JPH0882829A - Camera capable of changing shutter speed setting range - Google Patents

Abstract

PURPOSE: To provide a camera capable of preventing reduction in operabilities at the time of setting a shutter speed, even if low- and high-speed limit values are widely set by providing at least first and second shutter speed setting ranges. CONSTITUTION: The camera capable of photographing at the shutter speed in a range from the low-speed limit value to the high-speed limit value is equipped with a mode switch 9 and a dial 7 operated to select one of the first shutter speed setting range and the second shutter speed setting range different from the first range, which are set in the range from the low-speed limit value to the high-speed limit value respectively and a control circuit 1 setting the shutter speed fixed in the selected shutter speed setting range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of changing a setting range of shutter speed.

[0002]

2. Description of the Related Art The shutter speed setting range of a conventional camera is fixed between a predetermined low speed limit value and a high speed limit value. For example, the low speed limit value is 30 seconds.
When 1/8000 seconds is predetermined as the high speed limit value, one of a plurality of shutter speeds set during that time is always set.

Except for long exposure photography such as night view and Hoshino photography, shutter speed is 1 second to 1 for most photography.
If it can be selected in the range of / 8000 seconds, it will be in time. 30
For long-exposure shooting that requires an exposure time of about a second or longer, you can set the valve with the shutter speed setting device and use the cable release to expose while watching the clock or set the long-exposure setting. Set the exposure time using various accessories. Therefore, if the low-speed limit value of the setting range of the shutter speed is set to, for example, 30 seconds or longer and the high-speed limit value is set to 1/8000 second, shooting can be performed at a desired shutter speed.

However, widening the low speed limit value and the high speed limit value inevitably increases the number of shutter speeds that can be set between them. For example, in the method of setting the shutter speed with a dial, the number of rotations of the dial is very large. There is a problem of becoming. When the shutter speed is finely set in steps of ½ step or ⅓ step between the low speed limit value and the high speed limit value, the number of rotations is further increased.

An object of the present invention is to provide a camera in which the shutter speed setting range can be changed so that the operability at the time of setting the shutter speed is not deteriorated even if the number of steps at which the shutter speed can be set increases.

[0006]

In order to achieve the above object, a camera according to the present invention is a camera capable of photographing at a shutter speed between a low speed limit value and a high speed limit value, wherein the low speed limit value to the high speed limit value. Selection means for selecting one of a first shutter speed setting range and a second shutter speed setting range different from the first shutter speed setting range.
Setting means for setting the shutter speed set in the shutter speed setting range selected by the selecting means. The first shutter speed setting range and the second shutter speed setting range may be fixed. The first
Further, a changing unit for changing the low speed limit value and / or the high speed limit value of the second shutter speed setting range may be further provided. Mode setting means for setting any one of a plurality of exposure modes and one of the first and second shutter speed setting ranges when a specific mode of the plurality of exposure modes is set. You may further provide the control means which makes only selection possible. The exposure mode includes at least a manual mode in which a shutter speed and an aperture value are manually set, and the control unit controls the first and second shutter speed setting ranges to
Either one of the shutter speeds including a longer shutter speed may be selected only when the manual mode is set. In order to achieve the above object, another camera according to the present invention is a camera capable of shooting at a shutter speed between a low speed limit value and a high speed limit value,
Changing means for arbitrarily changing the shutter speed setting range between the low speed limit value and the high speed limit value, and setting means for setting any shutter speed in the shutter speed setting range set by the changing means. And.

[0007]

In the camera according to the first aspect of the present invention, the selection means selects the first shutter speed setting range or the second shutter speed setting range. The shutter speed within the selected setting range is set by the setting means. In the camera according to the invention of claim 6, the shutter speed setting range is changed by the changing means. The setting means sets the shutter speed within this setting range.

[0008]

【Example】

-First Example- A first example will be described with reference to Figs. In FIG. 1, a control circuit 1 is mainly composed of a CPU and controls the operation of the camera. The shutter control circuit 2 drives the shutter 3 at the shutter speed set by the shutter drive signal from the control circuit 1. The aperture control circuit 4 uses the aperture value set by the aperture drive signal from the control circuit 1 to set the aperture 5
Drive. 6 is an exposure mode change switch that is turned on when selecting an exposure mode, 7 is a dial that outputs a signal according to the amount of rotation, and 8 is a liquid crystal display device 8 that displays setting states such as the exposure mode and shutter speed. . When the dial 7 is rotated while the exposure mode change switch 6 is on, the program mode,
The shutter priority mode, the aperture priority mode, and the manual mode are sequentially selected. When the desired mode is confirmed on the display device 8 and the ON operation of the exposure mode switch 6 is stopped, the exposure mode is set. When the dial 7 is rotated after selecting the shutter priority mode, the shutter speed is changed. The shutter speed setting range change mode switch 9 is a switch for setting a mode for selecting one of a first and a second shutter speed setting range, which will be described later, and the dial 7 is rotated with the switch 9 turned on. Set the desired shutter speed setting range. The switches 10 and 11 will be described later.

FIG. 2 is a diagram showing the setting range of the shutter speed in the camera of the first embodiment.
It is possible to shoot with a valve and a shutter speed of 19 steps from 30 seconds to 1/8000 seconds. In the first embodiment, first and second shutter speed setting ranges are provided in advance. A valve and a shutter speed of 14 steps from 1 second to 1/8000 seconds are defined in the first shutter speed setting range, and a valve and 30 seconds to 1/8000 seconds are set in the second shutter speed setting range. A shutter speed of 19 steps up to the second is defined.

The setting of the first and second shutter speed setting ranges is performed by the procedure shown in FIG. When the shutter speed setting range change mode switch 9 is turned on to enter the setting range change mode, in step S15,
Check the status of the shutter speed setting range change mode switch again. When this switch is on, the process proceeds to step S16 to enter the shutter speed setting range mode. Here, for example, a display indicating that the setting range of the shutter speed is changed is displayed. Next, in step S17, it is determined whether the dial 7 has been rotated. If negative, the process returns to step S15, and if positive, the process proceeds to step S18. In step S18, the shutter speed setting range is changed from the current state to another state. Then, the process returns to step S15. If the shutter speed setting range change mode switch 9 is off in step S15, this process ends.

The shutter speed setting range is set and identified based on the shutter speed setting range flag assigned to the rewritable storage area in the control circuit 1 of the camera. For example, the flag is 0 when the first shutter speed setting range is set in the shutter speed setting range changing mode, and 1 when the second shutter speed setting range is set. In this way, the shutter speed setting range is from 1 second to 1/8000 seconds and the first shutter speed setting range of the valve is from 30 seconds to 1/8.
000 seconds and the second shutter speed setting range of the valve can be set in two ways. The selection status of the shutter speed setting range is displayed on the display device 8.

FIG. 4 is a flow chart for explaining the shutter speed setting processing procedure in the first embodiment. For example, when the dial 7 is operated to change the shutter speed of the camera after presetting the shutter priority mode, the rotation direction is determined in step S1.
When the dial 7 is operated so as to set the shutter speed to the low speed side, step S1 is affirmed and the process proceeds to step S8. In step S8, it is determined whether the shutter speed range setting flag is 1. If it is determined that the flag is not 1, the process proceeds to step S9. That is, if the flag is determined to be 0 in step S8, it means that the first shutter speed setting range has been set, and therefore 1 second to 1/8.
A shutter speed within the first shutter speed setting range of 000 seconds can be set. Therefore, step S
At 9, the first low speed limit value of 1 second is set as the low speed limit value, and then the process proceeds to step S11.

On the other hand, if the flag is determined to be 1 in step S8, the process proceeds to step S10. In this case, since the second shutter speed setting range is set,
The shutter speed within the second shutter speed setting range of 30 seconds to 1/8000 seconds can be set. Therefore, in step S10, the second low speed limit value of 30 seconds is set as the low speed limit value, and then step S1 is performed.
Go to 1.

In step S11, the shutter speed currently set in the camera is compared with the low speed limit value set in steps S9 and S10. If the shutter speed, which is the low speed limit value, is not reached, step S1
At 2, set the shutter speed one step slower. If it is determined that the shutter speed is the low speed limit value, step S
At 13, the shutter speed is set to the valve. When the processes of steps S12 and S13 are completed, the process of FIG. 4 is completed.

On the other hand, if it is determined in step S1 that the dial 7 has been operated so that the shutter speed is set to the high speed side, the process proceeds to step S2. In step S2, it is determined whether or not the current shutter speed is the valve. If it is determined to be a valve, it is determined in step S3 whether or not the shutter speed setting range flag is 1, and if it is 1, the shutter speed is set to 30 seconds which is the low speed limit value of the second shutter speed setting range in step S4. If it is 0, in step S5, 1 second, which is the low speed limit value of the first shutter speed setting range, is set as the shutter speed. When step S4 and step S5 are completed, the process of FIG. 4 is completed.

When it is determined in step S2 that the current shutter speed is not the valve, the process proceeds to step S6,
It is determined whether or not the current shutter speed is the limit value on the high speed side. If it is determined that it is not the high speed side limit value, the process proceeds to step S7, the shutter speed is set to the one higher speed side, and this processing is ended. If it is determined to be the high speed limit value, the process is terminated without changing the shutter speed.

-Second Embodiment- Next, a second embodiment of the camera according to the present invention will be described. In the second embodiment, the low speed side limit value can be changed, and the limit value is stored as, for example, 1-byte information. If you want to set the low speed limit value to 30 seconds, <FB
If h> 1 second is desired, <00h> is stored and set.

FIG. 5 is a flow chart for changing and setting the low speed limit value. This flow chart is started when the shutter speed setting range changing mode switch 9 is turned on. In step S21, the state of the shutter speed setting range change mode switch is checked again. When this switch is on, the process proceeds to step S22, and the shutter speed setting range changing mode is entered. Here, for example, a display indicating that the setting range of the shutter speed is changed is displayed. Next, in step S23, it is determined in which direction the dial 7 has been rotated. If rotated in the forward direction, the process proceeds to step S24. In step S24, it is determined whether or not the current value of the low speed limit value is the longest second, for example, 30 seconds if the setting of 1 to 30 seconds is possible, and if not, the process proceeds to step S25.
In step S25, the low speed limit value is lowered to the low speed side by one step.
Then, the process proceeds to step S28. On the other hand, step S24
If it is determined that the maximum time has already been reached, the process proceeds to step S28. If it is not determined in step S23 that the dial has been rotated in the normal direction, step S23
Proceed to 26. In step S26, it is determined whether or not the current value of the low speed limit value is the shortest second, for example, 1 second when the setting of 1 to 30 seconds is possible, and if not, the process proceeds to step S27. In step S27, the low speed side limit value is increased by one step to the high speed side. Then, the process proceeds to step S28. On the other hand, if it is determined in step S26 that the shortest time has already come, the process proceeds to step S28. In step S28, the low speed side limit value is stored. Then, the process returns to step S21. If the shutter speed setting range changing mode switch 9 is turned on in step S21, the same processing is repeated, and if it is off, this processing is ended.

The shutter speed setting processing procedure of the second embodiment will be described with reference to the flow chart of FIG. In the flowchart of FIG. 6, processing steps similar to those in FIG. 4 are designated by the same reference numerals, and differences will be mainly described. In step S31, the low speed limit value set as described above is read. When it is determined in step S1 that the rotating direction of the dial 7 is the low speed side, the process proceeds to step S32, and it is determined whether or not the current set shutter speed is the valve. When it is determined that the valve is not the valve, in step S11, the low speed limit value read in step S21 is compared with the currently set shutter speed, and it is determined that the currently set shutter speed is not the low speed limit value. Then, the process proceeds to step S12, and the shutter speed is set to the lower speed side by one step. If it is determined in step S11 that the currently set shutter speed is the low speed limit value, the shutter speed is set to the valve in step S13. When steps S12 and S13 are executed, this process ends.

When it is determined in step S1 that the dial 7 has been operated so that the shutter speed is set to the high speed side, the process proceeds to step S2, and it is determined whether or not the currently set shutter speed is a valve. If it is determined to be a valve, the process proceeds to step S33, and the current shutter speed is reset to the preset low speed limit value. If it is determined in step S2 that the valve is not a valve, the process proceeds to step S6.
If it is determined in step S6 that the currently set shutter speed is not the high-speed limit value, the process proceeds to step S7, the shutter speed is reset to the one-step high speed side, and the process ends. If it is determined in step S6 that the current shutter speed is the high speed limit value, the shutter speed setting process is terminated without doing anything.

In the second embodiment, since the low speed side limit value can be arbitrarily set, it is possible to set the limit value to, for example, about several tens of minutes so that a long-time exposure shooting is performed in the manual exposure mode at night. When shooting with unknown exposure, it is possible to easily set a long exposure time without troublesome operations such as bulb shooting using a conventional cable release and time setting with a timer. Furthermore, with a camera that has an auto-bracketing function that automatically changes the exposure, you can shoot while automatically changing the exposure even in the range of several minutes to tens of minutes, so you can use it even when shooting is not possible at night. You can easily shoot with a high probability of matching. And even with such a high-performance camera, 1 second to 1/8
If the low speed limit value is set to 1 second during the normal shooting of 000 seconds, the operability when setting the shutter speed is not deteriorated.

-Third Embodiment- In the above first and second embodiments, the shutter speed is set by the same processing procedure whether the exposure mode is the shutter priority mode or the manual mode. However, the first shutter speed setting range is, for example, 1 second to
1/8000 seconds, the second shutter speed setting range is 3
When set to 0 second to 1/8000 second, if the second shutter speed setting range is selected in the shutter priority mode, the photometric limit is reached, and the operating range is outside the automatic exposure, and it may not be possible to shoot. Therefore, in the third embodiment, it is determined whether the exposure mode is the manual mode or the shutter priority mode, and if the exposure mode is the shutter priority mode, only the first shutter speed setting range can be selected, and the operation range is outside the automatic exposure range. Prevent that.

FIG. 7 shows a flowchart for changing the shutter speed setting range according to the third embodiment. The same parts as those in FIG. 3 are designated by the same reference numerals, and the differences are mainly described. In step S41, it is determined whether or not the shutter priority mode is set. If the shutter priority mode is set, the first shutter speed setting range is changed in step S42. When not in the shutter priority mode, that is, in the manual mode, steps S15 to S18 are executed as described above.

FIG. 8 is a flow chart of the shutter speed setting processing procedure in the third embodiment. The same parts as those in FIG. 4 are designated by the same reference numerals, and the differences will be mainly described.
When it is determined in step S1 of FIG. 8 that the dial 7 has been operated to the low speed side, it is determined in step S51 whether the exposure mode is the shutter priority mode or the manual mode. If the shutter priority mode is determined, step S8
Skip to step S9 and proceed to step S9 to set the first low speed limit value of 1 second as the low speed limit value. When it is determined in step S51 that the mode is the manual mode, if the flag is 1 in step S8, the second low speed limit value is set as the low speed limit value,
If the flag is 0, the first low speed limit is set in step S
Set with 9 and 10.

If it is determined in step S11 that the currently set shutter speed is the low speed limit value, the flow advances to step S53 to determine whether or not the shutter priority mode is set. This process ends without changing the. If the manual mode is determined in step S53, the valve is set as the shutter speed in step S13.

As a result, setting of a low speed limit value outside the operating range of automatic exposure is prohibited, and shooting in the shutter priority mode is appropriately performed. That is, the low speed limit value is 3
Even if the second shutter speed setting range of 0 seconds is set, the low speed limit value is limited to 1 second, which is the low speed limit value of the first shutter speed setting range, whereby shooting in shutter priority mode is performed. At the time of performing, it is possible to reduce the possibility that photography cannot be performed due to the limit of photometry.

If it is determined in step S1 that the dial 7 has been operated to the high speed side, it is determined in step S52 whether the exposure mode is the shutter priority mode or the manual mode. If it is determined that the shutter priority mode is selected, steps S2 to S5 are skipped and the process proceeds to step S6. If the manual mode is determined in step S32, steps S2 to S5 are executed in the same manner as described above. That is, if the mode is the manual mode and it is determined that the valve is a valve, as described above, if the flag is 1 in step S3, the second low speed limit value of 30 seconds is set as the shutter speed, and if the flag is 0, In step S5, 1 second, which is the first low speed limit value, is set as the shutter speed in step S5. Also in this case, the setting of the low-speed limit value outside the operating range of the automatic exposure is prohibited, and the shooting in the shutter priority mode is appropriately performed.

-Fourth Embodiment- In the first and second embodiments described above, only the low speed limit value can be changed as desired. In the fourth embodiment, the first to fourth shutter speed setting ranges are provided in advance so that the high speed limit value can be changed. Here, the respective shutter speed setting ranges are also shown in FIG. 9 and are as follows. First shutter speed setting range: valve and 1 second ~
1/8000 seconds Second shutter speed setting range: valve, 30 seconds to 1/8000 seconds Third shutter speed setting range: valve, 1 second to
1/2000 seconds Fourth shutter speed setting range: 30 seconds to 1/2000 seconds with valve

In the case of this embodiment, the high and low speed limit value changing switches 10 and 11 are provided as shown in FIG. 1, and based on the on / off state of the switches, according to the flow chart shown in FIG. The high and low speed limit values are set by the same processing as the value setting processing. Figure 5
The same parts as those in FIG. In FIG. 10, the switch 10,
It is determined whether the low speed limit value is changed or the high speed limit value is changed according to the state of No. 11, and if this step S45 is affirmative, steps S23 to S28 are executed, and if not, step S4.
In steps 6 and 47, the high speed limit value is stored by the same processing.

In this case, a 1-byte high / low speed limit value setting flag is provided in the control circuit 1, and the high / low speed limit value setting flag is set to 0.
The shutter speed setting range can be identified by using the 1st bit and the 1st bit. For example, when the first low speed side limit of 1 second is set, the 0th bit is set to 0, and when the second low speed limit value of 30 seconds is set, the 0th bit is set to 1. When the first high-speed limit of 1/8000 seconds is set, the first bit is 0, and when the second high-speed limit value of 1/2000 seconds is set, the first bit is 1. To do.

FIG. 11 is a flowchart showing the procedure of the shutter speed setting process of the fourth embodiment. The same parts as those in FIG. 4 are designated by the same reference numerals, and the differences will be mainly described.
If it is determined in step S1 that the shutter speed setting dial 7 has been operated to the low speed side, it is determined in step S8A whether or not the 0 bit of the high / low speed limit value setting flag is 1, and 0
If so, the first low speed limit value is set as the low speed limit value in step S9, and if 1 is set, the second low speed limit value is set as the low speed limit value in step S10. If it is determined in step S1 that the shutter speed setting dial 7 has been operated to the high speed side, and if it is determined in step S2 that the shutter speed setting dial 7 is not a valve, it is determined in step S61 whether 1 bit of the high / low speed limit value flag is 1 or not. , 0, the first high speed limit value is set as the high speed limit value in step S63, and if 1 is set, the second high speed limit value is set as the high speed limit value in step S62. If it is determined in step S2 that the valve is a valve, if 1 bit of the high / low speed limit value flag is determined to be 1 in step S3A, the second low speed limit value is set as the shutter speed in step S4, and the high / low speed is set in step S3A. If 1 bit of the limit value flag is determined to be 0, step S
At 5, the first low speed limit value is set as the shutter speed. The other processing procedure is similar to that of the first embodiment.

In the fourth embodiment, the first to fourth shutter speed setting ranges can be arbitrarily selected.

FIG. 12 shows another example of the setting range of the shutter speed. With a normal camera, you can only set the time up to about 30 seconds, but in this example, 68 minutes 1
The exposure time is extended to 6 seconds, and in the first shutter speed setting range, 30 seconds to 1/8000 seconds and a valve,
68 minutes 16 seconds to 1 in the second shutter speed setting range
/ 8000 seconds and valve. By selecting the shutter speed setting range in this way, the normal 1 second to
It is possible to set a setting range of 1/8000 and a setting range of a long exposure time up to about 1 hour, which is advantageous for night view shooting to 1/8000 seconds, and at this time, the first shutter speed setting range is set during normal shooting. If is set, the shutter speed setting operation will not be complicated. As described in the previous embodiment, the limit on the long time side that determines the second shutter speed setting range may be set to another value such as 1 second.

In the above description, the operation member such as the switch for changing the low speed limit value or the high speed limit value is provided on the camera body, but this kind of switch may be provided on various camera accessory sides. Further, a camera having a terminal connected to the electronic notebook may be configured to input the low speed limit value or the high speed limit value from the electronic notebook side.

[0035]

As described above, according to the present invention, the shutter speed setting range which is normally used and the shutter speed setting range which is used at the time of special photographing such as nighttime can be selectively used. The shutter speed can be set within a narrow range to reduce the number of setting operations, and the shutter speed setting range can be widened only when performing special shooting, which improves operability. This is particularly effective when the shutter speed setting step is not 1 step as in the present embodiment but 1/3 step.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control system in an embodiment of a camera according to the present invention.

FIG. 2 is a diagram showing two types of shutter speed setting ranges in the first embodiment.

FIG. 3 is a flowchart showing an example of a shutter speed setting range changing procedure according to the first embodiment.

FIG. 4 is a flowchart showing an example of a shutter speed setting procedure according to the first embodiment.

FIG. 5 is a flowchart showing an example of a shutter speed setting range changing procedure according to the second embodiment.

FIG. 6 is a flowchart showing an example of a shutter speed setting procedure according to the second embodiment.

FIG. 7 is a flowchart showing an example of a shutter speed setting range changing procedure according to the third embodiment.

FIG. 8 is a flowchart showing an example of a shutter speed setting procedure according to the third embodiment.

FIG. 9 is a diagram showing four types of shutter speed setting ranges in the fourth embodiment.

FIG. 10 is a flowchart showing an example of a shutter speed setting range changing procedure according to the fourth embodiment.

FIG. 11 is a flowchart showing an example of a shutter speed setting procedure according to the fourth embodiment.

FIG. 12 is a diagram showing another example of the shutter speed setting range.

[Explanation of symbols] 1 control circuit 6 exposure mode switch 7 dial 9 shutter speed setting range change mode switch 10 low speed limit value change switch 11 high and low speed limit value change switch

Claims (6)

[Claims] 1. In a camera capable of photographing at a shutter speed between a low speed limit value and a high speed limit value, a first shutter speed setting range set between the low speed limit value and the high speed limit value, and First
Selecting means for selecting one of the second shutter speed setting ranges different from the shutter speed setting range of, and setting means for setting the shutter speed defined in the shutter speed setting range selected by the selecting means. A camera capable of changing a shutter speed setting range, comprising: 2. The camera according to claim 1, wherein the first shutter speed setting range and the second shutter speed setting range are fixed. 3. The camera according to claim 1, further comprising changing means for changing a low speed limit value and / or a high speed limit value of the first and second shutter speed setting ranges. A camera whose range can be changed. 4. The camera according to claim 1, wherein a mode setting means for setting any one of a plurality of exposure modes and one of the first and second shutter speed setting ranges are provided for the plurality of exposure modes. A camera capable of changing a shutter speed setting range, further comprising control means for making selection possible only when a specific exposure mode is set. 5. The camera according to claim 4, wherein the exposure mode includes at least a manual mode in which a shutter speed and an aperture value are manually set, and the control means selects one of the first and second shutter speed setting ranges. A camera capable of changing a shutter speed setting range is characterized in that one of the shutter speeds including a longer shutter speed is selected only when the manual mode is set. 6. A camera capable of photographing at a shutter speed between a low speed limit value and a high speed limit value, and a changing means for arbitrarily changing a shutter speed setting range between the low speed limit value and the high speed limit value. A camera capable of changing a shutter speed setting range, comprising: a setting unit for setting the shutter speed to any one of the shutter speed setting ranges set by the changing unit.