter lens is turned downward by -α °, the second shooting in which the converter lens optical axis angle adjusting means 42 is turned forward by -α °. A fifth example of the state is shown.

As a result, the optical axis 28a of the converter lens 28 translates downward from the optical axis 10a by a distance of -y while maintaining a state parallel to the optical axis 10a of the lens barrel 10.

Here, the displacement range between the two examples (fourth and fifth examples) of the above-described second imaging state displaced vertically in parallel from the above-described first imaging state is the lens barrel 10. From the master lens optical system to the converter lens 28
Becomes a photographable range in which all the luminous fluxes traveling toward can pass through the converter lens 28.

It can be said that the converter lens 28 is inserted into the master lens optical system of the lens barrel 10 within this photographable range. Then, a shift effect, which is a kind of tilting effect, can be exerted on the image of the subject passing through the master lens optical system in the vertical direction.

[Third Embodiment] Next, the configuration of a camera according to a third embodiment of the present invention will be described in detail with reference to FIG.

Here, FIG. 5 is a schematic perspective view of a main part of a camera according to a third embodiment of the present invention.

A part of the configuration of the camera according to the third embodiment is a configuration of the camera according to the first embodiment described above with reference to FIGS. 1 and 2A to 2D. Is the same as part of Therefore, in the camera according to the third embodiment, the same components as those in the camera according to the first embodiment are denoted by the same reference numerals as those in the camera according to the first embodiment. Detailed description is omitted.

In the third embodiment, as shown in FIG. 5, two horizontal movement guide members 50 extend between the rear ends (one ends) of a pair of converter lens rotation support arms 32. ing. Both ends of the horizontal movement guide member 50 are fixed to the rear ends (one ends) of the pair of converter lens rotation support arms 32.

The horizontal moving guide member 50 includes a horizontal moving frame 5.
2 are supported. The horizontal movement frame 52 is movable along the horizontal movement guide member 50 between the rear ends of the pair of converter lens rotation support arms 32 as indicated by an arrow X.

In the frame of the horizontal moving frame 52, a horizontal rotating frame 56 is arranged. A horizontal rotation center shaft 54 extends vertically from the horizontal rotation frame 56, and upper and lower ends of the horizontal rotation center shaft 54 are rotatably supported by the horizontal movement frame 52.

The converter lens support frame 30 is disposed within the horizontal rotation frame 56. A vertical rotation center shaft 57 extends horizontally from the converter lens support frame 30 in the horizontal direction, and the left and right extending ends of the vertical rotation center shaft 57 are rotatably supported by the horizontal rotation frame 56. Have been. The converter lens support frame 30 constitutes a vertical rotation frame.

A horizontal movement control drive means 58 is provided between the pair of converter lens rotation support arms 32 and the horizontal movement frame 52.
Is interposed. The horizontal movement control driving means 58 is configured to move the horizontal movement frame 52 along the horizontal movement guide member 50 within an arbitrary distance within a predetermined range.

The horizontal movement control driving means 58 includes a rack 58a fixed to the horizontal movement frame 52 and extending horizontally in the left-right direction.
Contains. An output gear 58b of a rotation angle control drive source 58c supported by one converter lens rotation support arm 32 meshes with the rack 58a. In this embodiment, the rotation angle control drive source 58c is constituted by a pulse motor.

Between the horizontal movement frame 52 and the horizontal rotation frame 56, a horizontal rotation angle control driving means 60 is interposed. The horizontal rotation angle control driving means 60 is configured to rotate the horizontal rotation frame 56 to an arbitrary angle within a predetermined range in the left and right direction around the horizontal rotation center axis 54.

The horizontal rotation angle control driving means 60 includes an input gear 60a concentrically fixed to the horizontal rotation center shaft 54. The output gear 60b of the rotation angle control drive source 60c fixed to the horizontal moving frame 52 meshes with the input gear 60a. In this embodiment, the rotation angle control drive source 60c is constituted by a pulse motor.

