JP2002014390A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera by which a photographing distance is easily and exactly confirmed in the case of performing close-up photographing in the photographing distance shorter than an ordinary photographing close distance. SOLUTION: This camera 10 is provided with a rangefinder optical system 78, and the half prism 86 of the optical system 78 is arranged so that is can be inserted in/pulled out from a finder optical system 50. When the camera 10 is set to a macro mode, the prism 86 is inserted in the optical system 50, and double images by the optical systems 50 and 78 are displayed within finder field. Thus, a photographer recognizes the position of the camera 10 to a subject when the double images agree with each other as the photographing distance at the time of close-up photographing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of easily measuring the shooting distance when taking a close-up shot at a shooting distance shorter than the closest shooting distance.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 7-49529 discloses a close-up stand used for close-up photography. This close-up stand has the same shooting distance and the same height during close-up shooting, so the camera body is connected to the top of the close-up stand, and the subject is set at the bottom of the close-up stand. can do.

[0003] Also, Japanese Patent Application Laid-Open No. 8-15763 discloses that
A close-up adapter detachably attached to a camera body is disclosed. According to this close-up adapter, the strap attached to the close-up adapter is also used as a distance measurement gauge, and the strap is extended forward in parallel with the photographing optical axis, so that the photographing distance during close-up photographing can be measured.

[0004]

However, according to the technique disclosed in Japanese Patent Application Laid-Open No. 7-49529, for example, if the shooting distance during close-up shooting is 60 cm, it is difficult to carry a large close-up stand having a height of 60 cm. There was a drawback that it was very troublesome.

In the technique disclosed in Japanese Patent Application Laid-Open No. 8-15763, the photographer holds the camera body with one hand and extends the strap toward the subject with the other hand, forcing the photographer to take an unreasonable posture. There was a disadvantage. Also,
Even when the photographing distance is measured using a strap, the strap is released from the subject so that the strap is not photographed during photographing.

The present invention has been made in view of such circumstances, and when close-up photographing is performed at a specific photographing distance shorter than the normal photographing closest distance, the photographing distance can be easily and accurately confirmed. The purpose is to provide a camera.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a zoom lens device, a zoom finder optical system and a zoom distance meter optical system interlocked with the zoom lens device, and a normal photographing distance. A camera with a normal mode for shooting with a macro mode for close-up shooting at a shooting distance shorter than the normal shooting close-up distance, wherein a half mirror or a half prism of the zoom rangefinder optical system,
When placed in the normal mode, the half mirror or the half prism is retracted from the zoom finder optical system,
When the macro mode is set, the half mirror or the half prism is inserted into the zoom finder optical system, and when a double image of the zoom finder optical system and the zoom rangefinder optical system displayed in the finder field of view matches. Is set as the shooting distance in the macro mode.

In order to achieve the above object, the present invention comprises a finder optical system and a range finder optical system, and a normal mode for photographing at a normal photographing distance, and a normal mode for photographing at a photographing distance shorter than the closest photographing distance. A camera having a macro mode for photographing, wherein a half mirror of the rangefinder optical system is arranged to be insertable into and removable from a finder optical system, and when the normal mode is set, the half mirror is moved from the finder optical system. When retracted and set to the macro mode, the half mirror is inserted into the finder optical system, and the shooting distance when the double image of the finder optical system and the rangefinder optical system displayed in the finder field of view coincides. Is the photographing distance in the macro mode, and the optical axis of the finder optical system is directed to the optical axis of the photographing optical system depending on the thickness of the half mirror. By moving Te, and correcting the parallax.

According to the first aspect of the present invention, a camera is provided with a zoom distance meter optical system, and a half mirror or a half prism of the zoom distance meter optical system is arranged so as to be insertable into and removable from the zoom finder optical system. When the macro mode is set, the half mirror or the half prism is inserted into the zoom finder optical system to display a double image of the zoom finder optical system and the zoom range finder optical system in the finder field. This allows the photographer to recognize that the position of the camera with respect to the subject when the double images match is the shooting distance during close-up shooting. Therefore, according to the present invention, the shooting distance at the time of close-up shooting can be easily and accurately confirmed.

According to the second aspect of the present invention, the half mirror of the range finder optical system is arranged so as to be insertable into and removable from the finder optical system, and when the camera is set to the macro mode, the half mirror is connected to the finder optical system. To display a double image of the finder optical system and the rangefinder optical system in the finder visual field. The rangefinder optical system is located closer to the photographing optical system than the finder optical system, and when the half mirror is inserted into the finder optical system, the thickness of the half mirror causes the Since the optical axis is moved toward the optical axis of the photographing optical system and the parallax is corrected, the subject can be accurately framed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a camera according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a front perspective view of a camera 10 and FIG.
Shows a rear view thereof. As shown in FIG. 1, a photographing lens barrel 14 having a zoom function is disposed substantially at the center of the front surface of the camera body 12. Also, a photographing lens barrel 1
A rangefinder window 16 and an objective window 18 of an optical finder are arranged above the window 4. On both sides of the objective window 18, windows 20 having an autofocus sensor and an exposure sensor are arranged. A flash device 22 is disposed at the upper right corner of the front of the camera body 12 in FIG.
Further, on the left side of the upper surface of the camera body 12, a shutter button 24 operated by the photographer's right hand is provided.

In the normal mode, the shooting distance of the camera 10 is set to 1 m to ∞, and in the macro mode, the shooting distance is set to, for example, 60 cm. Furthermore, when the zoom lens 30 of the photographing lens 26 is changed to the macro mode, it is moved to the tele end position. Thus, close-up shooting of the subject can be performed at a high magnification. Note that the moving position of the zoom lens 30 in the macro mode is not limited to the tele end position, and may be moved to a desired position of the zoom stage.

As shown in FIG. 2, an eyepiece window 32 of an optical viewfinder is disposed substantially at the upper center of the rear surface of the camera body 12. In addition, on the left side of the eyepiece window 32, normal photographing (NORMA
A mode changeover switch 34 for switching between L) and close-up photography (MACRO) is provided. When the changeover switch 34 is slid to the left to switch to the NORMAL side, the shooting distance is set to 1 m to ∞ as described above. Then, when the changeover switch 34 is slid to the right to switch to the MACRO side, the projection 38 formed on the main body 36 of the changeover switch 34 closes the leaf switch 40, as shown by the solid line in FIG. When the leaf switch 40 is closed, a close signal is output to a CPU (Central Processing Unit) 41 for controlling the entire camera 10, and the CPU 41 drives the focus lens drive motor 29 to macro-photograph the focus lens 28. Move to position. Thus, the shooting distance is set to 60 cm as described above.

In FIG. 2, a zoom lever 42 is provided at the upper right corner on the rear surface of the camera body 12 so as to be vertically swingable. By operating the zoom lever 42 up and down, the zoom lens drive motor 31 shown in FIG. 3 is driven, and the zoom lens 30 moves back and forth along the photographing optical axis P1. Thereby, zooming is performed.

A rectangular liquid crystal panel 44 is arranged below the eyepiece window 32 shown in FIG. The liquid crystal panel 44 displays shooting modes indicating the number of film shots, the remaining battery level, auto mode, red-eye prohibition, and the like. Below the liquid crystal panel 44, a power ON / OFF button 46 of the camera 10 and a button 48 for selecting the shooting mode are arranged.

Incidentally, the finder optical system 5 shown in FIG.
Reference numeral 0 denotes a zoom finder including a front lens group 52 and a rear lens group 54. The front lens group 52 includes a holding frame 56.
And the cam pins 58 projecting from the holding frame 56 are inserted into the cam grooves 6 of the cam plate 60 shown by two-dot chain lines in FIG.
2 are slidably engaged. Similarly, the rear group lens 5
4 is also held by the holding frame 64, and a cam pin 66 protruding from the holding frame 64 is slidably engaged with a cam groove 68 of the cam plate 60.

The holding frames 56 and 64 are provided in the finder optical system 5.
It is slidably supported by a guide rod 70 arranged in parallel with the optical axis P2 of the zero. On the other hand, a rack 72 is formed at the edge of the cam plate 60, and a pinion 74 is meshed with the rack 72. The pinion 74 is connected to the output gear of the zoom lens driving motor 31 via a gear train (not shown), and is rotated by the driving force of the zoom lens driving motor 31. As a result, the cam plate 60 is moved up and down in FIG. 3, so that the front group lens 52 and the rear group lens 54 are guided by the cam grooves 62 and 68 while the optical axis P2
Move back and forth along With this operation, zooming is performed on the finder side, and a subject image having an angle of view substantially equal to the angle of view set by the zoom lens 30 is observed from the eyepiece window 32. After passing through the rear group lens 54, the subject light passes through the field frame 75, is reflected a plurality of times by the prism 76, and is guided to the eyepiece window 32.

