JPH0284623A - Camera system - Google Patents

Abstract

PURPOSE:To prevent improperness such that a no longer existing mode remains as a set mode after the selected modes is changed by changing the set mode to a prescribed mode according to the change in the selection of usable and settable modes and surely placing the prescribed mode in the selected modes after changed. CONSTITUTION:When (a program mode P, a diaphragm preferential mode A, and a manual mode M) are selected and when the mode A is set to be used among them, the selected modes are changed by a selecting means to (P, a shutter speed preferential mode S, and M). In this case, the contents of (P, M and S), which are stored in a first storage means, are different from (P, A and M), which are stored in a second storage means, therefore, a compared result, i.c., these contents are different, is output from a comparing means. In response, a control means places a specific mode, e.g., the mode P as a set mode replacing the mode A. Evenwhen (P and A), (P, A, S and M), (P, A and S), (P and S), (P and M), or (P) are selected, the set mode is always the mode P. Thus, when the usable selected modes are changed, a mode matching to the changed condition is set.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera system having a plurality of modes relating to camera control functions.

When it comes to exposure, the Joki Summer Limb Distortion Camera uses P mode (program mode) and A mode (aperture priority mode).

Normally, there are S mode (shutter speed priority mode) and M mode (manual mode), and one of these is set to be used, and the aperture value and shutter speed are determined according to this set mode. , 2) It has become a shadow. When selecting one of these modes, the user presses the shift key to select the desired mode.

However, among these multiple modes, some modes may not be used depending on the photographer's intentions or the shooting conditions, so in such cases, it is recommended to delete unnecessary modes in advance. If possible, it would be convenient because it would reduce the number of times the shift key is pressed when setting the mode.

Therefore, it is preferable to enable selection means to select only the necessary modes in advance. However, in that case, when the selection by the selection means is changed, the mode that was set before the selection may not exist in the selected mode after the change. If you do so, a mode that is not used will be set, which is unreasonable.

The present invention has been made in view of the above points, and an object of the present invention is to provide a camera system in which, when a selection of available modes is changed, mode settings are made to match the changed state. With the goal.

The camera system of the present invention that achieves the above object includes a selection means for selecting a mode that can be set for use regarding the control function of the camera, and a selection means for selecting a mode that can be used with respect to the control function of the camera, and a mode that can be used among the selected modes. a first storage means for storing the mode selected by the selection means; a second storage means for storing the mode before being selected by the selection means; and a control means for setting the setting mode to a specific mode based on the comparison result of the comparison means.

In this case, a mode may be provided that is always selected during selection by the selection means, and this mode may be set as the specific mode.

Stop-■ To explain the effect of the configuration of the present invention using the above-mentioned exposure mode as an example, for example, in a state where [PA, M) is selected first and A mode is set to be used from among them. When the selection state is changed to (P, S, M) by the selection means in , the selection state is changed to (P, M, M) stored in the first storage means.
S) and (P,
AM] are different, so the comparing means outputs a comparison result indicating that they are different. In response to this, the control means sets a specific mode (for example, P mode) as the setting mode instead of A mode.

By changing the selection method, (P, A), (P, AS, M),
CP, A, S), (P, S), [P.

M] or CP) is also selected, the P mode becomes the setting mode.

In any case, when a change occurs in the modes that can be used and set by operating the selection means, the setting mode becomes a specific mode.

Back JJ [ Embodiments of the present invention will be described below with reference to the drawings.

In the following description, the entire camera control system using an IC card will be described, and the selection and change of modes that can be used and the corresponding changes in the setting mode will also be explained.

FIG. 1 is a circuit block diagram of the camera of this embodiment. In the figure, (μC) is the control of the entire camera.

A microcomputer (hereinafter referred to as a "microcomputer") that performs various calculations has an E''FROM, and internal writing and reading can be performed freely.

(AFct) is a focus detection circuit that performs focus detection,
It consists of a COD, an integral control circuit, and an A/, 0 conversion circuit, and obtains object information for three distance measurement areas (described later), A/D converts it, and outputs it to a microcomputer (μC).

(M) is a photometering circuit that measures light in four areas (described later), converts the photometric values into A/D, and converts them into a microcomputer (μ
C) as luminance information. (DISPC) is a display control circuit which inputs display data and display control signals from a microcomputer (μC) and causes the display unit (DISP) to perform a predetermined display.

In this example, there are two types of IC cards: a mode setting card that sets the camera mode and a program card that determines exposure. Only one of these cards can be installed in the camera, and the camera will Based on this, a specific mode 2 exposure program is controlled. This will be explained in detail later. (ST) is an electronic flash device,
(IF) is the camera's microcomputer (μC) and electronic flash device (
S? ), an interface provided between (S
TC) is a light control circuit that receives the reflected light from the subject during flash light emission that passes through a not-shown Yang lens, and stops the flash light emission when the appropriate exposure amount is reached. (LID) is a lens circuit provided in the lens and outputs information specific to the interchangeable lens to the microcomputer (μC) of the camera. (LECN) is a lens drive control circuit that drives the projection lens based on focus detection information, (TVct) is a shutter control circuit that controls the shutter based on a control signal from a microcomputer (μC), and (AVcy) is a microcomputer (μC). Aperture control circuit that controls the aperture based on the control signal from μC), (MO)
is a motor control circuit that controls film winding and rewinding based on control signals from a microcomputer (μC). (BZ) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is a battery that serves as a power source, (DI) is a diode for backflow prevention,
(Ctu) is a backup capacitor for the microcomputer (μC), and has a large capacity. (R++)
(Cm) is a reset resistor and capacitor for resetting the microcomputer (μC) when the battery is installed.

(Trt) is a power supply transistor that supplies power to a part of the circuit described above.

Next, explaining the switches, (Sat) is a battery installation switch that turns OFF when a battery is installed, and when a battery is installed and the switch (SR1) turns OFF, the microcomputer (μC) terminal (RE) is applied with a signal that changes from “L” level to rH level, and the microcomputer (μC
) will execute the reset routine described below.

(SEX) is a normally open exposure mode change switch, and the operation of this switch (SEX) and the up switch (described later)
The exposure mode is changed by operating the Sup) and down switch (Sdn) - (SFX) is a normally open function change switch, and the exposure mode is changed by operating this switch and the up switch (Sup) + down switch (Sdn). A function change (for example, switching between quick shooting and single shooting) is performed. (S
CD) is a normally open card function enable/disable switch that disables or enables the card function when the card is inserted.

(Scos) is a normally open card data setting switch that is operated when changing the mode setting or setting data necessary for the function when a mode setting card or function card (program card) is installed. .

(So) is a photometry switch operated to perform camera operations (for example, photometry and display of various data) other than autofocus (hereinafter referred to as rAFJ) operation, and can be turned on by simply touching the release button (not shown). It consists of a touch switch. The above switch (Six)
(SFM) (Sco) (Sees) If one switch of (SO) is turned on, the microcomputer (μC)
executes the interrupt flow (INTI) in FIG. 3, which will be described later. (S,) is the AF switch that starts the AF operation, and is turned on by pressing the first stroke of the release button.
becomes. (SZ) is a release switch operated when performing a shadowing operation, and is turned on when the second stroke (deeper than the first stroke) of the release button is pressed. (
Swo) is a one-frame switch that is turned ON when one frame of film is wound.

(SaiL) is a switch for performing AE lock (exposure lock), and is composed of a normally open button switch. (SAF/M) is a focus adjustment mode changeover switch for switching between AF and manual focus adjustment.

(Sst) is a normally open change data selection switch for selecting data to be changed. (Sru, l) is a constantly open change data enable/disable switch that enables/disables the data selected by the change data selection switch (Ssx) when the mode setting card is installed and the data setting mode is set. It is a changeover switch - C3txt
) is a normally open exposure mode combination selection switch that selects an exposure mode combination when a mode setting card is installed and the data setting mode is set. (
SFLH) is a film detection switch that detects whether or not film is loaded, and is placed on the film rail surface near the spool chamber, and is turned off when film is present. (Sac) is a back cover close detection switch that turns OFF if ONL is opened when the back cover is closed.
C) executes an interrupt routine to be described later. (S,)
is a switch for starting film rewinding, and when operated it executes 0IJL, an interrupt routine to be described later, and turns off when the back cover is opened. (So) is an IC card mounting switch that turns OFF when an IC card (CD) is mounted, and when turned OFF, resets the microcomputer (μCm) of the IC card (CD). (
x) is the so-called
becomes.

(Supt) and (Supz) are up switches that switch or add data to be changed, and (Sdn
+) and (Sdn2) are down switches that also perform subtraction. Except for changing the aperture value or shutter speed when the exposure mode is manual mode (M mode), each of the above switches (Supt), (Supz), (Sdr
+1).

(Sdnz) is a parallel switch, and when either the up switch (Supt) or (Supt) is pressed, it performs the up function, and the down switch (Sdn+
) or (sdnt) is pressed, the down function is performed. When changing the aperture value or shutter speed in M mode, (Supt) + (Sdn,) increases and decreases the aperture value, (Supz) and (Sd) respectively.
nz) function to increase and decrease the shutter speed, respectively.

In addition, in the following, when the up switch (Sup) is used, it refers to either the switch (Supt) or (Supt), and similarly when the down switch (Sdn) is used, it refers to either the switch (Sdn+) or (Sdnz). shall refer to. Up switch (Sup),
The terminal (I) indicates that the down switch (Sdn) has been operated.
It is detected when the signals sup) and (Isdn) each become "L" level.

In Figure 1, the line common to each of the above switches ([)
is connected to the ground potential point (GND).

Table 1 summarizes the above-mentioned switches and their functions.

Next, before explaining the operation of the camera of this embodiment, two types of IC cards used here, namely a mode setting card and a program card, will be explained.

(+) Mode setting card: This IC card allows the photographer to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that seem unnecessary), or to choose between two functions. The intention of the photographer by doing.

The aim is to provide cameras that are compatible with photographic techniques. Additionally, unnecessary functions can be omitted, resulting in a camera that is simplified and has good operability when changing modes. Next, the explanation regarding this card and the display contents performed for it will be explained.

First, to select the functions of this IC card, (i) 4
(ii) exposure mode selection; (iii)
) You can select the function of the AE lock button, etc.

The four functions in (i) above are (a-1) Highlight reference/shadow reference exposure function (a-2) i-output correction function (a-3) film winding mode switching function (quick shooting/single shooting) (a-4) Spot AF/multi-point AF switching function, which allows the photographer to select the function necessary for the photographer. The display related to this selection is shown in Fig. 2(b) out of all the display contents shown in Fig. 2(a).
) are available. In FIG. 2(t)l, the functions correspond to the above-mentioned functions (al) to (a-4) in order from the left side. The photographer uses (a-1) highlight standards.
If you do not need only the shadow reference exposure function, use the second
It is displayed as shown in figure (C).

For each selected function, the display regarding the use or switching of that function is as follows: Highlight standard --- Figure 2 (d) Shadow standard --- Figure 2 (el exposure Correction + side -...
...Fig. 2 (f) Exposure compensation - side - Fig. 2 (g) Continuous shooting mode -...Fig. 2 (b) Single shooting Mode・・・・・・・・・・・・－Figure 2 (
i) Spot AF --- Figure 2 (j) Multi-point AF --- Figure 2 (g), continuous shooting/single shooting Regarding spot AF/multi-point AP, even if one of the functions (for example, continuous shooting) cannot be switched, it is always selected. However, since switching is not possible, it is not displayed.

The display shown in FIG. 2 (1) shows that the exposure compensator and film winding mode switching functions are selected, and that the exposure compensator side and single shooting mode are controlled.

Next, the exposure modes related to the exposure mode selection in (ii) above are: (b-1) Program mode (P mode) (b-2) Aperture priority mode (A mode) (b-3) Manual mode (M mode) ) (b-4) There is a shutter priority mode (S mode), P mode must be turned on as a basic rule, and the remaining 3
It is possible to select a combination of three modes (^, M, and S modes). Therefore, there are eight combinations: AMS MS AS AM A SM (as shown in Figure 2). The display is performed as shown in FIG. 2(n), for example, and one selected exposure mode is displayed at the time of photographing [FIG. 2(0) (A mode selection)]. In addition, when in P mode, PROGRAM
is displayed [Figure 2 (p)].

Next, to select the function of the AE lock button mentioned above (in), (C-1) Hold the camera power in the AE lock state while pressing the AE lock button (C-2) Press the AE lock button once Press the AE lock button again in the AE lock state, or turn the power hold OFF
The AE lock state is released, and this display is not displayed during normal shooting. When the settings are made based on the card, the display is as shown in FIG. 2(b) in (C-1) and FIG. 2(r) in (C-2).

Note that the shutter speed and aperture value are normally displayed in this area as shown in FIG. 2 (S). In FIG. 2(S), 1000 is the shutter speed and 5.6 is the aperture value.

Next, as a choice between the two functions, (d-1) film counter forward calculation or subtraction (d-1)
2) With or without auto-return at the end of the film (d-3) At the end of rewinding, part of the film leader is rolled into the cartridge or left outside the cartridge (d-4) With or without a camera shake warning buzzer (BZ); There are 16 possible combinations, and numbers are given to the combinations as shown in Table 2, and 0 is displayed as shown in Figure 2 (1) at the time of setting and other times. During normal shooting, this part serves as a film counter.

(It) Program card: The program card is used to control exposure programs and various camera controls, which are designed to take pictures of moving subjects in relatively bright places using a high-speed shutter that prevents camera shake. (Details will be explained later).

Next, we will explain the operation of the camera using a microcomputer (μC) shown in Figures 3 onwards.
) will be explained based on the flowchart, and each part will be explained in detail as necessary.

When the battery (E) is installed, the battery installation switch (S■)
turns OFF, and the terminal (RE) changes from “L” level to “H” level.
'' level is input, the built-in clock starts oscillating, and the clock is also sent from the microcomputer (μC) to the IC card (CD) via the terminal (φ). Then, the microcomputer (μC) executes the routine (RESI!T) shown in FIG. In that routine, the microcomputer (μ
In C), first, an initial setting is performed after the battery has been installed (#5). This subroutine is shown in FIG.

In FIG. 4, the microcomputer (μC) prohibits all interrupts to this flow and sets all output terminals to the "L" level. Also, reset all the flags in the RAM and set the flag (BATF) indicating when the battery is installed (11
00-1110). As a result, the exposure mode is set to P mode, spot/multi-point AF is set to multi-point AF mode, single shooting (S)/continuous shooting CC> is set to single shooting (S), exposure compensation, highlight (H
)/Shadow (S) mode is set.

The contents of this functional data are shown in Table 3.

Next, check whether the mode setting card of the two types of IC cards mentioned above has been installed at least once and the mode setting has already been performed using the contents of the EtPROM (MSb to be described later).

It is detected by examining the contents of If this is not the setting method, interrupts due to IC card installation (CDIN
? ) Disables interrupts other than interrupts and returns (#135,
$1140). If using the mode setting method, the contents of E"FROM (MSb described later) can be used to determine which mode is set.
.

~MSb,) and determines the part where the changed data is to be displayed. Highlight/Shadow mode (l(/
S mode), exposure compensation mode (+/- mode).

Single shooting/continuous shooting switching mode (S/C mode), spot/
It is detected whether the mode is set in the order of multi-point AF switching mode (S/A mode), and if it is set, change data for the first set mode is set (045-1182). RAM change data and E”F
ROM setting mode data are shown in Tables 4 and 5. Note that the steps (1145 to #182) correspond to determining the position of a cursor, which will be described later, in terms of display.

Next, in order to display these setting modes, control is performed to send data to a display control circuit (DISPC).

First, set the terminal (C5DISP) to the rH level, notify the display control circuit (DISPC) of data communication, create data, perform serial communication, and when the data transfer is completed, set the terminal (C5DISP) to the "L" level. and outputs the end of serial communication to the display control circuit (DISPC) (
1185-1200).

To briefly explain the operation in the case of serial communication, first, a clock is output from the serial clock terminal (SCK) in response to a serial communication command. In synchronization with the rising edge of this clock, the output side outputs one bit of data, and in synchronization with the falling edge of the clock, the input side outputs data in bits. By doing this as many times as necessary, the necessary data can be obtained.

An example of a display in a normal photographing state is shown in FIG. 2(u).

In the example of Fig. 2 (u), the displayed contents include shutter speed (1000), aperture value (5, 6), and AE.
Mode (PROGRA?I), film 1 (with or without film) (17), and function mode (shape shown in the bottom row) are displayed, and the above normal case and IC
1 byte (8 bits 256
It is sufficient to prepare one each. Display control circuit (
DISPC) inputs these signals and decodes them to display a predetermined display.

Now, the necessary data is bit (MSbs) data in the E"PROM to display the shutter speed and aperture, and E"PI? data to display the AE-1-- code. OM bits (MSb6 to MSba), E”PROM bits (MSbQ to MSb, □) to display the number of films,
Regarding the function mode, EtPROM bits (Sb6 to -5b4), change data bits (C
Db, ~cob, ), the microcomputer (μC) processes these data and provides it to the display control circuit (DISPC) as display control data.

An example of the display displayed on the display unit (DISP) in this manner is shown in FIG. 34(a). In the figure, (1) is a cursor. The microcontroller (μC) is (11205) and is 0.
Wait 5 seconds and let this display run for 0.5 seconds. Then, the number of films stored in E”PRO- is N1 (MSbt
z~MSb+e) Film sensitivity Sv (MSb + q
~? lsb, ,) and determines the number of films in the RAM N6. Transfer to film sensitivity Sv. After that,
Card data communication I is performed to know whether an IC card is installed and the type of IC card (1210).

The subroutine of this card data communication I: / is shown in Fig. 5 (a
). In the same figure, 1. First, the terminal (CS) is used to notify the IC card (CD) of communication with the IC card (cO).
CD) is set to rH level, set to data output mode, and send data indicating data communication (see Table 6) to the IC card by serial transfer (1300 and 305).
).

A microcomputer (μC) takes a certain amount of time to input this information on the IC card (CD) side, create the necessary data, and output it.
) waits (1310), and now data is sent from the IC card (CD), so it operates in input mode,
Perform serial transfer with IC card (CD) (1!315
), and when this is completed, the terminal (CSe port) is set to the "L" level (1320).

Next, the type of IC card is determined in (11321), but if it is a mode setting card, the data only indicates the type of IC card, so the process immediately returns.
On the other hand, in the case of a program card, the data includes not only the type of IC card, but also the AF mode continuous/one shot (details will be described later), AF zone spot/multipoint, metering zone spot/multipoint, continuous. Since function data indicating either photo/single photo shooting or no particular specification (setting by the photographer) is included, it is then determined whether the card function is selected (I322 )
, when the card function is selected (CDFNF-1), the function data Fbs, Fb3. Fbs, Fb+
Rewrite the bit of t and set the data 1323),
Return. - On the other hand, if the card function is not selected, the process returns without rewriting the data.

Returning to Figure 4, the microcomputer (μC) inputs the input data (
It is determined whether an IC card is installed (see Table 7), and if it is not installed (Ckbo = 0), the process returns without displaying the type of IC card. IC
When the card is installed (Ckbo=1), the IC
Determine the card type and select the mode setting card (Ckbt-
Ckbi-00H1 (here, indicates hexadecimal), display data for this IC card (Ckb+~Ckbi
1230), program card (Ckb,
~Ckb&=018) Display data for program (
Ckbv~Ckba) is created (1245), and
In these cases, the above data Ckb+"'Ckbi and the IC card installation data Ckbs are respectively set as the display data of the shutter speed display section, and the other display data is set to "0" (not set). is sent to the display control circuit (DISPC) (12
50 to 11260) is displayed for a certain period of time (0.5 seconds).

Figures 34(b) and (C) show display examples in this case, and Figure Cb) shows the display when the program card is installed;
Figure (C) shows the display when the mode setting card is installed. Here, the characters PRO and F-5E are the bits Ckb l
~Ckb& and CARD depends on Ckbo.

The microcontroller (μC) waits for a certain period of time for this display (
1270), then enable all interrupts (12
71), proceed to step (110) in FIG.

In FIG. 3, after completing the initial setting (15), the exposure mode change switch (Sin), function change switch (SFM), and card function enable/disable switch (SCo) are activated.
) Card data setting switch (Scos), ij
Whether any of the optical switches (So) is turned on is determined in step (110) based on the level of the terminal (IPs), and if none of the above switches is turned on (IPs='HJ), It is determined in step (115) whether or not the battery installation flag (BATF) is set, and if it is set, the process jumps to step (145) assuming that this step has been reached without doing anything after the battery is installed. , control to turn off the display and stop the IC card (CD) according to the flow after step (145). First, all data is set to "0".
” (not set), and this data is sent to the display control circuit (
DISPC) (I45 to I60). Therefore,
The display will be completely off. Note that a command for turning off all lights may be provided and outputted to the display control circuit (DISPC), so that the display control circuit (DISPC) turns off all lights in response to this.

The microcomputer (μC) sends the turn-off data to the display control circuit (DISPC) as described above, and then sends a sleeve sign (instruction to stop the IC card) signal to the IC card (CD) (165 to 175). is formed by bits Csb and Csb both becoming 1 as shown in Table 6.

After that, the transistor (Trt) is turned off by setting the terminal (4) to rl and J, and the flag (AELF) indicating the AE lock and the flag (BAT) indicating when the battery is installed are turned off.
F), and all interrupts are enabled and stopped (clouds 77 to #95). Note that this stop (IALT) also stops the oscillation of the built-in clock.

In the above step (1110), five switches (
SEX), (Srg), (Sco), <5cn
If one of s) and (So) is turned on, the process proceeds to step (190), and a flag (B) indicating when the battery is installed is set.
ATF) and the next step (#10
0), sets a flag (OPF) indicating that one of the above five switches has been operated, and executes the routine [SO3
is executed, and the process returns to step (110). Routine [SO3 is a routine for performing photometry, AF, display, exposure control, etc., which will be described in detail later.

In step (110), when none of the five switches are turned on and the battery is not installed (
BATF=O) has a -degree routine [115.1125] that determines whether or not the flag (OFF) that is set when passing through SO3 is set; if this flag is set, the power supply Retention timer (
T1) is reset-started, and the flag (OPF) is reset (#30.#35). Here, the timer (T1) is reset.
I) is reset-started (1130) by -degree steps (1110) to (1190) ($1100)
) and went through the routine (Itloo), but currently none of the five switches are pressed, but this is to extend the power hold for a certain period of time in consideration of the possibility that they may be turned on again. , the flag (QPF) is reset (#35) to indicate that step (1130) has been passed.

In step (125), if the flag (OPF) is not set, step (1130) (1
135) and detect whether or not 10 seconds have elapsed for the reset-started timer described above (1140).
, If 10 seconds have elapsed, proceed to step (1145) and subsequent steps to turn off the display and stop the IC card (CD).If 10 seconds have not elapsed, proceed to step (+11).
10) and repeat the routine of [SO3].

Next, we will explain how to control the camera when an IC card (CD) is inserted.
A signal changing from the "L" level to the "rH" level is input to NT), and the interrupt routine (COINT) shown in FIG. 4 is executed. When entering this routine, the microcomputer (μC) sets a flag (OFF) to stop driving the lens and maintain power (1290.11292).
. Then, in order to forcibly add the card function, a flag (C
DFIIIF) is set (1293), and a flag (CDIF) is set so as not to display the card type in the display control described later (1294). The cent of this flag determines the routine after card installation (1 at SO3).
The type of installed card is always displayed the first time. next,
Step (
+1295) to prohibit all other interruptions to this flow, proceed to step (11210) and subsequent steps, and change the type of IC card as shown in Figure 34 [Yes]) or (C
) is displayed for a certain period of time, all interrupts are enabled, and the original flow returns [step (a30) in Figure 3].
Return to hell. Switch (SEX), (SFM) with its interrupts enabled.

If any one of (Sen), (Sces), and (So) is turned on, the interrupt terminal (INT+) is rH.
When a signal that changes from the .

In addition, stop (HALT)! , any interrupt [rstt) (INrg) or (CDINT
), the clock starts oscillating, and the clock (φ) is also sent to the IC card (CD).

Next, the above routine (SO) will be explained with reference to FIG.

First, interrupts of (INT,) to this flow are prohibited (11400). This is because if the interrupt (INT+) shown in Figure 3 occurs during the main control, the control operation will not proceed further.
By setting the terminal (PW) of C) to H level and applying a low level to the base of the PNP transistor (Trt) via the inverter (IN, ), the transistor (Trt) is turned ONL and the photometric circuit (LM) is turned on. ), supplies power to the AF circuit (Apct), etc. Next, the lens circuit (L
Enter information specific to the interchangeable lens from E) (1410)
.

This is shown in FIG. 7 and explained. First, the terminal (CSLE
) as rH and level (1600), serial communication is performed to input information from the lens (11605), this information includes whether or not the lens is attached, the aperture f-number (A
VO) l maximum aperture value (Avg+ax) + distance information, focal length information, a coefficient for converting the defocus amount into a lens drive amount (hereinafter referred to as "rK value"), etc. After inputting the lens information, connect the terminal (C5LE) to rl,
Return to J level (1610).

Returning to Fig. 6, the microcomputer (μC) continues to input electronic flash device information from the electronic flash device (ST>).The information includes a guide number (GN) indicating the amount of light emitted,
There are three types of information: whether the battery is in a fully charged state, whether it is in forced light emission, or whether it is in automatic light emission (this will be described later). Here, we will explain the operation of the information communication method.First, Fig. 9(a) shows an electronic flash device (ST),
FIG. 9(c) shows a circuit diagram of the interface (IF), and FIG. 8 shows a flowchart for inputting data from the electronic flash device of the camera.

In Figure 8, the microcomputer (μC) has a terminal (CSST
) for a certain period of time (tl) and outputs this signal to the electronic flash device (ST) (11650).The electronic flash device (ST) detects the time (1+) of this signal and outputs data. It recognizes the mode and outputs data according to the clock from the microcomputer (μC) (1655).

In the interface circuit (IF) shown in Figure 9 (b), the signal of the terminal (CSST) of the microcomputer (μC) is passed through the OR circuit (ORi+) to the terminal (ST, ) of the electronic flash device.
Output to. At this time, both signals input to the OR circuit (OR□) are at the "L" level. In an electronic flash device (ST), the signal from the terminal (STυ) is passed through an AND circuit (
AND++), so it is input to the AND circuit (AND
(2) becomes active and outputs the signal from the oscillation circuit (OSC) to the counter (CNT It). The counter counts this and measures the time (1+).

When the time (tl) is counted, the terminal (TI) is set to rH level and the RS flip-flop (SRt+) is set.

At this time, the RS flip-flop (SR+z) remains reset, and its output page is at rH, level. Therefore, the AND circuit (AND+t) becomes active.

Next, the microcomputer (IC) uses a serial communication clock (
SCK). This clock (SCK) is output to the terminal (STυ) of the electronic flash device (ST) via the OR circuit (OR!l) of the interface circuit (IF). (SCK) is manually input to the clock terminal of the parallel/serial conversion circuit (P/S) via the AND circuit (AND+g).This parallel/serial conversion circuit (P/S) is connected to the guide number (GN ), Signal 1 indicating charging completion status Outputs a signal indicating forced flash or automatic flash in synchronization with the clock.Electronic flash device (ST) counter (CNTI)
t) counts the input clock (to SC), and when a predetermined required number is counted, the "H" level is output to the OR circuit (
Output to OR,,). This signal is an OR circuit (OR,
, ) is input to the reset terminal of the counter (CNTI2) via the one-shot circuit (O5z), and the counter is reset. The counter (CNT11) is a counter that is reset after counting a predetermined number of clocks.

In addition to the circuit elements described above, the electronic flash device includes a battery (Est) as a power source, a booster circuit (UV) for boosting the voltage of the battery to the voltage required for flashlight emission, and a voltage from the booster circuit (UV). A rectifier diode (D) that rectifies the output voltage, a main capacitor (MC) that stores the energy necessary for flash light emission, a charging voltage detection circuit (CVD) that detects the charging voltage of the main capacitor (MC), and the start of light emission. and a light emission control circuit (FCC) that performs stop control B.
)have.

Returning to Figure 6, after the microcomputer (μC) inputs the above flash data, it exchanges card data with the IC card (CD) in order to determine the Ill of the IC card (CD).
(1420). Since this card data communication (2) has already been explained with reference to FIG. 5, the explanation will be omitted here. After communicating the card data, it is determined whether or not the flag (SETF) indicating that the IC card is inserted and the data setting mode is set is set (114).
25), and if it is not set, check whether the AF start switch (Sυ) is ON or not by checking the terminal (IP&
) (1427), and if the switch (S+) is turned on (Ih-'LJ level), AF control is performed (1429). On the other hand, when the flag (SETF) indicating the data setting mode is set or the switch (Sl) is set to 0FF (IF, =
'HJ level), to prohibit AF operation,
A signal to stop the AF drive motor is sent to the lens control circuit (L
ECN) to stop the lens drive (11431)
, sets a flag (8FNF) indicating that AF is not being performed (1435). When the data setting mode is set in this way, by prohibiting AF control and giving priority to data setting, it is possible to prevent accidental AF control during data setting.
AP operation is not performed even if the F start switch (S,) is pressed.

Here, for the above-mentioned AF system'< BI, Fig. 1O(a)
The flowchart shown in FIG. 10(b) will be explained with reference to FIG. 11 showing the focus detection range in one shadow screen.

At that time, the photometric range will also be explained.

First, in FIG. 11, the outer rectangle (2) indicates the photographing screen. Among them, (LMI) to (LMa) indicate the photometry range, and (API) to (AF3) indicate the focus detection range.

Regarding the focus detection range, the camera has a spot/focus detection range.
Multi-point AF can be switched, and when Spora 1-AF is selected, AF is performed based on subject information in the focus detection range (AFz), and when multi-point AF is selected, the above three ranges are AF is performed to focus on the subject closest to the camera from among (8Fl) to (Ah). Hereinafter, (API) will be referred to as the first island, (Ah) as the second island, and (AF3) as the third island.

AF control (1) shown in the flowchart of FIG. 10(a)
To explain, first, it is determined whether or not the lens is attached based on the input signal from the lens (1705).
). Next, if a lens is attached, it is determined whether the focus adjustment mode is the AF mode based on the level of the terminal (ip, .) (1710). And step (17
05), the lens is not attached, or (171
0) and not in AF mode (manual mode).

If IP+*='HJ level), a flag (8FNF) indicating that AF is not being performed is set and the process returns (1800).

On the other hand, when the AF mode is selected (IPt.

x rl,, level) resets a flag (AFNF) indicating that AP is not being performed (1715). The microcomputer (μC) controls the accumulation (integration) of the charge generated according to the amount of incident light in the COD for distance measurement, and after the integration is completed, the data obtained by digitally converting the integral value is input (cloud 720). .ll'(25), and spora 1
-Detect whether it is AF or not (detected by pbt of function data),
If it is spot AF (Fbt-1), set a flag (AF2F) indicating that AF is being performed based on the second island, and calculate the day focus amount (DF refraction) of the second island from the input data. is calculated and set as the defocus amount for lens driving (cloud 735 to building 745).
).

On the other hand, when the multi-point AF mode is selected, the first
．． Second. Calculate the day focus amount (mouth F) of the third island, and calculate the day focus amount for the subject closest to the camera among the above (1750 to 1765)
, this subroutine for determining the day focus amount is carried out in the 10th subroutine.
As shown in Figure (b), the current day focus amount is negative when the front focus (the subject is further away from the lens focus position), and negative when the rear focus (the subject is closer to the camera than the lens focus position). indicates a positive day focus amount, and its absolute value indicates the day focus size.To detect the subject closest to the camera, the maximum (positive, It is sufficient to detect the day focus amount (including negative values), and it is assumed that the main subject exists in the focus detection area.

In Figure 10), the microcomputer (μC) first resets the flags (AFIF-AF3F) indicating the island,
The largest day focus island is detected, the detected island day focus amount is set as the day focus amount for lens driving, and the flag (A) is set according to the island.
FIF to AF3F) and return (position 81).
0-1865).

Returning to FIG. 10(a), the microcomputer (μC) determines whether or not the lens is in focus based on the day focus amount for driving the lens (#770).
When the focus is determined, the flag (A
FEF) (1780), and the focus buzzer will sound for a certain period of time to notify you of this (11782).
Return. If it is not in focus in step (1770), either one-shot AF (-once in-focus stops subsequent lens driving, and focus detection may also be stopped at this time) or continuous AP (after in-focus In the case of one-shot AF (pbs-0), it is determined whether the lens follows the subject and drives the lens according to the determined defocus amount using data Ckbs (described later). Flag indicating focus (AF[!
It is determined in (1783) whether or not F) is set, and if it is set, the process returns. If it is not set or if continuous AF is used (p.
b*=1), proceed to step (1785) and control the lens drive. In step (1785), the lens drive amount (N) is calculated by multiplying the day focus amount (OF) by the value. and then step (11790)
The lens is driven at step (1795), and the flag (AFEF) indicating focus is reset at step (1795), and the process returns. The lens driving in this step (790) is performed by the lens driving circuit (LBCN) driving the lens by a value corresponding to the driving amount (N).

Returning to FIG. 6 again, the microcomputer (μC) controls changes to various data by operating various key switches (1440).

To explain this as shown in FIG. 12, first, the state of each key switch is checked and this is stored in memory (11900).

Next, set the flag (SET) indicating that the card is in card setting mode.
It is determined in (11905) whether the flag (St!F) is set, and if the flag (St!TF) is set, the process proceeds to step (1930) so as not to change the exposure mode or function. SETF) is not set, the process proceeds to step (+1910) and it is determined whether the exposure mode change switch (StH) is turned on. Here, when the switch (Sxw) is ON, this change subroutine (1915)
Go to and return (details will be explained later), press the above switch (S
I) is not ON, step (1920
) to determine whether the function change switch (SFX) is turned on. When this switch (SFX) is turned on, the subroutine for changing it (I9
Proceed to step 25) and return.

Here, the above two subroutines are shown and explained in FIGS. 13 and 14, respectively. First, the exposure mode is changed.
Each time the up switch (Sup+ or 5upt) is turned on, the process progresses cyclically, such as sequentially going from PEA → S → M and then returning to P, and the down switch (Sdn or Sdn Mayuzumi) is turned on once. sequentially P-A4-S
It moves cyclically in the opposite direction to the above-mentioned up direction, such as +-M, and then P and then M, but it depends on the exposure mode set by the IC card (CD). Modified and unselected modes are skipped.

To explain this with reference to FIG.
) is the up switch (
Sup+ or 5up2) is turned on. If not, step (11055
), or if it is ON, proceed to step (110).
05), and (Fb) of the RAM function data (Fbn).
o) (Check Fbo and determine whether P mode is currently selected as the control exposure mode. If it is selected, proceed to step (*t010) and internally check whether A mode is selected by the IC card. E”FROM (Msb,) to (Msbs) (see Table 4). ,0) to (
0, 1) and return (11015). In the above step (11010), the A
When it is determined that the mode is not selected, the process proceeds to step (11025), and it is determined whether the S mode is selected. If the S mode is not selected, the process further proceeds to step (11040), and the M mode is selected. is selected, the selected mode is sequentially searched by card, and if there is a selected mode, it is set. Then, when the A, S, and M modes are not selected, that is, when only the P mode is selected, the P mode is selected (11050).

Similarly, when A mode is currently selected as the control exposure mode (FbO, Fb, = 0.1), S mode is selected by the IC card, or M mode is selected if it is not selected. is selected, changes the exposure mode to the selected mode, and selects the bit (Fb
o) Change , (Pbl) and return (1110
20-1030).

Now, when S mode is selected as the control exposure mode (FbO, Pbl = 1.1), M mode is IC
Determine whether it is selected by the card, if selected, set to M mode, if not selected, P
mode and return (HO35-1045). When the control exposure mode is not the S mode, that is, when it is the M mode, the mode then becomes the P mode. This is because the P mode is always selected in this embodiment.

In step (11055), the down switch (Sd
When the up switch (S or n or 5dnz) is turned on, the up switch (S
up+ or 5L19z), so the explanation will be omitted.

In addition, both switches (Sup) (Sdn) are OFF.
If F, do nothing and return.

Next, the function change switch (SFX) shown in Fig. 14(a)
The control when is turned on will be explained. Microcomputer (μC)
has the four functions mentioned above, namely Highlight/Shadow (H/S), Exposure Compensation (+/-), Single Shooting/Continuous Shooting (S/
C) Check whether at least one of Spot AF/Multi-point AF (S/A) is selected by checking the E"PROM bit (
Msbo to Msb3), and if none of these bits are set, it is determined that there is no mode selection and the process returns (111200). If at least one is set, it is assumed that at least one mode is selected, and the step for changing data (112
05) Execute the following flow. The microcomputer (μC) is
It is determined whether the switch (ssi) indicating the function to be changed is turned on or not, and if it is turned on, the function to be changed advances in the order of H/S→+/−→S/C-hS/8. , S
After /A, the process proceeds cyclically, returning to H/S, but if no function is selected by the IC card, it is skipped over.

In step (+11210), when the function to be changed now indicates the l/S mode (R shown in Table 5),
A data CDbo, CDb+, CDbz=0.0.
O), +/- mode is selected by the IC card in step (11215) with E2PRO bit (
MSbl), and when the 10/- mode is selected, the data change mode is set to the 10/- mode, and the data CDbe~CDb! Returns as =0°0.1 (+11220). ÷7- If the mode is not selected, proceed to step (H227), determine whether the S/C mode is selected by (MSb2), and if this is also not selected (MSb!=0). is a step (
11240) to determine whether the A/S mode is selected based on (MSbs), and if this is not selected (Msbi=o), proceed to step (11250).
Proceed to ) Determine whether l/S mode is selected (MSbJ. At least l/S mode is selected now, so in order to change II/Sl/S mode, select CD
b, ~cobt-o, o, o. S/C mode.

When the ^/S mode is selected, set this as the mode to be changed to CDb, ~cnbz.

Similarly, the next mode (
It/Sl/S mode/- mode, S for +/- mode
/C mode, S/C mode is S/A mode, S/
In A mode! 1/S mode) is selected by the card, and if it is selected, the change mode is set to the next mode, and if it is not selected, H/S→+/
−→S/C→S/A −1/5−−−−− Search for the function selected by the IC card in order, and select the selected function as the function to be changed with data cob, ~CDb2
Set and return.

As can be seen, modes not previously selected by the card will be skipped with respect to the change mode. For example, if the selected changeable mode is +7- and S/C
If the function change switch (S8) is pressed, the flow goes to step (#1225), and then to step (H227), where the S/C mode becomes the mode to be changed. To put this on the display, the cursor is ÷
/- means moving to S/C. Next, when the function change switch (SF, 4) is pressed again, the flow goes to step (H235) and from there to step (11).
1240)→01250)→(11215),
+7- becomes the mode to be changed, and the cursor on the display moves to 10/-. In these cases, H/S mode and A/S
Since no mode has been selected, there will be an effective skip over the setting of the change mode.

In step (111205), switch (Sst
) is not ON, step (11265)
Proceed to.

In step (111265), the up switch (Sup
+ or Supg) is ON, and if it is ON, determine which functions should be changed based on the data (CDbo to CDbz), and if in H/S mode, all settings are changed. data (pbi)
(pbt) and selects the next mode (→H434
11270.1 In order to move from no H/S to cyclic progress, set the data (Fbi) and (Fbt).11270.1
1275), return.

If the function is +7- mode, 0.5 is added to the exposure correction amount (ΔEv) in (11285), and the process proceeds to a subroutine (11287) for determining the magnitude. This subroutine is shown in FIG. 14(b). If the correction amount (ΔEv) is positive, the data Fba, Fbs = 0.1 is considered as a positive correction.
If the correction is on the negative side, the data Fb4. Fbs-1,0
Then, if the correction is zero, no correction is made, data Fbn, Fbs = 0, 0, and return (11
1350-11370).

Returning to Fig. 14(a), if it is S/C mode, it is determined whether the current mode is single shooting (S) or rapid shooting based on the data (Fb3), and the mode is set to be opposite to the current mode. Change the data (11295) and return. When it is not in any of the above three modes (H/S mode, +/- mode, S/C mode), that is, when it is S/A mode, the current mode is Spot 8F (S) or Multipoint AP (A ), and change the data (Fbz) so that it is opposite to the current mode.1i13
00), return.

In step (11265), the up switch (Su
p or 5upt) is not turned on, step (
#1305) and press the down switch (Sdn or 5
dnz) is turned on, and if it is not turned on, returns. If it is turned on, H/
When changing the mode within S mode, the order of change must be reversed (←H4-34-H/No S←), and +
In 7-mode, 0.5E from exposure compensation amount (ΔEv)
Except for subtracting v, the flow is the same as when the above-mentioned up switch (Sup or 5upz) is ON, so
Descriptions are omitted (11310-11340).

Returning to Figure 12, exposure mode change switch (Svx)
.

When both function change switches (SFN) are OFF, the aperture value (Av) by the up switch (Sup+, 5upt) and down switch (Sdnl, 5dnz),
The process advances to step (#927) showing a subroutine for changing the shutter speed (↑ν).

This subroutine is shown in FIGS. 21(a) and 21(b), and will be explained first.
It is determined in step (11800) whether or not the down switch (p+ or 5upz) is turned on, and if it is not turned on, the process proceeds to step (tta05) and it is determined whether the down switch (Sdn+ or 5dit) is turned on. Returns when it is not turned on. Up switch (Su
When p+ or Su+) is ON, step (
11800), the process proceeds to step (11810), and it is determined whether or not the M mode is set. Here, when the mode is M (Fb, , Fbl = 1.O), it is determined whether the second up switch (Supz) is turned on (1.
1B25). When turned on, the shutter speed (T
v) as a change in the current shutter speed (Tv
), add 0.5Eν to the new shutter speed (T, v
) value and determine whether this exceeds the maximum shutter speed value (Tvmax) that can be controlled by the camera (
$11850.11855). If this value is exceeded, set the maximum shutter speed (Tvmax) as the shutter speed (Tv) value; otherwise, return without doing anything (11860) Step (11825)
), when the second upswitch (Supg) is not turned on, that is, when the first upswitch (Sup, ) is turned on, the aperture value change mode is assumed, and the aperture value (Av) is set to 0 in step (11830). .5Ev is added and it is determined whether this exceeds the maximum controllable aperture value (Avmax) (11835). If it exceeds the maximum aperture value (Avmax), the maximum aperture value (Av
wax) 11840), and if it does not exceed step m845), proceed to step m845) to determine whether the mode is P mode or not.
Proceeding to step (#1905) of the flowchart shown in Figure 1, the shutter speed (Tv) is decreased by 0.5Ev. Returns if not in P mode.

If it is not the M mode in step (111810), the process proceeds to step (111B15), where it is determined whether the mode is P mode or A mode, and either P mode or A mode (Fb6.Fbl -0, 0 or 0.1), proceed to step (11830) and set the aperture value (Av).
When it is neither mode, that is, S mode (Fbo, Fbl-1, 1), step (1) is performed.
1850), the shutter speed (Tv) is increased.

When the down switch (Sdnt or 5dnt) is turned on in step (11805), FIG. 21(b)
Proceeds to step (11865), determines whether or not it is in M mode, and when it is in M mode (Fbo, Fbl
-L, O), Determine whether the second down switch (Sdnt) is turned on (11880), If the second down switch (Sdnt) is turned on, the shutter speed (Tv) is reduced to 0. .5[! Subtract ν and return (11905).

When the second down switch (Sdnx) is OFF, the aperture value (Av) is decreased in step (11885).
0.5Ev is subtracted, and then in step (*1890) it is determined whether the value is smaller than the open aperture value (Avo), and if it is, the aperture value is set as the open aperture value (Avo) (11895).

Next, step (11900) determines whether it is in P mode.
Judge by. In the step (111890),
If the aperture value (^V) is not smaller than the open aperture value (Av.), step (11895) is skipped and step (11900) is entered. This step (W1900)
If the determination is that it is P mode, the control flow for increasing the aperture value shown in FIG.
Proceed to , and return if not in P mode.

In step (11865), if the mode is not M mode, in steps (11B70) and (1875), P
It is determined whether the mode is P mode or A mode, and if it is P mode or A mode, step (111885
), proceed to the flow for controlling the aperture value reduction, and if not, proceed to step (119) assuming that the S mode is in effect.
Proceeding to step 05), the shutter speed is controlled to decrease.

Returning to FIG. 12, after going through step (1927) indicating the subroutine for changing the aperture value (Av) and shutter speed (Tv) mentioned above, or in step (11905), the flag indicating that the card setting mode is set is set. After it is determined that the flag is set, the process advances to step (1930).

This step (1930) includes a normally open switch (S,
! . ) is turned on, and if it is turned on, the card function in step (1935) is enabled.

Proceed to the invalid switch-on C3eD ON) subroutine.

This is shown and explained in FIG. 15. First, step (11
400), it is determined whether the IC card (CD) is loaded in the camera based on the data (Ckb@) and the IC card (CD) is loaded into the camera.
If no card is loaded (Ckb@-0), return immediately. When the mode setting card is loaded, the card function enable/disable switch (SC0) is operated and the flag (CD
F) is set (11405
). If it is set, it is assumed that the enable/disable switch has already been completed during the operation and returns. If it is not set, proceed to the next step (1141
0), sets this flag (CDF), and then in step (11415) determines the flag (CDFNF) indicating whether the card function is valid/invalid, and if it is not set, sets it to enable the card function. Toshiki 11
420), if set, resets the card function to disable it (11425) and returns.

The flow when the card function enable/disable switch (ScD) is ON in the determination at step (11930) in FIG. 12 was explained above in accordance with FIG. 15. When the invalid switch (SCO) is OFF, step (194)
Proceed to 0).

The flow of this step (1940) will be explained with reference to FIG. 16. First, in step (11450) it is determined whether or not an IC card is installed, and if the IC card is not installed (data Ckbo = O). returns, and when the IC card is loaded (Ckbo = 1
) proceeds to step (11455) and determines whether or not a flag (CDF) indicating that the flow after step (111405) in FIG. 15 described above has been set is set. If the flag (CDF) is set, it is reset in the next step (11460) and the process returns; if the flag (CDF) is not set, the process returns directly.

Returning to FIG. 12, the microcomputer CaC) then steps (1)
945) is a normally open switch C3 that changes the mode using an IC card or sets or resets the data setting mode.
cns) is determined to be ON or OFF, and if it is ON or OFF, the process returns through steps (1955) and (1950) related to the control of the respective subroutines. This will be illustrated and explained in FIGS. 17 and 18.

First, Figure 17 shows the subroutine when the switch (ScDs) is turned on, and the microcomputer (μC)
determines whether the mode setting card is installed in step (111500), and returns immediately if the card is not installed (Ckb+=Ckb*≠0ON). If a mode setting card is installed (
For Ckbl~Ckbi-00+<), check whether the flag (CDSF) indicating that this flow has been passed once is set (11510), and if it is not set, set it (11515). If so, skip step (11515) and return.

Next, O of the switch (Sces) shown in FIG.
To explain the FF subroutine, first, it is determined in step (11550) whether or not a mode setting card is installed, and if it is not installed (Ckbl~Ckb, ≠00
H), return. If installed (Ckb
+~Ckbi-GoH), the switch (Sc.

, ) has been operated and the flag (CDF) indicating that the flow of (5cfls ON) has been executed is set (11555), the flag (C
DF) is not set, returns (Ii
555), when the flag (COP) is set, it means that the switch (Scos) has been turned on or off to enter or cancel the data setting mode, and in order to determine either of these, Determine whether the flag (SETF) indicating the data setting mode is set (11560), and if it is determined that it is set, reset the flag (SBTF) in step (11570) , followed by the step (
1115?2) to set the flag (WRTF) indicating data writing to E"FROM, and switch (Scot)
) is completed, the flag (CDF) is reset in step (11575) and the data setting mode is canceled. If it is not set, this flag (SETF) is set as a transition to data setting mode (11565)
At the same time, the flag (CDSF) is reset (l111
575), return.

After completing the key setting control shown in FIG. 12 as described above, the microcomputer CaC) moves to step (1) in FIG.
1440) to step (■442), where I
Determine whether or not a flag (SETF) indicating that the C card is installed and in data setting mode is set;
If it is set, the process advances to step (1455) to execute the card data communication routine (2) to be described later. If it has not been set, the process advances to step (1445), where photometric data is input from the photometric circuit (LM) and a spot photometric value used for exposure is created. Here, creation of photometric values will be explained with reference to the photometric range shown in FIG. 11 and the flowchart for inputting and creating photometric data of the microcomputer (μC) shown in FIG. 19. In FIG. 19, the microcomputer (μC) first sends a flag (AELF) indicating AE lock.
) is set (step 11600)
If the flag (AELF) is set, the photometric value is not updated and the process returns. When the flag (AELF) is not set, the terminal (
Set C5I, C) to “I(” level) and turn on the photometry circuit (LM).
It issues a command to output photometric data to the device and performs serial communication (#1605, w161G).

Through this communication, the brightness values (BVI-BVI) of the four photometric ranges shown in FIG. 11 are input. When communication is completed, set the terminal (C5LM) to "L" level (11615)
.

