JP4174280B2 - camera - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a camera, and more particularly to a method for allowing a subject and a photographer to identify a multiple exposure night view mode.
[0002]
[Prior art]
As a prior art of a camera having a multiple exposure night view mode, Japanese Patent No. 300008190 discloses a target subject located at a long distance and another target subject located at a short distance with the long-distance target subject as a background. It is possible to shoot according to an appropriate focusing amount and an appropriate exposure value, and it is possible to perform a new multiple exposure shooting that can perform these two types of shooting operations simply, appropriately and quickly by a single shutter release operation. A camera is disclosed. According to this, when configuring a camera capable of multiple exposure shooting, a long-distance shooting mode suitable for shooting a target object located at a long distance corresponds to infinity or a long distance that falls within the depth of field. Set as a mode that can execute the shooting sequence to shoot according to the set amount of focus and the appropriate exposure value using natural light calculated based on the luminance information of the peripheral area of the shooting field, and close to the distance A short-distance photographing mode suitable for photographing another target subject located is determined by focusing amount based on distance measurement information on the other target subject located in the central region of the photographing visual field and luminance of the central region of the photographing visual field. Execute a shooting sequence to shoot according to the appropriate exposure value using flashlight calculated by the exposure calculation method based on information and strobe unit guide number The mode execution operation related to the short-distance shooting mode is continued substantially simultaneously with the end of the mode execution operation related to the long-distance shooting mode for the same photosensitive screen for each shutter release operation. In addition, it is configured to be set as a composite photographing mode that can execute a multiple exposure photographing sequence that is performed automatically and automatically, and the above object is completely achieved.
As another conventional technique, Japanese Patent Laid-Open No. 10-39365 discloses a technique for clearly notifying the photographer or the main subject of the end of exposure when the self-timer is set in the night view portrait mode. ing. According to this, in a camera having a shooting mode setting means and a self-timer setting means, which can be set to the night view portrait mode, the lamp lighting control means and the shooting mode setting means set the night view portrait mode, and the self-timer When the self-timer is set by the setting means, the exposure end notification means for lighting the lamp for a predetermined time is provided by the lamp lighting control means at the time of completion of exposure.
[0003]
Japanese Laid-Open Patent Application No. 8-122844 discloses a camera that can capture a low luminance background such as a night scene and a person at the same time. According to this, there is provided a camera having shooting control means capable of selecting at least a first shooting mode and a second shooting mode, and shooting notice means for making a notice of shooting, wherein the first shooting mode is selected. In this case, shooting is started after the operation of the shooting notice unit is completed, and when the second shooting mode is selected, shooting is started during the operation of the shooting notice unit.
Further, in Japanese Patent Laid-Open No. 2001-109054, when the silencer is functioning effectively, even if the shutter speed is long, such as night scene shooting, the camera is moved even though the shutter is open. A camera capable of warning a blurred photograph is disclosed.
[Patent Document 1]
Japanese Patent No. 3008190 [Patent Document 2]
Japanese Patent Laid-Open No. 10-39365 [Patent Document 3]
JP-A-8-122844 [Patent Document 4]
Japanese Patent Laid-Open No. 2001-109054
[Problems to be solved by the invention]
As in Patent Document 1, a “multiple shooting night scene mode” in which far and near scenes are shot with a single operation has been known. In the multiple night view mode, it is possible to capture a state in which both the distant view and the close view are in focus on one screen with a simple operation, and therefore, special effects that cannot be obtained by ordinary night view photography can be expected. However, in the multiple night view mode, an exposure time of about 2 seconds is required for long-distance shooting, and if the photometry, distance measurement, lens operation during close-up shooting, etc. are included, 3 from the photographer's release operation to the end of shooting. It will take about a second. This shooting time varies depending on the film sensitivity and lens F value. However, the above time is a typical compact camera with a built-in strobe, and a film of ISO 100 to 400 is used, and the lens F value is about F4 to 5.6. Assume the case.
As described above, in the multiple shooting night view mode, since it takes time to shoot compared with normal shooting, the following problems occur.
1) Since the subject photographed by the second exposure does not necessarily understand the operation of the camera, the subject moves thinking that the photographing has not yet been performed even if the first exposure is started. .
2) When the person who is the subject moves during the first exposure, the neon sign of the distant view that has already been photographed in the place where only the person should be photographed overlaps with the person during the second exposure for strobe shooting. It will be exposed.
3) As a result, the person becomes unclear or the background is visible through the person.
4) Since it is predicted in advance that a long time will be reached, the photographer prevents camera shake by setting the camera on a tripod or a fixed object. Because it is difficult, I accidentally move the camera while shooting. 5) This results in a so-called failure photo such as blurring in the first exposure or no person to be photographed in the second exposure.
[0005]
Japanese Patent Laid-Open No. 2004-259561 reports that when a long time is taken in night scene shooting, the lamp is turned on at the end of exposure to notify the subject, but the end of shooting can be recognized, but it is not known that shooting is in progress.
In Patent Document 3, when multiple exposure is performed in the self mode, shooting is started while the shooting notice is displayed. However, since the self-mode and the multiple exposure mode are limited, lighting / flashing of the self lamp is not recommended. Is generally recognized and may not be recognized during shooting.
Patent Document 4 issues a warning by using sound and light separately for shooting at a long time, but the provision of a sounding member leads to an increase in cost, and the warning by a low-luminance warning LED or the like is an original warning. Since it is necessary to discriminate between them, the low-luminance warning LED is on the eyepiece side, so there is a problem that it is not known if it is on the front side (subject side) of the camera.
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a camera in which a subject and a photographer can be easily identified by utilizing a micro light emission of a strobe in a multiple exposure night view mode.
[0006]
[Means for Solving the Problems]
In order to solve such a problem, the present invention provides a main light emission for properly exposing a target subject and a flash light emitting means capable of a notification light emission by a small amount of light emission, and focuses on a distant view distance. first exposure operation for photographing Te, photographing performed on the same screen in a second exposure operation for shooting in this emission, a single release operation by said flash light emitting means with focus on foreground length a camera having a multiple exposure night view mode for the multiple when the exposure night view mode is set, focusing on distant distances starting the first exposure operation, the predetermined time has passed the first After the exposure operation is stopped and the notification light emission by the flash light emitting means is performed, the first exposure operation is restarted a predetermined number of times, and after the first exposure operation is finished, the foreground distance is focused. Above And wherein the initiating the second exposure operation by the light emitting.
According to a second aspect of the present invention, in the camera according to the first aspect, the notification light emission is performed immediately before the start of the first exposure operation and immediately after the end of the first exposure operation. It is characterized by.
Further, according to claim 3 is the camera according to claim 1 or 2, when the photographing distance of the second exposure operation is closer than a predetermined value, to increase the reduction or repetition period of the light intensity of the notification light emitting It is characterized by that.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .
FIG. 1 is a circuit configuration diagram of a camera (photographing apparatus) according to an embodiment of the present invention. The camera 20 takes a picture by exposing a film set therein, and as shown in FIG. 1, a CPU 9 for controlling the entire camera, a motor 1 for film conveyance, and the motor 1 A film feeding circuit 5 for driving the zoom lens, a motor 2 for adjusting the focal length of a zoom lens (not shown), a zoom driving circuit 6 for driving the motor 2 to change the photographing magnification, and a motor 3 for focusing. A focus driving circuit 7 for driving the motor 3 for focusing, a motor 4 for opening / closing the shutter, a shutter driving circuit 8 for driving the motor 4 to open / close the shutter, and a xenon tube for emitting strobe light. 15, a strobe circuit 14 that emits strobe light to the xenon tube 15, and a subject located in the central area of the field of view. A distance measuring circuit 13 for measuring the distance, a light measuring circuit 12 for measuring the amount of light passing through the photographing lens, a display means 11 for reproducing and displaying the monitor image of the subject and the image in the memory, and for instructing the start of photographing. And an operation SW 10 having a release switch, a shooting magnification setting switch, a plurality of switches for setting various modes (both not shown), and the like.
[0011]
The operation in the above configuration will be described. The CPU 9 monitors changes in the state of various switches constituting the operation unit SW10, and executes control according to the switch in which the state has changed and the content of the change. Thus, various modes are set and canceled, the shooting magnification is set with driving the motor 2 to the zoom drive circuit 6, and shooting is performed according to the mode being set. The photographing is performed by opening and closing the shutter by driving the motor 4 in the shutter driving circuit 8 when the operation to the release switch is detected. In addition to this, there is a need for focusing by driving the motor 3 to the focus driving circuit 7 according to the distance to the subject measured by the distance measuring circuit 13, and the necessity of emitting strobe light from the light quantity measured by the light measuring circuit 12. Judgment is also made. In a situation where it is determined that it is necessary to emit strobe light, the strobe circuit 14 is caused to emit the xenon tube 15 at the time of shooting. After shooting, the film feeding circuit 5 drives the motor 1 to feed the film.
[0012]
FIG. 2 is a diagram illustrating a shutter sequence in a general multiple exposure night view mode. This depends on the brightness of the subject, the lens F value, and the film sensitivity. In the multiple exposure night view mode, after the shutter is opened for a maximum of about 2 seconds in the first exposure operation 30, the second exposure operation with the strobe light emission 34 is performed. 31 is set to be performed. In the example of FIG. 2, since the focus position of the first exposure operation 30 is set in advance to a position suitable for distant view shooting, the focus operation is not performed before the first exposure operation. In this way, in the multiple exposure night view mode, the first exposure operation 30 is first performed for about 2 seconds, the focus is moved to the position where the second exposure operation is performed (near direction 32), and then the second exposure with strobe shooting is performed. Operation 31 is performed. Therefore, except for the fact that the strobe 34 emits light in the second exposure operation 31, it recognizes that the first exposure operation 30 has been started for a subject located many meters away to be photographed. It is difficult to do.
Therefore, in the present invention, by notifying that shooting is being performed by strobe light emission from the start of the first exposure operation, both the subject and the photographer can easily recognize that shooting is being performed for a long time. To do. FIG. 3 is a diagram illustrating a shutter sequence in the multiple exposure night view mode according to the first embodiment of the present invention. The same reference numerals are assigned to the same components, and duplicate descriptions are omitted. In the present embodiment, the notification light emission 35 is started immediately before the start of the first exposure operation 30, the notification light emission 36 and 37 are performed a total of five times at regular intervals, and the main light emission 34 is performed in the second exposure operation 31. is there. It should be noted that the exposure is performed by the notification irradiation 36 during the first exposure operation 30. Since the first exposure operation 30 is taken in a state where the focus is set to the distant view, the subject in the foreground is in a state of out-of-focus and may be taken many times due to multiple notification irradiations. Sexuality occurs.
[0013]
In recent years, however, IGBTs (Insulated Gate Bipolar Transistors) have been miniaturized as current control elements for strobe light emission and can be mounted on compact cameras with built-in strobe light. Emission control of about 1 is easy. On the other hand, a color negative film with the widest latitude is exposed to about ± 4 Ev with respect to an appropriate amount of light. For example, when an ISO 100 film is used, the appropriate GNo. When the lens brightness: F is F4.0 and the subject distance: L is 3 m. Is obtained by the following formula.
(Appropriate GNo.) = F × L = 4 × 3 = 12 (1)
At this time, the appropriate GNo. To a predetermined number of exposure steps: GNo. Ask for. The limit GNo. Is -4 Ev, which is the under limit of the film latitude. Is obtained by the following formula.
(Limit GNo.) = (Appropriate GNo.) × 2 ^{(ΔEv / 2)} = 12 × 2 ^(−4/2) = 3 (2)
That is, in the above shooting scene, the GNo. This means that a subject to be photographed in the second exposure will not appear even if the flash is emitted with a light emission amount of about 3. However, the GNo. 3 is the total amount of notification light emission emitted during the first exposure. That is, in the control example of FIG. 3, among the five notification irradiations, the total of the three exposure doses 36 emitted during the first exposure is the GNo. It is to make it within 3. As is clear from the above example, GNo. If the control of about 1 can be performed, performing the notification irradiation during the first exposure operation 30 is a realistic imaging method. However, in FIG. 3, consideration is given so that the subject to be photographed in the second exposure operation 31 is not photographed on the film during the first exposure operation 30, but the exposure gradually increases as the subject becomes closer. It will be.
[0014]
Therefore, as a second embodiment, the amount of notification light emission can be reduced when the distance of the subject approaches, thereby preventing the subject from being exposed to the film during the first exposure operation. A method for reducing the amount of light can be achieved by shortening the light emission ON control time by using an IGBT or the like. Further, since the subject distance is approaching, even if the light emission amount is reduced, it can be recognized without any problem. However, in the second embodiment, the subject light emission time is shortened to prevent the subject from being imprinted. However, if the subject is extremely close or a high-sensitivity film such as ISO800 or ISO1600 is used, exposure is inevitably performed. May not be able to be prevented. Therefore, if the light emission time is extremely shortened by controlling the IGBT, non-light emission, variation in the amount of emitted light, and the like occur. This can be solved by reducing the current at the start of light emission using a coil, etc., but if there is a size limitation like a compact camera, it is not a practical method and the cost increases. End up.
Therefore, in the present invention, by configuring so as to reduce the period of notification light emission, the number of notification light emission during the first exposure is reduced to prevent the subject from being imprinted.
