JP3709673B2 - Camera data recording device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data recording device for a camera, and more particularly, to a data recording time changing device configured to change a data recording time for recording various shooting information data including time data at the time of shooting in a camera equipped with a light emitting device. The present invention relates to a data recording apparatus.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a camera that is an imaging device that records a subject image is known which includes a data recording device that records some data (shooting information) related to the recording and the subject image. For example, in a camera accessory called a data back, date and time (time) information data such as date and time at the time of shooting, and shooting information such as an exposure value at the time of shooting can be recorded on or near the subject image. In this way, it is convenient for organizing negatives and printed photographs developed after shooting.
[0003]
Further, as a camera accessory used for a camera or the like, a light emitting device called a speedlight or a strobe is conventionally known. This light emitting device is detachably attached to or built in the camera body, and emits light to illuminate a subject by turning on a switch that is linked to the operation of a shutter mechanism associated with the release operation of the camera. It is often used during night photography when there is little light from the subject.
[0004]
As for the light emission timing of such a light emitting device, a normal sync mode (so-called front curtain sync mode) in which the switch is turned on immediately after the shutter is fully opened, and a predetermined time before the shutter closing operation of the shutter mechanism are switched on. It is roughly divided into a rear sync mode (so-called rear curtain sync mode) that is turned on.
[0005]
In normal flash photography, since the subject is irradiated with light from the light emitting device (strobe) by setting the normal sync mode, generally a good photograph can be obtained even in an environment where the amount of light is insufficient.
However, when taking a strobe shot of a moving subject, if the strobe shot is performed in the normal sync mode described above, the light is emitted at an extremely early stage within the time when the shutter is open. In general, an unnatural photograph is obtained in which an afterimage of light appears only in the front portion in the movement direction of the subject image.
[0006]
On the other hand, when flash photography is performed under the same conditions in the rear synchro mode, light is emitted at a very late stage within the time when the shutter is open. It becomes a very natural photograph as a moving body photograph in which an afterimage of a subject image is reflected in a part.
However, such a rear sync mode is not versatile, and when the shutter speed is relatively long, a time difference between the release operation timing and the light emission timing of the light emitting device causes a so-called time lag. In some cases, a clear subject image cannot be obtained.
[0007]
Therefore, at the time of performing flash photography, a camera that can switch and set both of the above-described synchro modes according to the photographing situation is now common.
[0008]
[Problems to be solved by the invention]
However, in a conventional camera having a data recording device as described above and a strobe device capable of setting two types of sync modes, these devices are usually set without any relation. In other words, in the conventional camera, the data recording timing is normally set regardless of the timing of the on operation of the strobe flash sync switch.
[0009]
For example, in the case of a low-sensitivity film, the data recording time by imprinting by a data recording device requires a relatively long time corresponding to the sensitivity. In order to prevent such a long data recording time from delaying the start of film feeding operation after shooting, the data recording timing by imprinting is generally set as early as possible and is usually set almost simultaneously with the release operation timing. Is.
[0010]
For this reason, when the strobe device is in the normal sync mode, the difference between the strobe emission timing and the data recording timing due to the imprinting is almost only the time lag at the time of the release operation. There is no significant difference between the time and the timing of data recording, and there is no problem at all even if date and time (time) information recording is included in the contents of the data recording.
In other words, conventionally, the same date and time (time) information is recorded as recorded data regardless of whether the sync mode is the normal mode or the rear mode.
[0011]
However, when the strobe device is in the rear sync mode, especially in the case of long exposure, if data recording is performed at the release operation timing, the strobe light is emitted immediately before the end of the predetermined long exposure, so the subject is recorded by the light emission Therefore, there is a difference in the timing of data recording by the amount of time associated with the long exposure. This means that when date / time (time) information is recorded, there is a discrepancy between the subject recording time and the data recording time due to flash emission on the photograph, which is inconvenient in the following cases. It is.
[0012]
In other words, the situation of the subject on the photograph and the time of data recording are required to be exactly the same. For example, photographs and evidence photographs used for academic purposes, as well as moving objects are taken. In the case of a photograph or the like, it is required that the data recording time described above substantially coincides with the subject on the photograph.
[0013]
According to the conventional data recording by imprinting, the flash firing time and imprinting time are different, especially when setting the rear synchro mode. It is hoped that some measures will be taken.