Then, in the next step (11620), it is determined whether spot metering is selected, and if it is selected (
+”b+z=1), brightness value (B
vz) as the spot value (Bvsp) ($1660)
. When in multi-point mode (Fbl□-〇), step (
111620) to (#1622), it is determined whether or not the flag (AFNF) indicating that focus detection is not possible is set. If it is not set, the process proceeds to step (111660), where the small photometer in the center is detected. range(
Lh) is returned as the spot value (BV!1p). When the flag (AFNF) is set, image magnification β is calculated from β = focal length/distance based on the distance information and focal length information input from the lens (11625).
At the same time, in the next step (11630), it is determined whether this image magnification β is greater than or equal to a predetermined value (K), and the size of the subject occupying the photographic screen is determined. If the value is greater than or equal to the predetermined value, it is assumed that the subject is large and the brightness values (Bv+) and (Bvz) of each photometry range (LM+), (LMt) and (LM3) are determined in step (111640).

The average of (BV3) is the spot photometric value (Bvsp),
Return.

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, the range is determined based on which flag (APIF-AP3F) indicating the focus detection range is set, and if the flag (8 PIF) is set, the photometry range (Lh, ) brightness value (BVI) If the l flag (8F2F) is set, the brightness value (Bvz) of the photometry range (L) When the day focus amount of AF3) is selected, the brightness value (BV:l) of the photometry range (LM3) is set as the spot photometry value (Bvsp) (il1645 to 111).
665).

After determining the spot photometry value in this way, the microcontroller (
The IC) proceeds to step (1450) in FIG. 6 and performs control regarding the AE block, which will be explained with reference to the flowchart shown in FIG. 20. Furthermore, here,
To cancel the AE lock, use the AE lock switch (SAEL).
) is pressed once, the AE lock is applied for as long as it is pressed, and when the AE lock switch (Satv) is pressed again or the power self-hold is released, the AE lock is released (10 seconds hold mode) ) and a mode in which the AE lock state is maintained only while the AE lock switch is pressed, and these modes are selected by the IC card. In FIG. 20, the microcomputer (μC) first determines in step (11700) which of the two modes the mode is based on the E"PI?OM data (MSbs), and then enters a 10-second hold mode. At this time, the process proceeds to step (11705), and it is determined whether or not the AE lock switch (SAEL) is turned on. If it is not turned on, the AE lock switch is operated and the flow from step (11705) is executed. Reset the flag (8E 0NF) indicating that (+
+t'710) Return.

In step (11705), if the AE lock switch (SAEL) is turned on, the flag (AE
0NF) is set or not in step (11).
715), and if it is set, return immediately. If it is not set, step (#17
Proceed to step 20) to determine whether the flag (AELF) indicating that the AE lock operation is working is set, and if the flag (AELF) is not set, the AE lock operation is activated.
If the flag (AELF) is set, the flag (AELF) is reset as it is assumed that the operation was performed to cancel the block while the A20 block was in operation, and the flag (AELF) is set. Proceed to step (11735) and lock the AE lock switch (SAEL).
) is operated, sets a flag (8E 0NF) indicating that this flow has been executed, and returns.

At step (+11700), if it is not the 10 second hold mode, at step (11740)
Determine whether the E-lock switch (SAxt) is turned on or not, and if it is not turned on, set the flag (AELF).
) (11'?55), if it is ON, set the flag (AELFI) 1174
5) Reset and start the power supply holding timer (T t ) (11750), and return. In this way, when the AE lock switch (SatL) is turned on, the power is maintained.

In FIG. 6, after controlling this AE block, the microcomputer (μC) performs data communication with the card for the second time in step (1455). This data communication will be explained with reference to FIG. 5 (b). In step (@325), the microcomputer (μC) determines whether or not the card is installed, and if it is not installed (CKbo =
O) Return without data communication. If the card is installed, set the terminal (CSCD) to rl (J level (1330), output data to the IC card (CD) (1335)), indicating that the IC card is the input side, and then step (1340), it is determined whether or not the IC card installed in the camera is a mode setting card, and if the IC card is in data setting mode (C
Kb, ~CKbh-0ON), step (1
1900) to set the switch data sensed and memorized in 1344), and perform serial communication (134).
8) Output switch information to an IC card (CD). Thereafter, the terminal (CSCD) is set to the "L" level (350) and the process returns.

In the determination at step (1340), if it is not a mode setting card, that is, if it is a program card (CK
b+~CKbh"'O1n), exposure calculation data, which is data necessary for exposure calculation, and flash data.

and lens data, perform serial communication, output these data to the IC card, and connect to the terminal (CSC).
D) is set to the "L" level, data communication is completed, and the process returns (1346 to 11350).

Note that the data for exposure calculation is the photometric value (Bvs).

(BvA?) There is data indicating film sensitivity (Sv> and positive film or negative film), lens data includes focal length data, open F value (Avo) + maximum aperture l1l (Avaaaχ), and flash data includes Data indicating whether the flash is forced to fire or automatic, data indicating whether the flash is not installed (including when the power is OFF) is ON
(guide number), data on whether charging is complete, etc.

When the above-mentioned card data communication (■) in FIG. 6 is completed, the microcomputer (μC) proceeds to step (1460) and performs exposure calculation here.

The flow of this control is shown and explained in FIGS. 22 to 26. First, the microcomputer (IC)
000), it is determined from the input lens data whether the lens is attached, and if it is not attached, the photometric value (BV□)(
Instead of this, the overall averaged photometric value may be used), film sensitivity (Sv) and exposure compensation value (ΔEv) are added,
Calculate shutter speed and return (112005)
, if a lens is attached, exposure calculations are performed according to each exposure mode (I201O to 12040).

Therefore, the exposure calculation for P mode is shown in Figures 23(a) to (C).
To explain it as shown in the figure, the microcomputer (μC) first
In step (112100) of Figure (a), the backlight condition is determined using the photometric value (ay□) of the photometric range (LM4) and the spot photometric value (Bvsp) obtained in step (1445).
It is determined whether the difference is 2Ev or more (1121
00). If it is 21iv or more, it is determined in step ($12105) whether or not the electronic flash device is ready to emit light (the main capacitor is fully charged), and if it is ready to emit light, the terminal (FLOK) is connected to r)( Set to J level (12110) to enable flash photography and control exposure value (
Ev) from the photometric value CBvaM) of the photometric range (LM<), etc. Ev = Bva, 4+^vo +Sv-1+ΔEv
(12115) Here, l is subtracted to make the background appear to be backlit by IEv. In addition, I am trying to properly expose the main subject using a flash from an electronic flash device. The program then proceeds to a subroutine (12120) of program I that determines the aperture value (Av) and shutter speed (Tv), and returns. This is shown and explained in FIG. 23(b). The shutter speed control value (T
vc) is tuned Tv=7 (SS=1/125),
The aperture value (AV) is determined by subtracting 7 (shutter speed) from the exposure value (Ev), and this aperture value (AV) is 7 (F=1
1) Determine whether the value is greater than
), when the aperture value (Av) is 7 or less, it is determined whether the calculated aperture value (Ay) is smaller than the open aperture value (Avo), and if it is, the open aperture value (Avo) is changed to the control aperture value ( Avc), and if it is not smaller, return the calculated value (Av) as the control aperture value (Avc) (12220~
12230).

Returning to FIG. 23(a), in step (112105), if the electronic flash device (FL) is not ready to emit light, the terminal (FLOK) is set to the "L" level.
125) In order to properly expose the main subject, calculate the control exposure value (Ev) using the spot value (8vsp) of the photometry range, etc. as follows: (11)
2130), aperture value (Av), shutter speed (
subroutine (1213
Proceed to step 5) and return.

This is shown and explained in Fig. 23 (C). First, in step (12250) i" set the aperture value (Av) to 8v"5/8E.
v -25/8, and determine whether this aperture value (AV) is larger than the maximum aperture value (Avmax) of the lens (112255), and if it is larger, the control aperture value (Av
c) as the maximum aperture value (Avmax) (12260)
, proceed to step (cloud 2280). Step (122
55), the aperture value (Av) is the maximum aperture value (Avma
x) or less, the aperture [(Ay) is the open aperture value (8 VO
), and if it is smaller, the control aperture value (^νC) is set as the open aperture value (Avo), and if it is not smaller, the calculated aperture value (Av) is set as the control aperture value (Avc) in step (112280). ) Proceed to (112265-12
275).

In step (12280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev), and in the next step (12285) it is determined whether this is greater than the maximum shutter speed (Tv+gax), and if it is, the control shutter speed is The speed (Tvc) is limited to (Tv+wa×) (112290), and if it is not larger, the calculated shutter speed (Tv) is set as the control shutter speed (12295), and the process returns.

Returning to FIG. 23(a), in step (112100), when the difference in BVAM Bvsp is less than 2, it is determined that there is no backlight condition and the process proceeds to step (112145), where the average photometric value of the photometric range (LM, ) to (LM4) is calculated. (OH+
Exposure value (Ev) from Bvz +Bvz +BV4)/4
is determined, and it is detected whether the light opening device is ready to emit light (#2150).

When the light emission preparation is complete, step (#2155)
Proceed to Step 3 to determine whether or not the flash photography auto mode is in which the presence or absence of flash photography is automatically determined, and if it is in the auto mode, determine the aperture value (Av) and shutter speed (Tv) using the program ■ above. (112160), the shutter speed (Tv) is the camera shake warning speed (TV-6, 1/
60) (cloud 2165), and when the speed is less than the camera shake warning speed, the process proceeds to step (12170) to perform flash photography as a low speed, and in step (12155), the camera shake is not in auto mode. The process proceeds to step (112170) assuming that forced light emission is to be performed. Then, use program ■ to set the aperture value (A) for flash photography.
Determine the terminal (FLOk) and shutter speed (Tv).
) to "H" level to enable flash photography.

However, if the preparation for emitting light is not completed in step (12150), the process proceeds to step (12180) for shooting with constant light, determines the aperture value (Av) and shutter speed (TV) using program H, and determines the aperture value (Av) and shutter speed (TV) using the terminal (F).
LOk) to the "L" level (12185) and return. Also in step (112165), when the shutter speed (Tv) is 6 or more, the process similarly proceeds to step (12185) and returns.

Next, Fig. 24 shows a flowchart for determining the aperture value (Av) and shutter speed (Tv) in A mode. First, it is determined whether the electronic flash device is ready to emit light. , if the light emission preparation is complete, the control shutter speed (Tvc) is set to 7 (1/125), the terminal (FLOk) is set to rH, level, and the control aperture value (8νC) is set.
) as the set aperture value (Av) (1123
00-12310 and 112345). If the flash preparation is not completed, the exposure value (Ev) is calculated from the average metering value, and the shutter speed (TV) is calculated by subtracting the set aperture value from this exposure value (Il!ν) (112315.1
12320). Then, in the next step (12325), it is determined whether the shutter speed (TV) is larger than the controllable maximum shutter speed (Tvmax), and if larger, the maximum shutter speed (Tvwax) is changed to the control shunter speed ( Tvc), and if it is not large,
Calculate shutter speed (TV) to control shutter speed (
Tvc), each proceeds to step (112340) (112325 to 112335). Step (12
In step 340), the terminal (FLO) is set to the "L" level, and in the next step Q2345), the set aperture value (AV) is made to become the control aperture value (Avc).

Next, to explain the control in S mode as shown in FIG. 25, first, in step (12400), the exposure value (Ev
) is calculated from the average photometric value, etc., and it is determined in step (12405) whether or not the preparation for emitting light is completed. If the preparation for emitting light is completed, the terminal (FLOk) is set to the "rH" level (
112410).

Next, in step (12415) the shutter speed (Tv
) is 7 or less, and if it is 7 or less, the set shutter speed (Tv) is controlled.
) and 112420), and if it exceeds 7, the synchronization speed 7 is set as the control shutter speed (Tvc) and the process proceeds to step (112430).

In step (112430), the aperture value (Av) is obtained by subtracting the control shutter speed (Tvc) from the determined exposure value (Ev), and this aperture value (Av) is the maximum aperture value (^v
12435), and if it is smaller, the control aperture value (Avc) is changed to the open aperture value (Avo
) (I2440). On the other hand, the aperture value (
Av) is smaller than the open aperture value (Avo) (if not, determine whether it is larger than the maximum aperture value (Avmax) 112445), and if larger, the maximum aperture value (Av
max) as the control aperture value (AvC) (12450)
, if it is not large, change the calculated aperture value (Av) to the control aperture value (
Avc) (12455) and return.

In step (I12405), if the light emission preparation is not completed, the set shutter speed (Tv) is set as the control shutter speed (Tvc) (I12460), and the terminal (FLOk) is set as rl and J level (12465).
, proceeds to step (I2430) and executes the subsequent flow.

Next, when the mode is M mode (see FIG. 26), it is determined in step (12500) whether or not the preparation for emitting light is completed;
When the process is not completed, the terminal (LFOk) is set to "L" level, and when it is completed, the terminal (FLOk) is set to rH level, and the process proceeds to step (12515).
The preset aperture value (AV) is returned as the control aperture value (Avc), and the shutter speed (Tv) is returned as the control shutter speed (Tvc) in the next step (12520).