On the other hand, a distance meter optical system 78 shown in FIG. 3 is a zoom distance meter including a front lens group 80, a reflection mirror 82, a rear lens group 84, and a half prism (or a half mirror) 86. The front lens group 80 is held by a holding frame 88, and a cam pin 90 protruding from the holding frame 88 is slidably engaged with a cam groove 92 of the cam plate 60.

The reflecting mirror 82 is fixed at a position where the subject light passing through the front group lens 80 can be reflected toward the rear group lens 84, and the subject image by the rangefinder optical system 78 and the subject image by the finder optical system 50. The image is 60c
The fixed angle is set to an angle θ that matches at a shooting distance of m.

The rear group lens 84 is held by a holding frame 94, which is pivotally supported at one end of an L-shaped arm 98 via a pin 100. A cam pin 102 projects from the other end of the arm 98, and the cam pin 102 is slidably engaged with a cam groove 104 of the cam plate 60. The arm 98 is pivotally supported by the camera body 12 via a pin 96.

The holding frame 88 is slidably supported by a guide rod 106 disposed in parallel with the optical axis P2 of the finder optical system 50, and the holding frame 94 is disposed in a direction perpendicular to the optical axis P2. 108 slidably supported. Thus, when the cam plate 60 is moved up and down in FIG. 3, the front lens group 80 moves back and forth in parallel with the optical axis P2 while being guided by the cam grooves 92, and the rear lens group 84
Moves back and forth in the direction orthogonal to the optical axis P2 while being guided by the cam groove 104 via the arm 98. Zooming is performed by this operation. And half prism 8
3 is inserted into the finder optical system 50 as shown by the solid line in FIG. At this time, a double image of the subject image of the finder optical system 50 and the subject image of the range finder optical system 78 is observed in the eyepiece window 32.
Matched when set to a shooting distance of 0 cm. Thus, the subject can be photographed in close proximity in focus.

Next, a method of using the camera 10 configured as described above will be described.

First, when taking a close-up photograph using the camera 10, the changeover switch 34 shown in FIG. 2 is operated to the MACRO side. Thereby, the main body 3 of the changeover switch 34 in FIG.
6 closes the leaf switch 40, so that the CPU 41
Is driven to move the focus lens 28 to the macro shooting position. Thereby, the shooting distance is set to 60 cm.

At this time, the half prism 86 is inserted into the finder optical system 50.
A double image of the subject image of the finder optical system 50 and the subject image of the rangefinder optical system 78 is observed. Then, the photographer brings the camera 10 closer to or farther from the subject while looking through the eyepiece window 32 to match the double images. As a result, the camera 10 is set to a shooting distance of 60 cm, which is a close-up shooting position. Therefore, with this camera 10, the shooting distance at the time of close-up shooting can be easily and accurately confirmed. Then, when the shutter button 24 is operated to release, the subject is photographed in close proximity with focus.

On the other hand, when performing normal photographing using the camera 10, the changeover switch 34 in FIG. 2 is operated to the NORMAL side. As a result, the leaf switch 40 is opened, so that the CPU 41 drives the focus lens drive motor 29 to move the focus lens 28 from the macro shooting position to the normal shooting position. As a result, it is possible to perform autofocus shooting at a normal shooting distance of 1 m to ∞. At this time, since the half prism 86 is retracted from the finder optical system 50, only the subject image of the finder optical system 50 is displayed on the eyepiece window 32.

FIG. 4 is a structural view of a finder optical system and a rangefinder optical system according to the second embodiment. The first embodiment shown in FIG.
Members that are the same as or similar to those of the above embodiment are given the same reference numerals, and descriptions thereof are omitted.

The structure shown in FIG. 4 has a predetermined thickness T (see FIG. 5).
Is configured so as to be freely inserted into and removed from the finder optical system 50. When the half mirror 110 is inserted into the finder optical system 50, the optical axis P2 of the finder optical system 50 is changed to the photographing optical axis P1 depending on the thickness of the half mirror 110.
(Moved from P2 to P2 ′) to reduce parallax.

The half mirror 110 is provided with a changeover switch 34
Is attached to an arm 112 connected to the main body 36 of the first embodiment. The arm 112 has a pin 114
And the camera body 12 via a pin 116. Therefore, the changeover switch 3
4 is moved to the NORMAL side shown by the two-dot chain line in FIG. 4, the half mirror 110 is moved to the finder optical system 5 as shown by the two-dot chain line.
Saved from 0. When the changeover switch 34 is moved to the MACRO side as shown by the solid line in FIG.
Is inserted into the finder optical system 50 so that a double image can be seen from the eyepiece window 32. Further, in order to suppress parallax between the rangefinder optical system 78 and the photographing lens 26, the rangefinder optical system 78 is connected to the viewfinder optical system 5 with respect to the photographing optical system.
It is arranged on the side closer to 0. As a result, the subject can be accurately framed and focused.

In the second embodiment, when the leaf switch 40 is opened, the CPU 41 drives the focus lens drive motor 29 to drive the focus lens 28.
Is moved to the macro shooting position. This enables close-up photography. The leaf switch 40 is connected to the main body 36.
Is closed by the projection 38, the CPU 41 moves the focus lens 28 from the macro shooting position to the normal shooting position, thereby enabling autofocus shooting at the normal shooting distance of 1 m to ∞. Further, the second embodiment is not limited to the zoom finder optical system and the zoom range finder optical system.

[0031]

As described above, according to the camera of the present invention, the zoom distance meter optical system is provided in the camera, and the half mirror or half prism of the zoom distance meter optical system can be inserted into and removed from the zoom finder optical system. Placed in
When the camera is set to the macro mode, the half mirror or the half prism is inserted into the zoom finder optical system, and a double image of the zoom finder optical system and the zoom rangefinder optical system is displayed in the finder field of view. Since the position at which the images match is recognized as the shooting distance during close-up shooting, the shooting distance during close-up shooting can be easily and accurately confirmed.

According to the present invention, when the half mirror is inserted into the finder optical system when the macro mode is set,
The parallax is corrected by moving the optical axis of the finder optical system toward the optical axis of the photographing optical system according to the thickness of the half mirror, so that the subject can be accurately framed.

[Brief description of the drawings]

FIG. 1 is a front perspective view of a camera to which the present invention is applied.

FIG. 2 is a rear view of the camera of FIG. 1;

FIG. 3 is a structural diagram of a finder optical system and a rangefinder optical system according to the first embodiment;

FIG. 4 is a structural diagram of a finder optical system and a rangefinder optical system according to a second embodiment;

FIG. 5 is an enlarged view of the half mirror shown in FIG. 4;

[Explanation of symbols]

10 camera, 26 photographing lens, 28 focus lens, 30 zoom lens, 34 changeover switch, 40
... leaf switch, 50 ... finder optical system, 60 ... cam plate, 78 ... rangefinder optical system, 86 ... half prism, 1
10. Half mirror

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 17/02 G02B 7/18 B

Claims (2)

[Claims] 1. A normal mode for photographing at a normal photographing distance, comprising a zoom lens device, a zoom finder optical system and a zoom distance meter optical system interlocked with the zoom lens device, and a photographing distance shorter than a normal photographing closest distance A macro mode for taking close-up images in a camera, wherein a half mirror or a half prism of the zoom range finder optical system is disposed so as to be insertable into and removable from a zoom finder optical system, and is set to the normal mode. When the half mirror or the half prism is retracted from the zoom finder optical system and the macro mode is set, the half mirror or the half prism is inserted into the zoom finder optical system, and the zoom finder optical system is displayed in the finder visual field. The macro is used to set the shooting distance when the double image with the zoom rangefinder optical system matches. Camera, characterized in that the object distance over de. 2. A camera comprising a finder optical system and a rangefinder optical system, and having a normal mode for photographing at a normal photographing distance and a macro mode for photographing close-up at a photographing distance shorter than the normal photographing closest distance. When the half mirror of the rangefinder optical system is arranged to be insertable into and removable from the finder optical system and is set in the normal mode, the half mirror is retracted from the finder optical system and is set in the macro mode. The half mirror is inserted into the viewfinder optical system, and the shooting distance when the double image of the viewfinder optical system and the rangefinder optical system displayed in the viewfinder field of view coincides with the shooting distance in the macro mode, The parallax is reduced by moving the optical axis of the finder optical system toward the optical axis of the photographing optical system depending on the thickness of the half mirror. Camera, characterized in that positive to.