Between the horizontal rotation frame 56 and the converter lens support frame 30, a vertical rotation angle control driving means 6 is provided.
2 is interposed. Vertical rotation angle control driving means 6
Numeral 2 is configured to rotate the converter lens support frame 30 at an arbitrary angle within a predetermined range in a vertical direction around a vertical rotation center axis 57.

The vertical rotation angle control drive means 62 includes an input gear 62a fixed concentrically to the vertical rotation center shaft 57. The input gear 62a has a rotation angle control drive source 62c fixed to the horizontal rotation frame 56.
Are engaged with each other. In this embodiment, the rotation angle control drive source 62c is constituted by, for example, a pulse motor.

Next, the operation of the camera according to the third embodiment of the present invention, which is configured as described above, will be described in detail with reference to FIGS. 6 to 10. .

FIG. 6A is a schematic side view of a main part of the camera according to the third embodiment of the present invention in a first photographing state; (B) is a schematic side view of a main part of a camera according to a third embodiment of the present invention, in a first example of a second shooting state;
FIG. 6C is a schematic side view of a main part of the camera according to the third embodiment of the present invention in a second example of the second shooting state.

FIG. 7A is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a third example of the second photographing state; FIG. 7B
FIG. 14 is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a fourth example of the second shooting state.

FIG. 8 is a schematic plan view of a main part of a camera according to a third embodiment of the present invention in a first shooting state.

FIG. 9A is a schematic plan view of a main part of a camera according to a third embodiment of the present invention in a fifth example of the second photographing state; FIG. 9B
FIG. 14 is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a sixth example of the second shooting state.

FIG. 10A shows the seventh photographing state in the second photographing state.
FIG. 11B is a schematic plan view of a main part of a camera according to a third embodiment of the present invention in an example; and FIG. 10B is in an eighth example of the second shooting state. FIG. 14 is a schematic side view of a main part of a camera according to a third embodiment of the present invention.

In this camera as well, the converter lens insertion / retraction / driving means 34 uses the converter lens support frame 30 with the converter lens 28 as indicated by the solid line in FIG. It can be selectively moved between the retracted position shown and the insertion position shown by a two-dot chain line in FIG.

Converter lens insertion / retraction / driving means 3
4 further shows, at the insertion position, two examples of a first photographing state as shown in FIG. 6A and a second photographing state as shown in FIGS. 6B and 6C (first example and first example). The converter lens support frame 30 can be displaced between the second embodiment and the second embodiment.

In the first photographing state, the optical axis 28a of the converter lens 28 coincides with the optical axis 10a of the lens barrel 10 (that is, the master lens optical system). Also, the second
In the two examples of the photographing state of FIG.
The optical axis 28a of the converter lens 28 does not coincide with a.

More specifically, in the first example of the second photographing state shown in FIG. 6B, the horizontal movement from the first photographing state shown in FIG. With the control drive unit 58, the horizontal rotation angle control drive unit 60, and the vertical rotation angle control drive unit 62 fixed,
The input gear 34a at the front end (the other end) of one of the converter lens rotation support arms 32 is used to insert / retract the converter lens.
It is rotated upward by + α ° by the driving means 34.
As a result, the optical axis 28a of the converter lens 28 becomes the optical axis 1 of the lens barrel 10 (that is, the master lens optical system).
It is inclined upward by + α ° with respect to 0a, and does not coincide with the optical axis 10a of the lens barrel 10.

In the second example of the second photographing state shown in FIG. 6C, the horizontal movement control driving means 58 starts from the first insertion state shown in FIG. With the horizontal rotation angle control drive means 60 and the vertical rotation angle control drive means 62 fixed, the input gear 34a at the front end of one of the converter lens rotation support arms 32 inserts, retracts, and drives the converter lens. It is pivoted downward by -α ° by means 34. As a result, the optical axis 28a of the converter lens 28 is inclined downward by -α ° with respect to the optical axis 10a of the lens barrel 10, so that the optical axis 10a of the lens barrel 10 is
does not match a.

Here, the displacement range between the two examples (first example and second example) of the second photographing state displaced up and down from the first photographing state at the above-described insertion position is the same as that of the lens barrel 10. From the master lens optical system to the converter lens 2
All the luminous fluxes traveling toward 8 are in the photographable range where they can pass through the converter lens 28.

It can be said that the converter lens 28 is inserted into the master lens optical system of the lens barrel 10 within this photographable range. Then, a tilt effect, which is a kind of tilting effect, can be exerted on the image of the subject passing through the master lens optical system in the vertical direction. The vertical direction is the direction of movement of the converter lens 28 between the retracted position and the inserted position.

As is apparent from the above detailed description, the converter lens insertion / retreat / drive means 34 is provided at the retreat position shown by the solid line in FIG. 1 and the first photographing shown in FIG. The movement of the converter lens 28 between the state and the two examples of the second photographing state shown in FIGS. 6B and 6C can be selectively driven.

If the image is within the above-mentioned photographable range, the horizontal movement control driving means 58, the horizontal rotation angle control driving means 60, and the vertical rotation are changed from the first photographing state shown in FIG. With the moving angle control driving means 62 fixed,
The converter lens 2 is positioned with respect to the optical axis 10a of the lens barrel 10.
The optical axis 28a can be adjusted to an arbitrary angle in both the up and down directions.

Further, in this embodiment, FIG.
Between the first photographing state shown in FIG. 6 and the second photographing state shown in FIGS. 6B and 6C, the horizontal movement control driving means 58 and the horizontal rotation. With the angle control driving means 60 fixed, the vertical rotation angle control driving means 62 (see FIG. 5) can be used as the converter lens optical axis angle adjusting means.

As a result, in the vertical direction, the optical axis 10 of the lens barrel 10 (ie, the master lens optical system)
The angle of inclination of the optical axis 28a of the converter lens 28 with respect to a can be adjusted.

For example, FIG. 7A shows the horizontal movement control driving means 58 from the first photographing state shown in FIG.
The input gear 34a at the front end of one of the converter lens rotation support arms 32 is rotated upward by + α ° by the converter lens insertion / retreat / drive unit 34 while the horizontal rotation angle control drive unit 60 is fixed. During the first example of the second photographing state before the photographing is performed, a state in which the vertical rotation angle control driving means 62 is rotated backward by + α ° is shown.

As a result, the optical axis 28a of the converter lens 28 is + y above the optical axis 10a while maintaining a state parallel to the optical axis 10a of the lens barrel 10 (that is, the master lens optical system). Translate by a distance.

FIG. 7B shows the horizontal movement control driving means 58 from the first photographing state shown in FIG.
The input gear 34a at the front end of one of the converter lens rotation support arms 32 is turned downward by -α ° by the converter lens insertion / retraction / drive means 34 while the horizontal rotation angle control driving means 60 is fixed. During the second example of the second photographing state before being moved, the state in which the vertical rotation angle control driving means 62 is rotated forward by -α ° is shown.

As a result, the optical axis 28a of the converter lens 28 is -y downward from the optical axis 10a while maintaining a state parallel to the optical axis 10a of the lens barrel 10 (that is, the master lens optical system). Translate by the distance of.

Here, the displacement range between the two examples (third and fourth examples) of the second insertion state displaced vertically and vertically in the first photographing state at the above-described insertion position is the lens barrel. All of the light beams coming from the master lens optical system 10 toward the converter lens 28 are converted by the converter lens 2.
This is the photographable range that can pass through 8.

It can be said that the converter lens 28 is inserted into the master lens optical system of the lens barrel 10 within this photographable range. Then, a shift effect, which is a kind of tilting effect, can be exerted on the image of the subject passing through the master lens optical system in the vertical direction. The vertical direction is the direction of movement of the converter lens 28 between the retracted position and the inserted position.

In this embodiment, the converter lens inserting / retracting / driving means 34 and the horizontal movement control driving means 5 are further changed from the first photographing state shown in FIG.
8 (see FIG. 5) and the vertical rotation angle control drive means 60 (see FIG. 5) are fixed while the vertical rotation angle control drive means 62 (see FIG. 5) is fixed. It can be used as a means.

As a result, in the horizontal direction on the left and right, two further photographing states in the second photographing state in which the optical axis 28a of the converter lens 28 does not coincide with the optical axis 10a of the lens barrel 10 (that is, the master lens optical system). Examples (fifth and sixth examples) can be set.

The left and right horizontal directions correspond to the converter lens 28.
This is a direction orthogonal to the up-down direction, which is the direction of movement between the retracted position and the inserted position.

The horizontal rotation angle control driving means 60 (FIG. 5)
8), a horizontal rotation frame 56 is rotated around the horizontal rotation center axis 54 by a predetermined rotation on both left and right sides of the optical axis 10a of the lens barrel 10 from the first imaging state shown in FIG. It can be rotated within the range of the movement angle. In the horizontal direction on the left and right, the angle at which the optical axis 28a of the converter lens 28 is inclined with respect to the optical axis 10a of the lens barrel 10 can be arbitrarily set within a predetermined range.

For example, FIG. 9A shows the converter lens insertion / retreat / drive means 34, the horizontal movement control drive means 58 (see FIG. 5), and the vertical rotation angle control drive means from the first photographing state. Reference numeral 62 (see FIG. 5) shows a state in which the horizontal rotation frame 56 has been rotated leftward in the left and right horizontal directions by + γ ° by the horizontal rotation angle control driving means 60 while being fixed. .

As a result, the optical axis 28a of the converter lens 28 is + γ ° with respect to the optical axis 10a of the lens barrel 10.
5 shows a fifth example of the second insertion state in which the optical axis 10a is inclined only to the right and does not coincide with the optical axis 10a.

FIG. 9B shows the converter lens inserting / retracting / driving means 34, the horizontal movement control driving means 58 (see FIG. 5), and the vertical rotation angle control driving means 62 from the first photographing state. (See FIG. 5) shows a state in which the horizontal rotation frame 56 is rotated rightward in the left and right horizontal directions by −γ ° by the horizontal rotation angle control driving means 60 while being fixed. .

As a result, the optical axis 28a of the converter lens 28 is -γ ° with respect to the optical axis 10a of the lens barrel 10.
6 shows a sixth example of the second insertion state in which the optical axis 10a is tilted only to the left and does not coincide with the optical axis 10a.

Here, the displacement range between the two examples (fifth and sixth examples) of the second insertion state displaced left and right from the first photographing state at the above-described insertion position is the master of the lens barrel 10. Converter lens 28 from lens optics
Is in a photographable range in which all of the light beams traveling toward can pass through the converter lens 28.

It can be said that the converter lens 28 is inserted into the master lens optical system of the lens barrel 10 within this photographable range. Then, a tilt effect, which is a kind of tilting effect, can be exerted on the image of the subject passing through the master lens optical system along the left-right direction.

In this embodiment, the converter lens inserting / retracting / driving means 34 and the horizontal rotation angle control driving means 60 (from the first insertion state shown in FIG. While the vertical rotation angle control drive means 62 (see FIG. 5) is fixed,
The horizontal movement control drive means 58 (see FIG. 5) can be used as the converter lens parallel movement means.

As a result, in the horizontal direction on the left and right, the optical axis 28a of the converter lens 28 does not coincide with the optical axis 10a of the lens barrel 10 (that is, the master lens optical system). One example (seventh and eighth examples) can be set.

The horizontal movement control driving means 58 shifts from the first insertion state shown in FIG.
Evacuation / drive means 34, horizontal rotation angle control drive means 6
0 (see FIG. 5), and the vertical movement angle control driving means 62 (see FIG. 5) is fixed, and the horizontal movement frame 52 is moved along the horizontal movement guide member 50 so that the optical axis 10 of the lens barrel 10 is moved.
can be moved to the left and right sides within a predetermined distance.

As a result, the converter lens 2 is positioned with respect to the optical axis 10a of the lens barrel 10 in the left and right horizontal directions.
The distance by which the eight optical axes 28a translate can be arbitrarily set within a predetermined range.

For example, FIG. 10A shows the converter lens insertion / retreat / drive means 34 and the horizontal rotation angle control drive means 60 (FIG. 5) from the first insertion state shown in FIG.
And the vertical rotation angle control driving means 62 (see FIG. 5) is fixed and the horizontal movement control driving means 58 is fixed.
Indicates that the horizontal rotation frame 56 has been moved horizontally along the horizontal movement guide member 50.

As a result, the optical axis 10 of the lens barrel 10 is
The optical axis 28a of the converter lens 28 translates by + δ with respect to a, and the seventh example of the second insertion state that does not coincide with the optical axis 10a is set.

FIG. 10B shows the converter lens insertion / retraction / driving means 34, the horizontal rotation angle control driving means 60 (see FIG. 5), and the first photographing state shown in FIG. The vertical rotation angle control driving means 62 (FIG. 5)
3) shows a state in which the horizontal rotation frame 56 is horizontally moved along the horizontal movement guide member 50 by the horizontal movement control drive means 58 while being fixed.

As a result, the optical axis 10 of the lens barrel 10 is
The optical axis 28a of the converter lens 28 moves parallel to -a by -δ with respect to a, and the eighth example of the second insertion state that does not match the optical axis 10a is set.

Here, the displacement range between the seventh and eighth examples of the second photographing state displaced to the left and right of the above-mentioned first photographing state is from the master lens optical system of the lens barrel 10 to the converter lens 28. All of the incoming luminous flux is in a photographable range in which the luminous flux can pass through the converter lens 28.

Within this range, the converter lens 28
Can be said to be inserted into the master lens optical system of the lens barrel 10.

As a result, a shift effect, which is a kind of tilting effect, can be exerted on the image of the subject passing through the master lens optical system along the left-right direction.

Of course, in the third embodiment, the second photographing state is one of the first and second examples, one of the third and fourth examples, and the fifth photographing state. One of the examples and the sixth example, and one of the seventh and eighth examples described above can be arbitrarily combined.

As is clear from the above, the camera according to the present invention can be described as follows.

[0120] 1. A converter lens is provided movably between an insertion position inserted into the master lens optical system and a retracted position retracted outside the master lens optical system, and the focal length is increased by inserting and retracting the converter lens. In the camera provided with the imaging optical system to be changed, in the insertion position, a first imaging state in which the optical axis of the converter lens coincides with the optical axis of the master lens optical system; On the other hand, the camera can be displaced between a second shooting state in which the optical axis of the converter lens does not match.

2. The optical axis of the converter lens is inclined with respect to the optical axis of the master lens optical system in the second photographing state, thereby enabling photographing with a tilt effect. camera.

3. The optical axis of the converter lens is moved in parallel with the optical axis of the master lens optical system in the second photographing state, thereby enabling photographing with a shift effect. camera.

4. (1) to (1), wherein a converter lens inserting / retracting / driving means for selectively driving movement of the converter lens between the first and second photographing states at the inserting position and the retracted position is provided. The camera according to any one of the above three items.

[0124] 5. The converter lens inserting / retracting / driving means can adjust an angle at which the optical axis of the converter lens is inclined with respect to the optical axis of the master lens optical system in the second photographing state of the converter lens. Camera according to item.

6. A converter lens optical axis angle adjusting means capable of adjusting an angle at which the optical axis of the converter lens is inclined with respect to the optical axis of the master lens optical system in the second photographing state of the converter lens. Item 6. The camera according to item 4 or the above item 5.

7. The converter lens optical axis angle adjusting means tilts the optical axis of the converter lens with respect to the optical axis of the master lens optical system along the direction of movement of the converter lens between the first and second photographing states and the retracted state. 7. The camera according to the above item 6, wherein the angle is adjustable.

8. The converter lens optical axis angle adjusting means adjusts the optical axis of the converter lens along the direction orthogonal to the direction of movement of the converter lens between the first and second photographing states and the retracted position by the light of the master lens optical system. The camera according to the above item 6 or 7, wherein an angle of inclination with respect to the axis is adjustable.

9. In the second shooting state of the converter lens, the optical axis of the converter lens moves along the direction orthogonal to the direction of movement of the converter lens between the first and second shooting states and the retracted position. The camera according to any one of claims 1 to 8, further comprising a converter lens parallel movement unit that allows parallel movement with respect to the optical axis.

10. A converter lens provided movably between an insertion position inserted into the master lens optical system at a position where the optical axes coincide with each other and a retracted position retracted outside the master lens optical system; In a camera having an imaging optical system whose focal length is changed by insertion and retraction, a drive source for driving insertion and retraction of the converter lens is provided, and the converter lens at the insertion position is retracted by the driving source. A camera driven to a position different from the position so that the optical axis of the converter lens does not coincide with the optical axis of the master lens optical system.

[0130] 11. A converter lens provided movably between an insertion position inserted into the master lens optical system at a position where the optical axes coincide with each other and a retracted position retracted outside the master lens optical system; In a camera provided with a photographing optical system whose focal length is changed by insertion and retraction, an insertion / retraction drive unit for inserting and retreating the converter lens, and a converter lens when the insertion / retraction drive unit is at the insertion position Is driven so as to be in a state different from the retracted position so that the optical axis of the converter lens does not coincide with the optical axis of the master lens optical system.

12. A converter lens is provided movably between an insertion position inserted into the master lens optical system and a retracted position retracted outside the master lens optical system, and the focal length is increased by inserting and retracting the converter lens. In a camera provided with an imaging optical system to be changed, a first imaging state in which a converter lens is inserted at a first insertion position where an optical axis of a converter lens coincides with an optical axis of a master lens optical system; Inserting the converter lens at the second insertion position where the optical axis of the converter lens does not match the optical axis of the lens optical system.
And a driving means for switching between a first shooting state and a second shooting state.

13. A converter lens built into the camera body and movably provided between an insertion position inserted into the master lens optical system and a retracted position retracted out of the master lens optical system, wherein the converter lens is inserted; And a driving means for driving the converter lens around two mutually different axes substantially orthogonal to the optical axis of the master lens optical system in a camera having an imaging optical system whose focal length is changed by evacuation. And controlling the driving means when the converter lens is at the insertion position to obtain at least one of a tilt effect and a shift effect with respect to the optical axis of the master lens optical system. A positional relationship between optical axes of the cameras.

14. 14. The camera according to claim 13, further comprising an insertion / retreat driving means for driving movement of the converter lens between the insertion position and the retreat position, separately from the driving means.

15. A master lens optical system, one end holding the converter lens and the other end rotatably supported outside the master lens optical system, and an insertion position where the converter lens is inserted into the master lens optical system; A converter lens rotation support arm rotatable around the other end between the retracted position retracted out of the master lens optical system, and a converter lens rotating support arm between the insertion position and the retracted position. What is claimed is: 1. A camera provided with an imaging optical system in which a focal length is changed by movement, wherein a first imaging state in which an optical axis of a converter lens coincides with an optical axis of a master lens optical system in the insertion position, and a conversion state of the converter lens. Second not to align the optical axis with the optical axis of the master lens optical system
Wherein the converter lens rotation support arm can be displaced between the camera state and the photographing state.

16. A converter lens light capable of adjusting the angle of the optical axis of the converter lens with respect to the optical axis of the master lens optical system along the rotation direction of the converter lens rotation support arm between the insertion position and the retracted position in the second shooting state. 16. The camera according to the above item 15, wherein the shaft angle adjusting means is provided at one end of the converter lens rotation support arm.

17. In the second photographing state, the angle of the optical axis of the converter lens with respect to the optical axis of the master lens optical system can be adjusted along a direction orthogonal to the rotation direction of the converter lens rotation support arm between the insertion position and the retracted position. 17. The camera according to item 15 or 16, wherein the converter lens optical axis angle sub-adjustment means is provided at one end of the converter lens rotation support arm.

18. In the second photographing state, the optical axis of the converter lens is moved parallel to the optical axis of the master lens optical system along a direction orthogonal to the rotation direction of the converter lens rotation support arm between the insertion position and the retracted position. 18. The camera according to any one of the above items 15 to 17, wherein a converter lens optical axis parallel moving means is provided at one end of the converter lens rotation support arm.

[0138]

As is clear from the above description,
ADVANTAGE OF THE INVENTION In the camera according to this invention, while being able to perform at least a part of various tilting effects, the configuration is simple and inexpensive, and the external dimensions can be made smaller than the conventional example.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a camera according to a first embodiment of the present invention.

FIG. 2A is a schematic side view of a main part of the camera according to the first embodiment of the present invention in a first shooting state; FIG. 2B is a first shooting state; FIG. 3C is a schematic rear view of a main part of the camera according to the first embodiment of the present invention in a first state; FIG. 3C is a first embodiment of the present invention in a first example of a second photographing state; FIG. 4D is a schematic side view of a main part of the camera according to the first embodiment; and (D) is a camera according to the first embodiment of the present invention in a second example of the second shooting state. It is a schematic side view of a main part.

FIG. 3A is a schematic side view of a main part of a camera according to a second embodiment of the present invention in a first shooting state; FIG. 3B is a first shooting state; FIG. 9C is a schematic rear view of a main part of the camera according to the second embodiment of the present invention in a second state; FIG. FIG. 9 is a schematic side view of a main part of the camera according to the embodiment; and (D) is a camera according to the second embodiment of the present invention in a second example of the second shooting state. It is a schematic side view of the principal part of.

FIG. 4A is a schematic side view of a main part of a camera according to a second embodiment of the present invention in a third example of the second shooting state; and FIG. FIG. 14 is a schematic side view of a main part of the camera according to the second embodiment of the present invention in a fourth example of the second shooting state.

FIG. 5 is a schematic perspective view of a main part of a camera according to a third embodiment of the present invention.

FIG. 6A is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a first shooting state; FIG. 6B is a second shooting state; FIG. 9 is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a first example of a state; and (C) is in a second example of a second shooting state. FIG. 13 is a schematic side view of a main part of a camera according to a third embodiment of the present invention.

FIG. 7A is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a third example of the second shooting state; and FIG. FIG. 14 is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a fourth example of the second shooting state.

FIG. 8 is a schematic plan view of a main part of a camera according to a third embodiment of the present invention in a first shooting state.

FIG. 9A is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a fifth example of the second shooting state; and FIG. FIG. 15 is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a sixth example of the second shooting state.

FIG. 10A is a schematic side view of a main part of a camera according to a third embodiment of the present invention in a seventh example of the second shooting state; and FIG. FIG. 18 is a schematic side view of a main part of a camera according to a third embodiment of the present invention in an eighth example of the second shooting state.

[Explanation of symbols]

Reference Signs List 10 lens barrel (master lens optical system) 10a optical axis 28 converter lens 28a optical axis 34 converter lens insertion / retreat / drive means 42 converter lens optical axis angle adjustment means 58 horizontal movement control drive means (converter lens parallel movement means) 60 Horizontal rotation angle control drive unit (converter lens optical axis angle sub-adjustment unit) 62 Vertical rotation angle control drive unit (converter lens optical axis angle adjustment unit)

Claims (3)

[Claims] A converter lens movably provided between an insertion position inserted into the master lens optical system and a retracted position retracted out of the master lens optical system. In a camera provided with an imaging optical system whose focal length is changed by retreating, a first imaging state in which the optical axis of the converter lens coincides with the optical axis of the master lens optical system at the insertion position; The camera can be displaced between a second shooting state in which the optical axis of the converter lens does not coincide with the optical axis of the system. 2. The optical system according to claim 1, wherein the optical axis of the converter lens is inclined with respect to the optical axis of the master lens optical system in the second photographing state, thereby enabling photographing with a tilt effect. Item 2. The camera according to Item 1. 3. An optical axis of a converter lens is moved in parallel with an optical axis of a master lens optical system in a second photographing state, thereby enabling photographing with a shift effect. Item 2. The camera according to Item 1.