[0014]
Furthermore, the problem in recording data of such date / time (time) information at the time of shooting is that a still camera using a 35 mm film provided with a data recording device for performing data recording by optical copying described above. Not limited to this, an APS still camera using a new system film called APS (Advanced Photo System) is equipped with a camera that records information magnetically on a magnetic recording section on a 24 mm film, and an electrical information recording medium. Even in an electronic still camera that performs electrical information recording, if the date and time (time) information data to be recorded is the same in the normal sync mode and the rear sync mode, this is also a problem. It is also desirable to consider.
[0015]
The present invention has been made in view of such circumstances. Regardless of whether the strobe light emission is in the normal sync mode or the rear sync mode, the recording time of the subject image and the recording time at which data is recorded are recorded. It is an object of the present invention to obtain a camera data recording apparatus that can substantially match the two.
[0016]
[Means for Solving the Problems]
In order to meet such a purpose, the data recording device of the camera according to the present invention is a camera capable of recording information on a recording medium, and includes command means for outputting a light emission command for causing the light emitting device to emit light, A shutter mechanism that maintains an open state for a predetermined time, a normal sync mode in which the command means is activated at a first timing after the shutter opening operation of the shutter mechanism, and before the shutter closing operation of the shutter mechanism. Mode setting means for switching and setting a rear sync mode that activates the command means at a second timing different from the first timing; first time information according to the first timing; and the second timing Clocking means for timing and outputting second time information corresponding to the first time information in the normal sync mode. And wherein the rear synchro mode is obtained and a data recording means for recording the second time information on the recording medium.
[0017]
In the camera data recording apparatus according to the present invention, the data recording unit is configured such that the timing for recording the first time information is different from the timing for recording the second time information. is there.
Further, the camera data recording apparatus according to the present invention can change the recording time of the data recording means in accordance with the type of the data recording medium, and the data recording timing by the data recording means can be set in the normal sync mode by the command. It is set at the time of sending the light emission command of the means, and in the rear sync mode, it is set to be earlier by the time depending on the recording time of the data recording means than at the time of sending the command signal of the command means. Here, the type information of the data recording medium is sensitivity information of a photographic film, for example.
[0018]
In addition, the data recording device of the camera according to the present invention has storage means for storing the first time information and the second time information, and the information stored in the storage means is recorded by the data recording means. It is configured to be recorded on a medium.
[0019]
Furthermore, the data recording device of the camera according to the present invention uses a magnetic recording medium provided on a photographic film as the recording medium, and magnetically records the time information on the magnetic recording medium by the data recording means. It is configured.
Also, the camera data recording apparatus according to the present invention is configured such that an electrically recordable medium is used as the recording medium, and the time information is electrically recorded on the recording medium by the data recording means. Is.
[0020]
According to the present invention, depending on whether the setting by the mode setting means is the normal sync mode or the rear sync mode, the data recording information is made different by changing the timing of data recording by the data recording means. The recording time of the subject image by the light emission of the light emitting device and the recording time of the data recording can be made substantially the same in both the normal sync mode and the rear sync mode.
[0021]
Furthermore, according to the present invention, it is necessary to unnecessarily delay the start timing of film feeding after photographing even when the rear sync mode is set and the data recording time due to imprinting becomes long. There is no.
[0022]
A camera equipped with a data recording device is a still camera using a 35 mm film, a camera using a new type of 24 mm film called APS, a still camera that magnetically records information on a magnetic recording unit on the film, and an electrical information recording Any electronic still camera that electrically records information on a medium may be used.
[0023]
Examples of the recording medium on which the data recording program is recorded include a magnetic disk, a semiconductor memory, and other recording media, and any of them may be used. The data recording program may be any program that is installed or read from the above-described recording medium into the CPU in the camera and controls the operation of the apparatus.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 and FIG. 2 show one embodiment in which the camera data recording apparatus according to the present invention is applied to a still camera equipped with a magnetic recording apparatus and a strobe device capable of switching the synchro mode. In these drawings, FIG. 1 is a block diagram showing a circuit configuration of the data recording apparatus.
[0025]
In FIG. 1, reference numeral 10 denotes a CPU for controlling each mechanism circuit in the camera, and the operation of each mechanism circuit in the camera including the CPU 10 is all performed by power supply from the battery 11.
The CPU 10 receives a signal from a release switch 12 that is turned on / off in response to a release operation of the camera. The release switch 12 is a switch that is turned on by a pressing operation of a release button (not shown) of the camera and starts a photographing operation.
[0026]
Further, the CPU 10 receives signals from a normal / rear changeover switch 13 and an X contact switch 14 for changing a sync mode of a strobe (not shown) provided in the camera to a normal sync mode or a rear sync mode.
The normal / rear changeover switch 13 is a switch of an alternative structure, and selects the normal sync mode when switched to one, and selects the rear sync mode when switched to the other.
[0027]
The X contact switch 14 is a switch interlocked with a shutter front curtain controlled by a shutter control circuit 17 to be described later, and is configured to be turned on when the front curtain is fully opened (opened).
[0028]
Further, the film sensitivity information from the ISO sensitivity setting circuit 15 is input to the CPU 10. This information is the type information of the data recording medium, for example, sensitivity information of the photographic film that is a recording medium for the subject image loaded in a camera set manually or automatically.
The CPU 10 is connected to a shutter control circuit 16, a mirror control circuit 17, a charge circuit 18, a film feeding circuit 19, a strobe control circuit 20, and a data back control circuit 21.
[0029]
Then, in accordance with the signal output from the CPU 10, the shutter control circuit 16 controls the front and rear curtains of the shutter (focal plane shutter mechanism), the mirror control circuit 17 controls the mirror and the diaphragm, and the charge circuit. 18 is used to perform mirror down, aperture reset, and shutter charge, and film feed circuit 19 performs film feed control.
[0030]
The strobe control circuit 20 connected to the CPU 10 is command means for outputting a light emission command for controlling the light emission by transmitting a signal to a strobe (not shown).
Further, the data back control circuit 21 connected to the CPU 10 transmits a signal to a data back (data recording device) for writing information such as the shooting date and time, whereby a data recording medium (for example, a recording medium for recording a subject image). Data recording to a certain film).
[0031]
Here, such a data recording apparatus may be provided inside the camera, or may be detachably attached to the camera like a data back.
The data back (data recording device) includes a timer (timer) (not shown) that counts the current date and time (time) information, and the data recording device records the date and time (time) information output from the timer. It is configured to be recordable by optically imprinting on a medium (photographing film).
[0032]
FIG. 2 shows a control routine related to the release sequence in the case of shooting for performing data recording (data recording by copying optically copying data on a shooting film) and strobe shooting in the CPU 10 in the camera described above. It is a flowchart.
This routine is repeatedly executed while power is being supplied to the CPU 10, and the operation will be described below.
[0033]
Step S1 determines the state of the release switch (release SW) 12, that is, whether or not a release button (not shown) has been pressed. If it is pressed, the process proceeds to step S2, and if it is not pressed, this routine ends.
In step S2, the imprint recording time Td is read. This imprinting recording time Td corresponds to the ISO sensitivity of the film by the ISO sensitivity setting circuit 15 of FIG. 1, and is set to a longer time as the sensitivity is lower.
[0034]
In step S3, shutter time Ts is read. The shutter time Ts is determined by a shutter time manual setting device or an automatic shutter time setting device (not shown).
In step S4, a timer (not shown) serving as a time measuring means serving as a time count reference in the CPU 10 is started.
[0035]
In step S5, the mirror control circuit 17 of FIG. 1 is controlled to start mirror up and start narrowing down.
In step S6, the state of the normal / rear selector switch 13 is determined. If the switch 13 is set to the rear sync mode, the process branches to step S18. If the switch 13 is set to the normal sync mode, the process proceeds to step S7.
[0036]
In step S7, a signal is transmitted to the data back control circuit 21 in FIG. 1, and the data recording operation is performed for a predetermined time determined by the ISO sensitivity information.
In step S8, it is determined whether or not the time counted by the timer has reached the release time lag Tr. If not, step S8 continues to be executed until it reaches, and when it reaches, it proceeds to step S9.
In step S9, the shutter control circuit 16 of FIG. 1 is controlled to run the shutter front curtain.
[0037]
In step S10, it is determined whether or not the X contact switch 14 of FIG. 1 is turned on. If it is not turned on, step S10 is continuously executed until it is turned on, and when it is turned on, the process proceeds to step S11.
