JP2940112B2 - Camera with virtual wide function - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a virtual wide function for shortening the focal length of a taking lens as compared with that during exposure control, other than during exposure control, and a power zoom function. It is suitable for AF single-lens reflex cameras with interchangeable lenses and AF compact cameras with power zoom function.

[Prior art] A shooting lens with a power zoom function automatically zooms to a wide angle side by a predetermined amount from an angle of view actually taken other than during exposure control, to make it easier to grasp the situation around the subject. Alternatively, an effect of pseudo-expanding the distance range in which the focus can be detected can be obtained. Then, it is possible to automatically zoom to the telephoto side immediately before the release and shoot at the original angle of view. This is called a virtual wide function.

[Problem to be Solved by the Invention] When using the virtual wide function as described above, if the focal length of the photographing lens is originally set near the shortest focal length, the visual field is widened by the virtual wide function. In this case, zooming to the wide angle side by a predetermined amount cannot be performed.

The present invention has been made in view of such a point,
The purpose is to warn the photographer when the virtual wide function cannot be set in a camera that has a virtual wide function that shortens the focal length of the taking lens as compared to that during exposure control, other than during exposure control. Is to be added.

[Means for Solving the Problems] In a camera with a virtual wide function according to the present invention, in order to solve the above problems, as shown in FIG. Viewfinder 2 that forms a field of view with an angle of view corresponding to the focal length of shooting lens 1
Operating means 3 for setting a virtual wide function for setting the focal length of the photographing lens 1 shorter than at the time of exposure control and for widening the field of view of the viewfinder 2 other than at the time of exposure control; Control means 4 for responding to shorten the focal length of the photographing lens 1 and to return the focal length to the original during exposure control, and to set the actual photographing field frame when a field of view widened by the virtual wide function is set. Display means 5 for displaying, first output means 6 for outputting information on the current focal length f of the photographic lens 1, and shortest focal length of the photographic lens 1
second output means 7 for outputting information of fmin, determining means 8 for determining whether or not the virtual wide function can be set based on the outputs of the first and second output means 6 and 7, and operating means 3 is provided, and a warning means 9 for giving a warning when the determination means 8 determines that the setting of the virtual wide function is impossible is provided.

In addition, when a certain time has elapsed after the start of the warning, when there is a re-operation for setting the virtual wide function, or
Canceling the warning when the virtual wide function can be set by zooming up can prevent unnecessary warnings, which is convenient.

[Operation] Hereinafter, the operation of the present invention will be described with reference to FIG. The taking lens 1 has a power zoom function, and can electrically control the increase and decrease of the focal length. The finder 2 forms a field of view having an angle of view corresponding to the focal length of the taking lens 1. As the focal length becomes shorter, the angle of view becomes wider, and the situation around the subject becomes easier to grasp. Further, since the depth of focus is increased, the distance range in which the focus can be detected can be pseudo-expanded. Therefore, the means 3 to 5 realize a virtual wide function of setting the focal length of the photographing lens 1 shorter than at the time of the exposure control and making the field of view of the viewfinder 2 wider than at the time of the exposure control. When the operating means 3 is operated, the focal length of the photographing lens 1 is controlled under the control of the control means 4 in response to the operation. Thereby, the field of view of the viewfinder 2 is widened. In addition, the display unit 5 displays the actual shooting field frame within the field of view of the viewfinder 2. At the time of exposure control, the focal length of the photographing lens 1 is automatically returned under the control of the control means 4.

By the way, when the current focal length f is close to the shortest focal length fmin, it may not be possible to widen the visual field of the finder 2 by a predetermined amount by the virtual wide function. Therefore, the first output means 6 outputs the current focal length f of the photographic lens 1 and the second output means 7 outputs the shortest focal length fmin of the photographic lens 1. It is determined whether the virtual wide function can be set. Then, when the operation means 3 is operated,
When the determining means 8 determines that the setting of the virtual wide function is impossible, the warning means 9 issues a warning. Thereby, the photographer can know that the virtual wide function cannot be used.

Embodiment Hereinafter, as one embodiment of the present invention, a single-lens reflex camera system including an interchangeable lens will be described. FIG. 2 (a) shows the external structure of a camera body BD to which the present invention is applied, and FIG. 2 (b) shows the external structure of an interchangeable lens LE which is interchangeably mounted on the camera body BD. I have. Hereinafter, the names and functions of the respective units will be briefly described.

Reference numeral 11 denotes a slider for turning on the main switch. When the slider 11 is in the ON position, the camera body
The BD is operable, and when in the OFF position, the camera body BD is inoperable.

Reference numeral 12 denotes a release button, and when the first step is pressed, a shooting preparation switch S1, which will be described later, is turned on, and each operation of photometry and exposure calculation starts. In addition, a release switch S2 described later is turned on by pressing the second stage, and an exposure control operation is started.

Reference numeral 13 denotes an AE lock key, and AE lock is performed while this key is operated.

Reference numeral 14 denotes an on-body display unit, which displays a shutter speed, an aperture value, and the like. The display contents will be described later with reference to FIG. The display in the viewfinder will be described later with reference to FIG.

Reference numeral 15 denotes a mount lock pin. Interchangeable lens LE is mounted, if the mount lock state, lens mounting switch S _LE is turned OFF later, lens mounting switch S _LE when the other is ON.

Reference numeral 16 denotes an AF coupler, which is rotationally driven based on the rotation of an AF motor in the camera body BD.

Reference numeral 17 denotes a stop lever, which is used to stop down the stop of the interchangeable lens LE by the number of stop steps determined by the camera body BD.

Reference numeral 18 denotes a push switch for turning on / off the virtual wide function. Here, the virtual wide function means that the field of view in the viewfinder is made larger than the field of view actually taken by increasing the focal length of the taking lens by about 0.7 times to the wide angle side, and the original focal length is used at the time of shooting. Function. With the virtual wide function, the field of view in the viewfinder is approximately 14
Although the size is 0%, the field of view that is actually photographed is displayed by displaying the field frame on the liquid crystal. Hereinafter, the virtual wide is referred to as “V · wide”, “VWD”, or “VW”.

Reference numeral 19 denotes a P reset switch operated to initialize various modes.

Reference numeral 20 denotes an up switch key, and reference numeral 21 denotes a down switch key, which are operated to change the AE mode, set a shutter speed in P mode, a combination of aperture values, and set a shutter speed in S mode.

Reference numeral 22 denotes a switch key operated when changing the AE mode.

Reference numeral 23 denotes a self-mode setting switch key. The self-mode is set by operating the operation member 23 up to the arrow, and when the release switch S2 is turned on, a self-photographing operation starts.

Next, the names and functions of the components of the interchangeable lens LE will be described.

Reference numeral 24 denotes a release switch, which is a release button on the body side.
It has the same function as the pressing of the second step 12 and when this release switch 24 is pressed, a switch _SRE described later is turned on.

25 is a mount lock groove, 26 is an AF coupler, and 27 is a focusing lever. When the interchangeable lens LE is mounted on the camera body BD, the mount lock pin 15 of the camera body engages with the mount lock groove 25, and the convex portion of the AF coupler 16 on the body engages with the concave portion of the AF coupler 26 on the lens side. , On the body side
The rotation of the AF motor is transmitted to the lens side through the AF couplers 16 and 26, and the focus adjustment lens group moves to adjust the shooting distance. Further terminals J ₁ through J ₈ on the lens side is connected to the terminal J ₁₁ through J ₁₈ of the body side. Also, the refinement lever 17
Engages the aperture lever 27 on the lens side, and moves the aperture lever 17 on the body by the amount of movement of the aperture lever 17 on the lens side.
27 moves following, and the aperture opening is
Is controlled to a value corresponding to the movement amount of.

Reference numeral 80 denotes an operation ring, which is rotated to specify the direction and speed of the power zoom, and the driving direction of the zoom is set in the rotating direction, and the driving speed of the zoom is set according to the amount of rotation.

Next, a circuit configuration of the camera system will be described.

FIG. 3 is a circuit diagram of an internal circuit built in the camera body BD.

μC1 is an in-body microcomputer (hereinafter, referred to as “in-body microcomputer”) that controls the entire camera and performs various calculations.

AF _CT is a focus detection light receiving circuit, and a focus detection CCD
And a circuit for driving the CCD, and a circuit for processing the output of the CCD, performing A / D conversion, and supplying it to the microcomputer μC1 in the body.
It is connected to the microcomputer μC1 in the body via the data bus. The focus detection light receiving circuit AF _CT, information on the defocus amount of an object located in the ranging area is obtained.

LM is a photometric circuit provided in the finder optical path, and A / D converts the photometric value and supplies the result to the microcomputer μC1 in the body as luminance information.

DX is a film sensitivity reading circuit which reads the film sensitivity data provided in the film container and serially outputs the data to the microcomputer μC1 in the body.

DISPC inputs display data and display control signals from the microcomputer μC1 in the body, and displays the display section DISP _{I on the} top of the camera body.
(Display unit 14 in FIG. 2A), display unit DISP _{II in the} viewfinder and display unit DISP in the viewfinder
_III is a display control circuit for performing a predetermined display.

LE _CT is a lens in the circuit built in the interchangeable lens LE, supplies interchangeable lens specific information body microcomputer .mu.C1. This lens circuit LE _CT will also be described later in detail.

M1 is an AF motor, which drives a lens group for focus adjustment in the interchangeable lens via AF couplers 16 and 26.

MD1 is a motor drive circuit that drives the AF motor M1 based on focus detection information, and controls the forward rotation, reverse rotation, and stop by inputting a drive amount signal from the microcomputer μC1 in the body.

TV _CT is a shutter control circuit that controls the shutter based on a control signal from the microcomputer μC1 in the body.

AV _CT is an aperture control circuit for controlling the iris based on the control signal from the body microcomputer .mu.C1.

M2 is a motor for winding and rewinding the film and charging the exposure control mechanism. MD2 is motor M
2 is a motor drive circuit for driving the microcomputer 2 based on a command from the microcomputer μC1 in the body.

 Next, the configuration related to the power supply will be described.

 E1 is a battery serving as a power supply for the camera body BD.

Tr ₁ is a first power supply transistor that supplies power to a part of the circuit described above. Tr ₂ is a second power supply transistor for supplying power for driving the zoom motor in the lens, and has a MOS configuration.

DD is a DC / DC converter for stabilizing the voltage V _DD supplied to the microcomputer μC1 in the body, and the power control signal PW0
Operates when the signal is at the “High” level. V _DD is microcomputer μC1 in the body, circuit LE _{CT in} the lens, and film sensitivity reading circuit D
X is the operating power supply voltage of the display control circuit DISPC. V _CC1 focus detection light receiving circuit AF _CT, an operation power supply voltage of the light measuring circuit LM, is supplied through the feed transistor Tr ₁ from the power source battery E1 under control of the power supply control signal PW1. V _CC2 is the operating power supply voltage of the zoom motor in the lens, and the power control signal PW
It is supplied via the power supply transistor Tr ₂ at 2 under control from the power source battery E1. V _CC0 is the motor drive circuit MD1, shutter control circuit TV _CT , aperture control circuit AV _CT , motor drive circuit
Operating power supply voltage for MD2, supplied directly from power supply battery E1.

When the DC / DC converter DD stops operating, D1 to D3 apply a voltage lower than the voltage V _DD to the microcomputer μC1 in the body.
And a diode group for reducing power consumption. This low voltage is set to the lowest voltage at which the microcomputer μC1 in the body can operate. When the DC / DC converter DD stops operating, only the microcomputer μC1 in the body can operate.

GND1 is a ground line of low-power unit, between the lens and the body are connected through the terminal J _17, J _7. In the body, the analog section and the digital section need to be on separate ground lines, but are shown as a single line in the drawing.

GND2 is ground line of the large power unit, between the lens and the body are connected through the terminal J _18, J _8.

 Next, switches will be described.

The _SVWD is a _normally- open push switch for switching between enabling and disabling the virtual wide function, and is turned on when the above-described virtual wide function setting operation key 18 is pressed.

S1 is a shooting preparation switch which is turned on when the release button 12 is depressed at the first stage. When the switch S1 is turned on, an interrupt signal is input to an interrupt terminal INT1 of the microcomputer μC1 in the body, and preparatory operations necessary for photographing, such as photometry and AF operation, are performed.

S _M slider 11 for enabling the operation of the camera is ON
This is a main switch that is turned on when in the position and turned off when in the off position.

PG1 is a pulse generator for outputting a "Low" level of the pulse for each switch S _M is varying from OFF to ON to or OFF from ON. The output of the pulse generator PG1 is input as an interrupt signal to an interrupt terminal INT2 of the microcomputer μC1 in the body.

S2 is a release switch that is turned on when the release button 12 is pressed down in the second stage. When the switch S2 is turned on, a shooting operation is performed.

S3 is a mirror up switch that is turned on when the mirror up is completed, and is turned off when the shutter mechanism is charged and the mirror is down.

S _RE1 turns off when battery E1 is attached to camera body BD.
This is a battery attachment detection switch that is F. When the battery E1 is mounted and the battery mounting detection switch S _RE1 is turned off, the resistance R
1, the capacitor C1 is charged, and the reset terminal RE1 of the microcomputer μC1 in the body changes from “Low” level to “High” level. Then, the microcomputer μC1 in the body executes a reset routine described later.

S _SELF is a self mode setting switch for setting a self mode, and is a state switch that is turned ON when the switch key 23 is operated.

S _AEL is an AE lock switch, which is linked with the operation of the switch key 13.

S _PRS is a P reset switch, which is linked with the operation of the switch key 19.

S _MD is the AE mode change switch.
It is linked with the operation.

Sup and Sdn are up / down switches, which are linked with the operation of the switch keys 20 and 21, respectively.

Next, a configuration for serial data communication will be described.

The photometric circuit LM, the film sensitivity reading circuit DX, and the display control circuit DISPC serially communicate data with the microcomputer μC1 in the body via signal lines of a serial input SIN, a serial output SOUT, and a serial lock SCK. The communication target with the microcomputer μC1 in the body is the chip select terminal
Selected by CSLM, CSDX, CSDISP. That is, the terminal
When CSLM is at the “Low” level, the photometric circuit LM is selected. When the terminal CSDX is at the “Low” level, the film sensitivity reading circuit DX is selected. When the terminal CSDISP is at the “Low” level, the display control circuit DISPC is activated. Selected. In addition, 3
The serial communication signal lines SIN, SOUT, and SCK
_{15, J 5; J 14,} J 4; J 16, via J ₆ is connected to the lens circuit LE _CT, when selecting the lens circuit LE _CT as communication target, the terminal CSLE "Low" level is intended to be, this signal is transmitted to the lens circuit LE _CT via the terminal J _3, J _13.

Next, FIG. 4 is a circuit diagram of the lens in the circuit LE _CT incorporated in the interchangeable lens LE. In the drawing, μC2 denotes a microcomputer in the lens for controlling a zoom motor built in the interchangeable lens LE, data communication with the camera body BD, and control of mode setting.

Here, to describe the group of terminals J ₁ through J ₈ connected to the camera body BD, J ₁ is the power supply voltage for driving the zoom motor
A power supply terminal for supplying V _CC2 from the body side to the lens side, J ₂ is a power supply terminal for supplying a power supply voltage V _DD other than the above for driving the zoom motor from the body side to the lens side, and J ₃ is a data communication request terminals for input and output of signals indicating, J ₄ denotes a clock terminal for inputting a clock for data communication from the body side, J ₅ serial input terminal for inputting the data from the body side, J ₆ output data to the body side Serial output terminal, J ₇ is the ground terminal of circuits other than the motor drive circuit,
J ₈ is a ground terminal of the circuit for driving the motor.

When the signal to the lens microcomputer μC2 from the body microcomputer μC1 via the terminal J _3, J ₁₃ between the interchangeable lens and the body are transmitted, the lens microcomputer μC2 20 percent write occurs, the lens microcomputer μC2 is activated At the same time, an interchangeable lens is specified as a communication target with the body.

The RSIC is a reset IC for resetting the microcomputer μC2 in the lens when the voltage _VDD supplied from the body becomes lower than the normal operating voltage of the microcomputer μC2 in the lens. R2 and C2 are a reset resistor and a capacitor for resetting the microcomputer μC2 in the lens.

RE2 is a reset terminal of the microcomputer μC2 in the lens,
The voltage V _DD for driving the circuit inside the lens is supplied from the body, and the terminal RE2 is set to “Lo” by the resistor R2 and the capacitor C2.
When the level changes from the “w” level to the “High” level, the microcomputer μC2 in the lens performs a reset operation.

ZVEN is a zoom speed encoder linked to the operation ring 80 described above, and sets the speed and direction of the power zoom at the time of power zoom.

ZMEN is a zoom encoder for indicating the absolute position of the zoom ring. The lens of this embodiment has a focal length of fmin =
It is a lens of 35 mm to fmax = 200 mm.

 M3 is a zoom motor for driving the zoom ring.

MD3 is a motor drive circuit for driving the zoom motor M3, and controls the rotation of the zoom motor M3 according to a control signal indicating the motor drive direction and drive speed given from the microcomputer μC2 in the lens. The microcomputer μC2 in the lens
In response to the motor stop signal or the motor stop signal given from the controller, short-circuiting of both ends of the zoom motor M3 and stop of voltage application are performed.

 Next, switches will be described.

S _LE is a lens attachment detection switch.
Is turned off when mounted on the camera body BD and the mount is locked. In other words, the interchangeable lens LE is the camera body B
When removed from D, switch S _LE is turned ON and capacitor C2 is short-circuited. As a result, the electric charge stored in the capacitor C2 is discharged, and the terminal RE2 of the microcomputer μC2 becomes “Low” level. Thereafter, when the interchangeable lens LE is mounted on the camera body BD, the switch S _LE is turned off, the capacitor C2 is charged by the power supply line V _DD , and after a predetermined time determined by the resistance R2 and the capacitance of the capacitor C2, the terminal RE2 Is “H
igh "level, and the microcomputer μC2 performs a reset operation as described above.

S _RE is a release switch that is turned on when the key 24 is pressed.

Having described the hardware of the present embodiment, the software will now be described. First, the software of the microcomputer μC1 in the body will be described.

When the battery E1 is mounted on the camera body BD, the battery mounting detection switch S _RE1 (see FIG. 3) is turned off, the reset capacitor C1 is charged via the resistor R1, and the microcomputer in the body that controls the entire camera. μC1 reset pin RE1
, A reset signal that changes from a “Low” level to a “High” level is input. By inputting this reset signal,
The microcomputer μC1 in the body starts the clock generation by the internal hardware, operates the DC / DC converter DD, is supplied with the drivable voltage V _DD , and executes the reset routine shown in FIG. It is. In a stop state (a halt state) described later, the clock of the microcomputer μC1 in the body is stopped, and the operation of the DC / DC converter DD is also stopped. In the same manner as when the battery is mounted, the generation of the clock and the operation of the DC / DC converter DD are started by hardware inside the microcomputer μC1 in the body.

In the reset routine shown in FIG. 5, first, all interrupts are prohibited, and various ports and registers are reset (#
5, # 10). Then, it is determined whether or not the main switch _SM is ON (# 20). Main switch S _M is ON to OF
Even when the state changes to F or from OFF to ON, the interrupt SMINT by the operation of the main switch is executed from # 20. # 20
In when the main switch S _M is ON, it allows all interrupts, in order to turn ON the transistor Tr _1, Tr ₂ for feeding current to each circuit and the lens-side, power control terminals PW1, PW2
(Output ports) are set to the “High” level, and the process proceeds to # 50 (# 25, # 35). In # 50, the shooting preparation switch S1 is ON
It is determined whether or not it has been performed. # 50 shooting switch
When S1 is not ON, so as to turn OFF the power supply transistor Tr _1, Tr ₂ proceeds to # 65, the power control terminals PW1, PW2 and respectively "Low" level. Then go to # 70, DC / D
To stop the operation of C converter DD, power supply control terminal P
W0 is set to “Low” level. At # 50, the shooting preparation switch S1
If it is turned on, the subroutine of S1ON is executed in # 55. Thereafter, it is determined whether or not the flag S1ONF, which is set for 5 seconds while the shooting preparation switch S1 is ON or OFF, is set.
If not, go to # 65 (# 60). In an interrupt S1INT executed when the shooting preparation switch S1 is turned from OFF to ON, processing from # 55 is executed.

The subroutine of S1ON is shown in FIG. When this subroutine is called, first, a flag S1ONF indicating that this flow has been passed is set, the interrupt S1INT is disabled, and the power supply control terminal PW is turned on to turn on the power supply transistors Tr ₁ and Tr _2.
1, PW2 is set to "High" level, and a lens control subroutine is executed (# 500 to # 515).

Here, FIG. 9 shows a lens control subroutine.
When this subroutine is called, first, lens communication I
Is executed and predetermined data is input from the lens (# 700). Here, the lens communication I will be described.

The lens communication I is a communication mode for inputting data from the lens in the communication mode with the lens. This subroutine is shown in FIG. When this subroutine is called, first, data indicating that the communication mode is mode I is set, the terminal CSLE is set to the "Low" level, and the lens is informed that data communication is to be performed (# 400, # 402). .
Then, 2-byte serial communication is performed (# 405). At this time, the body and the lens simultaneously input data transmitted from the other party serially while outputting data serially to the other party. The first byte outputs data indicating the type of the body from the body. At this time, meaningless data FF _H (the subscript _H indicates a hexadecimal number) is output from the lens, and the lens and the body respectively input data sent from the other party. The second byte outputs data indicating the type of lens (new lens / old lens, etc.) from the lens. At this time, from the body is output with no data FF _H meaningful, each lens and the body enters the data sent from the other party. Then, in order to indicate that the communication mode with the lens is mode I, 1-byte data of the communication mode set above is output to the lens, and after a short wait, 7-byte data is input from the lens, and the terminal CSLE To “High” level and return (# 410 to # 42)
Five).

The content of the data sent from the lens to the body is (i)
Open aperture value AVo, (ii) the maximum aperture AVmax, (iii) the focal length f, (iv) a lens mounted signal, (v) the lens side of the release switch S _RE state, the virtual wide possible / not, the virtual wide Complete / incomplete, manual zooming / stop, (vi) shortest focal length fmin, (vii) longest focal length fmax.

When the lens communication I is completed, the flow returns to FIG.
The microcomputer μC1 determines whether or not the lens is an old lens (# 703).
If the old lens is used, there is no zoom drive motor on the lens side and the virtual wide function cannot be set. Therefore, the flag VWDF indicating the virtual wide is reset and the process returns (# 70).
Five). On the other hand, if the lens is a new lens, it is determined whether or not the lens is attached (# 710). When the lens is mounted, it is determined whether or not the virtual wide switch _SVWD has been turned from OFF to ON (# 715). # 715 virtual wide switch S
_{When the VWD} changes from OFF to ON, it is determined at step # 720 whether or not the virtual wide mode is being performed by using the flag VWDF. If it is in the virtual wide mode (VWDF = 1), this flag VWDF is reset at # 725 to exit this mode, and the routine proceeds to # 735. If the flag VWDF has not been set, the flag VWDF is set at # 730 as a transition to the virtual wide mode, and the routine proceeds to # 735. If the virtual wide switch S _VWD has not changed from OFF to ON in # 715, # 7
Continue to 35. If it is determined in # 710 that the lens is not attached, the flag VWDF indicating the virtual wide is set to # 732.
And go to # 735. In step # 735, the lens communication II subroutine for outputting data to the lens is executed and the routine returns.

FIG. 12 shows this lens communication II subroutine. When this subroutine is called, first, data indicating that the communication mode is mode II is set, the terminal CSLE is set to “Low” level, and two bytes of data are used to mutually inform the camera and the lens type. Performs data communication, then performs 1-byte data communication to indicate the communication mode (here, mode II), waits a short time, outputs 1-byte data to the lens, and sets terminal CSLE to “High” level And return (# 900 to # 925). Data output to the lens includes a flag VWDF indicating virtual wide and a flag ZUPF indicating zoom-up.

Returning to the flow of FIG. 7, when the subroutine of the lens control is completed, the process proceeds to # 520, where it is determined whether or not the switch S1 is ON. If the switch S1 is being turned ON, and enter the CCD data from the focus detection light receiving circuit AF _CT in # 525 calculates a lens drive amount based on this, and outputs the drive amount to the motor drive circuit MD1 And proceed to # 560.
When the switch S1 is not turned on, the above-described AF operation (#
525), and proceed to # 560. At # 560, the film sensitivity SV is input from the film sensitivity reading circuit DX. And
In # 565, the brightness B of the subject from the photometric circuit LM at the full aperture
Enter Vo. Describing this data input, first, the terminal CSDX or CSLM is set to the “Low” level, and a circuit (DX or LM) to input data is selected. And terminal SIN
Input data from. After inputting the data,
Set CSDX or CSLM to “High” level, and end data input.

 Next, a key input subroutine is executed.

This is illustrated in FIG. 10. First, it is determined whether or not the P reset switch _SPRS has changed from OFF to ON (# 750). If the switch S _PRS changes from OFF to ON, the AE mode (AEM) is reset to the P mode, the shift amount PΔEV due to the program shift is reset to 0,
The flag VWDF indicating the virtual wide is reset and the process returns (# 755 to # 765). If the switch S _PRS has not changed from OFF to ON, the process proceeds to # 770, and it is determined whether the AE mode change switch _SMD has changed from OFF to ON. If switch S _MD changes from OFF to ON, #
Proceeding to 775, it is determined whether the switch Sup has changed from OFF to ON. If the switch Sup has changed from OFF to ON, it is determined that the up key 20 has been operated, and the AE mode (AEM) is alternately changed to the P mode and the S mode, and the process returns (# 780). At # 775, switch Sup is turned on from OFF
If not, it is determined that the up key 20 has not been operated, and the flow advances to # 785, where the switch Sdn is changed from OFF to O.
It is determined whether it has changed to N. Switch Sdn is OFF to O
If it has changed to N, it is determined that the down key 21 has been operated, and the AE mode (AEM) is alternately changed to the P mode and the S mode, and the routine returns. Switch Sdn turns off at # 785
Also returns when it has not changed from to ON.

In step # 770, when the switch _SMD has not changed from OFF to ON, the process proceeds to step # 790 and thereafter to determine whether or not the up key 20 or the down key 21 has been operated from OFF to ON of the respective switches Sup and Sdn. (# 790,
# 795). When the up switch Sup changes from OFF to ON, the AE mode (AEM) is determined. If the switch is the P mode, the shift amount PΔEV is calculated as PΔEV = PΔEV + ΔEV.
(ΔEV is a predetermined amount). If the mode is not the P mode, the set amount TVc of the shutter speed is set to TVc = TVc + ΔEV, and the process returns (# 791 to # 793). On the other hand, down switch Sd
When n changes from OFF to ON, the AE mode (AE
M) is determined, and if the mode is the P mode, the shift amount PΔE
Let V be PΔEV = PΔEV−ΔEV, and if not P mode,
The set amount TVc of the shutter speed is set to TVc = TVc−ΔEV, and the process returns (# 796 to # 798). Switch Sup, Sd
If there is no operation of n, return immediately.

Next, the microcomputer μC1 in the body executes an exposure calculation subroutine (see FIG. 11) at # 575 in FIG. When this subroutine is called, first, the AE lock switch S
_It is determined whether or not the _AEL is ON. If the _AEL is ON, the process returns without determining that the exposure value is changed (# 800). Switch S _AEL is ON
If not, set the exposure value EV to EV = BVo + AVo + SV
Ask for. BVo is the subject brightness value measured by open metering, A
Vo is the open aperture value and SV is the film sensitivity. Next, it is determined whether or not the camera is in the P mode.
And the aperture value AV are calculated (# 810, # 815). A specific example of this AE program diagram is disclosed in, for example, Japanese Patent Application Laid-Open No. 1-129238. Then, it is determined whether or not the virtual wide mode is set. If the virtual wide mode (VWDF = 1), the shutter speed TV is set to one step (1E) to perform exposure control with a slight aperture.
V) Slow down and stop down the aperture by one stop (1 EV) (# 820 to # 8
30), proceed to # 835.

Here, the reason for performing exposure control with a slight aperture in the virtual wide mode will be described. Now, since the virtual wide mode is set, zooming (f / 1.4) is performed toward the wide angle side, and focus detection is performed in that state. On the wide-angle side, since the depth of focus with respect to the subject distance is deep, even if the focus width is constant, the camera can focus on a wide range of distances. The distance range becomes smaller. Therefore, if the zoom lens is focused near the end of the focusing width on the wide-angle side, it will not be focused when zoomed in. Also, on the wide-angle side, since the focus detectable range is widened, an unintended subject is also considered as a target of focus detection, and as described above even if the subject to be focused is not in focus or is in focus. In some cases, the focus is adjusted near the end of the focus width. Therefore, even in such a case, in order to reduce the occurrence of defocus, exposure with a slight aperture is performed.

Returning to FIG. 11, virtual wide mode (VWDF =
0), the process proceeds to step # 835, where the shift amount PΔEV is added to the shutter speed TV, and the shutter speed TVc for exposure control is added.
Ask for. In step # 840, the shift amount PΔEV is subtracted from the aperture value AV to obtain an aperture value AVc for exposure control.
To return. If the mode is not the P mode in # 810, it is determined that the mode is the S mode and the process proceeds to # 845, and the aperture value AVc for exposure control is
Return as c = EV−TVc.

After executing the exposure calculation subroutine, the microcomputer μC1 in the body executes the lens communication I subroutine for inputting data from the lens again at # 580 in FIG. 7, and based on the data, executes the display subroutine at # 590. Execute. Here, virtual wide availability, field of view in the screen,
Data such as the shutter speed TVc for exposure control and the aperture value AVc are serially output to the display control circuit DISPC, and the display control circuit DISPC displays the display section DISP _I on the body and the display in the viewfinder based on the serially input data. Display is performed by the display unit DISP _II outside the screen and the display unit DISP _III inside the screen.

FIG. 21 shows the on-body display DISP _I , and FIG. 22 shows the in-finder display DISP _II and the display inside the screen.
DISP _III is shown. In each of the above figures, (a) is a virtual wide mode and zooming to the wide side is completed.
FIG. 22 (b) shows a state in which it is warned that it is not possible to shift to the virtual wide mode, FIG. 22 (c) shows a state other than the virtual wide mode (normal mode), and FIG. Indicates zooming.

The on-body display DISP _I and the display DISP _II outside the screen of the infinder display exactly the same contents. In the display units DISP _I and DISP _II , in the virtual wide mode (a) and when zooming is completed, “VW” indicating the virtual wide mode is displayed in addition to the display of the shutter speed and the aperture value. In the display unit DISP _III, and displays a visual field frame F ₁ to be actually photographed by the virtual wide mode, the position is changed in correspondence to the field frame F ₁ and the field frame F ₀ of the normal mode of the virtual wide mode The position of the imprint data "DAT" is displayed.
At the time of the warning (b), display of the view frame F ₁ and the virtual wide mode "VW" is flashing. At this time, the copy data "DA
Display of T "is displayed at a position corresponding to the field frame F ₀ of the normal mode. In the display in the normal mode of (c), the position of the imprint data “DAT” on the screen, the shutter speed and the aperture value are displayed. In FIG. 22 (d), the mode display of “VW” is performed in the virtual wide mode, and the display on the screen is entirely erased because zooming is being performed.

A subroutine for performing the above display is shown in FIG. 13 and described. First, it is determined whether or not the virtual widening operation has been completed based on the data input from the lens. If the virtual widening operation has not been completed (VWDCF ≠ 1), it is determined whether or not zooming is in progress. The determination is made based on the input data (# 1000, # 1001). If the virtual wide has not been completed and zooming is being performed, it is determined that the zoom operation has been performed to enable the virtual wide when the virtual wide has been previously warned that the virtual wide has been disabled. move on. When the virtual wide is completed, or when the virtual wide is not completed but the zoom is not being performed, the process proceeds to step # 1002, and a flag is provided to determine whether the virtual wide mode is set.
Judge by VWDF. If virtual wide mode is set (VWDF = 1), virtual wide OK input from lens
It is determined whether or not it is virtual wide OK based on the data indicating. When the virtual wide is OK, a signal for displaying "VW" indicating the virtual wide mode is set, and it is determined whether or not the virtual wide (VWD) is completed (# 1010, # 1015). When a virtual wide complete sets a signal for displaying a field frame F _1, imprinting data corresponding to the field frame F ₁ "DAT"
Signal for designating the display position of is set, the timer flag TIMF is reset, and the process proceeds to # 1045 (# 1020, # 1
021, # 1024). The time in the # 1015 not a virtual wide completion (when in zoom), and set a signal for erasing the field frame F _1, and set a signal for erasing the display of the imprinting data "DAT", Proceed to # 1024 (# 1022, # 102
3). In # 1005, when the virtual wide mode is prohibited, the display of “VW” indicating the virtual wide mode flashes, and
Blink the field frame F _1, and sets a signal for designating a display position of the imprinting data "DAT" corresponding to the field frame F _0, the flow proceeds to # 1031. In # 1031, it is determined whether or not the timer flag TIMF has been set. When the flag TIMF is not set, the timer T3 is reset and started, the flag TIMF is set, and the process proceeds to # 1034 (#
1032, # 1033). When the flag TIMF is set, the process proceeds to # 1034. In # 1034, it is determined whether or not the timer T3 has elapsed for 5 seconds. If 5 seconds have elapsed, the flag VWDF indicating the virtual wide is reset in # 1035, and the process proceeds to # 1045. Even if 5 seconds have not elapsed, the process proceeds to # 1045.

In # 1002, not equal to the virtual wide mode (VWDF = 1), and set a signal for erasing display and a field frame F ₁ of the "VW" indicating a virtual wide mode, imprinting data corresponding to the field frame F ₀ A signal for displaying the position of "DAT" is set, and the process proceeds to # 1024 (# 1038, # 1040). # 1
In 045～ # 1065, control of the shutter speed TVc, control of the aperture value AVc, display / flashing / erasing of "VW", the display / flash / erase field frame F _1, display of imprinting data "DAT" / The signals indicating the erasure and display positions are transmitted to the display control circuit DI
Output to SP and return.

In the flow of FIG. 7, when the above-described display routine is finished in # 590, based on the data input from the lens,
It is determined whether or not the release switch S _RE on the lens side is ON, and if it is ON, the process proceeds to # 600 (# 59).
2). If the switch S _RE has not been turned on, it is determined in step # 595 whether or not the body-side release switch S2 has been turned on. If the switch S _RE has been turned on, the flow proceeds to # 600 (# 59)
Five). In step # 600, it is determined whether or not zooming is being performed based on data input from the lens. If zooming is in progress, the process proceeds to step # 635 to inhibit release. If the zoom is not being performed in # 600, the process proceeds to # 601 in FIG. 8 to determine whether or not the virtual wide mode is set. If it is not the virtual wide mode (VWDF = 1), the process proceeds to # 609, and it is determined whether or not the mode is the self mode based on ON / OFF of the switch S _SELF . Switch S
_{If SELF} is ON, the _camera is in the self mode. After measuring 10 seconds at # 610, the process proceeds to # 617. If the switch S _SELF is not ON, the mode is not the self mode, and thus skip step # 610 and proceed to step # 617. # 601 virtual wide mode (VWDF =
If 1), proceed to # 602, set a flag ZUPF indicating zoom-up, and send this data to the lens.
In step # 603, the subroutine of lens communication II is executed. Then, in step # 604, whether the self mode is set or not is determined by _turning on / off the switch S _SELF.
Judge based on FF. If the switch S _SELF is ON, it is in the self mode, so it measures 10 seconds at # 605,
If the switch S _SELF has not been turned ON, the mode is not the self mode, and thus skip # 605 and proceed to # 606. Next, the subroutine of lens communication I is executed in # 606 to input data from the lens, and in # 607, it is determined whether or not the zoom is completed based on the data input from the lens. If the zoom has not been completed, the process waits a little in # 611 and returns to # 606. On the other hand, if zooming has been completed, the flag ZUPF indicating zoom-up is reset in # 608, and the flow proceeds to # 617 and thereafter.

After # 617, all interrupts are prohibited, exposure control is performed, and after the exposure control is completed, the film is wound up by one frame (# 617 to # 625). Then, in order to indicate that the subroutine of S1ON has been completed, the flag S1ONF is reset, the interruption S1INT by turning on the shooting preparation switch S1 is permitted, the flag VWDF indicating the virtual wide mode is reset, and the process returns (# 630). ~ # 634).

In the flow of FIG. 7, the release switch S is set at # 595.
Even if 2 is not ON, proceed to # 635. In # 635, it is determined whether or not the shooting preparation switch S1 is ON. If the shooting preparation switch S1 is ON, the timer T2 for holding the power is reset and started in # 640, and the process returns. On the other hand, when the shooting preparation switch S1 is not turned on, it is determined at # 650 whether or not zooming is being performed based on the lens data. If the zoom is being performed in # 650, the process proceeds to # 640, where the timer T2 is reset and started, and the power holding time is extended. If the zoom is not being performed in # 650, it is determined whether or not the timer T2 for holding the power has counted 5 seconds in # 655, and the process returns if 5 seconds have not elapsed. If 5 seconds have elapsed, proceed to step # 630, and turn off the shooting preparation switch S1
The control of the end of the photographing due to being performed is performed.

Next, the exposure control subroutine executed in # 620 is shown in FIG. When the subroutine is called, first, a predetermined control signal is output to control the release (# 1330). As a result, the locking portion (not shown) is released, and a release operation such as a mirror-up operation is performed. next,
The aperture is narrowed down to the aperture indicated by the control aperture value AVc (# 1
332). Next, the microcomputer μC1 in the body waits for the mirror-up to be completed. When the mirror-up is completed, the microcomputer μC1 runs one curtain. Then, the timer T4 for counting the actual exposure time Ts according to the control shutter speed TVc is reset and started (# 1340 to # 1350). afterwards,
Proceed to # 1370 and wait for the exposure time Ts to elapse. When the exposure time Ts elapses, two curtains are run, and the process returns after waiting for the time when the two curtains are completed (# 1375, # 1380).

 This concludes the description of step # 55 in FIG.

Returning to the flow of FIG. 5, the main switch S _M is turned on at # 20.
Otherwise, proceed to # 80, to prohibit an interrupt other than the interrupt SMINT by ON of the main switch S _M. By OFF of the main switch S _M, as executing this flow, sets the flag SMOFF show this, in order to cancel the virtual wide mode, it resets the flag VWDF (# 87, # 9
0). Next, to turn off the transistors Tr ₁ and Tr ₂ that supply power to the camera side circuit and the zoom motor of the lens, the terminals PW1 and PW2 are set to “Low” level, and the DC / DC converter is further turned on.
In order to turn off DD, the terminal PW0 is set to "Low" level and stopped (# 120, # 125). Thus the microcomputer μC1 in the body
Enters sleep mode.

Next, a control operation by the microcomputer μC2 in the lens will be described. When the lens is not attached to the camera body, the lens attachment detection switch S _LE shown in FIG.
And the reset terminal RE2 of the microcomputer μC2 in the lens becomes “L”.
The circuit on the lens side is not driven at all because it is maintained at the "ow" level. When the lens is mounted on the camera body, the lens mounting detection switch S _LE is turned off, and the reset terminal RE2 is switched from the "Low" level to the "High" level. "A signal that changes to a level is input, whereby the microcomputer μC2 in the lens executes the reset routine shown in FIG. 15. First, the microcomputer μC2 in the lens resets the ports and registers and stops.

Next, when a signal that changes from “High” level to “Low” level is transmitted from the body to the lens terminal CSLE, the microcomputer μC2 in the lens executes the CS interrupt routine shown in FIG. In this routine, 2-byte serial communication is performed in response to a clock from the camera (# L560).
Subsequently, data indicating the communication mode is input from the body by one-byte serial communication, and the communication mode is determined (#
L585, # L590).

In the communication mode I, 7-byte data is output to the camera, and the signal to the terminal CSLE is changed from “Low” level to “High”.
Wait for the level to change to “High” level,
The process proceeds to a subroutine of power zoom (abbreviated as "PZ" in the figure) of # L610 (# L600, # L605), and thereafter, the subroutine of PZ is repeated.

In the case of the communication mode II, 1-byte data is input from the body side, and the terminal CSLE waits for a change from the “Low” level to the “High” level. The process proceeds to a subroutine (# L630, # L635), and thereafter, the PZ subroutine is repeated.

FIG. 17 shows a subroutine of PZ. In this subroutine, the focal length information (f) is read from the zoom encoder ZMEN in # L705, the "Vwide" subroutine is executed in # L715, and the manual zoom ("MZ" in the figure) subroutine is executed in # L730. And return.

The subroutines Vwide and MZ will be described below. First, the Vwide subroutine shown in FIG. 19 will be described. In # L1000, whether the virtual wide is completed, that is, the focal length is changed from f to f / k (k is a predetermined value, for example, 1.
4) It is determined by the flag VWDCF whether or not widening is performed. Then, when the virtual wide is completed (VWDCF =
1) Proceed to # L1005 to determine whether or not the virtual wide mode is set based on data input from the camera. When not in the virtual wide mode (VWDF = 1), proceed to # L1030,
The lens is controlled to f × k so as to return to the original focal length before widening. After this control ends, the flow proceeds to # L1025 to reset the flag VWDCF indicating virtual wide completion, and returns.

In # L1005, if it is virtual wide mode (VWDF
= 1), proceeding to # L1010, a flag to return to the original focal length before virtual widening by turning on the release button
It is determined whether or not ZUPF is set based on data input from the body. When the flag ZUPF is set, the flow advances to # L1015, and the lens is controlled to f × k so as to return to the original focal length before widening. After this control ends, the flow proceeds to # L1020. Assuming that the zoom has been completed, a zoom completion flag ZMCF (this is output to the body side) is set, and the flow proceeds to # L1025. In # 1025, as described above, the flag VWDCF indicating virtual wide completion is reset, and the routine returns. In # L1010, the flag ZUPF
If is not set, return immediately.

# In L1000, flag VWDCF indicating virtual wide completion
If is not set, the process proceeds to # L1033 to determine whether or not the virtual wide mode (VWDF = 1). If it is the virtual wide mode, the process proceeds to # L1035. If it is not the virtual wide mode, the process immediately returns. In # L1035, it is determined whether or not a value (f / k) obtained by dividing the current focal length f by k is equal to or longer than the shortest focal length fmin unique to the lens. When f / k <fmin, virtual widening is assumed to be impossible.
OK flag VWDOKF (this is output to the body)
And return (# L1060). (F / k) ≧
If fmin, flag VWDOKF indicating virtual wide OK
Is set to f / k, and after this lens control is completed, a flag VWDCF indicating virtual wide completion is set, a flag ZMCF indicating zoom completion is reset, and control is returned (# L1040 to # L1055). ).

Next, the MZ subroutine will be described with reference to FIG.
First, an encoder that indicates the speed and direction of manual zoom
Loading ZVEN, velocity V ₁ ~ based on the encoder
Let V ₃ (V ₁ <V ₂ <V ₃ ) be the zoom speed V (# L900, # L91
Five). Next, in # L920, it is determined whether or not the zoom-up switch Zup of the encoder ZVEN is turned on. When the switch Zup is ON, it is determined at # L925 whether or not the flag VWDCF indicating virtual wide completion is set. When the flag VWDCF is set, it is determined whether or not a value (fmax / k) obtained by dividing the lens-specific longest focal length fmax by a predetermined value k is smaller than f (# L930).
When fmax / k <f, it is possible to zoom in at the time of photographing, zoom-in control is performed at the set speed V, and a flag LMVF indicating that the lens is being driven (this is output to the body side) is set. And return (# L935, #L
940). In # L930, when fmax / k ≧ f, # L950
To determine the flag LMVF, and the lens is being driven (LMVF =
If 1), stop the lens at # L955, reset the flag LMVF at # L960, and return. Since this routine is fast, if f = fmax / k during lens driving, the lens stops at that position. If the flag LMVF is not set in # 950, the routine immediately returns.

If the flag VWDCF is not set in # L925, the process proceeds to # L945 to determine whether the focal length f is less than the longest focal length fmax unique to the lens. If f <fmax, the process proceeds to # L935, zoom-up control is performed, and f ≧
If fmax (f> fmax is not possible), the process proceeds to # L950 to control the lens driving stop.

When the zoom-up switch Zup is not turned on in # L920, the process proceeds to # L965, and it is determined whether the zoom-down switch Zdn of the encoder ZVEN is turned on. When the switch Zdn is ON, it is determined whether or not the focal length f is greater than the shortest focal length fmin unique to the lens (# L970). If f> fmin, it is determined that zoom-down is possible, zoom-down control is performed at the set speed V, a flag LMVF indicating that the lens is being driven (this is output to the body side) is set, and the routine returns. (#
L975, # L980). In # L970, if f ≦ fmin (f <fmin is not possible), the flow advances to # L985 to determine the flag LMVF. If the lens is being driven (LMVF = 1), the lens is stopped in # L990. , Reset the flag LMVF at # L995 and return. Since this routine is fast, f
= Fmin, the lens stops at that position. # 985
If the flag LMVF is not set, the routine returns immediately.

Modification In the above-described embodiment, the virtual wide mode is released after the photographing ends. This is because the flag VWDF indicating the virtual wide is reset in # 634 after the exposure control in # 620 in FIG. The program shown in FIG.
When deformed as shown in FIG. 20, the virtual wide mode is maintained even after the shooting ends. In the flow of FIG. 20, step # 634 shown in FIG. 8 is omitted, and instead, step # 6 of FIG.
When the timer T2 for holding power is timed up (5 seconds have elapsed) at 55, the flag VWDF is reset at # 627.

[Effects of the Invention] According to the present invention, in a camera having a virtual wide function of shortening the focal length of a photographic lens other than during exposure control as compared with that during exposure control, the present focal length and the shortest focal length of the photographic lens are reduced. It is determined whether the virtual wide function can be set based on whether the setting of the virtual wide function is impossible or not.If it is determined that the setting of the virtual wide function is not possible, a warning is issued, so when the focal length of the taking lens is close to the shortest focal length. This has the effect that the photographer can be notified that the virtual wide function cannot be used.

In addition, when a certain time has elapsed after the start of the warning, when there is a re-operation for setting the virtual wide function, or
If the warning is canceled when the virtual wide function can be set by zooming up, there is an effect that unnecessary warning can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the basic configuration of the present invention, FIG. 2 (a) is a perspective view showing the appearance of the body of a single-lens reflex camera as one embodiment of the present invention, and FIG. FIG. 3 is a perspective view showing the appearance of the interchangeable lens of the single-lens reflex camera, FIG. 3 is a block circuit diagram showing the circuit configuration of the above-described body, FIG. 4 is a block circuit diagram showing the circuit configuration of the above-described interchangeable lens, and FIGS. FIG. 20 is a flow chart for explaining the operation of the above, FIG. 21 is an explanatory diagram showing the display contents on the body of the same single-lens reflex camera, and FIG. 22 shows the display contents in the viewfinder of the same single-lens reflex camera. FIG. 1 is a photographing lens, 2 is a viewfinder, 3 is operation means, 4
Denotes control means, 5 denotes display means, 6 denotes first output means, 7 denotes second output means, 8 denotes determination means, and 9 denotes warning means.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshihiro Hara 2-3-13-1 Azuchicho, Chuo-ku, Osaka-shi, Osaka Inside Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Yasuo Maeda Azuchi, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta Camera Co., Ltd., 2-313 Machi (72) Inventor Shigeto Omori 2-3-3 Azuchicho, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Bunshi Ishido Osaka International Building Minolta Camera Co., Ltd. 2-3-113 Azuchicho, Chuo-ku, Osaka-shi, Osaka (72) Inventor Hiroshi Otsuka 2-3-113 Azuchicho, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta (56) References JP-A-2-103022 (JP, A) JP-A-64-57248 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 5/00 G02B 7/08 G03B 13/00-13/28 G03B 17/18-147/20

Claims (4)

(57) [Claims] An imaging lens having a power zoom function;
A viewfinder that configures the field of view with the angle of view according to the focal length of the shooting lens, and a virtual wide function that widens the field of view of the viewfinder by setting the focal length of the shooting lens shorter than during exposure control other than during exposure control Control means for reducing the focal length of the photographing lens in response to the operation of the operation means and performing control to return the focal length to the original during exposure control, and a field of view widened by the virtual wide function. Display means for displaying the actual photographing field frame when set; first output means for outputting information on the current focal length of the photographing lens; and second output for outputting information on the shortest focal length of the photographing lens. Means, determining means for determining whether or not the virtual wide function can be set based on the output of the first and second output means, and operating means operated and the determining means determines whether or not the virtual wide function can be set. A camera having a virtual wide functions, characterized in that it comprises a warning means for performing a warning when the constant is determined to be impossible. 2. The camera having a virtual wide function according to claim 1, further comprising a warning canceling means for canceling the warning after a lapse of a predetermined time after the start of the warning. 3. A camera having a virtual wide function according to claim 1, further comprising a warning canceling means for canceling a warning when the operating means is operated again. 4. The virtual wide function according to claim 1, further comprising warning canceling means for canceling a warning when it is determined that the setting of the virtual wide function is possible due to an increase in the focal length by zooming up. With a camera.