JP2001166353A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of reducing an under inclination in a close-up photographing mode. SOLUTION: This camera is provided with an ordinary photographing mode in which previously decided exposure control is performed by making a stroboscope emit light when an EV value arithmetically calculated based on measured subject luminance is equal to or under a specified value, and a close-up photographing mode in which the stroboscope is always made to emit the light and a diaphragm is set to minimum aperture. Then, photographing permitting charge voltage to permit the photographing by using the stroboscope at the time of setting the close-up photographing mode is set higher than that at the time of setting the ordinary photographing mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a camera capable of performing close-up photography, and more particularly to a camera in which the tendency of underexposure in a close-up photography mode is reduced.

[0002]

2. Description of the Related Art In general, there is known a camera for performing close-up photographing of a subject by adjusting the aperture and exposure time of a shutter. At high speeds, the exposure time was shortened, the aperture of the shutter was made smaller, and the depth of field was increased to enable close-up photography.
Here, if the shutter is forcibly set at a high shutter speed to set a small aperture, there is a possibility that underexposure will occur. Therefore, in such a case, the strobe light is emitted to reduce the underexposure. In addition, the charging of the above-mentioned strobe is completed before the photographing operation, and when the release SW is pressed, if it is not charged yet, it is charged until the photographing permission charge level is reached,
The photographing operation is started when the photographing permission charge level is reached. Normally, the shooting permission charge level at this time is set lower than the full charge level of the flash,
This is to reduce the time lag between pressing the release and starting shooting. Therefore, in this case, the charge level at the time of flash emission in the close-up shooting may be lower than the full charge level, and when the charge level becomes lower, the GNo (guide number) becomes lower, and as a result, the distance that the flash reaches becomes shorter. However, depending on the subject distance, there is a problem that an under photograph is generated. Therefore, in a negative film, the release permission charge level is determined so that the underexposure is within a correctable level. However, in the close-up shooting mode, the exposure by the shutter has a small aperture due to the high-speed control regardless of the subject brightness value, and therefore, depending on the subject, the exposure tends to be much lower than in the normal shooting mode. Therefore, when the GNo decreases due to the low charging level of the strobe, the under tendency is further spurred, and there is a problem that the captured image becomes very dark.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a camera capable of reducing the tendency of under photographing in the close-up photographing mode. To provide.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, a strobe light is emitted when an EV value calculated based on a measured copy body luminance is equal to or less than a predetermined value. In a camera having a normal shooting mode in which predetermined exposure control is performed and a close-up shooting mode in which the strobe is constantly lit and the aperture is set to the minimum aperture, a shooting permission for strobe shooting when the close-up shooting mode is set. It is characterized in that the charging voltage is set higher than the strobe shooting permission charging voltage when the normal shooting mode is set. According to the camera of the first aspect, it is possible to suppress a decrease in GNo and reduce the tendency to under. According to a second aspect of the present invention, in the close-up photographing mode, the photographing permission charge voltage of the strobe is a full charge voltage of the strobe charge voltage. According to the second aspect of the present invention, it is possible to take an image with the maximum GNo of the strobe used by the simple control. According to a third aspect of the present invention, in a camera that performs a photometric operation in a first release-on state and performs a photographing operation in a second release-on state, the timing of charging is the first release-on state. It is characterized by. According to the camera described in the third aspect, it is possible to perform shooting in which the tendency of under shooting can be reduced by charging before shooting. According to a fourth aspect of the present invention, in a camera having a remote control function and performing a photometric operation after receiving a remote control signal and performing a photographing operation, charging is performed after the photometric operation. . According to the camera of the fourth aspect, even during remote control shooting, it is possible to perform shooting that can reduce the under tendency by charging before shooting. The invention according to claim 5 is characterized in that the shooting permission charging voltage can be changed. According to the camera according to the fifth aspect, by adjusting the photographing permission charging voltage, it is possible to adjust the exposure to a proper value.

According to a sixth aspect of the present invention, there is provided a normal photographing mode in which a strobe light is emitted when an EV value calculated based on a measured copy body luminance is equal to or less than a predetermined value, and a predetermined exposure control is performed. The camera has a close-up shooting mode in which the strobe is always lit and the aperture is set to the minimum aperture. When the close-up shooting mode is selected, high-speed time control is performed so that the aperture is set to the minimum aperture regardless of the subject brightness. The above high-speed time control is repeated a plurality of times until exposure is obtained. According to the camera of the sixth aspect, by increasing the exposure time, the under tendency can be reduced. The invention according to claim 7 is characterized in that the number of times of the high-speed time control is the number of times in which the influence of the camera shake does not occur. According to the camera of the seventh aspect, it is possible to reduce the influence of camera shake due to camera shake. The invention according to claim 8 is characterized in that, when the strobe is used in the close-up shooting mode, the strobe light emission timing is the first high-speed time control of the plurality of high-speed time controls. According to the camera described in claim 8, a strobe is used,
And by emitting light for the first time, the under tendency can be reduced.
According to a ninth aspect of the present invention, the number of times of the high-speed time control can be changed. According to the camera of the ninth aspect, by adjusting the number of times of the high-speed time control, it is possible to adjust to the appropriate exposure.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the internal control configuration of a camera embodying the present invention. As shown in FIG. 1, the camera has a CPU 1 as a central processing unit. The CPU 1 includes a photometric IC 3, an AFIC (multi-distance IC) 5, a strobe unit 7, an LCD 9, an EEPR.
The OM 11, the lens barrel unit 13, and the feeding unit 15 are connected to each other, and in accordance with an instruction signal input from a plurality of switches SW 1 to SW 6 similarly connected to the CPU 1,
It is controlled by PU1. The above C
A power supply (battery) 17 and a clock signal generator 19 are connected to the PU 1. Next, the operation of the camera shown in FIG. 1 will be described with reference to the flowcharts of FIGS. First, FIGS. 2 and 3 are flowcharts of a photographing process in the normal photographing mode. First, the CPU 1 performs an operation control corresponding to each of the switches SW1 to SW6 in response to an input of each of the switches SW1 to SW6. The switch SW1 is a first release switch. When an instruction signal from the first release switch SW1 is input to the CPU 1,
The CPU 1 enters a first release-on process as shown in FIG. As shown in FIG. 2, in the first release-on process, a battery check operation is performed in step 101, and when the battery 17 is NG (when the battery 17 is equal to or less than a predetermined value: NO in step 103) ) Ends the process here. That is, the release lock is set.

Next, if the battery is OK in step 103, a photometric operation is performed by the photometric IC 3 (step 105), and then a multi-ranging operation is started by the multi-ranging IC (AFIC) 5 as an AF operation (step 105). 107). In the multi-ranging operation, seven zones are measured, and the closest zone is adopted. Next, in steps 109 and 111, based on the photometry result and the distance measurement result,
An AF calculation process and an AE calculation process are performed to determine the aperture, shutter speed, shutter opening time, strobe light emission time, and light emission timing. Next, step 113
In the above, it is determined whether or not the electronic flash is in the flash use mode based on whether or not the EV value calculated based on the measured copy body luminance is equal to or less than a predetermined value. In the case of the flash use mode, the charging state of the flash unit 7 is checked. If the charging level is low, the charging operation is started up to the photographing permission charging level (steps 115 and 117). Next, in step 119, focus calculation processing for converting the distance data obtained from the AF calculation processing into the number of payout steps for the focus operation is performed. Next, in step 121,
Perform focus operation. Here, the first release-on process is completed, and the second release SW2 waits or the first release SW1 waits for off. First release SW1
Is turned off, a first release-off process is executed. In the first release-off process, the operation of turning off the display LED and returning the lens (barrel) position to the standby position are performed.

Next, FIG. 3 shows a flow of a second release-on process. When an input of the second release SW2 is detected in the first release-on state, the second release-on process is started. . In the second release-on process, a release prohibition determination is made in step 123, and if release is permitted, in step 125, the shutter operation and the use of the strobe are performed using the shutter opening time calculated from the AE calculation process. At the time, strobe light emission control is performed based on the light emission time and the light emission timing time. Thereafter, the lens (barrel) is returned to the standby position, and the film feeding operation is performed (steps 127 and 129). Next, the switch SW3 is a photographing mode switch, which enables the photographer to arbitrarily set a mode according to a photographing scene. Normally, the multi-AF low-luminance automatic light emission mode (normal mode) is used.
Each time is pressed, the single AF mode, the distant view mode, the close mode and the shooting mode are updated. When the shooting mode switch SW3 is further pressed, the mode returns to the low-luminance automatic light emission mode (normal mode) of the multi AF (FIG. 4). reference). That is, as shown in FIG. 4, when the photographing mode switch SW3 is pressed, it is determined in step 131 whether or not the previous time is the normal mode. If the single AF mode is set and the previous mode is not the normal mode in step 131, it is determined in step 135 whether the previous mode is the single AF mode. Step 1 above
If the previous time is the single AF mode in 35, the distant view mode is set in step 137. If the previous time is not the single AF mode in step 135, it is determined in step 139 whether the previous time is the distant view mode. If the previous mode is the distant view mode in step 139, the close mode is set in step 141, and the lens is moved in step 143. If the previous mode is not the distant view mode in step 139, the normal mode is set in step 145, and the lens is returned to the standby position in step 147. That is, step 14
If the close-up mode is set in Step 1, the lens position is changed to the close-up photographable position (35 in Step 143).
cm equivalent), and when the mode is updated to the normal mode by pressing the shooting mode switch SW3 from the close mode, the lens position is moved to the standby position in step 147. (A) to (d) of FIG. 8 are LCD displays in each of the above modes. That is, FIG.
FIG. 8A shows an LCD display in the normal mode.
8B shows the LCD display in the single AF mode, FIG. 8C shows the LCD display in the distant view mode, and FIG. 8D shows the LCD display in the close mode. FIG. 8E is a view showing the LCD display in the full display state.

Next, the operation in the close-up photographing mode will be described. 5 and 6 show a photographing processing flow in the close-up photographing mode state. First, in the first release-on process, in step 201, a battery check operation is performed,
Here, if the battery 17 is NG (NO in step 203), the process ends here. That is, the release lock is set. Next, if the battery is OK in step 203, the photometric operation is performed by the photometric IC 3 (step 205), and the multi-ranging operation is started by the multi-ranging IC 5 as the AF operation (step 20).
7). In this multi-ranging operation, seven zones are measured, and the closest zone is adopted. Next, step 20
In steps 9 and 211, the AF and AF
The arithmetic processing and the AE arithmetic processing are performed to determine the shutter open time, the flash light emission time, and the light emission timing. In the shutter open time in the AE calculation process in step 211, high-speed time data is set so that the aperture becomes minimum regardless of the photometric value. Also, the strobe light emission timing is set to the minimum aperture that can be set regardless of the subject distance. Next, in step 213, it is determined whether or not the distance measurement operation is OK. If the distance measurement operation is OK, the process proceeds to determination of whether or not the mode is the proximity mode (step 215). If the distance measurement operation is not OK, step 217 is performed. , The AFLED (alarm light) is blinked at 8 Hz. Next, when it is determined in the above step 215 that the mode is the proximity mode, the process proceeds to step 219, in which distance data is calculated from the distance measurement result, and a determination within the depth of field is performed. If it is within the depth of field in step 219, AFLE
D is turned on (step 221), and when it is out of the depth of field, the AFLED blinks at 2 Hz (step 223),
Prohibition information is set in the release prohibition status, and RL
Prohibition information is set (step 225). If it is not in the close-up mode in step 215, it is determined in step 227 whether or not it is within the shooting range. If it is within the shooting range, the AFLED is turned on (step 22).
9) If it is out of the photographing range, the AFLED blinks at 2 Hz, prohibition information is set in the release prohibition status,
RL prohibition information is set (steps 231 and 23).
3).

Next, at step 235, it is determined whether or not the camera is in the proximity mode.
In 7, the charge level calculation is performed. This close-up shooting mode shooting permission charge level is a value higher than the shooting permission charge level other than in the close-up shooting mode, and is set to the full charge level in this embodiment. Next, step 23
In 9, it is determined whether or not the charge level has reached the above-described close-up shooting mode shooting permission charge level. If not, in step 241, a charge operation is performed, followed by focus calculation and focus operation. Is performed (steps 243 and 245). Next, when it is determined in step 235 that the current mode is not the close mode, a charge determination is made in step 247. The charge level of the photographing permission here is lower than the charge level of the close photographing mode (full charge level). The charge level is a predetermined charge level (specifically, the same charge level as the photographing permission charge level in step 115 in FIG. 2). Note that the close-up shooting mode shooting permission charge level may be variable. Then, the above step 247
If it is determined in step 249 that charging is necessary, step 249
In, a charging operation is performed. Next, as shown in FIG. 6, in the second release-on process, when the second release switch SW2 is pressed, a release inhibition determination is made in step 251, and inhibition information is set in the release inhibition status. In this case (prohibited in step 251), release 2 processing (photographing operation) is prohibited,
If the prohibition information has not been set (step 25
In step 253, it is determined whether or not the camera is in the proximity mode (step 255). In the case of the proximity mode, the shutter opening / closing operation is performed at a high speed so that the aperture becomes minimum. The shutter operation is performed a plurality of times (six times) while the shutter operation is within 1/30 second (steps 257, 2).
59, 261, 263). In addition, a strobe light is emitted during the first shutter operation. At this time, the synchro signal is output at the timing at which the strobe light emission timing also becomes the minimum aperture. Note that the number of times of the high-speed time control may be variable.

Next, in step 265, it is determined whether or not the camera is in the proximity mode. In the proximity mode, the lens position is fixed, so that the operation of moving the lens barrel to the standby position is not performed.
A film feeding operation is performed (step 269). If it is determined in step 265 that the mode is not the close mode, in step 267, the operation of moving the lens barrel to the standby position is performed. Further, the fourth to sixth SWs 4 to S
With W6, the setting of the clock (calendar) display on the LCD 9 can be changed. The fourth SW4 changes the display mode, and the display can be switched between year, month, day, month, year, day, month, year, date, minute, and year, month, day, and year for each input. That is, as shown in FIG. 7, when the watch mode switch SW4 (fourth switch) is turned on, it is determined in step 271 whether or not the previous date / time mode has been set. At 273, the date / month / day mode is displayed. If it is not the previous date / month / day mode at step 271, it is determined at step 275 whether or not the previous date / month / year mode is set. In the case of the previous month-day-year mode in step 275, a month-day-year mode is displayed in step 277. If the previous month-day-year mode is not determined in step 275, it is determined in step 279 whether or not the last day-month-year mode is set. Is done. If the previous date / month / year mode is selected in step 279, the date / month / year mode is displayed in step 281. If the previous date / month / year mode is not determined in step 279, the process proceeds to step 283.
The date and time mode display is performed. The fifth and sixth switches SW5 and SW6 are the items (year / month / day / hour or hour or) to be corrected by the clock (calendar) display correction SW.
The selected display flashes when it is selected for selecting (minute). The sixth switch SW6 is effective in this blinking state, and the value of the blinking display is incremented by one for each input. The LCD 9 can display a clock, a film counter, a shooting mode mark, a battery mark, and the like (see FIG. 8E). In addition, the EEPROM 11
Is a nonvolatile storage element for storing adjustment values and the like before shipment of the camera, as well as the first and second adjustment values in the close-up shooting mode.
The charge determination value when the release switches SW1 and SW2 are pressed, the number of times the shutter is controlled at high speed, and the like are also stored. The lens barrel unit 13 has a motor for operating a lens barrel (lens), a position detection SW for detecting a current position, a movement amount detection SW for detecting a movement amount, and a movement amount SW for operating a shutter. A trigger SW for detecting a trigger of a motor and a shutter is incorporated. The feeding unit 15 has a built-in motor for feeding the film and a detection SW for detecting the amount of movement of the film. Further, the present invention includes a receiving unit for receiving a remote control signal from the outside, a decoding unit for decoding the received remote control signal, and a determining unit for determining whether the decoded result is a correct remote control signal, If the remote control signal is correct, the present invention can be applied to a camera that performs a photometric operation after performing a photometric operation. In this case, the timing of performing the charge control is after the photometric operation.

[0012]

According to the present invention, the photographing permission voltage for permitting strobe photographing in the close-up photographing mode is set higher than the strobe photographing permitting voltage in the normal photographing mode. The tendency can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the internal control configuration of a camera embodying the present invention.

FIG. 2 is a photographing processing flowchart in a normal photographing mode.

FIG. 3 is a photographing processing flowchart in a normal photographing mode.

FIG. 4 is a flowchart showing an operation according to the embodiment of the present invention.

FIG. 5 is a flowchart of a photographing process in a close-up photographing mode state.

FIG. 6 is a flowchart of a shooting process in a close-up shooting mode state.

FIG. 7 is a flowchart showing an operation according to the embodiment of the present invention.

FIG. 8 is a diagram showing an LCD display in each mode of the present invention.

[Explanation of symbols]

1. CPU, 3. Photometry I
C, 5: AFIC (multi-ranging IC), 7: strobe unit, 9: LCD,
11: EEPROM, 13: lens barrel unit,
15: feeding unit, 17: battery, 19: clock signal generator, SW1 to SW6: first to sixth switches

Claims (9)

[Claims] When an EV value calculated based on a measured copy body luminance is equal to or less than a predetermined value, a strobe light is emitted;
A camera having a normal shooting mode in which a predetermined exposure control is performed and a close-up shooting mode in which the strobe is constantly lit and the aperture is set to the minimum aperture, and a shooting permission for strobe shooting when the close-up shooting mode is set. A camera characterized in that the charging voltage is set higher than the strobe shooting permission charging voltage when the normal shooting mode is set. 2. The camera according to claim 1, wherein the flash-capable charging voltage of the strobe in the close-up shooting mode is a full charging voltage of the flash. 3. A camera which performs a photometric operation in a first release-on state and performs a photographing operation in a second release-on state, wherein charging is performed in the first release-on state. The camera according to claim 1. 4. A camera having a remote control function and performing a photometric operation after receiving a remote control signal and performing a photographing operation, wherein charging is performed after the photometric operation. The described camera. 5. The camera according to claim 1, wherein the photographing permission charging voltage can be changed. 6. When a EV value calculated based on the measured copy body luminance is equal to or less than a predetermined value, a strobe light is emitted;
A camera having a normal shooting mode for performing a predetermined exposure control, the camera having a close-up shooting mode in which a strobe is constantly lit and an aperture is set to a minimum aperture. A high-speed time control in which the aperture is at a minimum, and the high-speed time control is repeated a plurality of times until a proper exposure is obtained. 7. The method according to claim 6, wherein the number of times of the high-speed time control is the number of times at which the influence of the camera shake does not occur.
The described camera. 8. The camera according to claim 6, wherein when using the strobe in the close-up shooting mode, the strobe light emission timing is the first high-speed time control of the plurality of high-speed time controls. . 9. The camera according to claim 6, wherein the number of times of the high-speed time control can be changed.