In step S11, the strobe control circuit 21 of FIG. 1 is controlled to send a signal to the strobe to emit light.
[0038]
In step S12, it is determined whether or not the count time T by the timer has reached "release time lag Tr + shutter time Ts". If not, step S12 continues to be executed until it reaches, and when it reaches, the process proceeds to step S13.
In step S13, the shutter control circuit 16 in FIG. 1 is controlled to run the shutter rear curtain to complete predetermined exposure.
In step S14, the charge circuit 18 shown in FIG. 1 is controlled to perform mirror down and aperture stop reset.
[0039]
In step S15, the charge circuit 18 in FIG. 1 is also controlled to charge the shutter.
In step S16, the film feeding circuit 20 in FIG. 1 is controlled to execute a film feeding operation.
In step S17, the timer that started counting in step S4 is terminated.
[0040]
If it is determined in step 6 described above that the rear sync mode is set, the process proceeds to step S18 as described above. In this step S18, it is determined whether or not the shutter time Ts is smaller than “front curtain speed T2 + 1”. The leading curtain speed is the time from the start of the opening state of the leading curtain to the full opening. The margin of 1 second is a value that is normally used as the maximum light emission time of the strobe. If the determination result is YES, the process branches to step S7, and if NO, the process proceeds to step S19.
[0041]
In step S19, it is determined whether or not the data back imprint recording time Td is longer than “front curtain travel start time T1 + shutter second time Ts−1”. Here, the front curtain travel start time is the time from when the front curtain magnet is turned off until the shutter actually starts to open. If the determination result is YES, the process branches to step S7, and if NO, the process proceeds to step S19.
In step S20, it is determined whether or not the time counted by the timer has reached the release time lag Tr. If not, step S20 continues to be executed until it reaches, and when it reaches, it proceeds to step S21.
[0042]
In step S21, the shutter control circuit 16 in FIG. 1 is controlled to run the shutter front curtain.
In step S22, it is determined whether or not the time counted by the timer has reached "release time lag Tr + front curtain travel start time T1 + shutter second time Ts-1-printing recording time Td". If not, step S22 continues to be executed until it reaches, and when it reaches, it proceeds to step S23.
[0043]
In step S23, a signal is transmitted to the data back control circuit 21 of FIG. 1, and the data recording operation is performed for a predetermined time determined by the ISO sensitivity information.
In step S24, it is determined whether or not the time counted by the timer has reached “release time lag Tr + front curtain travel start time T1 + shutter second time Ts−1”. If not, step S24 continues to be executed until it reaches, and when it reaches, it proceeds to step S11.
That is, when the rear sync mode is set, regardless of whether the X contact switch 14 is turned on or off, the flash command is issued based on the output result of the timer, which is the time measuring means, and the flash is emitted. is there.
[0044]
Next, a description will be given of the operation of copying the recording data by flash emission and data back during actual photographing.
(1) When set to normal sync mode
When a release button (not shown) is pressed and the on state of the release switch 12 is detected, the process proceeds from step S1 to steps S2 and S3, and the imprint recording time Td and the shutter time Ts are read. Further, after the timer starts counting in step S4, mirror up is started in step S5.
[0045]
In step S6, the normal or rear sync mode is determined. In this case, since the normal sync mode is selected, step S7 and subsequent steps are executed. That is, in step S7, instant data copying is executed.
When the timer time reaches a predetermined release time lag in step S8, the front curtain magnet is turned off in step S9 to start the front curtain travel. Thereafter, the X contact switch 14 is turned on in step S10, and a light emission command is issued to the strobe in step S11.
[0046]
In step S12, when the time of the timer becomes the release time lag Tr + the shutter time Ts, the process proceeds to step S13, the rear curtain magnet is turned off, and the rear curtain travel is started. This completes exposure for a predetermined shutter speed Ts.
Subsequently, steps S14, S15, and S16 are executed to perform mirror and aperture reset, shutter charge, and film feeding. Finally, the timer is turned off (reset), and a series of release sequences is completed.
Since the operation is as described above, in this case, the strobe is emitted immediately after the shutter front curtain is fully opened regardless of the shutter time Ts, and normal normal sync photography is performed.
[0047]
(2) When the rear sync mode is set
When the rear sync mode is set, the operation to be executed differs depending on the value of the shutter time Ts.
First, a case where the shutter speed Ts is smaller than “front curtain speed T2 + 1” will be described.
After step S5 is executed as in the normal sync mode, the normal or rear sync mode is determined in step S6. In this case, since the rear sync mode is selected, the process branches to step S18.
[0048]
In step S18, it is determined whether or not the shutter speed Ts is smaller than “front curtain speed T2 + 1”. In this case, since it is determined as YES, the process returns to step S7, and thereafter the same operation as in the normal sync mode is performed. Execute.
This is because, under the condition of “Ts> T2 + 1”, there is no practical distinction between normal sync and rear sync, and the same operation as in the normal sync mode may be performed.
[0049]
Next, a case will be described in which the shutter time Ts is equal to or higher than “front curtain speed T2 + 1”, but the imprint recording time Td is longer than “front curtain travel start time T1 + shutter time Ts−1”.
In this case, after executing up to step S5, the process branches to step S18 in step S6. Since “Ts ≧ T2 + 1” in step S18, the process proceeds to step S19.
In step S19, it is determined whether or not Td is larger than “T1 + Ts−1”. However, since this is YES, the process returns to step S7, and thereafter the same operation as in the normal sync mode is executed. This is because the recording time Td is long and the printing starts before the shutter front curtain starts. Even if there is a difference in the light emission timing between the normal and rear sync modes, the timing of the printing is normal synchronization. Even if it is carried out in the same manner as in the mode, there is substantially no difference between the light emission timing and the imprinting timing, so this processing is performed.
[0050]
Finally, the case where the shutter time Ts is “first curtain speed T2 + 1” or more and the imprint recording time Td is “T1 + Ts−1” or less will be described.
In this case, after executing similarly to step S5, it branches to step S18 by step S6. Since “Ts ≧ T2 + 1” in step S18, the process proceeds to step S19.
In step S19, it is determined whether or not Td is larger than “T1 + Ts−1”. Since this is NO, the process proceeds to step S20.
When the timer time reaches a predetermined release time lag in step S20, the front curtain magnet is turned off in step S21 to start the front curtain travel.
[0051]
Step S22 is a step of waiting for the timing for starting imprinting. The determination is made based on whether the count time T of the timer has reached “Tr + T1 + Ts−1−Td”. In short, this means that imprint recording is started earlier by the imprint recording time Td than the light emission timing. Normally, the recording time for printing is several tens of milliseconds, so if it is performed at the same time as the light emission timing, the data recording by printing may not be completed even when the film feeding starts after the shutter is closed. This is to prevent it from coming.
[0052]
When the imprint timing is reached in step S22, the process proceeds to step S23 and data imprinting is executed.
Step S24 is a step of waiting for the light emission start timing. Judgment is made based on whether the count time T of the timer has reached "Tr + T1 + Ts-1". When reached, the process proceeds to step S11, and thereafter, the strobe is emitted in step S11 as in the normal sync mode, the shutter is closed in steps S12 and 13, and the mirror, aperture reset, and shutter charge are performed in steps S14, 15, and 16. Then, the film feeding is executed, and finally the timer is turned off (reset) to complete a series of release sequences.
[0053]
According to the camera data recording apparatus of the present invention as described above, the rear sync mode is used to illuminate with the light of the strobe light in a situation where a relatively long exposure and strobe shooting are simultaneously performed. Since the photographing time of the main subject and the data imprinting time substantially coincide with each other, more accurate data recording can be performed as compared with the conventional one. Therefore, it is effective not only for general photography but also for academic purposes.
[0054]
This will be described below with a specific example.
Consider a case where flash photography is performed by rear-synchronization at night, for example, when a running car is shot in such a way that a trail of light is left behind.
Here, the exposure time with this camera is assumed to be 5 seconds. Further, the time required for data recording by imprinting is several tens of milliseconds for a generally used film sensitivity, so it is assumed to be 30 milliseconds. The time lag for the release operation is 100 milliseconds.
[0055]
Under these conditions, when the data recording device is set to record the time up to the second, in the conventional data recording device, the strobe emits light, and the time when the car is clearly projected is 100 milliseconds, which is 5 seconds added. That is, the time before 5.1 seconds is recorded, which causes a problem. However, according to the data recording apparatus of the present invention, the time of only 30 milliseconds before the emission is recorded, and the difference between the time recorded on a clear photograph and the recording time can be virtually ignored. it can.
[0056]
Further, according to the present invention, in the apparatus for recording data by imprinting by the data recording means (21), even in the case of the rear sync mode and the long data recording time, the recording in the normal and rear sync modes is performed. By making data different and recording data at different timings as data recording information, the film feeding start timing after shooting is not unnecessarily delayed.
[0057]
In the above-described embodiment, the case where data recording is performed by optical imprinting has been described, but the present invention is not limited to this. For example, as a data recording method, in addition to the above-described data recording by optical imprinting, a data recording apparatus that magnetically records information on a magnetic recording medium provided on a photographing film is also conceivable.
It is also conceivable to record information on a recording medium different from the film (for example, a medium that electrically holds information, such as a so-called memory card).
[0058]
Hereinafter, a camera that magnetically records information and a camera that electrically records information will be described.
FIG. 3 is a block diagram showing an apparatus for recording data by a recording method other than imprinting. In FIG. 3, components having the same functions as those shown in FIG. .
[0059]
In the figure, reference numeral 33 denotes a timer or a clock circuit as a clock means, which clocks the date and time (time) and outputs different date and time (time) data at the timing at which the strobe emits light. Note that this timing circuit 33 may be incorporated in the CPU 10.
The date and time (time) data output from the timer circuit 33 is temporarily stored in the memory 32 which is an electrical information recording medium (storage means) in the CPU 10.
[0060]
Data stored from the memory 32 is sent to the data recording circuit 31 at various timings.
As a data transfer timing from the memory 32 to the data recording circuit 31, in a camera that magnetically records information on a film, a timing after the end of photographing and before the film feeding can be considered.
In addition, as a camera for recording on a recording medium different from the film (camera for recording information on an electrical information holding medium), a timing after the end of photographing or a timing associated with a power-off operation can be considered. Note that when the above-described electrical information holding medium is detachable from the camera, the electrical recording medium can be taken out from the camera.
[0061]
The data recording circuit 31 records the data transferred from the memory 32 on a recording medium (such as a magnetic recording medium provided on a film or a memory card as an electrical information holding medium).
The timing of recording information on a recording medium in a camera that records information magnetically is considered to be when a piece of film is fed or fed back after filming or when the film is rewound.
In addition, the information recording timing to the recording medium in the camera that electrically records information includes the timing after the above-described photographing and the timing associated with the power-off operation, and this electric recording medium can be attached to and detached from the camera. In such a case, it is possible to take out the electric recording medium from the camera.
[0062]
The operation of a camera that records information magnetically or a camera that records information electrically can be applied by changing a part of FIG.
That is, for a camera equipped with a data recording device for magnetically recording information, step S7 and step 23 are deleted in FIG. If the timing circuit 33 outputs the date and time (time) data at the time of strobe light emission at the time of step S11, the flowchart of FIG. 2 is an operation flowchart of the magnetic recording camera as it is. Here, as the data transfer timing from the memory 32 to the data recording circuit 31, the timing as described above can be considered.
[0063]
On the other hand, steps S7, 23, and S16 are deleted from FIG. 2 for a camera that includes a data recording device that electrically records information. If the timing circuit 33 outputs the date and time (time) data at the time of the strobe light emission at the time of step S11, the flowchart of FIG. 2 becomes the operation flowchart for the electronic still camera as it is. Here, the data transfer timing of the first time information and the second time information from the clock circuit 33 from the memory 32 to the data recording circuit 31, and the first and second data to the recording medium by the data recording circuit 31 are shown. As the information recording timing of the time information, the timing as described above can be considered.
[0064]
Note that the present invention is not limited to the structure described in the above-described embodiment, and it goes without saying that the shape and structure of each part can be appropriately modified and changed. For example, as a camera to which the present invention is applied, a still camera using a 35 mm film or a camera using a new type of 24 mm film called APS (Advanced Photo System), which records data on a magnetic recording unit on the film. As a matter of course, the still camera provided with the recording device may be an electronic still camera provided with a data recording device for recording image information and photographing information in the information recording unit.
[0065]
In addition, as a recording medium on which the above-described data recording program is recorded, a program for controlling the above-described data recording processing depending on whether the sync mode is normal sync or rear sync is executed. Therefore, the specific description here is omitted.
[0066]
【The invention's effect】
As described above, according to the camera data recording apparatus of the present invention, the first time information and the second time information are set depending on whether the setting by the mode setting means of the sync mode is the normal sync mode or the rear sync mode. Since different recording data is recorded by the data recording means, the following excellent effects are obtained.
[0067]
According to the present invention, the recording time of the subject image by the light emission of the light emitting device and the recording time such as the first and second time information (light emission time data) of the data recording are substantially the same in both the normal sync mode and the rear sync mode. Can be simultaneous. For example, in a situation where a relatively long exposure and strobe shooting are performed simultaneously using the rear sync mode, the shooting time of the main subject illuminated by the flash light and the data transfer time are almost the same. Therefore, more accurate data recording is possible as compared with the conventional one. Therefore, it is effective not only for general photography, but also when used as evidence photography for panning a moving subject or for academic purposes.
[0068]
In particular, according to the present invention, a photograph is obtained in which the difference between the time when the subject image is recorded on a clear photograph and the data recording time according to the first and second time information can be virtually ignored. Can do.
Furthermore, according to the present invention, even in the rear sync mode and when the data recording time is long, the film feeding start timing after photographing is not unnecessarily delayed.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a circuit configuration of an entire camera in one embodiment of a camera data recording apparatus according to the present invention.
FIG. 2 is a flowchart showing a control routine related to a release sequence at the time of actual photographing by a CPU.
FIG. 3 is a block diagram for explaining a circuit configuration of the entire camera showing another embodiment of the camera data recording apparatus according to the present invention;
[Explanation of symbols]
10 ... CPU (command means), 11 ... battery, 12 ... release switch, 13 ... normal / rear switch (mode setting means), 14 ... X contact switch, 15 ... ISO sensitivity setting circuit (data recording such as photographic film) Means for obtaining medium type information), 16 ... Shutter control circuit (shutter control mechanism), 17 ... Mirror control circuit, 18 ... Charge circuit, 19 ... Film feeding circuit, 20 ... Strobe control circuit (light emission command means), 21 Data back control circuit (data recording means, data recording device) 31 Data recording circuit (data recording means, data recording device) 32 Memory (storage means) 33 Time counting circuit (time measuring means)

Claims (7)

A camera capable of recording information on a recording medium,
Command means for outputting a light emission command for causing the light emitting device to emit light;
A shutter mechanism that maintains an open state for a predetermined time for image recording;
A normal sync mode in which the command means is activated at a first timing after the shutter opening operation of the shutter mechanism, and a second timing different from the first timing before the shutter closing operation of the shutter mechanism. Mode setting means for switching and setting a rear sync mode for starting the command means;
Time measuring means for timing and outputting first time information according to the first timing and second time information according to the second timing;
A data recording apparatus for a camera, comprising: data recording means for recording the first time information in the normal sync mode and the second time information in the rear sync mode. The camera data recording device according to claim 1,
A data recording apparatus for a camera, wherein the data recording means has a timing for recording the first time information and a timing for recording the second time information. The data recording device for a camera according to claim 2,
The recording time of the data recording means can be changed according to the type of the data recording medium,
The timing of data recording by the data recording means is set when the command means emits a light emission command in the normal sync mode, and in the rear sync mode, it depends on the recording time of the data recording means than when the command means sends a command signal. A data recording device for a camera, characterized in that it is set to be faster by the amount of time. In the camera data recording device according to claim 3,
The data recording apparatus of a camera, wherein the type information of the data recording medium is sensitivity information of a photographic film. The camera data recording device according to claim 1,
Storage means for storing the first time information and the second time information;
The data recording device for a camera, wherein the data recording means records information stored in the storage means on the recording medium. In the camera data recording device according to claim 1 or 5,
The recording medium is a magnetic recording medium provided on a photographic film;
The camera data recording apparatus, wherein the data recording means magnetically records the time information on the magnetic recording medium. In the camera data recording device according to claim 1 or 5,
The recording medium is an electrically recordable medium,
The data recording device, wherein the data recording means electrically records the time information on the recording medium.

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