Returning to Figure 6, after completing the exposure calculation (1460), the camera's microcomputer (μC) performs the third data communication with the IC card (CD) (11465), and this control is shown in Figure 5 (C). To explain this with a flowchart, first, the terminal (CSCD) is set to "H" level, and the IC card (CD
) and performs serial communication (1360) and transfers the I to the IC card.
Notify that the C card is the output side (11360)
.

Now, wait for a while (1365), perform serial communication and input data from the IC card (CD) (1370)
, When this data communication is completed, the terminal (CSCD) is set to "L".
Level and return.

In this flow, the data sent from the IC card (CD) is different when the IC card is a mode setting card and when it is a program card.
First, if it is a mode setting card, there is mode setting data (CKba to CKb!□ in Table 7) and display control data (lJb?) that determines whether or not to display.On the other hand, if it is a program card In this case, ■ shutter speed for control (C-Tvc), ■ aperture value for control (C-Avc)
) There is data on: 1) Whether or not flash light is to be emitted, 2) Whether or not flash control light emission should be set to full light (Ful1 light), and 5) Whether or not control should be performed by the card.

When this card data communication (I [I) is completed in Fig. 6,
The microcomputer (μC) executes the card control flow of step (11468). Based on the data you entered, this flow will
Figure 27 shows how to determine whether or not to control the camera using the microcomputer (μC), and how the camera operates when the card function is selected. Step (1260)
2) and the card function is selected (CDPN
When P = 1), proceed to step (12605),
On the other hand, the card function is not selected (CDFNF-0
), the function bits (Fb*) and (Fb,.) are each set to 0 in step (It2677), and (
12680), the dimming level change amount (FΔEv) is reset and the process returns. When the card function is selected, it is next determined whether or not a program card is installed, and if a program card is installed (CKb+
""CKtli"Olw) is the step (112610
), check whether the camera is controlled by an IC card or not.
Judgment is made based on the data input from the card (CD). Then, if it is not a program card at step (12605) (Ckb, ~Ckb&≠01H), or if the camera is not controlled by an IC card at step (+12610) (Ckbz3=O), the process goes to step (12677) and then to step (12680). move on.

Camera control by IC card (Ckbz3=1
), the control aperture value (Avc), control shutter speed (Tvc) + presence/absence of Full 1 emission, presence/absence of flash emission, etc. are determined based on the data input from the IC card. (112615-11
2645). Next, use the input data to determine whether or not it is in the flash mode (12650), and if it is not in the flash mode, set the terminal (Fl, OK) to the "L" level.
2685), proceed to step (12680). When in the flash light emission mode, the terminal (FLOK) is set to the "I" level (12655), and it is detected whether or not it is in the Full1 light emission mode (112660). Then, when it is in the Ful1 light emission mode, the terminal (F
Set the terminal (Full) to the rH level and return, and when not in full light emission mode, set the terminal (Full) to the "L" level (u2670) and change the dimming level value! (C-FΔE
v) (112675) and return.

In FIG. 6, after completing the routine for determining and controlling the camera using the IC card (146B), the process moves to display control (1470), which is shown in FIG. 28 and will be explained.

First, the microcomputer (μC) determines in step (112700) whether or not the flag (CDFNF) indicating whether or not the card function is working is set, and if the card function is activated, the next step (# 2710)～(It2
720) has passed once (CDIP)
It is determined in step (112710) whether or not is set. Here, if the flag (CDIF) is not set, set it in step (#2715) and display the functions added by the card when the card function changes from not working to working. Step (
tool 2720) and proceed to step (#2725). When the card function is not working (CDFNF =
0), steps (12710) to (#2720)
Step (1270
5) and go to step (112725), or if this flag (CDIF) is set, do nothing and go from step (112710) to step (1127).
Proceed to 25).

In step (#2T25>, the above flag (DISPI
F) is set, and if it is set, it is determined in step (+12727) whether the card type is a program card, and if it is a program card, the shutter speed display section As the data of rPROJ, step (1272
Create in step 8). The display in this case is shown in Figure 34(b).
This is a 9-piece kimono shown in .

If it is not a program card, that is, if it is a mode setting card or if the card is not loaded, step (1127
29) to check the functions of the card set in the camera.
"Read from PROFI and create display data as shown in FIG. 34(a).The display data and display contents change depending on the set contents.

If the flag (DTSPIF) is not set at step (12725), the next step (+12730)
When determining whether or not to perform display control using a card, and performing display control using an IC card (CD) (CKb, =
In 1), display data is created according to the mode setting data input from the IC card (112735).

When there is no card display control signal from the IC card (Ckbw=O) in step (12730), step (#2
736) and write flag (WR
Determine whether or not TF) is set. When the write flag (WRTP) is set, that is, when the data setting mode using the card ends, the process proceeds to the mode setting subroutine (12737), further creates display data (n), and proceeds to step (112745).

The above mode setting subroutine is shown in FIG. 30 and explained. Here, it is determined whether the mode currently set in the camera is the newly set mode, and if it is not, the newly set mode is determined. I'm trying to move it to another mode. For example, if A mode is currently selected for exposure, but A mode is removed from the exposure mode selection by an IC card, it would be inappropriate to continue displaying and controlling A mode as before. is prevented.

Now, in the flow of Figure 30, the microcomputer (μC)
First, set the flag (C) IGF) that is reset when there is a mode that can be changed. ) and the data (CKb+z to CKb+a) to make a judgment 13203), and if they are different (that is, there has been a change), the data (pbo, Fbl) to (0,0) (113205), and proceed to step (13210).

Next, in step (#3210) it is determined whether there is an H/S mode, and if there is (CKb, = 1), the above flag (CHGF) is reset and the change data (CDb
, ~CDb2) to H/S change (0, 0, 0) and proceed to step (13230) (13220, 13225)
.

If there is no H/S mode (CKb@=O), data (
Fb &, Fb? ) without H/S of (0,0) (
13215), proceed to step (113230).

In step (13230), it is determined whether or not there is a 10/- mode, and if there is (CKb* = 1), the flag (
CHGF) is set or not in step (13).
245), and if it is set, reset the flag 13250), and step (1132)
In step 55), the change data (CDbO to CDb+) is changed to ÷/- change (001) and the process proceeds to step (13260).

If the flag (CIIGF) is not set in step (13245), step (13250),
(13255) respectively and directly step (
13260).

In step (13230), if there is no 10/- mode (CKb9-0), no correction is assumed and the functional data (
Fb,, Fbs) are (0,0), and the corrected exposure amount ΔE
Proceed to step (+13260) with v=0 (113
235, 13240).

In step (a3260), it is determined whether or not there is an S/C mode, and if there is (CKb+.=1), a flag (
Step (1) determines whether CI (GF) is set or not.
3270), and if it is set, it should be reset (13275), and the changed data (CDbO to C
Dbz) as (0, 1, 0) and the next step (+13
285).

If the flag (CHGF) is not set, skip steps (13275) and (13280) and proceed directly to step (+13285); step (1);
3260) and there is no S/C mode (CKb+.-
0), step (113265
) to set the function data (Fbs) to (0) and step (
e3285); in step (13285), S
/^ Determine whether the mode exists or not, and if so (CKb
+ + = 1), it is determined whether the flag (CHGF) is set in step (13295), and if it is set, the flag (CHGF) is reset (13300), and then the next step is performed. ($13305
), change data (CDb, ~CDbg) as S/A change.
) as (0,1°1) and return. If the flag (CHGF) is not set in the previous step (13295), there is no mode that can be changed (13310)
, change the change data (CDbo to CDbz) to (1,0,0
) is returned.

Also, if there is no S/A mode (CKb+ 1-0) in step (113285), return with the function data (Fbz) set to (0) to set the multi-point ranging mode (A mode) in step (1329G). .

In FIG. 28, the above-mentioned mode setting (12737) is performed, followed by data creation n (cloud 2742).

Data creation ■ is for creating display data for normal display not using a card (for example, Fig. 2 (U)).If the card function is not working, as shown in Fig. 29, It looks like the characters have been deleted. Each step (
1272B), (112779), (+127
After data is created in all cases of 35) and (12742), proceed to step ($12745),
In order to communicate data with the display control circuit, a terminal (CSDI
SP) to rH.

level, then perform serial communication (camera output side) in step (12750), and after communication is completed, terminal (C
3DISP) to rl, J level (12755).

Next time the card function is activated, it is determined in step (12760) whether or not a flag (DISPIF) indicating a certain period of time display is set, and if it is set, it waits for 0.5 seconds (12765). At this time, the data created in steps (12728) and (112729) above are displayed.

Next, in step (12770), the flag (DISPIP) is set.
If the flag (DISPIF) is not set in step (12760), skip steps (112765) and (112770) and proceed to step (#2775).
Proceed to 75). In step (#2775), data (CKby) is set to 0 in order to temporarily cancel display control by the IC card.

Next, the control shutter speed (TVC) is less than 6 (l/6
0) is determined in step (+12780), and if it is less than 6, it is determined whether a mode for issuing a buzzer warning is selected (112785). If selected (MSb, 〜MSb, □=00.2N, 4-engine,
6H, 8H+ AM.

C,, E□,) are terminals (
Output a pulse of a predetermined frequency from the OBZ) for a certain period of time (#2790), and proceed to step (lI2792).

When the control shutter speed (Tvc) is 6 or more or the mode does not provide a buzzer warning (MSb9 to MSb+
t = 1o, 3o, 5H, 71I, 9+, Bh, DH,
Step (11279) does not issue a buzzer warning for F+,).
Proceed to 2).

In step (+12792), the camera function indicated by the input mode setting data is
MSb.

, determines the flag (WRTF) indicating whether or not to write to , and if it is set, writes it to E''PROM (#2794), and then the next step (cloud 2796).
) to reset this flag (WRTF) and return. If the flag (WRTF) is not set in step (12792), return immediately.

The above-mentioned display system in Figure 6? After completing step B (+1470), the microcontroller (μC) moves to step (+1471).
At , it is determined whether or not a flag (SETF) indicating that the IC card is installed and the data setting mode is set is set, and if it is set, the process skips to step (1520) and all interrupts are enabled. Return. If the above flag is not set,
Skipping to step (1475), it is determined whether the release switch (S2) is turned on, and if it is not turned on (rPv-'HJ), the process returns.

When it is ON (IP?='LJ), it is determined whether it is one-shot AF (1480). Here, in the case of one-shot AF, a flag indicating focus (
AFEF) is set or not in step (#4
85), and if it is not set, the process returns via the step (11520).

When the flag (AFEF) is set, or when continuous AF is used instead of one-shot AF, interruption to this flow is prohibited in step (i490), and exposure control is performed in the next step (11495). (described later), the film is wound one frame in step (11500) (this will also be described later), and the release switch (S
2) is ON or not in step (s505), and
In the case of N (IP?=r L J ), it is determined in step (11510) whether or not it is continuous shooting mode, and when it is in continuous shooting mode (Pb3"1), step (1515)
Enable all interrupts and proceed to the routine (SO).If not in snapshot mode (Fb, -0), proceed to step (1150).
Returning to step 5), the process waits for the release switch (SR) to be turned off, and when it is turned off, all interrupts are enabled in step (1520) and the process returns.

Next, the exposure control subroutine of step (11495) is shown in FIG. 31 and will be described. First step (128
00), it is determined whether charging is completed based on the data input from the flash device (ST), and if charging is completed, the terminal (
CSST) is set to rl (J level) between (I2), indicating that it is in exposure mode.Then, the amount of light adjustment is set to film saturation (Sν), exposure compensation amount (ΔEν), and flash light emission amount compensation amount from the IC card. (FΔEv) is calculated and output after D/A conversion to the dimming circuit (STC) as analog data (#2810).

In the next step (112815), the control aperture value (Av
After performing aperture control based on c) and controlling mirror up (#2820), the control shutter speed (Tvc
) to control the shutter speed based on (#2825
), further sets the Ful1 light emission signal terminal to rl, J level (lI2830), and returns.

Here, the operation of the interface circuit when the flash is emitted is explained in the ninth section.
To explain based on Figure (C), during flash photography, the terminal (FLOK) is at the "H" level, and when the front curtain of the shutter completes travel, the X contact turns ON, and the AND circuit (
AND□) outputs a light emission start signal to the electronic flash device (ST), which inputs this signal and
Starts emitting light. When not in Ful1 flash mode,
The rH level is output to the AND circuit via the inverter (INg+), and when a pulse signal indicating the completion of dimming from the dimming circuit (STC) is input, the AND circuit (AN
Dzz) outputs this to the flash device via an OR circuit (OR21). In an electronic flash device (ST), this is input to stop flash emission. In the Ful1 flash mode, the "L" level is input to the AND circuit (ANDzt), the AND circuit (ANDtt) becomes inactive, and the passage of the dimming signal is prohibited, so the electronic flash device (ST) In this case, no signal indicating the stop of flash emission is output.

FIG. 32(a) and Φ) show step (15) in FIG.
00) is a flowchart showing the control for winding one frame of the film shown in FIG. To explain this, the third
In Figure 2 (a), the microcomputer (μC) □ outputs the motor hoisting signal to the morph control circuit (MO), and the timer (I
3) Reset and start (12850.1285
5).

This timer is used to detect when the film has been wound to the final frame and is stretched. The microcomputer (μC) turns the switch (So) indicating that one frame has been wound in step (I2860) to O.
If it is not ON, it is determined in step (12865) whether 2 seconds have passed in this state, and if 2 seconds have passed, the motor is controlled to stop (12870). , assuming that the film is taut, control the film tautness (112875),
Return. The above-mentioned tensioning subroutine is shown in FIG. 32G) and will be explained. It is determined in step (+12920) whether or not auto return (automatically rewinding the film after tensioning) is selected. When there is (MSb, ~MSb.

Wealth” OH~3H, 8N-BH, where □ is hexadecimal)
In this case, the motor control circuit (MD) sends the motor reversal signal.
and waits for the film detection switch (SFLH) to turn ON (12930, 12935). Then, when the switch (SFL, 4) turns ON, it is determined whether or not all the film should be rolled into the cartridge chamber. When involving (
E"P1?OM's MSbw~MSb4g = 2M, 3
g, 6n, IH, AH, BN.

EH, F) If 1), wait 1 second (112945)
After performing motor stop control (12955), the process returns.

Unless it is a case of involving (E”FROM (7) MSb
v~MSb+t=011.1 o, 4 engineering, 58.
81.911. CIl, DH), wait 0.2 seconds, stop the motor, and return (I2950).

When auto-return is not performed in the above step (12920) (MSbq-MSb+g = 4 N ~ 7 M,
cH,F,l) proceeds to step (12925) and waits for the rewind switch (Sl) to be turned on, and if it is turned on, proceeds to step (I2930).

Returning to FIG. 32(a), when the one-frame hoisting completion switch (Swe) is turned on in step (112860), the motor is stopped in step (12880), and then the next step (12885) is performed. Determine whether the film number counter is a forward counting type or not, and if it is a forward counting type (MSbw ~ MSb + z -Os ~7 N
), step (It2890) increments the count number (N,) of the counter indicating the number of film sheets that have been exposed by 1, and if it is a backward calculation method (MSb*~MS
b + z), the count number (N,) indicating the number of remaining films is decremented by 1, and the process proceeds to step (12900).

In step (12900), this number of films (N1
) is written to MSb+3 to MSb l- of E''PROM.

Next, when the camera back close detection switch (Slc) or the rewind switch (Saw) is operated, a pulse signal is input to the terminal (INT), and the microcomputer (μC) inputs the terminal (INTO) as shown in Figure 33. In the flow shown in the same figure, the microcontroller (μC) first prohibits interrupts to this flow (13000), and then executes step (11).
3005), it is detected whether the rewind switch (Srw) is turned on. If it is ON, execute the [Rewind] routine shown in FIG. 32(b) to perform the rewind operation, permit interrupts, and return (I1
3010) If the rewind switch (S) is not turned on, it is assumed that the back cover closing switch (Sac) is turned on and the process proceeds to step (13015), where it is determined whether or not there is a film. If there is no film, then
If the film detection switch (SFLM) is OFF, the screen (#3100) is removed without initial loading.
Proceed to. In contrast, if a film is present (i.e.
When the SF function is ON), set the terminal (C3DX) to the rHJ level, perform serial communication with the film sensitivity reading circuit (DX), input the film sensitivity data (Sν) and the number of film exposures (N), and then communicate. After completing the terminal (CS
DX) to “L” level (I3020-13030
). And set the number (N1) to -2.3035
), then set the terminal (C3DISP) to rHJ level and perform serial communication with the display control circuit (113045).
, outputs data that is not displayed except for data indicating the number of film sheets (N+), and when serial communication is completed, the terminal (CSD
ISP) is set to "L" level (13050), the display for this value of the number of films (N, ) is displayed using two 7 segments. output to the hoisting control circuit13
055), wait for 1 frame to be rolled up (1130)
60) ), when the 1-frame winding switch (Swe) is turned on, 1 is added to the number of film sheets (N, ), and it is determined whether or not it has become 1. If it is not ■, step (1
3040), if it is 1, step (1
Go to step 3075) to stop the motor, and then check step 13080 to see if the film counter is a forward counting type.
), and if it is a forward calculation formula, step (13085
), if (N,) is 1, and it is not a forward expression, step (13
The number of film shots (N) read with (090) is (N
I) and proceed to step (13095). Then, in step (113095), the above (N,) and film sensitivity are written to a predetermined address of B''PROM, and after the writing is completed, all interrupts are enabled (13100) and the process returns.

In the above, the microcomputer (μC) on the camera side of this embodiment
The operation of this camera has been explained using various flowcharts, and next, the control of the IC card installed in this camera will also be explained using flowcharts. Note that the mode setting card and program card will be explained separately.

The IC card (CD) has a built-in microcomputer (μCz) with a built-in E"FROM.

First, let's start with the mode setting card.
When D) is attached to the camera, power is supplied and as mentioned above, an interrupt is applied to the camera's microcomputer (μC), a clock (φ) is sent, and the microcomputer (μCZ) on the IC card side receives an interrupt. becomes drivable.

On the IC card side, the terminal (RE) is connected by attaching it to the camera.
A signal changing from "L" to rl (J level) is input to the microcomputer (μCZ), and the microcomputer (μCZ) executes the flow shown in FIG. Reset (IICTI,) and RAM (
7) Beep) (CCKbl~CCXbg) (0,0,
0) Reset the E”FROM(C) shown in Table 8.
MSbO~CMSb, RA data shown in Table 9
It moves to the bit corresponding to the data content among the bits of M (CCKbs to CCKt+z) (lCDl0) and waits for an interrupt (lCDl5).

The contents of this E2FROM data include the camera's E2FROM.
zPROM (7) data (MSbo to MSbz, MS
bs to MSb+*) can be written.

A signal from the camera indicating a data communication request (to CSBC)
is sent, the microcomputer (μC2) of the IC card executes an interrupt (INT), which is shown and explained in Figure 35 (b).
The data communication clock (SCK) sent from the camera (DS0) is used to control serial communication with the camera.
), manually input the data from the camera and determine the number of data communication (1, n, I[[) (l
lcD55). Data communication! If so, first check what type of IC card (mode setting or program)
Set the data that indicates to the camera (in this case the mode setting card), and output the data based on the clock (SCK) sent from the camera (llcD60
), wait for an interrupt (SCDS3). Data communication is
If so, the process proceeds from step (LCD70) to step (CD75), where data (key data in this case) sent from the camera is input in synchronization with the clock (SCK). Based on this input data, a data set routine (Russia CD75) is performed and an interrupt wait is performed (IcD63).

This data set routine is shown in FIG. 35(C) and will be explained when the card data setting switch (SCDS is
The step (ICDloo) determines whether or not the switch is ON or OFF.
ICDIIO, llCD105) to control each
The process proceeds to step (lCD115) through the flow of (5etrs 0N) (5cos OFF). The flow of this control is shown in FIGS. 35(d) and (e), and this control is shown in FIGS. 17 and 18 (Sc.

s ON), (Sc, s OFF) flow and comparison step (at500) and step ($1155
0), the step of determining the mode setting card is not included (this is not necessary on the card side), and the rest is the same, so the explanation will be omitted.

Note that the flag has a C at the beginning to distinguish it from the camera-side flag, and its function is the same as that of the camera-side flag without the C.

Returning to FIG. 35(C), in step (lCD125), it is determined whether or not the set flag (CSETF) is set, and if it is not set, (5cos
The flag ((
CCDSF) is set or not in step (l
CD125).

In this embodiment, the card data setting switch (Scos
) is OFF to enter the change mode, and if the flag (CSETF) is not set in step (lCD115), the settings cannot be changed yet.
It shows that something has changed.

When the flag (CCDSF) is set, the display control flag (DISPCF) should be set.
5) If the flag (CCDSF) is not set, reset it (lCD125) and return.

By setting and resetting this display control flag (DISPCF), it is determined whether or not the camera side display will be the display in the data setting mode [step (1127 in Fig. 28)].
30)) In step (IC[1115), when the flag (CSETF) is set, the switch (SSRI1 (SFIIN) + (Stxt), (Sa
tL), (SLIGl), (Sdn), (Sst ON), (SFLIN)
ON), (Sllp 0N) 1 (SAEL ON), (
Sup ON), (Sdn ON) and proceed to step (lCD125) (IC[1135 to IcDI9
0).

The flow according to the operation of these switches will be explained below.

First, the change mode is selected by the change data selection switch (Ssz), as shown in FIG. At this time, the above bit (C
Ckbo~CCkbz) is also changed and returned (IC
0300).

The selection of whether the mode can be changed by the change data enable/disable switch (SruH) is as shown in Figure 35 (-), the mode corresponding to the selected position of the change mode is set (changeable, bit = 1). If set, mode reset (change heat, bit = 0), if not set, set and return.In terms of signals, set (CCkbs~CCkb,) (=1),
It means to reset (=0). Needless to say, in step (IC0410), the S/A mode is set.

Next, the selection of selectable exposure modes by the exposure mode combination selection switch (S(IP)) advances by one each time this switch (Stxt) is operated, as shown in FIG. 35(b). , bit (CCkb, ~CCk
b. Change the state of ).

The selection of the AE flock mode by operating the AE floater switch (SAtL) is performed as shown in FIG. 35(i).
The bit (CCkb+4) is changed so that whether to flash or to perform AE flock during the camera power holding period (10 seconds hold) is alternately switched.

Up switch (SLIP), down switch (Sdn)
), the selection of the mode shown in Table 2 by each operation is performed using the bit (C) as shown in FIG.
Ckbl. When the up switch (Sup) is operated from the current position of ~CCkb+3), it counts up, and when the down switch (Sdn) is operated, it counts down.
+o~CCkb l 3).

In FIG. 35(C), the card data setting switch (Sees) is turned on by step (IICDloo), and the switch is sequentially stepped to step (ICDllo)→(lCD1
15) → (lCD120) → (lCD125), based on the card display control signal from the mode setting card (on the card side, this signal is output when DISPCP is 1), the camera displays Step (1)
12730) to (12735), the display showing the functions that can be set by the card and which the camera currently has (for example, the display shown in FIG. 38(b)) is displayed. 38(a)].

When the change data selection switch (SSt) is pressed - times,
The cursor (Δ) comes to the H/S position (however, H/S is not displayed because it is not currently set) (Fig. 38 (C)). In this state, change data enable/disable switch ( When SFLIN ) is pressed - times, the 11/S function is added, as shown in Figure 38(d).
is displayed.

Next, a similar operation is performed, namely the change data selection switch (SE
E), change data enable/disable switch (SF)
When the buttons are pressed once in sequence, the display as shown in FIG. 38(e) is displayed to indicate deletion of the 10/- function.

Next, the exposure mode combination selection switch (SEXP) -
When pressed again, PAMS will change to PAMS as shown in Figure 38(f).
The display changes to M. AE floc switch (SAEL)
) is pressed - times, PUSHSP will be displayed in the third position.
The display changes to "Ho1d" as shown in Figure 8 (6).

Here, when the up switch (Sup) is pressed - times,
2 changes to 1 as shown in FIG. 38(b).

Next, when the card data setting switch (Scos) is turned on and turned off, the card display control signal is no longer output from the card, and the camera changes from (#2730) to (
12736), and at this time, the flag (WRTF) indicating writing to E"l'ROM is set [that is, the above switch (Scos) is changed from ON to OFF.
(However, before turning it on, it is in the data setting mode using the card.) As a result, the display after this (assuming all the above mode change operations have been performed) is the display shown in Figure 38 (c). The display moves to FIG. 38(i).

Returning to FIG. 35 (g), if it is determined in step (llcD80) that the data communication is (1), serial communication (in this case, the card side outputs) is performed in step (CD85), IC card function data (CCk
b0~CCkb+4) and CDl5PCF) are given to the camera side. Then, it is determined in step (#CD90) whether or not the write flag (JRTF) to E"FROM is set. If it is not set, the process proceeds to step (ICD63) and waits for an interrupt. If so, the functional data (CCkbs~CCkb+
Write (ll
cD92), E”PROM write flag (CWR
TF), reset (IICD95), and step (
llcD63) and waits for an interrupt.

In the step (llcD80), data communication (
If it is not III), it is assumed that it is a sleeve signal and the state goes to LT.

Next, the case of a program card will be explained.

In this embodiment, the program card is a sports program that is effective when the user wants to watch sports scenes.

Now, when the IC card is inserted into the camera, a signal that changes from LJ level to rl (J level) is input to the RESET terminal of the microcomputer (μCZ) on the card side, and the microcomputer (μC2) of the IC card Execute the flow (reset) shown in (a), reset the flag and boat in step (Ql), and wait for an interrupt (Q2).When the C3BCK signal is input from the camera, an interrupt occurs and the 36th
Execute the flow (INT) shown in Figure (b). IC
The card's microcontroller (μCZ) performs data communication based on the clock (to the SC) sent from the camera (Q5
0), the data at this time is data used by the camera to inform the card side of the type of communication.
The microcomputer (μCZ) of the card manually reads this data and determines the content of the communication (Q51). If data communication is I, data indicating the type of card (in this case, it is a program card), data indicating that the AF mode is continuous, and the metering zone is multi-point are serially communicated to the camera side. (Q52) outputs,
Proceed to step (Q56) and wait for an interrupt.

This program card is designed for 2. sports scenes, so Continuous AF is always in focus to handle fast-moving subjects, and the metering zone is wide for the same reason. The points and distance measurement zones are preferably wide and multi-point because the focus is on the moving subject, but they are switchable in case the photographer wants to sharply focus only on the main subject.

Next, before explaining an example of a specific flowchart of exposure calculation, an overview of the control of this card will be explained.

◇Cards for outdoor sports and sports days◇ [Contents] You can photograph moving subjects in a relatively bright place with a high-speed shutter that prevents camera shake.

〔control〕

The control details for outdoor sports and athletic meet cards are shown in the program diagram of FIG. 37. This control is performed as follows.

(a) The aperture value of the lens ^ν is calculated using the following formula.

1! When v<21, Av= (3/4) ・Ev-23
/4 When Ev≧21, ^v-(1/2) ・Bv 1
/2, that is, when Ev<21, the aperture is slightly opened to increase the shutter speed (Tv). Therefore, Av-
(3/4) - Perform calculations for Ev-23.

When Ev≧21, it is considered that the shutter speed (Tv) is already sufficiently high, so ('Av), (Tv
) in order to change both Av − (1
/2) · Calculate Ev-1/2.

Next, the open aperture values ^vo and ^V are compared. If the calculated value is smaller than ^vo, the aperture value cannot be set to that value, so it is corrected to Avo.

Next, the shutter speed (Tv) is determined using the following formula.

When Av≧^vo, Tv = Ev −AvAv <
When Avo, Tv -Ev -Av.

(b) If the film is a negative film, the shutter speed (Tv) is corrected to increase the shutter speed (Tv).

Negative film has a wide latitude, so use this to underexpose by about IEv and maintain a high shutter speed.

Reversal film (positive) has a narrow latitude, so no correction is applied.

(C) Others The above control is performed when a lens with a focal length of 70mm or more is attached.The reason is that sports photography is considered to be relatively far from the subject, and a telephoto lens will not be able to fully capture the subject. Control is not performed because it seems impossible to capture a close-up image, and because if a telephoto lens is not used, the image magnification of the subject will be small and there is a low probability of camera shake caused by moving the lens to chase the subject.

With this control, the flash is forced off and the flash does not fire automatically.The reason is that this program card is intended for shooting in relatively bright places.
This is because the distance to the subject is considered to be relatively large, so even if the flash is activated, it does not seem to have much of an effect.

Further, in this control, if the flash switch is forcibly turned on, no control is performed. The reason for this is that this control does not cause the flash to emit light for the reason described above, so if the control is performed when the camera is forced on, it will go against the photographer's will to make the flash emit light.

Next, a flowchart of the exposure calculation of the program card is shown in FIG. 36(C) and will be explained. In the same figure,
The microcomputer of the program card first determines the presence or absence of a lens based on the data input in step (3). Here, if the lens is not attached to the camera body, lens data such as the maximum aperture value (Av0) will not come to the IC card. Therefore, exposure calculation cannot be performed, so
Proceed to step [phase] and leave exposure control to the camera body. If the lens is attached, proceed to step (3) and check the focal length of the lens from the input data. For lenses with a focal length of less than 70am, card control is not performed for the reason mentioned above, so in this case as well, the Ste/Knob [phase]
If the focal length is 70m or more, jump to the camera body and leave exposure control to the camera body, check the status of the forced flash switch from the data input in step (2).

If the forced flash switch is ON, the card will not control the flash for the reason mentioned above, so step @
Jump to.

On the other hand, if the switch is OFF, proceed to the next step ■
The exposure value (Ev) is calculated by the sum of the spot brightness (Bvs) and the film sensitivity (SV) of the manually inputted data. Then, the content of the control is changed depending on the value of the exposure value (Ev). For the reasons mentioned above, when Ev<21, AV=
Find (AV) in step [phase] from the formula (3/4)·Ev −23/4. When Ev≧21, Av= (1
/2) ・Step ■ from Ev-1/2 (AV)
seek.

(AV) calculated in step ■ and the minimum aperture value of the lens (
Avmax) is compared in the next step (2). When Av≧Avmax, the lens cannot be stopped down any further, so in step (2), the body control aperture value Avc is set to AVIlax.

On the other hand, when Av<^vmax, Avc is
=Av. In this way, the aperture value A for body control
After determining vc, the shutter speed (T
V) is calculated based on Tv = Ev - Avc.

In the next step ■, this shutter speed (TV)
and the camera's maximum shutter speed (Tvmax). Here, when Tv≧TvnaxO, proceed to step @ and set the shutter speed for body control (Tvc).
Let be (Tvmax). When Tv<TvmaxO, Tvc - TV is set in step @.

If Ev<21 in the above step ■, step [phase]
After calculating (Av) in 2 shown in 2, proceed to step 2.

In step (2), (Av) calculated in step (2) is compared with the open aperture Avo. Here, when Av>Avo, the process goes to step (2) to compare AV) and (Avmax). When Av≦8ν, the aperture value of the lens cannot be opened any further, so the process proceeds to step [phase] and the aperture value for body control (Avc) is set to (Avo).

Further, in step (2), the shutter speed (TV) is calculated from the formula Tv=EcAvc.

For the reason mentioned above, if the film is a negative film, the shutter speed (Tv) must be corrected, so the type of film is determined in step [stock].

As a result, in the case of a reversal (positive) film, the process proceeds to step @ in order to prevent the shutter speed (Tv) from becoming extremely slow.

On the other hand, in the case of a negative film, the process proceeds to step (2), where it is determined whether the shank speed (Tv) is smaller than 9 or not. When Tv≧9, the body control shutter speed (Tvc) is set to (TV) in step [phase].

When Tv<9, the process proceeds to step [phase] and further determines whether the shutter speed (Tv) is 8 or more.

Here, when Tv≧8, Tvc=9 and step @), and when TV<3, step ■, Tv=Tν+1
Perform the following correction and proceed to the next step 0 (.In step @, in order to prevent the shutter speed (Tv) from becoming extremely slow, the maximum value of (Tv) is limited to Tv-5 (30 seconds). Make a comparison.

Here, when Tv<5, Tvc=-5 (step @), and when Tv≧5, Tvc=Tv (step [phase]).

For the reason mentioned above, flash control is not performed, so in step [phase], a bit is set to turn off the flash. Thereafter, the process advances to step @, the camera control uses the value calculated by the program card, and returns.

When the flow of these exposure calculations is completed, the process returns to the flow of FIG. 36(b) and waits for an interrupt.

At this point, there is an interrupt from the camera side, and at this time, if there is data communication (■), the calculated aperture value (CAvc), shutter speed (CTvc) data, and whether or not to control the camera using the card, and whether or not to force Full 1 emission (Fb .

=0)1 Data regarding prohibition of forced light emission (Fb+o=O) and resetting of the iWJ light correction amount (v to CF8) are created, serial communication is performed, and the data is output to the camera side. Note that the microcomputer (μCZ) of the card stops during communications other than those mentioned above.

Here, the switches, their functions, various data, etc. that appear in the explanation of this embodiment are shown in Tables 1 to 10 below.

Table Table 2 (Continued) Table Function Data (Fb, ) AM Table Mode Setting Data (MSbn) E2FROM Table Card Type Data (CKbn) RA, M Table Change Data (CDb, ) (RAM) Front card communication output data (CSb, ) Table setting data (CMSbn) E” PROMIC card,
Function Data Table (Continued) In the table above, the entire control system for camera functions using an IC card has been described. This is shown in Figure 30. still,
Changes in mode selection are shown in FIGS. 35(C) and 35(B).

As described above, according to the present invention, when there is a change in the selection of modes that can be used, the setting mode is changed to a predetermined mode accordingly. By making sure that the selection mode always exists in the selected mode after the change, it is possible to avoid the unreasonable situation where a mode that does not exist after the change remains the set mode.

[Brief explanation of the drawing]

The figures are all related to embodiments of the present invention, and Fig. 1 is a circuit block diagram of the entire camera, Fig. 2 is a diagram showing the display form on the display section, and Fig. 3 is a diagram of the camera when the battery is installed. 3 is a flowchart showing a reset routine. FIG. 4 is a flowchart showing the initial cent routine in FIG. FIG. 5 is a flowchart of data communication performed between the camera and the IC card attached thereto. FIG. 6 is a flowchart showing a routine for photometry, AF, display, exposure control, etc., and FIG. 7 is a flowchart showing a routine for inputting lens data therein, and FIG. 8 is a flowchart for inputting flash data. FIG. 9(a) is a circuit diagram of the electronic flash device, and FIG. 9(b) is a circuit diagram of its interface. FIG. 10(a) is a flowchart of the AF sequence,
FIG. 10(b) is a flowchart for determining the day focus amount, and FIG. 11 is a diagram showing the distance measurement range and photometry range within the shadow screen. FIG. 12 is a flowchart showing the setting routine of the keys provided on the camera, and FIGS. 13, 14(a), 14(b), and 15
Figure, Figure 16. FIGS. 17 and 18 are flowcharts showing specific setting routines for the various keys. Figure 19 is a flowchart showing the routine for creating photometric data;
Figure 0 is a flowchart of the A20 check. Figure 21 (
a), FIG. 21, etc.) are flowcharts for setting the aperture and shutter speed. Fig. 22 is a flowchart of exposure calculation, and Fig. 23(a), Fig. 23°C), Fig. 23(C), Fig. 24, Fig. 25, and Fig. 26 are flowcharts of each mode therein. It is. FIG. 27 is a flowchart of control by an IC card (particularly a program card). FIG. 28 is a flowchart showing the display routine, and FIG. 29 is a diagram showing a display example in one step of the flowchart. Fig. 30 is a flowchart for mode setting, Fig. 31 is a flowchart for exposure control, Figs. 32(a) and 32(b) are a flowchart for winding one frame of film, and Fig. 33 is an interrupt flowchart for closing the back cover. It is a flowchart showing a routine. FIG. 34 is a diagram showing an example of a display when a card is inserted. FIG. 35 is a flowchart showing various routines for the IC card, FIG. 36 is a flowchart especially for the program card, and FIG. 37 is a program diagram for the program card. FIG. 38 is a diagram showing a display example regarding the flowchart in FIG. 35. (μC) - Microcomputer 4 of the camera body (uCz) - Microcomputer of the IC card (CD) - IC card (SEXP) - Exposure mode selection combination switch. (Scos) - Card data setting switch.

Claims (3)

[Claims] (1) a selection means for selecting a usable mode related to the control function of the camera; a setting means for setting the mode to be used among the selected modes; and a first means for storing the mode selected by the selection means. a storage means, a second storage means for storing the mode before being selected by the selection means, a comparison means for comparing the contents of the first storage means and the contents of the second storage means; A camera system comprising: control means for setting a setting mode to a specific mode based on the comparison result of the comparison means. (2) The camera system according to claim 1, wherein the specific mode is always selected by the selection means from among a plurality of modes. (3) The plurality of modes are exposure-related P mode (program mode), A mode (aperture priority mode), S mode (shutter speed priority mode), and M mode (manual mode), and the specific mode is P mode. The camera system according to claim 2, characterized in that: