JPH0740107B2 - Camera shooting information setting device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing information setting device of a camera, and more particularly to selecting a mode relating to various kinds of photographing information and changing photographing information related to the selected mode step by step. The present invention relates to a photographing information setting device of a camera that can be used.

(Background of the Invention) Conventionally, a mode related to various kinds of photographing information, for example, an exposure control mode, a drive mode, a film sensitivity setting mode, an exposure correction mode, etc., is selected by a first operation member called a mode key and is selected. There is known a photographing information setting device for a camera in which photographing information regarding a different mode is changed stepwise by a second operation member called a shift key.

By the way, in this type of photographing information setting device, as the exposure control mode, for example, an aperture priority mode, a shutter speed priority mode, a standard program mode, a high speed program mode and a low speed program mode are provided, and one of them is selected by the exposure control mode setting means. There are some that can be selected. When a standard program is selected in such an exposure control mode, it may be desired to intentionally change the combination condition of the aperture and the shutter speed that provides the proper exposure, for example, to the high speed program mode or the low speed program mode. In the camera equipped with the photographing information setting device, by pressing the shift key while pressing and holding the mode key, a desired exposure control mode, for example, a low speed in which the shutter speed is controlled on the lower speed side by the combination of the shutter speed and the aperture. Need to change to program mode. However, in such an operation, it is necessary to simultaneously press the mode key and the shift key, which results in poor operability and lack of agility.

When changing the combination condition of the aperture and the shutter speed after selecting the standard program as described above, some other conventional photographing information setting devices have a so-called program shift function. This is because, by pressing the operation member such as the above-mentioned shift key or a separately provided program shift key, the aperture and shutter speed are respectively set from the combination of the aperture and shutter speed set on the program diagram in the standard program mode. By shifting the setting by 1EV, the desired proper exposure is obtained. With such a program shift key, when changing the combination of the aperture and shutter speed one after another, those changed values that are continuously changed every moment can be confirmed. , For example
Only 1EV is changed, and when aiming for a special depiction effect, for example, when shooting a moving subject with stillness as much as possible, or when you want to set the aperture to the maximum open side, in other words, to obtain high-speed program mode shooting conditions. In this case, the above-described program shift key must be repeatedly pressed and operated, which is not only complicated but also lacks promptness. Also,
The same problem occurs when it is desired to capture the entire range sharply, when a low-speed shutter is used, in other words, when a low-speed program mode shooting condition is obtained.

(Object of the Invention) The present invention solves these problems and provides a photographing information setting device of a camera capable of promptly selecting one of a plurality of preset program exposure control modes by a simple operation. It is an object.

(Summary of the Invention) First operation means for allowing a selection of an exposure mode and a plurality of program exposure modes when the exposure mode selection is enabled by the first operation means In a photographing information setting device of a camera having a second operation unit capable of selecting one of a plurality of exposure modes, the exposure mode selection is permitted by the first operation unit. Even if not
When any one of the plurality of program exposure modes is selected, a control unit is provided that enables selection of another program exposure mode by operating the second operation unit. To do.

(Embodiment) FIG. 1 shows a camera 1 equipped with an embodiment of a photographing information setting device according to the present invention. In FIG. 1, 11 is a camera body main body, 12 is a photographing lens, 13 is a grip portion, 14 is an upper cover, a release button 2 is provided on the upper surface of the grip portion 13, and a mode key is provided on the upper cover 14. The group 3, the shift key group 4 constituting the second operation means, and the information display device 5 made of a liquid crystal or the like for displaying photographing information set by the key operation of the mode key group 3 and the shift key group 4 are provided. There is.

The mode key group 3 includes a film number setting mode selection key (hereinafter, EX key) 31 of a used film, a sensitivity setting mode selection key (hereinafter, an ISO key) 32 of a film used, and an exposure compensation setting mode selection key ( Hereinafter, +/- key) 33 and the first
Exposure control mode selection key 34 (hereinafter, MODE key) and continuous 1-frame mode selection key (hereinafter, DR key) 35 for selecting either continuous shooting or single-frame shooting is doing. That is, it is possible to select and set any one of these plural kinds of photographing information modes by operating the keys 31 to 35.

The shift key group 4 is provided near the release button 2 as shown in FIG. 1, and has an up (UP) key 41 and a down (DN) key 42.
And.

The exposure control mode in this embodiment includes an aperture priority mode, a shutter speed priority mode, a standard program mode, a high speed program mode, a low speed program mode and a manual mode. Therefore, the camera of this embodiment has three program exposure controls. It can be said that it is a multi-program machine having.

