JP2002250969A - Close-up adapter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly irradiate a subject with strobe light at the time of super close-up photographing. SOLUTION: This close-up adapter 20 is composed of an adapter main body 21 made of transparent plastic material and a rubber string 22. A coating part 23 is provided on the main body 21 and a reflector 21 is arranged on the back side thereof. A light shielding barrel 30 made of plastic material having light shielding property is attached to the main body 21. A close-up lens 27 is held inside the barrel 30. The strobe light radiated from a strobe light emitting window 9 is reflected on the reflector 29 and made incident on the inner part of the main body 21 through an incident surface formed on the main body 21. Thus, diffused light emitted from the main body 21 and projected from the vicinity of the close-up lens 27 is radiated to the subject.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a close-up adapter which is mounted on a camera or a film unit with a lens to enable close-up photography.

[0002]

2. Description of the Related Art As a simple camera capable of easily taking a photograph, a film unit with a lens is provided by the present applicant. In this film unit with a lens, an unexposed photographic film is previously loaded in a unit body in which a simple photographing device such as a strobe device and an exposure device is incorporated.

When a subject image at a short distance is photographed by the film unit with a lens, a blurred subject image that is out of focus is exposed on a photographic film. In order to solve this problem, a close-up adapter with a close-up lens, which is attached to a normal film unit with a lens so that short-distance shooting can be performed, has been provided by the present applicant (Japanese Patent Application Laid-Open No. 11-38480). ). If this close-up adapter is attached to a film unit with a lens, short-distance shooting can be performed.

Recently, the present applicant has provided a film unit with a lens capable of performing normal photographing and close-up photographing such as self-shot photographing in which the photographer takes a photograph as a subject. Switching between normal shooting and close-up shooting is performed by a slide operation of a slide lever provided on the front surface of the film unit with a lens. For example, when the slide lever is at the close-up photographing position, the front surface of the strobe light emission window is partially covered, so that the amount of strobe light irradiation can be suppressed. As a result, overexposure of an image can be prevented even in close-up shooting.

[0005]

However, the shooting distance for close-up shooting using a film unit with a lens to which the above-mentioned adapter is attached or a film unit with a lens capable of close-up shooting is about 40 cm to 1 m. There is a problem that the image size of the service print obtained from the photo film taken in close-up is smaller than the actual one, and is not suitable for recording coins and stamps or photographing small animals such as birds and hamsters. In addition, when shooting is performed closer than the shooting distance of close-up shooting (hereinafter referred to as “super close-up shooting”), the irradiation area of the strobe light greatly deviates from the shooting range, and an image with uneven light amount is shot. There is. It should be noted that the same problem occurs in a strobe device or a camera such as a compact camera or digital camera having a fixed taking lens.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a close-up adapter which can be mounted on a camera or a film unit with a lens so that a clear image of a subject can be photographed even in a very close-up photographing mode.

[0007]

In order to achieve the above object, a close-up adapter according to the present invention comprises an adapter body detachably attached to the front of a lens-fitted film unit in which a strobe light emission window and a taking lens are incorporated. A close-up lens positioned at the front of the taking lens when attached to the film unit with the lens, wherein the adapter body is at least partially molded from a light-transmissive plastic material, The adapter body is provided with light guide means for guiding the strobe light from the strobe light emission window toward the close-up lens through the inside of the adapter body, and irradiates the subject with light emitted from the vicinity of the close-up lens of the adapter body. Is to do so. Further, it is preferable that the reflection surface is formed of a reflection plate attached to the adapter body. In addition, a concave portion is formed on the surface of the adapter body near the close-up lens opposite to the subject, and a deep wall of the concave portion is curved so as to protrude toward the subject, and a large number of irregularities are formed on the rear wall. Is preferred. In addition, the concave portion is provided as a pair with the close-up lens interposed therebetween,
When the adapter body is mounted on a camera or a film unit with a lens, it is preferable that the size of the recess farther from the strobe light emission window be larger than the size of the recess closer to the strobe light emission window.

As another method, the adapter body is
Provide a light guide member molded from a transparent plastic material,
The light incident surface of the light guide member may be provided at a position facing the strobe light emission window, and the light exit surface may be provided near the close-up lens. It is preferable that light emitted from the vicinity of the close-up lens be made substantially uniform around the close-up lens. Further, the adapter body is provided with a light-shielding cylinder for preventing flare made of a light-shielding plastic material,
It is preferable that the close-up lens is disposed inside the light-shielding tube, and the rear end surface of the light-shielding tube extends toward the front side of the film unit with the lens. In addition, it is preferable to provide an abutting member at a front portion of the adapter main body to keep a distance from the close-up lens to the subject constant by abutting the vicinity of the subject or a part of the subject.

[0009]

FIG. 1 shows the appearance of a close-up adapter embodying the present invention and a film unit with a lens to which the close-up adapter is mounted. The film unit with lens 2 includes an unexposed photographic film,
A cartridge for storing a photographed film is already loaded. Further, an outer label 4 is wound around the center of the unit body 3.

The unit main body 3 is mainly made of a plastic molded product, and a photographing lens 6, an object side finder window 7, a strobe light emission window 8, a strobe charging switch 9, a self-photographing mirror 10, a photographing distance are provided on a front surface thereof. A switching lever 11 is provided. A release button 12, a hoisting knob 13, a counter window 14, and a light guide 15 for strobe charging completion display are provided on the upper surface of the unit body 3.

In the film unit 2 with a lens,
It is possible to perform normal shooting in which shooting can be performed at a subject distance in a range of 1 m to infinity and close-up shooting in which shooting can be performed in a range of 0.4 to 1 m. Switching between normal shooting and close-up shooting can be performed by a slide operation of a shooting distance switching lever 11 provided on the front surface of the unit body 3.

When performing normal photographing, the photographing lens 6 is set by moving the photographing distance switching lever 11 to the left side in the figure.
Is held in the normal shooting position. Also, at the time of close-up shooting,
The photographing distance switching lever 11 is slid to the right in the figure to move the photographing lens 6 to the close-up photographing position. At the time of close-up shooting, a target mark for parallax correction and a light-shielding plate are inserted into the front of the objective finder window 7 and the strobe light emission window 8 together with the sliding operation of the shooting distance switching lever 11. When the photographer himself becomes the subject image during close-up photography, a mirror 10 that projects the photographing range is used.

The close-up adapter 20 includes an adapter body 21
And a rubber cord 22 for fixing the adapter body 21 to the front of the lens-fitted film unit 2. The adapter main body 21 is formed of a translucent synthetic resin made of, for example, polypropylene mixed with light diffusing fine particles, and the outer peripheral surface and the inner peripheral surface of the adapter main body are blasted. This adapter body 21 includes
A covering portion 23 formed so as to surround the strobe light emission window 8 is provided.

The adapter body 21 includes a close-up lens 27, a parallax correction lens 28,
9 is attached. As shown in FIG. 2, the close-up lens 27 is held by the light shielding tube 30. This shading tube 3
Reference numeral 0 denotes an outer cylinder member 31 and an inner cylinder member 32, which are molded from a light-shielding colored plastic member.
The outer cylinder member 31 is fixed to the adapter body 21, and the close-up lens 27 is attached from the front of the outer cylinder member 31, and then the inner cylinder member 32 is attached, so that the close-up lens 27 is It is held at a predetermined position.

When the close-up adapter 20 is mounted on the lens-fitted film unit 2, the end face of the light-shielding tube 30 comes into contact with the unit body 3. Thereby, at the time of the super close-up shooting, the light diffusely reflected inside the adapter body 20 and propagated toward the close-up lens 27 and the light emitted from the adapter body 20 and propagated toward the close-up lens 27 and the photographing lens 6 are reflected. Since light is shielded, flare can be prevented.

The close-up lens 27 is used to change the focus setting position to a position closer to the subject than the subject distance during close-up shooting. One close-up lens or a single convex lens is used so that the focal length becomes about 150 mm. Used in combination. When the close-up adapter 20 is attached to the lens-fitted film unit 2, the camera is in focus at a position where the subject distance is 0.1 to 0.2 m, and a photograph of approximately the same magnification can be obtained by service printing.

As shown in FIG. 3, the parallax correcting lens 28 and the reflecting plate 29 are fixed at predetermined positions from the rear side of the adapter body 21. Parallax correction lens 2
Numeral 8 is provided for performing finder parallax correction at the time of ultra-close-up shooting, and allows the user to observe the shooting range at the time of ultra-close-up shooting by looking through an eyepiece side finder window (not shown).

The reflection plate 29 is arranged at the front of the strobe light emission window 8 at a predetermined angle with respect to the longitudinal direction of the lens-fitted film unit 2. The strobe light reflected by the reflection plate 29 is incident on the inside of the adapter main body 21 from an incident surface 33 provided on the adapter main body 21 and emits light near the close-up lens 27. In this embodiment,
Although the reflection plate 29 is used as the reflection surface, the inner wall surface of the covering portion 23 may be inclined, and the inclined portion may be subjected to processing such as aluminum vapor deposition.

The close-up adapter 20 is formed such that the width on the left side from the center of the close-up lens 27 is different from the width on the right side, and the width on the left side is wide. Thereby, the close-up lens 2 of the adapter body 21
Since the amount of emitted strobe light emitted from around 7 becomes equal, the strobe light emitted from close-up adapter 20 can be made uniform with respect to the subject image.

Next, the operation of the present embodiment will be described. At the time of super close-up shooting, the shooting distance switching lever 11 of the film unit with lens 2 is slid to the normal shooting side (left side in the figure). Thereafter, as shown in FIG.
Is attached to the front of the film unit 2 with a lens.
Then, super close-up shooting is performed in this state.

At the time of flash photography, the flash light emitted from the flash emission window 8 is reflected by the reflector 29,
The light enters the adapter body 21. The strobe light that has entered the inside of the adapter main body 21 is diffusely reflected by fine particles having a light diffusing property, and thus emits light near the close-up lens 27. As a result, the subject image is illuminated with reduced light, so that the image taken during the super close-up shooting is a beautiful image with no overexposure. Further, the light-shielding cylinder 30 can prevent the occurrence of flare.

In the present embodiment, the adapter body is provided with a reflecting surface for reflecting strobe light and an incident surface for allowing the reflected light to enter the adapter body to emit light in the vicinity of the close-up lens. It may be attached to the main body. In this case, as shown in FIG. 5, the light guide member 36 formed of a transparent plastic material is connected to the adapter body 3.
Install inside 5. The light incident surface of the light guide member 36 is formed on the front surface of the strobe light emission window, and the light exit surfaces 37 and 38 are formed on both sides of the close-up lens 39. Thus, the strobe light emitted from the strobe light emission window propagates inside the light guide member 36, and its emission surface 37,
The light is irradiated from 38 toward the subject.

The shape of the light guide member is the same as that of the light guide member 3.
The light guide member 40 as shown in FIG. 6 is not limited to the shape of FIG. The light guide member 40 has four emission surfaces, and these emission surfaces face the emission windows 42 to 45 formed on the adapter body 41 from a transparent plastic material. Further, by setting the entrance surfaces of the exit windows 42 to 45 facing the respective exit surfaces of the light guide member 40 to be diffusion surfaces, it is possible to uniformly irradiate the strobe light toward the subject image.

In this embodiment, an example of a film unit with a lens capable of performing normal shooting and close-up shooting has been described.
It may be used for a normal film unit with a lens.

The photographing lens 6 of the lens-fitted film unit 2 is, for example, F10, and the depth of field is sufficiently deep even in super close-up photography with the close-up adapter of the present invention.
Focus is hard to come off by eye measurement. However, for example, in a scene where an affected part is imaged at a medical site, an image is taken at a distance very close to the patient, and the patient may feel pain such as oppression. An embodiment most suitable for such a case will be described with reference to FIG.

The close-up adapter 50 is a
At 0, two rod-shaped butting members 52 and 53 for keeping the distance to the subject constant are provided. This butting member 5
The bases 2 and 53 have their respective roots fixed to the front surface 51 a of the adapter body 51, and are attached to the front surface 51 a obliquely so that each of the distal ends spreads away from the close-up lens 27. Thus, the abutting members 52 and 53 are prevented from entering the shooting angle of view of the close-up lens 27.

Further, cushions 56 and 57 made of synthetic rubber or the like are attached to the respective tips of the abutting members 52 and 53 so as not to damage the subject. In addition, the cushions 56 and 57 are formed in a columnar shape in which the base sides of the abutting members 52 and 53 are thinner, but are not limited thereto, and may be, for example, spherical. In addition, cushion 5
The ends of the abutment members 52 and 53 may be rounded by omitting the parts 6 and 57. In addition, the butting members 52 and 53
By being molded from a shape memory alloy or a shape memory resin and made softer than, for example, an antenna of a mobile phone, there is no possibility of being broken or injured even if it is inserted into a pocket, and there is no possibility of damaging the inside of a patient's mouth.

An example of photographing a tooth using the close-up adapter 50 will be described. First, after attaching the close-up adapter 50 to the lens-fitted film unit 2 using the rubber cord 22, as shown in FIG.
The cushions 56 and 57 abut the mouth 63 of the patient 61, for example, against the posterior teeth and gums so as to face the teeth 62. Thus, the distance between the close-up lens 27 and the tooth 62 as the subject is kept substantially constant without looking through the finder of the lens-fitted film unit 2, and accurate focusing can be easily performed.

Since it is not necessary to look through the finder of the film unit 2 with the lens, as shown in FIG.
5 can take an image of the patient 61 only by the length of the arm, and can photograph the teeth 62 of the patient 61 sharply without giving the patient 61 any feeling of intimidation or the like. In this case, the photographer 65 moves the abutment member 5 from the side of the patient 61.
The shutter button may be pressed down while confirming that the teeth 2 and 53 are hitting the back teeth and the like of the patient 61. Since the flash light is emitted at a very high speed of about 1/5000 second, there is no possibility that camera shake will occur.

If a mark indicating the end of the lens with the depth of field, such as a red line, is attached to the abutment members 52, 53, it becomes easier to take a picture, and it becomes easier to take a picture.
Further, in the present embodiment, two rod-shaped abutting members are provided, but the present invention is not limited to this, and may be one, and for example, as shown in FIG. One hitting member 68 may be provided. The tip portion 68a of the abutting member 68 is formed in a concave shape so as to abut against, for example, the gum of a patient, and has a rounded corner. In addition,
The butting member 68 may be made of plastic, but is preferably made of an elastic material such as synthetic rubber.

Next, another embodiment will be described with reference to FIGS. The close-up adapter 70 is attached to the adapter body 7.
1 is formed of a light-transmitting plastic, and the object-side surface of the incident portion 71a facing the strobe light emission window 8 of the lens-fitted film unit 75 is inclined with respect to the longitudinal direction of the lens-fitted film unit 75. The inclined surface 76 is subjected to aluminum evaporation (indicated by hatching).

The close-up adapter 70 is provided on the front of the lens-fitted film unit 75 with three screws 7 instead of rubber strings.
It is fixed using 7-79. The adapter body 71
Are formed around the close-up lens 80, through which screws 77 to 79 are inserted, and screws 77 to 79 are provided at the front of the lens-fitted film unit 75.
Screw holes 84 to 86 are formed.

On the back surface 88 of the adapter body 71 (the surface on the side of the film unit with lens 75), arc-shaped concave portions 91 and 92 are formed on both sides of the close-up lens 80. The inner walls of the concave portions 91 and 92 are curved so that the center protrudes toward the subject, and minute concave portions 91a and 92a are formed on the entire surface of the inner wall.

The strobe light incident from the incident portion 71a is reflected by the inclined surface 76 on which aluminum is deposited, and reflected by the adapter body 71.
Of the adapter body 7 in the vicinity of the close-up lens 80 by being scattered at the concave portions 91a and 92a of the concave portions 91 and 92.
The object is irradiated from the front surface 93 toward the subject. The incident portion 71 is more than the concave portion 92 so that the irradiation light amount is equal left and right.
The concave portion 91 far from “a” is formed in a size larger than the concave portion 92.

The embodiment shown in FIG. 14 is a close-up adapter which can be used in various types of film units with lenses having different models. The amount of projection of the front projection, for example, the lens hood, of the film unit with lens differs depending on the model. As a result, when the close-up adapter is attached to the front of the film unit with the lens, the distance between the taking lens and the close-up lens varies,
Fluctuation occurs in the focusing range.

The close-up adapter 95 is provided with screws 98 and 99 on the adapter body 96 for changing the amount of projection to the lens-fitted film unit side.
The distance between the taking lens 7 and the close-up lens of the close-up adapter 95 can be adjusted to be always the same.

The close-up adapter 95 is attached to the front of the lens-fitted film unit 97 with the rubber cord 22 similarly to the close-up adapter 20, and the strobe light emitted from the strobe light emission window 8 is reflected by the reflector 29. And
The light enters the adapter body 96. The configuration and operation of the adapter body 96 are similar to those of the adapter body 21 of the close-up adapter 20.
The description is omitted here.

In each of the embodiments described above, the camera is mounted on a film unit with a lens. However, the present invention is not limited to this. For example, the camera can be mounted on a digital camera. As shown in FIG.
Reference numeral 10 incorporates a close-up lens 112 at the center of a donut-shaped adapter main body 111 made of transparent plastic having light guiding properties. Adapter body 111
The flashlight window 1 of the digital camera 115 is
A plate-shaped light guide 117 that protrudes the strobe light emitted from the light guide 16 and guides the light into the adapter main body 111 is formed to protrude.

In the upper and lower parts of the adapter body 111,
The hooks 118 and 119 are formed integrally, and the adapter body 111 is
Attach to the front of the. Note that the shape of the back surface (surface on the digital camera side) of the adapter body 111 and the light guide 117,
Depending on the shape of the hooks 118 and 119, the adapter body 11
When the camera 1 is mounted on the front part of the digital camera 115, the close-up lens 112 is positioned so as to face the taking lens 122 of the digital camera 115.

The adapter body 111 is preferably made of plastic mixed with a fluorescent substance in order to improve the light diffusivity. Further, similarly to the adapter body 21, for example, it may be molded from a translucent synthetic resin made of polypropylene mixed with light diffusing fine particles. Further, the back surface of the adapter body 111 may be roughened.

The above embodiment is an example in which the camera is mounted on a film unit with a lens or a digital camera. However, the present invention is not limited to this, and a camera having a built-in flash device and a fixed photographing lens, for example, a compact camera Etc. can also be attached. Further, the above-described embodiment is for super close-up photography for photographing the inside of the mouth, for example. However, two lenses having different focal lengths can be slid or turret so that the periphery of the mouth and the entire face can be photographed. It may be provided so as to be selectively switched.

In the above embodiment, super close-up photographing can be performed by attaching a close-up adapter. For example, as described in Japanese Patent Application Laid-Open No. 11-38480, the adapter body is moved between an open position and a closed position. When the adapter body is moved to the open position, normal shooting and close-up shooting may be performed.

[0043]

As described above, according to the close-up adapter of the present invention, since the strobe light is emitted from the vicinity of the close-up lens of the adapter body and irradiates the subject, color unevenness can be obtained even in super close-up shooting. It is possible to photograph a beautiful image without any trouble, and to obtain an image photographed almost in full size even with a service print. Also, by providing the abutment member at the front of the adapter body, it is possible to perform super close-up photography without looking through the viewfinder. For this reason, for example, when taking a super close-up photograph of the affected area,
Since it is not necessary to bring the face close to the patient, there is no pain such as a feeling of oppression to the patient.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a close-up adapter and a film unit with a lens embodying the present invention.

FIG. 2 is a cross-sectional view showing a configuration near a light shielding cylinder.

FIG. 3 is a perspective view showing the appearance of the back of the close-up adapter.

FIG. 4 is a perspective view showing an appearance of a film unit with a lens to which a close-up adapter is mounted.

FIG. 5 is an explanatory view showing an embodiment in which a light guide member is attached to an adapter body.

FIG. 6 is an explanatory diagram showing an embodiment using another light guide member.

FIG. 7 is an explanatory view showing an embodiment provided with a butting member.

FIG. 8 is an explanatory view showing a use state of the embodiment shown in FIG. 7 from a side of a patient.

FIG. 9 is an explanatory diagram showing a use state of the embodiment shown in FIG. 7 from the front side of the patient.

FIG. 10 is an explanatory view showing an embodiment in which another abutting member is provided.

FIG. 11 is a perspective view showing an embodiment in which the entire adapter body is formed from a light-guiding material.

FIG. 12 is a front view of the embodiment shown in FIG. 11;

FIG. 13 is an explanatory diagram showing an internal structure of the embodiment shown in FIG. 11;

FIG. 14 is an explanatory diagram showing, from above, an embodiment in which the mounting interval with the film unit with a lens can be adjusted.

FIG. 15 is a perspective view showing an embodiment for a digital camera.

[Explanation of symbols]

 2, 75, 97 Film unit with lens 8, 116 Strobe light emission window 20, 50, 70, 95, 110 Close-up adapter 23 Covering part 27, 80, 112 Close-up lens 28 Parallax correction lens 29 Reflector 30 Light shield cylinder 36, 40 light guide member 52,53,68 abutment member 91,92 recess 115 digital camera

Claims (8)

[Claims] An adapter body detachably attached to the front of a camera or a film unit with a lens, in which a strobe light emission window and a photographing lens are incorporated, and a front surface of the photographing lens when attached to the camera or the film unit with a lens. In a close-up adapter having a close-up lens positioned, at least a part of the adapter main body is molded from a plastic material having optical transparency, and the adapter main body closes up strobe light from a strobe light emission window. A close-up adapter, wherein light guide means for guiding light through the inside of the adapter main body toward the lens is provided, and light emitted from the vicinity of a close-up lens of the adapter main body is irradiated to a subject. 2. The light guide means according to claim 1, wherein said light guide means comprises a reflector attached to said adapter body.
The close-up adapter described. 3. A concave portion is formed on a surface of the adapter main body near the close-up lens and opposite to the subject, a back wall of the concave portion is curved so as to protrude toward the subject, and a number of irregularities are formed on the back wall. The close-up adapter according to claim 1 or 2, wherein: 4. The concave portion is provided in a pair with the close-up lens interposed therebetween, and when the adapter body is mounted on a camera or a film unit with a lens, the concave portion farther from the strobe light emission window is smaller than the concave portion closer thereto. 4. The close-up adapter according to claim 3, wherein the size is increased. 5. An adapter body detachably attached to a front surface of a camera or a film unit with a lens in which a strobe light emission window and a photographing lens are incorporated, and a front surface of the photographing lens when attached to the camera or the film unit with a lens. In a close-up adapter having a close-up lens positioned, a light guide member molded from a transparent plastic material is provided in the adapter body, and the light guide member is set at a position facing the stroboscopic light emission window at an incident surface of the light guide member. A close-up adapter whose surface is provided near a close-up lens. 6. The close-up adapter according to claim 1, wherein light emitted from the vicinity of the close-up lens is made substantially uniform around the close-up lens. 7. A flare-preventing light-shielding tube made of a light-shielding plastic material is provided in the adapter body, the close-up lens is disposed inside the light-shielding tube, and a rear end surface of the light-shielding tube is attached to a camera or a camera. The film unit with a lens extends to the front side.
6. The close-up adapter according to any one of 6. 8. An abutment member provided at a front portion of the adapter main body to keep a distance from a close-up lens to an object constant by abutting the object near or on a part of the object. 8. The close-up photography adapter according to any one of 1 to 7.