[0015]
FIG. 4 is a diagram illustrating a shutter sequence in the multiple exposure night view mode according to the third embodiment of the present invention. The same reference numerals are assigned to the same components, and duplicate descriptions are omitted. In the present embodiment, the notification light emission 35 is started immediately before the start of the first exposure operation 30, the notification light emission 38 is performed three times in total at regular intervals, and the main light emission 34 is performed in the second exposure operation 31.
FIG. 5 is a diagram illustrating another example of the shutter sequence in the multiple exposure night view mode according to the third embodiment of the present invention. The same reference numerals are assigned to the same components, and duplicate descriptions are omitted. In this embodiment, the notification light emission 35 is started immediately before the start of the first exposure operation 30, the notification light emission 39 is performed twice in total at regular intervals, and the main light emission 34 is performed in the second exposure operation 31. In this way, exposure can be more effectively prevented by combining the above-described FIGS.
FIG. 6 is a diagram illustrating a shutter sequence in the multiple exposure night view mode according to the fourth embodiment of the present invention. The same reference numerals are assigned to the same components, and duplicate descriptions are omitted. In the present embodiment, the notification light emission 35 is started immediately before the start of the first exposure operation 30, the notification irradiation 40 is repeated twice after the end of the first exposure operation 30, and the main light emission 34 is performed in the second exposure operation 31. Is to do. Thus, since the notification light emission is performed before and after the first exposure operation 30, it is possible to completely prevent the subject from being captured during the shooting of the distant view, and the fact that the shooting has started and the second exposure operation. It is possible to recognize that 31 starts. That is, the subject can recognize that shooting has started with the first notification light emission 35 and can recognize that flash photography will be performed with the next notification light emission 40. As described above, since the time for driving the focus for the second exposure operation 31 is also effectively utilized, there is no problem that the photographing time becomes long.
[0016]
FIG. 7 is a diagram showing a shutter sequence in the multiple exposure night view mode according to the fifth embodiment of the present invention. The same reference numerals are assigned to the same components, and duplicate descriptions are omitted. In the present embodiment, the notification light emission 35 is started immediately before the start of the first exposure operation 30, the notification irradiation 41 is started when the first exposure operation 30 a is completed, and the first exposure operation 30 b is started when the notification exposure 41 is completed. When the exposure is completed for a predetermined time, the notification irradiation 42 is started. When the exposure ends, the first exposure operation 30c is started. When the exposure is completed for a predetermined time, the notification irradiation 43 is started. Then, the main light emission 34 is performed in the second exposure operation 31. As described above, when the strobe notification light emission is performed during the first exposure operations 30a to 30c, the first exposure operation is stopped and then restarted, so that the subject is reflected during the shooting of the distant view. It can be completely prevented, and it is possible to recognize that shooting has started and that the second exposure operation 31 has started. Here, when the exposure operation is stopped and restarted, the actual exposure time will decrease. However, in the case of a lens shutter type compact camera, the time for opening the shutter → closing → opening is about several tens of msec. The total shooting time does not increase significantly. Although the present invention has an advantage that the repetition of the notification light emission is easier to understand than in FIG. 6, depending on the configuration of the camera, the shutter may not be opened and closed many times during one shooting sequence. This embodiment needs to be used for each camera.
6 and 7, since it is configured to completely prevent the subject from being captured during the shooting of a distant view, the amount of notification light emission is reduced during the first exposure as shown in FIGS. Or changing the repetition period. However, strobe light emission in a dark place such as night scene photography is dazzling for the subject, so the camera of FIGS. 6 and 7 can also reduce the amount of notification light emission during the first exposure or change the repetition cycle. It is possible to reduce glare. About the method to change, as described in FIGS. 3-5, if it comprises, it can reduce glare more effectively.
[0017]
[0018]
FIG. 8 is a diagram showing a sequence of a general distance measuring operation. The same reference numerals are assigned to the same components, and duplicate descriptions are omitted. In night scene shooting, the subject brightness is often low, so a camera with a so-called passive AF mechanism that measures the shooting distance by forming an image of the subject measures the distance once to obtain (51) distance measurement information. If not, the light emission 50 may be performed again using a strobe or the like as an auxiliary light source and the distance measurement 52 may be performed again. Once distance measurement is performed and distance measurement is performed again with an auxiliary light source, there is a problem in that the time for night scene shooting in a long second is further increased. FIG. 9 is a diagram showing a shutter sequence in the multiple exposure night view mode according to the sixth embodiment of the present invention. The same reference numerals are assigned to the same components, and duplicate descriptions are omitted. In the present embodiment, when the information is not obtained by the first ranging operation 53, the notification light emission 36 is used as the auxiliary light source for the ranging operation 54, so that both the subject and the photographer have a long time. It is possible to easily recognize that the current shooting is being performed, and it is possible to repeatedly perform the distance measuring operation with the auxiliary light source without increasing the shooting time. In this example, the distance measuring operation 54 is performed only once, but may be performed any number of times at the timing of the notification light emission.
Here, the amount of notification light emission that can be emitted during the first exposure is determined by the subject distance as described above. However, when the subject information to be photographed in the second exposure operation is not obtained as shown in FIG. 9, the optimum notification light emission amount cannot be obtained. In the inventions shown in FIGS. 3 to 7, since the subject may be exposed during the first exposure, the notification light emission must be performed in anticipation that the subject is close to some extent. In this case, the amount of notification light emission may be insufficient for the distance measuring operation due to problems such as the fact that the subject is far away from the subject and the contrast and reflectance are low. Therefore, the notification light emission during the first exposure reduces the light amount, and the notification light emission after the first exposure ends increases the light amount, so that the subject is exposed during the first exposure even if the subject distance is unknown. Can be prevented, and after the first exposure is completed, the distance measurement accuracy can be improved by increasing the amount of notification irradiation.
[0019]
【The invention's effect】
As described above , according to the present invention, when strobe notification light emission is performed during the first exposure, the first exposure operation is stopped and then restarted, so that images other than a distant view can be captured during the first exposure. It is possible to completely prevent both the subject and the photographer.
Further, according to the present invention, the amount of notification light emission is reduced or the repetition cycle is delayed depending on the distance of the subject, so that images other than a distant view are completely prevented during the first exposure, and both the subject and the photographer are photographing. Can be easily identified, and the glare of the notification light emission that the subject visually recognizes can be reduced.
[Brief description of the drawings]
FIG. 1 is a circuit configuration diagram of a camera (photographing apparatus) according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a shutter sequence in a general multiple exposure night view mode.
FIG. 3 is a diagram illustrating a shutter sequence in a multiple exposure night view mode according to a second embodiment of the present invention.
FIG. 4 is a diagram illustrating a shutter sequence in a multiple exposure night view mode according to a third embodiment of the present invention.
FIG. 5 is a diagram illustrating another example of the shutter sequence in the multiple exposure night view mode according to the third embodiment of the present invention.
FIG. 6 is a diagram illustrating a shutter sequence in a multiple exposure night view mode according to a fourth embodiment of the present invention.
FIG. 7 is a diagram illustrating a shutter sequence in a multiple exposure night view mode according to a fifth embodiment of the present invention.
FIG. 8 is a diagram showing a sequence of a general distance measuring operation according to the present invention.
FIG. 9 is a diagram illustrating a shutter sequence in a multiple exposure night view mode according to a sixth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Motor for film conveyance, 2 Motor for adjusting focal length, 3 Motor for focusing, 4 Motor for shutter opening / closing, 5 Film feed circuit, 6 Zoom drive circuit, 7 Focus drive circuit, 8 Shutter drive circuit , 9 CPU, 10 operation SW, 11 display means, 12 photometric circuit, 13 distance measuring circuit, 14 strobe circuit, 15 xenon tube

Claims (3)

Equipped with a main flash that makes the target subject properly exposed, and a flashlight that can emit notification light with a small amount of light,
A first exposure operation that performs shooting with a focus on a distant view distance and a second exposure operation that performs shooting with a main flash by the flash light emitting means while focusing on a distant view distance with a single release operation. A camera having a multiple exposure night view mode for shooting on the same screen,
When the multiple exposure night view mode is set,
The first exposure operation is started by focusing on a distant view distance, and after the predetermined time has elapsed, the first exposure operation is stopped and the first light emission operation is performed by the flash light emitting means, and then the first exposure operation is performed. The camera is characterized in that resuming is repeated a predetermined number of times, and after the first exposure operation is finished, the second exposure operation by the main light emission is started focusing on the near distance . The camera of claim 1,
The camera that performs the notification light emission immediately before the start of the first exposure operation and immediately after the first exposure operation ends and immediately before the start of the second exposure operation. The camera according to claim 1 or 2 ,
Wherein when the photographing distance to the second exposure operation is closer than a predetermined value, the camera, characterized in that the longer reducing or repetition period of the light intensity of the notification light.

Images