FIG. 2 shows each program diagram of these three program exposure controls. In the figure, the program diagram shown by the solid line shows the combination of the aperture and shutter speed in the standard program mode, and by the one-dot chain line and the broken line. The generated program diagrams show combinations of aperture and shutter speed in the high speed program mode and the low speed program mode, respectively.

FIG. 3 is a block diagram showing a control circuit of the photographing information setting device in the present embodiment, in which the control circuit 6 constitutes a control means. In the figure, a mode key group 3 is formed.
EX key 31, ISO key 32, +/- key 33 and DR key 35 are
Corresponding EX counter 61, ISO counter 62, +/-
It is connected to the counter 63 and the DR counter 65. MODE
The key 34 is connected to the exposure control mode selection circuit 66, and the mode selection circuit 66 is bidirectionally connected to the MODE counter 64.

The shift key group 4 including the up key 41 and the down key 42 includes an EX counter 61, an ISO counter 62, a +/- counter 63,
It is connected to the DR counter 65 and the mode selection circuit 66. Each counter is connected to the display switching circuit 7 to which the display device 5 is connected, and the MODE counter for exposure control is used.
The 64, +/- counter 63 and the ISO counter 62 are connected to the arithmetic circuit 8 to which the photometric circuit 9 and the exposure control circuit 10 are connected.

The MODE counter 64 is composed of a ring counter, for example, 0
The above-mentioned aperture priority mode, shutter speed priority mode, which constitutes the exposure control mode, can be repeatedly counted
A standard program mode, a high speed program mode, a low speed program mode and a manual mode are assigned corresponding to counter values 0 to 5, for example. In this example,
Count values 0 to 5 are assigned in the order of aperture priority mode, shutter speed priority mode, low speed program mode, standard program mode, high speed program mode, and manual mode.

Further, the other EX counter 61, ISO counter 62, +/- counter 63, and DR counter 65 are also configured to count from 0 to a predetermined value according to the counter control signal input from the shift key group 4, and each count value Is the desired number,
For example, it is assigned to the ISO value and the number of frames to be photographed.

The mode selection circuit 66 includes the shift key group 4 and the MODE key 34.
And a counter control signal corresponding to the input signals from the MODE counter 64 and the MODE counter 64. That is, when the up signal from the up key 41 of the shift key group 4 and the signal from the MODE key 34 are received at the same time, the counter 64
Counter control signal (“+1”)
When a down signal from the down key 42 and a signal from the MODE key 34 are simultaneously received, a counter control signal ("-1" step) that causes the counter 64 to step "-1". It is output to the counter 64.

When the count signal indicating the counter value in the MODE counter 64 indicates the value assigned to the standard program mode, the high speed program mode or the low speed program mode, the up signal from the up key 41 or the down key 42 Even when only the down signal of is input, the selection circuit 66 outputs the counter control signal for advancing the MODE counter 64 to "+1" step or "-1" step to the counter 64, which is low speed → standard → high speed or high speed. The setting can be changed in order of → standard → low speed.

In this embodiment, only the mode can be changed between the standard, high speed and low speed program modes by operating the shift key group 4, and the selection circuit 66 determines that the count signal from the counter 64 is in the high speed program mode. In this case, even if the up signal from the up key 41 is received, the “+1” step signal is not output to the counter 64, so the setting is changed from the high speed program mode to any other exposure control mode than the program exposure control mode. Not done. Similarly, when the selection circuit 66 determines that the count signal from the counter 64 is in the low-speed program mode, even if the down signal from the down key 42 is received, the counter 64 is incremented by "-1". Since no signal is output, the setting is not changed from the low speed program mode to any other exposure control mode other than the program exposure control mode. Even if the high-speed or low-speed program mode is set, if the MODE key 34 and the up or down signal from the shift key group 4 are simultaneously received, the up signal or the down signal is output as described above. In response, a "+1" step signal or a "-1" step signal is output to the counter 64, so that the setting is changed from the high speed program mode or the low speed program mode to an exposure control mode other than the program exposure control.

The photometric circuit 9 A / D-converts the photometric output according to the subject brightness and outputs it to the arithmetic circuit 8. The arithmetic circuit 8 is an ISO counter 6
2, the count signal from the +/- counter 63 and the MODE counter 64 and the photometric output signal from the photometric circuit 9 are input,
The exposure information of the shutter speed and the aperture value according to the set exposure control mode is calculated and output to the display switching circuit 7 and the exposure control circuit 10. The exposure control circuit 10 performs predetermined exposure control according to the exposure information from the arithmetic circuit 8 and the selected exposure control mode, and controls the shutter and diaphragm by electromagnetic means as is well known. Display switching circuit 7
Receives the count signals from the counters 61 to 65 and the exposure information from the arithmetic circuit 8 and switches and selects the various kinds of photographing information.

The display device 5 includes a display decoder, a driver, and a display device such as a visible liquid crystal or a light emitting diode, and displays the exposure information selected by the display switching circuit 7 by lighting or blinking. In the present embodiment, for example, as shown in FIG. 4, the display device 5 has display parts 51, 52 and 53, and the display part 51 has six mark symbols A, S, P for the exposure control modes. _N , P _H , P _L and M are shown in white, and the symbol mark of the selected mode is displayed in black. The symbol mark A is the aperture priority mode, S is the shutter speed priority mode, P _N is the standard program mode,
P _H denotes high speed program mode, P _L is slow program mode, M is the manual mode, respectively. Further, the shutter speed or the ISO sensitivity is displayed on the display unit 52, which is composed of, for example, 7 segments, and the aperture value is displayed on the display unit 53.

In FIG. 3 again, reference numeral 67 denotes a memory, and the memory 67 is pre-written with a processing procedure for photographing information setting control, which will be described later, and a program diagram for the above-described program exposure control.

The operation of the exposure control mode selection circuit 66 of this embodiment will be described based on the flowchart shown in FIG.

When this flowchart is started by turning on the power, the control circuit 6 and other elements are initialized in step S1. By this initialization, the display device 5 displays the number of shots, the number of shootable frames, the symbol mark P _N indicating the standard program mode, the symbol mark indicating the setting of one frame shooting, the symbol mark indicating the presence or absence of exposure correction, and the like. .

When the process proceeds to step S2, the setting mode is determined based on the count value from the MODE counter 64. If the mode is not the program exposure control mode, it is determined at step S3 whether or not the MODE key 34 is turned on, and the determination is affirmative. If it is determined, the process proceeds to step S4. If a negative determination is made, the operation proceeds to the step of determining the operation of another mode key.

In step S4, it is determined whether any one of the shift key groups 4 is turned on. If an affirmative determination is made, the process proceeds to step S5, and it is determined whether or not the up key 41 is turned on. If an affirmative decision is made in step S5, in step S6, "+1" is stored in the memory CP in order to advance the MODE counter 64 by "+1" by the counter control signal, and if a negative decision is made in step S5, then step S7 At the MODE counter
"-1" is stored in the memory CP in order to advance 64 by "-1". Then, in step S8, when the value of the memory CP is "+1", a "+1" step signal is supplied to the MODE counter 64, and when it is "-1," a "-1" step signal is supplied. To do.

On the other hand, if an affirmative decision is made at step S2, then the processing advances to step S9, at which it is decided whether or not the MODE key 34 is turned on. If an affirmative determination is made, steps S4 to S8 are sequentially executed as described above. If a negative decision is made in step S9, the operation proceeds to step S10 and it is decided whether or not any one of the shift key groups 4 is turned on. If a negative determination is made, the operation proceeds to the step of determining the operation of another mode key.

When the determination in step S10 is affirmative, the process proceeds to step S11. In step S11, it is determined whether or not the up key 41 is turned on, and if a positive determination is made, the process proceeds to step S12,
Whether or not the currently set exposure control program mode is the high speed program mode is determined based on the count signal from the MODE counter 64. If a positive determination is made, step S9
If the determination is negative, the process proceeds to step S13 to store "+1" in the memory CP described above.

If a negative determination is made in step S11, step S
Proceeding to step 14, it is determined whether or not the currently set exposure control program mode is the low speed program mode in the same manner as described above. If an affirmative decision is made, the process returns to step S9. "-1" is stored in. When steps S13 and S15 are executed, step S8
Then, the MODE counter 64 is controlled by generating a counter control signal according to the contents of the memory CP.

That is, according to this processing procedure, when it is desired to change the setting of the exposure control mode, the up key 41 or the down key 42 of the shift key group 4 is pressed while the MODE key 34 of the mode key group 3 is being pressed and held, and sequentially. The symbol mark of the exposure control mode switched and displayed on the display device 5 is confirmed, and when the symbol mark indicating the desired exposure control mode is displayed, if the pressing operation of the up key 41 or the down key 42 is stopped, the exposure is changed. The control mode is set.

As described above, the exposure control mode includes the aperture priority mode, the shutter speed priority mode, the low speed program mode, the standard program mode, the high speed program mode and the manual mode, and pressing the up key 41 or the down key 42 together with the MODE key 34. Thus, the desired exposure control mode is selected by sequentially or backward feeding the symbol mark indicating the exposure control mode displayed on the display device 5 in the above-described mode order.

Further, according to the flowchart of this embodiment, FIG.
When the standard program mode is selected and displayed as in (Subject brightness EV12, shutter speed 125, aperture value F5.6;
However, to change the exposure control mode to the high-speed program mode to the ISO value 100), the up key 41 of the shift key group 4 may be pressed without touching the MODE key 34. FIG. 6B shows a case where the exposure control mode is changed from the standard program mode to the high speed program mode by such an operation. Here, the symbol mark P _H on the display unit 51 indicates the high speed program mode, and the display unit 52
`` 500 '' indicates the shutter speed, and `` F2.
"8" indicates the aperture value.

Further, when the down key 42 is pressed once after the high speed program mode is set, the display returns to the original standard program mode and the display device 5 displays as shown in FIG. 6 (a). Furthermore, when the down key 42 is pressed while the standard program mode is set, the setting is changed to the low speed program mode, and the display device 5 becomes as shown in FIG. 6 (c). Here, the symbol mark P _L on the display unit 51 indicates the low speed program mode, “60” on the display unit 52 indicates the shutter speed, and “F8” on the display unit 53 indicates the aperture value.

That is, in this embodiment, under the action of the exposure control mode selection circuit 66, when the normal mode is changed, the MODE key 34
By operating both and one of the shift keys in parallel, the exposure control mode is changed to ASP _L P _N P _H M
Only when one of the program exposure modes is already set and the setting is changed to A, the setting can be changed to P _L → P _N → P _H by operating only one of the shift keys. Further, in this embodiment, it is possible to change between the three program modes by operating only one of the shift keys, but it is not possible to change from the program mode to the non-program mode.

Although not described above, when changing the setting of the in-mode shooting information in shooting information modes other than the exposure control mode, press the up key or shift key while pressing and holding the mode key to be changed. By doing so, it is possible to change the settings such as numerical values in each mode.

In the above description, the mode is not changed between the program modes in both the up key operation when the high speed program mode is set and the down key operation when the low speed program mode is set. However, the present invention is not limited to these, and the operation may be changed to the low speed program mode and the high speed program mode, respectively. That is, a ring counter only between the program modes may be configured like P _L P _N P _H P _L P _N.

Further, the program mode is not limited to standard, high speed and low speed, and the present invention can be applied to a camera having a plurality of program diagrams in advance.

As described above, according to the present invention, when the set exposure control mode is the program exposure control mode, another program exposure control can be performed only by operating the second operating means including a shift key or the like. Since it is possible to change the setting to the mode,
By changing the image capturing intention or the like, it is possible to perform an extremely easy and quick operation between program modes, for example, changing from the standard program mode to the high speed program mode.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera provided with an embodiment of a photographing information setting device according to the present invention, and FIG. 2 is preset for EV values for three types of program modes according to an embodiment of the present invention. FIG. 3 is a program diagram showing a combination of shutter speed and aperture, FIG. 3 is a block diagram showing a control circuit in one embodiment of the present invention, FIG. 4 is a diagram showing an example of the display device, and FIG. 6 (a), 6 (b) and 6 (c) are flowcharts showing the processing procedure in one embodiment of the invention, and are explanatory views of the display contents of the display device in one embodiment of the present invention. 1: Camera, 2: Release button 3: Mode key group, 4: Shift key group 5: Information display device, 6: Control circuit 34: MODE key, 41: Up key 42: Down key, 64: MODE counter 66: Selection circuit

Claims (1)

[Claims] 1. A first operating means for putting a selection of an exposure mode into a permitting state, and a plurality of program exposure modes when the exposure mode selection is made into a permitting state by the first operating means. In a photographing information setting device of a camera having a second operation unit capable of selecting any one of a plurality of exposure modes, the exposure mode selection is allowed by the first operation unit. Even if not, when any one of the plurality of program exposure modes is selected, a control unit that enables selection of another program exposure mode by operating the second operation unit is provided. A shooting information setting device for a camera, comprising: