JP2751437B2 - Camera system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera system, and more particularly to a power supply holding (function continuation) control thereof.

2. Description of the Related Art Normally, photometry for exposure control and display related thereto are started by operating a switch (hereinafter, referred to as an S1 switch) provided on a shutter release button, but the S1 switch is not operated. However, the photometry and the display are continuously performed for a predetermined time (also referred to as “power holding”), and after the predetermined time, the operation is automatically stopped.

On the other hand, by operating the S1 switch, an automatic focusing (AF) operation is started, and by further operating a switch (hereinafter referred to as an SQ switch) provided on the lens in this state, the driving of the lens is stopped. (That is, focus lock) (actual opening 58-62)
No. 310).

Problems to be Solved by the Invention As described above, the power holding is extended by operating some function switch of the camera body. Conventionally, the lens switch (SQ switch) has the purpose as described above. Since the driving of the lens was stopped, there was no relation to the extension of the power supply holding.

However, if the photographer operates the switch of the camera regardless of the switch, it is considered that the photographer intends to perform some kind of photographing operation. It is not preferable to cut it.

The present invention solves such a problem and provides a camera system that can maintain the power supply for a long time even when a switch related to lens driving is operated.

Means for Solving the Problems In order to achieve the above object, the camera system of the present invention comprises, as shown in FIG. 45, a photometric unit for measuring the luminance of the subject,
Display means for displaying control information of the camera system; function execution operation means for activating the functions of the camera system including photometry, focus control, and display; Time is a function continuation unit that operates a function excluding focus control among the functions, a lens driving stop operation unit that stops lens driving by the focus control unit while the function execution operation unit is operated, If the lens driving stop operation means is operated while the function continuation means is operating, the function excluding the focus control is operated during the operation, and further,
And control means for activating the function continuation means when the operation is stopped.

It is convenient if this lens driving stop operation means is provided on the lens.

While the function continuation unit M5 is operating, that is, when the lens driving stop operation unit M6 is operated while the display and photometry only functions are operating (while the power is held), the photographer It is considered that there is some photographing intention of the power supply, so that the power holding is extended for a predetermined time while the power supply is being operated and after it is not operated.

Embodiment FIG. 1 is a circuit block diagram of a camera according to this embodiment.
In the figure, (μC) is a microcomputer (hereinafter referred to as “microcomputer”) for controlling the entire camera and performing various calculations, and has an E ² PROM so that writing and reading can be freely performed inside. (AFct) is a focus detection circuit for performing focus detection, which is composed of a CCD, an integration control circuit, and an A / D conversion circuit. Convert and output to microcomputer (μC). (LD1) is an auxiliary light emitting element that emits light toward the subject when the luminance is low and the focus cannot be detected, thereby enabling focus detection.

(LM) is a photometry circuit which performs photometry for four areas described later, A / D converts the photometry value, and a microcomputer (μ).
C) as luminance information. (DISPC) is a display control circuit that inputs display data and a display control signal from a microcomputer (μC) and performs predetermined display on the display unit (DISP _I ) on the top of the camera body and the display unit (DISP _II ) in the viewfinder. is there.

In this embodiment, there are two types of IC cards, a mode setting card for setting the mode of the camera and a program card for determining the exposure. Only one of them can be mounted on the camera, and the camera is mounted on the mounted IC card. Based on this, a specific mode, an exposure program, and a function are controlled. This will be described later in detail. (ST) is an electronic flash device, (IF) is an interface provided between the microcomputer (μC) of the camera and the electronic flash device (ST),
(STC) is a dimming circuit that receives the subject reflected light at the time of flash emission that has passed through a not-shown photographing lens, and stops flash emission when an appropriate exposure amount is reached. (LE) 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 a taking lens based on focus detection information, (Tvct) is a shutter control circuit that controls a shutter based on a control signal from a microcomputer (μC), (Avc
t) is an aperture control circuit that controls the aperture based on a control signal from the microcomputer (μC), and (MD) is a motor control circuit that controls film winding and rewinding based on the control signal from the microcomputer (μC). It is. (BZ) is a buzzer that warns when the shutter speed reaches the speed at which camera shake occurs. (E) is a battery serving as a power supply, (D ₁ ) is a diode for preventing backflow, and (C _BU ) is a backup capacitor of a microcomputer (μC) having a large capacity.
(R _R ) and (C _R ) are a reset resistor and a capacitor for resetting the microcomputer (μC) when the battery is installed. (Tr1) is a power supply transistor that supplies power to a part of the circuit described above.

Next, the switches will be described. (SRE) is a battery mounting switch that is turned off when a battery is mounted. When a battery is mounted and the switch (SRE) is turned off, the microcomputer (μC) is turned off. A signal that changes from “L” level to “H” level is applied to the terminal (RE), and a microcomputer (μ
C) executes a reset routine described later. (SEM) is a normally open exposure mode change switch. The operation of this switch (SEM) and the up switch (Su
The exposure mode is changed by operating p) and the down switch (Sdn). (SFUN) is a normally open function change switch, and a function change (for example, switching between continuous shooting and single shooting) is performed by operating this switch and operating an up switch (Sup) and a down switch (Sdn). (SCD) switches the card function between invalid and valid when a normal card is installed. If the data setting mode is selected when the mode setting card is installed, the changed data item is selected. This is a normally open card function enable / disable switch.
The set value in the item can be set by operating the up switch (Sup) and the down switch (Sdn). (Details will be described later).

(SCDS) is a normally open card data setting switch which is operated when a mode setting card or a function card (program card) is mounted to change a mode setting or to set data necessary for a function. .

(S ₀ ) is a photometry switch that is operated to perform camera operations (for example, photometry and display of various data) except an autofocus (hereinafter, referred to as “AF”) operation, and touches a release button (not shown). It consists of a touch switch that is turned ON only by itself. The above switch (SEM) (SFU
N) (SCD) (SCDS) 1 single switch is ON among the (S ₀₎
Then, the microcomputer (μC) executes the interrupt flow of (INT1) in FIG. 3 described later. (S1) is an AF switch for starting the AF operation, which is turned ON when the first stroke of the release button is pressed. (S2) is a release switch operated when performing a shooting operation, and is turned on when a second stroke (deeper than the first stroke) of the release button is pressed. (SWD) is a one-frame switch that is turned on when one frame of the film is wound. (SAEL) is a switch for performing AE lock (exposure lock), and is constituted by a normally open push switch. (SAF / M) is a focus adjustment mode switch for switching between AF and manual focus adjustment.

(SSE) is a normally open change data selection switch for selecting data to be changed. (SSELF) is a self-mode switch operated during self-photographing.
(Sav) indicates that the exposure mode is M mode (manual mode)
In this case, the aperture change switch changes the aperture value by operating this switch and operating the up switch or the down switch. When there is no operation in the M mode, the shutter speed is changed by operating the up switch or the down switch. (SFLM) is a film detection switch which detects whether or not a film is loaded, is disposed on a film rail surface near the spool chamber, and is turned off when a film is present. (SRC) is a back cover closing detection switch which is turned on when the back cover is closed and turned off when opened, and the microcomputer (μC) executes an interrupt routine described later by turning on this switch.
(SRW) is a switch for starting film rewinding, which is turned ON when operated, executes an interrupt routine described later, and is turned OFF when the back cover is opened. (SCR) is an IC card mounting switch that is turned off when an IC card (CD) is mounted, and resets the microcomputer (μC2) of the IC card (CD) when turned off. (X) is a so-called X contact, which is turned on when one shutter travel is completed, and turned off when the release member (not shown) is charged.

(Sup) is an up switch for switching or adding data to be changed, and (Sdn) is a down switch for also performing subtraction. When the aperture value is changed in the M mode, the aperture change switch (SAv) is turned ON and (Sup), (S
The operation of increasing or decreasing the aperture value by the operation of (dn), and the function of increasing or decreasing the shutter speed by the operation of (Sup) or (Sdn) of the aperture change switch, respectively. However,
Aperture change switch (S
Av) OFF, aperture change, aperture change switch (SAv) ON
Can change the shutter speed. The operation of the up switch (Sup) and the down switch (Sdn) is detected by the fact that the terminals (IP20) and (IP21) have each become "L" level. In FIG. 1, a line (WI) common to the above switches is connected to a ground potential point (GND).

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

Next, before describing the operation of the camera of this embodiment, two types of IC cards used here, that is, a mode setting card and a program card will be described.

(I) Mode setting card; This IC card is used to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that are deemed unnecessary) or to select alternative functions. By doing so, it is intended to provide a camera according to the intention of the photographer and the photographing technique. In addition, since unnecessary functions can be omitted, a camera which is simplified and has good operability when changing modes is provided. Next, description of the card and display contents performed on the card will be described.

First, the selection of the function of this IC card is (i) 4
Selection of two functions, (ii) selection of exposure mode, (iii) AE
Selection of relational functions (iv) Alternative functions, (v) Relations by operating lens-side switches, and the like. The four functions (i) are: (a-1) a highlight reference / shadow reference exposure function (a-2) an exposure correction function (a-3) a film winding mode switching function (continuous shooting / single shooting) (A-4) A spot AF / multipoint AF switching function, from which a function necessary for a photographer can be selected. As the display on the display unit (DISP _I ) on the camera body relating to the selection, the display shown in FIG. 2 (b) is prepared from all the display contents shown in FIG. 2 (a). In FIG. 2B, the functions correspond to the functions (a-1) to (a-4) described above in order from the left side. If the photographer does not need only the highlight reference / shadow reference exposure function (a-1), the image is displayed as shown in FIG. 2 (c).

For each of the selected functions, the display regarding the use or switching of the function is indicated by a highlight reference... FIG. 2 (d) A shadow reference... FIG. 2 (e) Exposure compensation + side... FIG. ) Exposure compensation-----Fig. 2 (g) Continuous shooting mode---Fig. 2 (h) Single-shot mode--Fig. 2 (i) Spot AF-Fig. 2 (j) Multi-point AF- FIG. 2 (k) is obtained. As an exception, in the case of multi-point / spot selection by a program, and in the case of spot selection by a switch (SQ) to be described later, the mode set by the above two is displayed irrespective of selection not being possible only when selected. Is done. For continuous shooting / single shooting, spot AF / multi-point AF,
Either function (for example, continuous shooting) is always selected even if it cannot be switched. However, since switching is impossible, no display is made.

The display of FIG. 2A shows that the exposure compensation function and the film winding mode switching function are selected, and that the exposure compensation + side and the single shooting mode are controlled.

At the time of setting, the numbers "0" to "15" shown in Table 2 (a)
2 (b) (all functions available, corresponding to number “0”), FIG. 2 (c) [H / S function Is displayed, corresponding to the number "8"], and the display is advanced by one by operating the up switch and the down switch.

Next, the exposure modes related to the selection of the exposure mode in the above (ii) 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), and the P mode is always set as a basis, and a combination of the remaining three modes (A, M, S mode) can be selected. Accordingly, there are eight combinations as shown in the table on the next page, and the display is one of the four mode displays shown in FIG. 2 (m) (where PROGRAM is represented by P).
When the mode is set, the selected combination is displayed, for example, as shown in FIG. 2 (n). At the time of photographing, the selected exposure mode display [FIG. 2 (o) (A mode selection)] is displayed. Done. In the case of a P code, PROGRAM is displayed (FIG. 2 (p)).

Next, the selection of the AE-related functions in the above (iii) includes the following.

(C-1) AE lock button (1) Hold the camera power in the AE lock state while pressing the AE lock button (2) Press the AE lock button once and press the AE lock button again in the AE lock state, or Release the AE lock state by turning off the power. (C-2) Set the shutter speed to 1/2 Ev.

This is so that the set shutter speed, which is usually changed only by 1 Ev, can be set in 1/2 Ev.

(C-3) In the M mode of the exposure mode, the aperture change switch (SAv) is kept OFF and the aperture value is changed only by operating the up switch and the down switch, and the aperture change switch (SAv)
Shutter speed change (hereinafter referred to as "M2 mode") in combination with the operation of (i.e., ON), or the aperture change switch (S
Av) remains OFF, and switches the mode (hereinafter referred to as "M1 mode") in which the aperture value is changed in combination with the shutter speed change and the operation of the aperture change switch (SAv) (that is, ON).

When these functions are set, they are displayed as shown in FIG. 2 (v), "F-5" indicates this mode change, and the number "2" indicates the function shown in Table 2 (e). Indicates that each is selected.

Next, (iv) two alternatives to the function are (d-1) film counter ordering or subtraction (d-2) with or without auto return at the end of the film (d-3) rewinding At the end, a part of the film reader is wrapped in the patrone or left outside the patrone. Numbers are given to combinations as shown. At the time of setting, it is displayed as shown in FIG. 2 (q), the lower three digits of the shutter speed indicate the changed item, and the film counter indicates the lower order item.

(V) The relationship by operating the lens side switch
When a switch (described later) provided on the lens side is operated, what kind of AF (autofocus) mode is selected. First, the switch is not operated ( However, (E-1) One shot in multi-point / spot area
AF (Follow-up determination after focusing) (Continuous AF may be selected in program mode) When the switch is operated (E-2) Focus lock (E-3) Spot AF (E- 4) There is continuous AF, and it is displayed as shown in Fig. 2 (r) at the time of setting. In the figure, "F-2" is the lens side switch (SQ) (3rd
6), and “3” indicates the mode (continuous AF). The selection numbers and functions are shown in Table 2 (c).

The mode setting card also has the following functions (vi) and (vii).

(Vi) Second setting of self-timer The standby time in the morph mode can be changed, for example, 2 seconds, 5 seconds, and 10 seconds. The display in this case is shown in FIG. 2 (s), where "F-3" indicates the self-time setting and "1" indicates the value at the set time (5 seconds). The selection numbers and functions are shown in Table 2 (d).

(Vii) AE level change This is to constantly adjust the exposure level of the camera by a fixed amount.
5,0, -0.25, -0.5 (Ev), and the selection numbers are sequentially assigned from 0 to 4 (not shown) from the left. The display is
FIG. 2 (t) shows that "F-4" has been changed to the AE level change mode and "3" has been changed to "+ 0.25Ev". In the above (i) to (vii), when the card key is turned on once at the time of mode setting, (i) to (vii)
Are sequentially selected, and a function (set value) in the mode is selected by pressing an up switch or a down switch. The modes (i) to (vii) and the functions can be set cyclically.

(II) Program card; The program card includes an exposure program control and a variety of camera controls designed to shoot a moving subject in a relatively bright place with a high-speed shutter that does not shake. (Details are described later).

Next, the operation of the camera is shown in FIG.
A description will be given based on the flowchart of C), and a detailed description of each unit will be given as necessary.

When the battery (E) is mounted, the battery mounting switch (SR
E) turns OFF and the terminal (RE) goes from “L” level to “H”.
A signal that changes to the 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 [RESET] routine shown in FIG. In the routine, the microcomputer (μC) first performs an initial setting due to the fact that the battery is mounted (#
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 “L” level. Further, all the flags [Table 8 (described later)] and the RAM (register) in the RAM are reset, and a flag (BATF) indicating that the battery is installed is set (# 100 to # 110). This allows you to set the exposure mode to P mode and spot / multipoint AF to multiple points
AF mode, single shot (S) / continuous shot (C) is called single shot (S),
A mode in which exposure correction, highlight (H) / shadow (S) is not performed, and a mode in which one-shot AF, full light emission is not performed, forced non-light emission, and multipoint metering are set.
Table 3 shows the contents of the function data.

Next, the mode setting card of the above two types of IC cards is inserted once, and it is detected whether the mode setting has already been performed by checking the contents of the E ² PROM (the contents of MSb4 described later). If the setting has not been completed, interrupts other than the IC card insertion interrupt (CDINT) are prohibited, and the process returns (# 135, # 140). If the mode has been set, the mode that has been set is checked from the contents of the E ² PROM (the contents of Msb0 to MSb3 described later), and a portion for displaying the change data is determined. Highlight / Shadow mode (H /
S mode), Exposure compensation mode (+/- mode), Single shot /
Detects whether the mode is set in the order of continuous shooting switching mode (S / C mode) and spot / multi-point AF switching mode (S / A mode). If so, the first set mode is set. Set the change data of (# 145 to # 1)
82). Tables 4 and 5 show the RAM change data and the E ² PROM setting mode data. Note that the above step (# 145
-# 182) is equivalent to determining the position of a cursor, which will be described later, in terms of display.

Next, control for sending data to the display control circuit (DISPC) is performed to display these setting modes. First, the terminal (CSDISP) is set to the “H” level, data communication is notified to the display control circuit (DISPC), data (see Table 9) is created, serial communication is performed, and the terminal ( CSDISP) to the “L” level, and outputs the end of serial communication to the display control circuit (DISPC) (# 185 to # 20)
0).

Here, the operation in the case of serial communication will be briefly described. First, a clock is output from a serial clock terminal (SCK) according to a serial communication instruction. The output side outputs one bit of data in synchronization with the rising edge of the clock, and the input side inputs one bit of data in synchronization with the falling edge. By performing this as necessary, necessary data can be obtained. FIG. 2 (u) shows a display example of a normal shooting state.

As the display contents, in the example of FIG. 2 (u), the shutter speed [1000], the aperture value [5.6], the AE mode [PROGRA
M], the number of films (including film presence) [17], focus mode (ONE SHOT AF), and function mode (figure on the bottom line). These display data are shown in Table 9 (the explanation will be made in accordance with the display control based on the sequence). The display data here is the AE mode selected by the IC card (CD) of bits b2 to b4 of the address (03H), and the I data of bits b0 to 7b of the address (04H).
With / without mode setting by C card (CD), address (0
8H) bits b4 to b7 and (09H) bits b0 to b7 are read from the E ² PROM and set to each address by reading the selection number set in (iv) to (vii) change mode by IC card (CD). I do. In addition, the data of the data change display (address 05)
Hb0 to b2), when battery is installed (b4 of OAH = 1) (b1 to b of OAH)
(3, b5, b6 = 0) is set to each address. The display control circuit (DISPC) receives the battery installation signal,
The display unit (DISP ₁ ) is driven at intervals of 0.5 seconds according to the data of the function set in the E ² PROM so as to perform the display of FIGS. 34 (a) to 34 (e).

Data other than the above is also sent to the display control circuit, but the display control circuit receives the battery installation signal and
The operation is performed so as to perform the display shown in FIGS. The microcomputer (μC) waits 2.5 seconds in step (# 205) and causes this display to be performed for 2.5 seconds. Then, the number of films N1 (MSb13 to MSb18) stored in the E ² PROM, film sensitivity
The contents of Sv (MSb20 to MSb25) are read out and transferred to the number N1 of films in the RAM and the film sensitivity Sv (# 207). Thereafter, card data communication I for knowing whether or not the IC card is mounted and the type of the IC card is performed. (# 210).

The subroutine of the card data communication I is shown in FIG. In the figure, first, the terminal (CSCD) is set to “H” level to notify the IC card (CD) of communication with the IC card (CD), and the data output mode is set to the data indicating the data communication I (the sixth). (See table) is sent to the IC card by serial transfer (# 300 and # 305).

The predetermined time required for inputting this on the IC card (CD) side to create and output necessary data and microcomputer (μC)
Waits (# 310). And this time, the data is an IC card (C
D), it operates in the input mode, performs serial transfer with the IC card (CD) (# 315), and when this is completed, sets the terminal (CSCD) to the "L" level (# 32)
0).

In this operation, the IC card (CD) outputs 2-byte data. This data includes the presence / absence of the card, a byte signal indicating the type of the card, and 1 indicating the function of the camera.
It is input to the address (20H, 21H) in the camera as a byte signal.

Next, the type of the IC card is determined in (# 321).
In the case of a mode setting card, the data only indicates the type of IC card, and the second byte is all "0", so it returns immediately, whereas in the case of a program card, the data is only the type of IC card Instead of AF mode continuous / one-shot (details are described later), AF zone spots / multiple points, metering zone spots / multiple points,
Since function data indicating one of continuous shooting / single shooting or that there is no particular designation (photographer setting) is included, it is next determined whether or not the card function is selected ( # 322). Card function is selected (CDFNF =
In the case of 1), the bits Fb2, Fb3, Fb8, and Fb12 of the function data are rewritten to set data (# 323), and the process returns. On the other hand, when the card function is not selected, the process returns without performing data rewriting.

Returning to FIG. 4, the microcomputer (μC) determines from the input data (see FIG. 7) whether or not the IC card is mounted, and when the IC card is not mounted (b0 = 0 at 20H), the IC (μC) is used.
Return without displaying the card type. When the IC card is mounted (20H b0 = 1), the type of the IC card is determined, and when the mode setting card (20H b1 = 1), the display data for this IC card (08H b0 = 1) is set. 0) is created (# 230), and in the case of a program card (b1 = 0 of 20H), display data for a program (b0 = 1 of 08H) is created (# 245).

In addition, the card function is ON (b0 of 04H = 1), and the control signal "OAH
= 0, 0, 0, 1, 0, 0, 0, 0 ”(in the order of b0 to b7), and outputs all display data to the display control circuit (DISPC).

The display control circuit (DISPC) inputs a signal indicating when the IC card is inserted, and performs data display according to the type of the card for a fixed time (0.5 seconds). This display example is
These are shown in FIGS. FIG. 35 (a) shows the case where a program card is inserted, and FIG. 35 (b) shows the case where a mode setting card is inserted. At this time, the card function is forcibly turned on, so that this data is also created and sent.

The microcomputer (μC) waits for this display time (0.5 seconds) in step (# 270), sets a flag indicating that the card function is valid (# 273), and permits all interrupts in the next step (# 275). Then, the process proceeds to the step (# 10) in FIG.

In FIG. 3, when the initial setting (# 5) is completed, an exposure mode change switch (SEM), a function change switch (SFUN), a card function enable / disable switch (SCD), a card data setting switch (SCDS), and a photometry switch ( S ₀ ) is turned on in step (#)
Judgment is made based on the level of the terminal (IP5) in 10), and if none of the above switches is turned ON (IP5 =
"H"), it is determined in step (# 15) whether or not the battery mounting flag (BATF) is set. If the battery mounting flag (BATF) is set, no action is taken after the battery is mounted, Jump to (# 45) and step (#
45) The display is turned off and the IC card (C
D) Stop control is performed. First, OAH =
0,0,1,0,0,0,0,0, and uses this data as the display control circuit (DIS
PC) (# 45 to # 60). Therefore, the display is completely turned off.

The microcomputer (μC) sends the sleep sign (instruction to stop the IC card) signal to the IC card (CD) after sending the turn-off data to the display control circuit (DISPC) as described above (# 65).
~ # 75). This sleep sign is formed by setting both the bits CSb0 and CSb1 to 1 as shown in Table 6.

Thereafter, by setting the terminal (PW) to “L”, the transistor (Tr1) is turned off, and a flag (AE
LF) and the flag (BATF) indicating when the battery is installed are reset, and all interrupts are permitted and stopped (# 77 to # 9).
Five). The stop (HALT) also stops the oscillation of the internal clock.

In the above step (# 10), five switches (S
EM), resets the (SFUN), (SCD), (SCDS), ( one of S ₀₎ proceeds to step (# 91) if the turned ON, flag indicating when the battery attachment (BATF), In the next step (# 92), a flag (OPF) indicating that one of the five switches has been operated is set, the routine [S0] is executed (# 93), and the process returns to step (# 10). . Routine [S0] is a routine for performing photometry, AF, display, exposure control, and the like, which will be described later in detail.

In step (# 10), if none of the above five switches is ON and the battery is not installed (BA
In TF = 0), it is determined whether or not a flag (OPF) which is set once the routine has passed the routine [S0] is set (# 15, # 25). When this flag is set, the timer (T1) for holding power is reset and started, and the flag (OPF) is reset (# 30, # 35).
Here, the timer (T1) is reset and started (#
30) Once from step (# 10) to (# 91) (# 92)
After passing through the routine (# 93), the power supply holding is extended for a certain period of time in consideration that there is a possibility that the above five switches are not turned on, but there is a possibility of being turned on again. The reason for resetting the flag (OPF) (# 35) is to indicate that the process has passed step (# 30).

If the flag (OPF) is not set in step (# 25), steps (# 30) and (# 35) are skipped, and the reset-start timer is set to 10
It is detected whether or not seconds have elapsed (# 40), and if 10 seconds have elapsed (# 45), the process proceeds to the steps after step # 5 to turn off the display and stop the IC card (CD). If 10 seconds have not elapsed, the process proceeds to step (# 93), and the routine of [S0] is repeated.

Next, the control of the camera when the IC card (CD) is mounted will be described. When the IC card is mounted, a signal that changes from "L" level to "H" level is input to the terminal (CDINT), and FIG. The [CDINT] interrupt routine shown in (1) is executed. Then, upon entering this routine, the microcomputer (μC) sets a flag (OPF) to stop driving the lens and hold the power (# 290, # 292). Next, in order to give the highest priority to the display of the type of the mounted card, all other interrupts to this flow are prohibited in step (# 295) and step (# 210)
Proceeding to the subsequent steps, the type of IC card is displayed for a certain period of time as shown in FIG. 35 (a) or (b) as described above, and then a flag (CDFNF) is set to forcibly add a card function. All interrupts are permitted, and the process returns to the original flow [Step (# 10) in FIG. 3]. Switch (SEM), (SFU
One of N), (SCD), (SCDS), and (S ₀ )
When a signal that changes from “H” level to “L” level is input to the interrupt terminal (INT1) at any time, the operation of the interrupt [INT1] shown in FIG. 3 is started, and the flow after step (# 91) is started. Execute

Note that the clock starts oscillating regardless of which interrupt [INT1] [INT2] or [CDINT] is applied in the stopped (HALT) state, and the clock (IC) is also sent to the IC card (CD). φ) is sent.

Next, the routine of [S0] will be described with reference to FIG.

First, the interrupt of [INT1] for this flow is prohibited (# 400). This is because if an interrupt [INT1] shown in FIG. 3 occurs during this control, the control operation does not proceed further. Next, in (# 405), the terminal (P
W) to “H” level, and PN via inverter (IN1)
The transistor (Tr1) is turned on by applying a low level to the base of the P-type transistor (Tr1), and power is supplied to the photometric circuit (LM), the AF circuit (AFct), and the like. Next, input information specific to the interchangeable lens from the lens circuit (LE) (#
410). This is shown in FIG. 7 and explained. First, the terminal (C
SLE) is set to the “H” level (# 600), and serial communication is performed to input information from the lens (# 605). FIG. 36 shows the circuit in the lens. The clock input from the camera is counted by the decoder (2) to generate an address signal. At this time, when a predetermined address is reached, lens data that changes with zooming or lens data that changes with distance is obtained. Therefore, the encoders (3) and (4) that detect the focal length and distance determine the focal length and distance. The detected address is changed by the address circuit (5) according to the focal length or the distance, and predetermined data is output to the camera body. Switch (SQ)
Is the lens-side switch (No. 37) provided on the lens (10).
In this case, the address must be changed because the data must be changed. The address set in this way is output to the ROM. ROM (6)
Outputs data based on the specified address. This output is converted into a serial signal by a parallel / serial conversion circuit (7) and supplied to the camera body.

Next, the lens information will be described. As shown in Table 12, the lens information sent to the camera body includes the lens mounting signal, lens open aperture value (Av ₀ ), maximum lens aperture value (Av _MAX ), distance information, focal length information, Lens drive amount / defocus amount) conversion coefficient, ON / OFF of the lens-side switch (SQ), whether or not the lens can be driven (LOK), and the like. Input to RAM. The signal (LOK) is not particularly relevant on the camera body side of the present embodiment, but switches the address when the AF cannot be performed, and changes from "1" to "0" accordingly. . If AF is always possible, "1" is sufficient and 2 bytes are not required.
The camera body receives this signal to stop the motor.

On the other hand, the lens (10) has a ROM and address configuration as shown in Table 10. (A) and (B) are the same
Two similar data which differ only in the SQ relation and the LOK relation are stored in the ROM. Conventionally, there is relatively little lens information, and one type of ROM can store a plurality of types of lens information having the same function, and switch lens information according to the lens used. In this case, the amount of information per lens is fixed, and necessary
ROM is decided. In such a case, switch ON / OFF
Creating (increasing) new data that indicates that the data is changed means changing the address of the ROM according to the ON / OFF state of the switch, and changing the data by two bytes (O
N, OFF) is required. ROM per type
If there is enough time, as shown in Table 11,
Increase the number of bits and turn the lens side switch (SQ) OFF, ON
May be changed in accordance with, and 06H and 08H may be selected. However, when there is no such margin,
As shown in Table 10, the same data is used for ROMs provided for a plurality of types (in this embodiment, (B)) except for the data changed by the switch ON / OFF. ) Or (B) can be selected. However, in this case, the types of lenses that can be used for this ROM are reduced. When the lens-side switch (SQ) is OFF, 06H and 07H are sent, and when it is ON, 16H and 17H (b0 = 0, AF motor stop) are sent. In addition, in the address (xx
x) indicates that the address data is changed depending on the zoom or distance, and is input from the encoders (3) and (4).

The signal (LOK) in the lens indicates that the lens is not for AF. Upon receiving this signal, the camera body prohibits the AF operation (lens drive) and performs only the focus detection operation. Table 10 shows the lenses that can always perform the AF operation. For example, some macro-to-zoom lenses cannot perform AF operation when the macro mode is set.
= 0 (this is made possible by address change or ROM switching), and when not in the macro mode, the AF operation is permitted and b0 of LOK = 1.

Now, a lens with the function of the switch (SQ)
This lens-side switch (SQ) can be used even when attached to an old camera that does not read this bit (for new data).
(However, the latter two of the changes of functions by IC card-selection of focus lock, continuous, spot AF-cannot be done because the IC card is not the old camera, Only the focus lock is possible), the LOK signal is turned on in response to the ON of the switch (SQ).
If F is prohibited, the old camera is regarded as a lens that cannot perform AF, and the AF operation is prohibited, and only the focus detection is performed. To execute this, when the switch (SQ) is turned on, A in Table 10; 08H, 09H in Table 11; and, when the switch (SQ) is off, B in Table 10 and B in Table 11. 06H, 07
H and each may be changed.

Regarding the control on the old camera side, it is only necessary to determine whether or not to prohibit AF when reading the data of the lens and to control whether or not AF is prohibited, so that the description with reference to the drawings is omitted.

After inputting the lens information described above, the terminal (CS
LE) is set to the “L” level and the process returns (# 610).

Returning to FIG. 6, the microcomputer (μC) continuously inputs information on the electronic flash device from the electronic flash device (ST) (# 41).
Five). As the information, there are three pieces of information such as a guide number (GN) indicating a light emission amount, whether or not charging is completed, forced light emission, and automatic light emission (this will be described later). Here, the operation of the information communication method will be described. FIG. 9A shows an electronic flash device (S
T) and FIG. 9 (b) show circuit diagrams of the interface (IF), respectively.

First, the microcomputer (μC) is connected to the terminal (CSS
T) is set to the “H” level for a fixed time (t1), and this signal is output to the electronic flash device (ST). Electronic flash device (ST)
Detects the time (t1) of this signal, recognizes the data output mode, and outputs data according to a clock from the microcomputer (μC).

The interface circuit (IF) shown in FIG. 9 (b) outputs the signal of the terminal (CSST) of the microcomputer (μC) to the terminal (ST1) of the electronic flash device via the OR circuit (OR21). At this time, the signals input to the OR circuit (OR21) are both at the “L” level. In the electronic flash device (ST), the signal from the terminal (ST1) is input to the AND circuit (AND11), so that the AND circuit (AND11) becomes active, and the signal from the oscillation circuit (OSC) is countered (CNT12).
Output to The counter counts this and measures the time (t1). When the time (t1) is measured, the terminal (T1)
Is set to the “H” level, and the RS flip-flop (SR11) is set. At this time, the RS flip-flop (SR12) remains reset, and its output is at "H" level. Therefore, the AND circuit (AND12) is activated.

Next, the microcomputer (μC) outputs a serial communication clock (SCK). This clock (SCK) is output to the terminal (ST1) of the electronic flash device (ST) via the OR circuit (OR21) of the interface circuit (IF). In the electronic flash device (ST), an input clock (SCK) is input to a clock terminal of a parallel / serial conversion circuit (P / S) via an AND circuit (AND12). The parallel / serial conversion circuit (P / S) outputs a guide number (GN), a signal indicating a charging completion state, and a signal indicating whether forced light emission or automatic light emission is synchronized with a clock. The counter (CNT11) of the electronic flash device (ST) counts the input clock (SCK) and outputs an "H" level to the OR circuit (OR11) when a predetermined required number is counted. This signal is connected to the OR circuit (OR
11), input to the reset terminal of the counter (CNT12) via the one-shot circuit (OS11), and the counter is reset. The counter (CNT11) is a counter that resets when a predetermined number of clocks are counted.

In addition to the above circuit elements, the electronic flash device includes a battery (EST) as a power source, a booster circuit (UV) for boosting the voltage of the battery to a voltage required for flash light emission, and a booster circuit (UV) from the booster circuit (UV). Rectifier diode (D1
1), a main capacitor (MC) that stores energy required for flash light emission, a charge voltage detection circuit (CVD) that detects the charge voltage of the main capacitor (MC), and a light emission control circuit that controls start and stop of light emission (FCC).

Referring back to FIG. 6, the AF mode is determined in step (# 417). FIG. 6A shows this AF mode determination subroutine. First, it is determined from the lens information whether the above-mentioned lens-side switch (SQ) is ON (# 4).
000). If this switch is ON, reset and start the power holding time (start from 10 seconds)
In step (# 4005), the flag (OPF) is set, and then E
^2. Read information from the PROM and determine in step (# 4010) whether or not the AF mode set by the IC card is the focus lock mode. Here, in the case of the focus lock mode (MSb26, 27 = 1, 1), the bit (Fb14) indicating this is set, and the bit (Fb13) indicating the auxiliary light mode is reset. When it is, it is turned off (# 4020 to # 403
0).

This is because the AF operation is prohibited in the focus lock mode, so no subsequent AF operation is required.
This is to prohibit the emission of the auxiliary light required for this and to save power.

The follow-up display is also useless after the focus lock because the lens is not driven and the follow-up operation is not possible, so that the follow-up flag is reset and turned off.

Next, it is determined whether the AF mode set by the IC card (CD) is spot AF (# 4035). This step (# 4035) also comes when the focus lock mode is not set in the above step (# 4010). Here, in the case of spot AF (MSb26, 27 = 0, 1), the switch (SQ) is turned on, and it is determined whether a flag (SQONF) indicating that the flow has passed this flow for the first time is set (#). If it is determined in step 4036) that the bit (Fb) has not been set, the process proceeds to step (# 4037) to store the multipoint / spot mode before the switch (SQ) is turned on.
The contents of 2) are transferred to the bit (Fb15), and step (# 404)
Go to 0). If the flag (SQONF) is set, the step (# 4037) is skipped and the step (# 4037) is skipped.
4040). In step (# 4040), the bit (Fb2) indicating the spot AF is set, and in order to display this mode, regardless of the selection of the IC card, step (# 404)
In 2), a multipoint / spot display flag is set, and the flow advances to step (# 4045). If it is not the spot AF in step (# 4035), the process skips steps (# 4036 to # 4042) and proceeds to step (# 4045). Step (# 404
In 5), it is determined whether or not continuous AF is set. If continuous AF is set (MSb26, 27 = 1, 0), a bit (Fb8 = 1) indicating this is set (# 4050), and The bit (Fb13) indicating light is reset in step (# 4055), the flag (SQONF) indicating that the flow has passed is set in step (# 4057), and the routine returns. Now, it is assumed that the auxiliary light mode for the continuous AF is prohibited in consideration of power saving. In continuous AF where focus detection does not end, the auxiliary light is emitted every time focus detection (integration) is performed, so the power supply, which is a power source, is consumed quickly, and the number of films that can be shot decreases. It is. Continuous AF in Step (# 4045)
If not, the process proceeds to step (# 4057), and the flag (SQON
Set F) and return. Note that in the flow when the switch (SQ) is on, one of focus lock, spot AF, and continuous AF is used for IC cards.
Since only one is set, for example, if the focus is locked in step (# 4010), both of steps (# 4035) and (# 4045) become NO.

In the above step (# 4000), the switch (S
If Q) is OFF, proceed to step (# 4060). In this step (# 4060), the bit (Fb14) indicating the focus lock function is reset.

Next, in step (# 4061), it is determined whether or not spot AF / multi-point AF is set by the IC card (CD). If not, the multi-point / spot display flag is reset so as to erase the display of the multi-point / spot. Yes (# 4062). Then, it is determined whether or not the switch (SQ) has been turned off from ON (step # 406).
If it is determined in step 3) that the switch is turned off (SQONF = 1), the content of the bit (Fb15) is changed in step (# 4064) to shift to the multipoint / spot AF mode before the switch (SQ) is turned on. Move to bit (Fb2). If the switch (SQ) is not turned off from ON (SEONF = 0), the switch (SQ)
Step (# 4)
064) is skipped. In any case, the process proceeds to step (# 4080).

If it is determined in step (# 4061) that there is a setting, the process proceeds to step (# 4065) to execute the display of the multipoint / spot regardless of the selection by the card, regardless of whether the multipoint / spot can be selected. Set the display flag. Next, in step (# 4067), it is determined whether or not spot AF is set. If spot AF is set, a bit (Fb2) indicating this is set in step (# 4070).
In step (# 4075), this bit (Fb2) is reset (that is, set to multipoint AF), and each step (# 4080)
Proceed to. In step (# 4080), it is determined whether there is no description of one-shot AF / continuous AF. If there is no description, the process proceeds to step (# 4090), and Fb8 = 0 (one-shot AF) is set to step (# 4090). 4097). If there is a setting, it is determined in step (# 4085) whether or not it is one-shot AF.
The bit (Fb8) is reset to indicate this at 90), otherwise the bit is set at step (# 4095) (ie as continuous AF) and the flag (# 4097) is set at the next step (# 4097), respectively. SQONF) and return.

Referring back to FIG. 6, the microcomputer (μC) determines the type of the IC card (CD) after determining the AF mode described above.
Performs card data communication I with an IC card (CD) (# 42)
0). Since the card data communication I has already been described with reference to FIG. 5, the description is omitted here. After the card data communication, it is determined whether or not the flag (SETF) indicating that the IC card is mounted and the data setting mode is set is set in (# 425). Whether the AF start switch (S1) is ON or not is determined by the level of the terminal (IP6) (# 4
27). When the above switch (S1) is ON (IP6 =
"L" level), AF control is performed (# 429). On the other hand, when the flag (SETF) indicating the data setting mode is set, or when the switch (S1) is OFF (IP6 = “H” level), the AF driving motor is inhibited to inhibit the AF operation. Is output to the lens control circuit (LECN) to stop the lens drive (# 431), a flag (AFNF) indicating that AF is not being performed is set (# 435), and a switch (S1) The flag (S1ONF) indicating ON is reset (# 437). When the data setting mode is set, the AF control is prohibited and the data setting is prioritized, so that the AF operation is not performed even if the AF start switch (S1) is accidentally pressed during the data setting. Like that.

Here, the above-mentioned AF control will be described with reference to the flowcharts shown in FIGS. 10 (a) to 10 (f), with reference to FIG. 11 showing a focus detection range in a shooting screen. At this time, the photometric range will also be described.

First, in FIG. 11, the outer rectangle (12) indicates a shooting screen. Among them, (LM1) to (LM4) indicate the photometric range, and (AF1) to (AF3) indicate the focus detection range. In terms of focus detection range, the camera can switch between spot and multipoint AF. When spot AF is selected, AF is performed based on subject information in the focus detection range (AF2), and multipoint AF When selected, AF is performed so that a subject closest to the camera is focused out of the three ranges (AF1) to (AF3). Below, (AF1) is the first
Island, (AF2) second island, (AF3) third
I will call it an island.

To explain the AF control shown in the flowchart of FIG. 10 (a), first, the flag (S1ONF) is determined and set to detect whether the AF start switch (S1) is pressed for the first time. If not, it is determined that the button has been pressed for the first time, and the flag (AFEF) indicating focus is reset in step (# 702), and the flow advances to step (# 705). If it is set, the process directly proceeds to step (# 705) without passing through step (# 702). Then, it is determined whether or not the lens is mounted based on the input signal from the lens (# 70).
Five). If the lens is not mounted in step (# 705), a flag (AFNF) indicating that AF is not performed is set and the routine returns (# 800).

If a lens is attached, the focus adjustment mode
Whether the current mode is the AF mode or the M mode is determined based on the level of the terminal (IP10) (# 710). ).
In the M mode, the auxiliary light mode is prohibited in step (# 798) (Fb13 = 0), and AF is not performed after executing the manual focus subroutine [MFOCUS] in the next step (# 799). Is set (# 800), and the process proceeds to step (# 780) to determine whether or not the camera is in focus. If in-focus, the flag (AFEF) is set. If not, the flag (AFEF) is reset and the routine returns.

This manual focus subroutine will be described with reference to FIG. 10 (d). First, a flag (MFF) indicating manual focus is set, and integration control for controlling integration and executing data dump is performed. And in manual focus, of the three islands in the AF area,
The flag (AF2F) indicating the second island is set, the defocus amount (DF2) of this island is calculated, and this is set as the defocus amount and the process returns (# 4100 to # 4100).
4110).

The subroutine of the integration control in the above step (# 4101) is shown in FIG. 10 (b) and explained. First, when the focus cannot be detected (LCONF = 1) or when the mode is not the auxiliary light mode (Fb13 = 0). Performs integration without performing auxiliary light emission, performs data dump after completion of integration, and returns (# 4150, # 4155, # 4165, # 4170). When focus detection is not possible and the mode is the auxiliary light mode, light is emitted before the start of integration, and the terminal (OLD) is set to the "H" level for a certain time to perform light emission for a certain time to perform integration ( # 4150 to # 4170).

Returning to FIG. 10 (a), steps (# 710) and (# 7)
If the focus lock is selected in the AF mode as a result of the determination in step 11), the lens driving is stopped in step (# 712), and it is determined whether the lens is in focus by setting the flag (AFEF). If it is set (# 713), the flow proceeds to step (# 714), the M focus is controlled, and the flow proceeds to step (# 780). If not set, the process proceeds to step (# 799). Here, the focus is determined because if the focus is locked after focusing, the photometric value is determined using the distance data of the subject at the time of focusing (used for image magnification) when determining the photometric value. It is.

AF is determined in step (# 710) of FIG. 10 (a),
After the focus is locked in the next step (# 711), the flag (AFNF) indicating that AF is not performed is reset in step (# 715), and the step (# 71) is performed.
In step 7), reset the flag (MFF) indicating manual focus. The microcomputer (μC) controls the accumulation (integration) of the charge generated in the CCD for distance measurement according to the amount of incident light,
After the integration, data obtained by digitally converting the integrated value is input (# 720). And the step (# 730)
To detect spot AF or not (detected by Fb2 of function data)
If it is spot AF (Fb2 = 1), step (# 73)
Proceeding to 5), the spot AF subroutine shown in FIG. 10D is executed. In this subroutine, a flag (AF2) indicating that AF is being performed based on the second island
F) is set, the defocus amount (DF2) of the second island is calculated from the input data, and this is set as the lens drive defocus amount (# 4102 to # 4110).

On the other hand, if the multi-point AF mode is selected in step (# 730) of FIG. 10 (a), the process proceeds to step (# 740) to execute the normal AF control subroutine shown in FIG. 10 (c). I do. At this time, the defocus amounts (DF) of the first, second, and third islands are calculated, and the defocus amount for the subject closest to the camera is calculated (# 42).
00 to # 4215).

The subroutine for determining the defocus amount is shown in FIG. 10 (f). The defocus amount is negative when the front focus (the subject is far from the focus position of the lens) and negative when the front focus (the subject is far from the focus position of the lens). In the case of (the camera side from the focus position of the lens), a positive defocus amount is indicated, and its absolute value indicates the magnitude of the defocus, and three islands are required to detect a subject closest to the camera. It is sufficient to detect the maximum (including positive and negative) defocus amounts among the defocus amounts described above, and it is assumed that the main subject exists in the focus detection area.

In FIG. 10 (f), the microcomputer (μC) first resets the flags (AF1F to AF3F) indicating the island, detects the largest defocus island, and uses the detected island defocus amount as the lens driving defocus amount. The above flags (AF1F to AF1) according to the island
3F) and return (# 810 to # 865).

After calculating the defocus amount, it is checked in step (# 745) in FIG. 10 (a) whether focus detection is not possible (data is unreliable) (for example, it is determined whether the contrast is low, If the focus detection is not possible, the process proceeds to step (# 747) to determine whether the mode is the auxiliary light mode, and if the mode is the auxiliary light mode, further focus detection is performed. Since it is useless, a flag (LCONF) indicating this is set (# 752),
The flag indicating the tracking mode (described later) is reset (# 755), and the process returns. In step (# 747), if the mode is not the auxiliary light mode, the process proceeds to step (# 757) to detect whether the luminance is low. If the luminance is not low, it is useless to emit the auxiliary light. # 75
Proceed to 2) and perform the same processing as described above.

On the other hand, when the brightness is low, the auxiliary light mode (Fb13 = 1) is set in step (# 760), and the process proceeds to step (# 755).

Next, when the microcomputer (μC) cannot detect the focus, the microcomputer resets the flag (LCONF) (# 762) and determines whether or not the lens is in focus from the lens driving defocus amount (# 76).
If it is determined in 5) that the object is in focus, the flag (AFEF) indicating the in-focus state is set (# 767), and the flag (AFEIF) is set, and the process proceeds to step (# 755).

If focus is not achieved in step (# 765), the flow advances to step (# 775) to execute a lens drive control subroutine, and then returns. This subroutine will be described with reference to FIG. 10 (e). One-shot AF (stops driving the lens once the focus is achieved, focus detection may be stopped at this time) or continuous AF (focus It is determined whether the object follows the subject even after focusing and the lens is driven in accordance with the obtained defocus amount) (F48) (# 4250). In the case of one-shot AF (Fb8 =
0) It is determined (# 4255) whether or not the flag (AFEF) indicating the focusing is set. After () (# 4330), the process proceeds to step (# 4340) to control the lens drive. In step (# 4327), the flag (AFEF) indicating the focus is reset, and step (# 4327) is executed.
In 4330), the lens drive amount (LN) is calculated by multiplying the defocus amount (DF) by the K value, and the lens is driven in step (# 4340) and the process returns. The lens drive in this step (# 4340) is performed by the lens drive circuit (LECN) driving the lens by a value corresponding to the drive amount (LN).

In step (# 4255), if the in-focus flag (AFEF) is set,
Proceeding to 60), it is determined whether or not a flag (AFEIF) indicating that focusing has been performed from an out-of-focus state is set. If it is set, preparation processing for following determination (determining whether the subject is moving) to be described later is performed. First, in step (# 4265), the registers (DF2) and (DF3) for storing the defocus amount are reset, and the obtained defocus amount (DF) is stored in the same register (DF1) (# 4270). Variable (N) is set to 0 (#
4275), reset the above (AFE1F) (# 4280) and return. In step (# 4260), after focusing (AF
EF = 1) When performing focus detection for the second and subsequent times (AFE1F =
0), the process proceeds to a step (# 4285), the defocus amount is sequentially stored in a register for storing the defocus amount, and the contents of the register (DF2) are stored in the register (DF3).
The contents of the register (DF1) are stored in the register (DF2), and the obtained defocus amount (DF) is stored in the register (DF1).] 1 is added to the variable (N). Thereafter, it is determined whether or not focus detection has been performed three times. If the focus has not been detected twice or more, the process returns without driving the lens (# 4285 to # 43)
05).

In step (# 4305), if the operation has been performed three times or more (N ≧ 2), the process proceeds to step (# 4310) and the past three
The defocus amount is obtained by the average of the defocus amounts of each time (the average of the contents stored in the register), and in the next step (# 4315), it is determined whether or not this value is equal to or larger than a predetermined value KDF. This means that it has been determined whether or not the subject is moving at a predetermined speed (on the image plane) in the past three focus detections. If it is less than the predetermined value, it is determined that the subject has not moved, the tracking flag is reset (# 4320), and the process returns.

This flag is used for display (in finder). On the other hand, when the defocus amount is equal to or more than the predetermined value, when the subject is moving, a flag (following F) is set as the following mode (# 4325) and the step (# 4325) is performed.
4327), the focus display flag (focus F) is reset (this is because the subject has already been moved, so this is reset), and the lens drive amount is set to the K value (lens (Drive amount / defocus), the lens is driven, and the process returns (# 4330, # 4340).

Here, the display in the finder relating to focus detection will be described based on the display in the finder shown in FIG. 38. (101) indicates that the focus or the focus cannot be detected. When set based on F), the LED is turned on by the edge LED, and otherwise, it is turned off when the focus is F = 0. When the focus cannot be detected (LCONF = 1), the LED is turned on and off by a red LED, and when not (LCONF = 0), the LED is turned off. (102)
A focus detection area is shown. When the inner area (102a) is displayed, spot AF is shown, and when only the outer area (102b) is displayed, multipoint ranging is shown. (103) is displayed when the continuous mode or the following mode is indicated (following F = 1), and is turned off when not in the continuous AF mode or the following mode. (104) “AF / M” is AF
In the mode (AFNF = 0), AF display is performed. In other cases (AFNF = 1), M display is performed. In addition, AF switch (S1)
When OFF (S1OFF = 0), the display in the viewfinder is turned off.

Returning again to FIG. 6, the microcomputer (μC) controls change of various data by operating various key switches (# 440).

This is shown in FIG. 12 and described. First, the state of each key switch is confirmed and stored in memory (# 900). Next, it is determined whether or not the flag (SETF) indicating the card setting mode is set in (# 905), and the flag (SET
When F) is set, the process proceeds to step (# 945). When the flag (SETF) is not set,
Proceeding to step (# 910), it is determined whether the exposure mode change switch (SEM) is ON. If the switch (SEM) is ON, the process proceeds to a subroutine (# 915) for this change and returns (details will be described later). If the switch (SEM) is not turned on, the process proceeds to step (# 920) and the function change switch (SF)
UN) is turned on. When the switch (SFUN) is ON, the process proceeds to a subroutine (# 925) for the change and returns.

Here, the two subroutines will be described with reference to FIGS. 13 and 14, respectively. First, the exposure mode is changed. Each time the up switch (Sup) is turned on once, P → A
It proceeds in a cyclic manner so that it proceeds to → S → M and further returns to P. Each time the down switch (Sdn) is turned ON once, it proceeds in the order of P ← A ← S ← M, and next to P is M. As it advances, it cyclically advances in the direction opposite to the above-described upward direction, but is changed according to the exposure mode set by the IC card (CD), and the mode not selected is skipped.

This will be described with reference to FIG.
C) is the up switch (Su) in step (# 1000).
It is determined whether or not p) is turned on. If not, the process proceeds to step (# 1055). If it is ON, proceed to step (# 1005), and RAM function data (Fbn)
(Fb0) and (Fb1) are checked to determine whether the P mode is currently selected as the control exposure mode. If the P mode is selected, the process proceeds to step (# 1010) where the A mode is selected by the IC card. Do you have an internal E ² PROM (MSb6) ~
(MSb8) (Refer to Table 4) If it is determined and selected, the exposure mode is changed from P to A, and the function data (Fb0,
(Fb1) from (0,0) to (0,1) and return (# 1
015). When it is determined in step (# 1010) that the A mode has not been selected by the IC card, the process proceeds to step (# 1025), where it is determined whether the S mode has been selected. If not, the process proceeds to step (# 1040) to search for the M mode and to sequentially search for the mode selected by the card. Then, if there is a selected mode, it is set. When the A, S, and M modes are not selected, that is, when only the P mode is selected, the P mode is set (# 1050).

Similarly, when the A mode is selected as the control exposure mode (Fb0, Fb1 = 0, 1), the S mode is selected by the IC card, or the M mode is selected when it is not selected. Is determined, the exposure mode is changed to the selected mode, and bits (Fb0) and (Fb1) are set.
And return (# 1020 to # 1030).

When the S mode is selected as the control exposure mode (Fb0, Fb1 = 1, 1), it is determined whether the M mode is selected by the IC card.
If the mode is not selected, the mode is set to the P mode and the process returns (# 1035 to # 1045). Control exposure mode is S
If the mode is not the mode, that is, if the mode is the M mode, then the mode is the P mode. This is because the P mode is always selected in this embodiment.

Down switch (Sdn) in step (# 1055)
Is ON, the same control as that of the above-described up switch (Sup) is performed, except that the direction of changing the exposure mode is different.

When both switches (Sup) and (Sdn) are OFF, the process returns without doing anything.

Next, the function change switch (SFUN) shown in FIG. 14 (a)
The control when is turned ON will be described. The microcomputer (μC) has four functions, namely, highlight / shadow (H /
S), exposure compensation (+/-), single / continuous (S / C), spot AF / multi-point AF (S / A)
Detection is performed using the bits (Msb0 to MSb3) of the E ² PROM. If none of these bits is set, the process returns as there is no mode selection (# 1200). If at least one is set, it is determined that at least one mode has been selected, and the data change step (# 12
05) Execute the following flow. The microcomputer (μC) determines whether or not a switch (SSE) indicating a function to be changed is turned on. If the switch (SSE) is turned on, the function to be changed is determined.
H / S → +/− → S / C → S / A, then proceed to cyclic after returning to H / S after S / A, but if no function is selected by IC card , Is to jump over it. In step (# 1210), when the function to be changed indicates the H / S mode (see R5 shown in Table 5).
AM data CDb0, CDb1, CDb2 = 0, 0, 0), +/- mode is I
Check if it is selected by C card (# 1215)
In determined by E ² PROM bits (MSB1), + / - when the mode is selected, + / - and mode data change mode, the process returns as data CDb0~CDb2 = 0,0,1 (# 1220). If the +/- mode is not selected, the process proceeds to step (# 1227), and it is determined whether the S / C mode is selected by (MSb2). If the S / C mode is not selected (MSb2 = 0), Goes to step (# 1240) and A /
Determines whether the S mode is selected by (MSb3),
If this is not selected (MSb3 = 0), the process further proceeds to step (# 1250) to determine whether the H / S mode is selected (MSb0). Now, at least H / S mode is selected, so to change the function of H / S mode, CDb0
~ CDb2 = 0,0,0. When S / C mode and A / S mode are selected, CDb0 is set to change this mode.
Set ~ CDb2. Similarly, the mode following the mode of the function to be changed (H / S mode: +/- mode, +/- mode)
-Mode, S / C mode, S / C mode, S / A mode, S / A mode, H / S mode). If not selected, H / S → +/− → S / C → S /
The function selected by the IC card is searched in the order of A → H / S--, the data CDb0 to CDb2 are set as functions to change the selected function, and the process returns.

As can be seen, modes not previously selected by the card will be skipped over in the change mode. For example, the selected modifiable modes are +/- and S / C
If the function change switch (SFUN) is pressed, the flow goes to step (# 1225), where the flow goes to step (# 1227), where the S / C mode is to be changed. This means that the cursor moves from +/- to S / C on the display. Next, when the function change switch (SFUN) is pressed again, the flow goes to step (# 1235), from which step (# 1240) → (#
1250) → (# 1215), and the mode to be changed becomes +/-, and the cursor on the display moves to +/-. In these cases, since the H / S mode and the A / S mode are not selected, the setting of the change mode is substantially skipped.

In step (# 1205), the switch (SSE) is turned on
If not, go to step (# 1265). In step (# 1265), it is determined whether the up switch (Sup) is turned on. If the switch is turned on, it is determined from the data (CDb0 to CDb2) what the function to be changed is now. If it is the S mode, the currently set mode is determined by the data (Fb6) and (Fb7), and the next mode (→ H →
The data (Fb6) and (Fb7) are set (# 1270, # 1275) in order to shift to S → no H / S, and the process returns.

If the function is in the +/- mode (# 1285), 0.5 is added to the exposure correction amount (△ Ev), and the process proceeds to a subroutine (# 1287) for determining the magnitude. This subroutine is shown in FIG. 14 (b). If the correction amount (△ Ev) is positive, the data Fb4, Fb5 = 0,1 as the + side correction, and the data Fb4, Fb5 = It is set to 1,0, and if the correction is zero, it is determined that there is no correction, the data Fb4, Fb5 = 0,0, and the process returns (# 1350 to # 1370).

Returning to FIG. 14 (a), if the mode is the S / C mode, it is determined whether the current mode is single shooting (S) or continuous shooting based on the data (Fb3), and the current mode is reversed. (# 1295) and return. The above three modes (H /
(S mode, +/- mode, S / C mode), ie, S / A mode, the current mode is spot AF
(S) or multipoint AF (A) is determined by the data (Fb2), and the data (Fb
2) Change (# 1300) and return.

Up switch (Sup) in step (# 1265)
When the switch is not turned on, the process proceeds to step (# 1305), and it is determined whether the down switch (Sdn) is turned on. If not, the process returns. If ON, H /
When the mode in the S mode is changed, the order of the change is reverse (← H ← S ← H / S no ←), and in the +/− mode, the exposure correction amount (△ Ev) is increased by 0.5Ev Since the flow is the same as when the up switch (Sup) is ON except for subtracting, the description is omitted (# 1310 to # 134).
0).

Referring back to FIG. 12, when both the exposure mode change switch (SEM) and the function change switch (SFUN) are OFF, the aperture value (Av) and the shutter speed (Tv) by the up switch (Sup) and the down switch (Sdn). Then, the process proceeds to a step (# 927) showing a subroutine for changing the number.

This subroutine is shown in FIGS. 21 (a) and 21 (b) and will be described. First, the microcomputer (μC) operates the up switch (Su
It is determined in step (# 1800) whether or not p) is turned on. If not, the process proceeds to step (# 1805) to determine whether or not the down switch (Sdn) is turned on.
If not, return. Up switch (S
When (up) is ON, the process proceeds from step (# 1800) to step (# 1810) to determine whether or not the mode is the M mode. Here when a M mode (Fb0, Fb1 = 1, 0), the flow advances to step (# 1811), M1 mode (up, only the operation of the down switch, the shutter speed changes) whether a, E ₂ The determination is made based on the bit (MSb28) of the PROM. If the mode is the M1 mode (MSb28 = 0), it is determined in the next step (# 1821) whether or not the aperture change switch (SAv) is turned on. If (IP13 = “L”), the process proceeds to step (# 1830) to change the aperture.
"H"), a step (# 18) to change the shutter speed
Proceed to 23). First, let's talk about changing the shutter speed.
Whether this speed change is performed in 1/2 Ev increments or 1 Ev increments is determined by the bit (MSb29) of the E ² PROM (# 1823), and 1
/ 2Ev setting mode (MSb29 = 1), the step (# 1
850), add 0.5 to the current shutter speed (Tv), and further proceed to step (# 1855). On the other hand, 1Ev
When performing in steps (MSb29 = 0), step (# 1824)
To determine if the current shutter speed is Ev / 2,
If the setting value of / 2 is [0.5 of Tv = 6.5 (SS 1/90)], 0.5Ev is added to this at step (# 1825) [Tv = 6.5
→ Tv = 7 (SS 1/90 → SS 1/120)], in units of 1 Ev, add 1 Ev to this value in step (# 1826), and proceed to step (# 1855). In step (# 1855), it is determined whether or not the set shutter speed has exceeded the maximum speed (Tv _max ). If the shutter speed has exceeded it, the shutter speed is limited to the maximum speed (# 1860) and the process returns. If not, step (# 1860) is skipped and the routine returns. In step (# 1821), when the aperture change switch (SAv) is ON, it is determined that the aperture value change mode is set, and in step (# 1830), 0.5Ev is added to the aperture value (Av), and this is the maximum controllable value. It is determined whether or not the aperture value (Av _max ) is exceeded (# 1835). If it exceeds, set the maximum aperture value (Av _max ) as the aperture value (Av) (# 184
0), if not exceeded, do nothing (# 184)
Proceeding to 5), it is determined whether or not the mode is the P mode. If the mode is the P mode, the process proceeds to the step (# 1879) in the flowchart of FIG. 21B. When the mode is not the P mode, the process returns. In step (# 1811), if the mode is not the M1 mode (MSb28 = 1), it is determined in step (# 1822) whether or not the aperture change switch (SAv) is turned on. , Step (# 18
To 23), if it is not turned on, the aperture is changed, and the process proceeds to step (# 1830).

If the mode is not the M mode in step (# 1810), whether the mode is the P mode in steps (# 1815) and (# 1820)
It is determined whether the mode is the mode or not. If either the P mode or the A mode (Fb0, Fb1 = 0, 0 or 0, 1), the process proceeds to step (# 1830) to increase the aperture value (Av). Control,
Neither, ie, when in S mode (Fb0, Fb1 =
(1,1) proceeds to step (# 1823), and the shutter speed (T
v) Perform up control.

If the down switch (Sdn) is ON in step (# 1805), the process proceeds to step (# 1865) in FIG. 21 (b), and it is determined whether or not the mode is the M mode. (Fb0, Fb1 = 1, 0), proceed to step (# 1876), and
Mode or not, and when the mode is M1 (MS
b28 = 0), it is determined whether or not the aperture change switch (SAv) is turned on (# 1877). If it is turned on, the process proceeds to step (# 1855) as aperture change. If it is not turned on, the shutter speed is changed. And proceed to step (# 1879). In step (# 1879), it is determined whether or not the mode is the 1/2 Ev interval setting mode, and if the mode is the 1/2 Ev interval (MSb29 = 1),
Proceed to step (# 1905) to set the shutter speed
0.5Ev is subtracted and this is the camera's minimum shutter speed (T
_vmin ) is determined (# 1907). If it is slower, the shutter speed is limited to the minimum shutter speed (# 1908). If not, the process returns without doing anything. 1Ev increments (M
(Sb29 = 0), it is determined whether or not the current setting value is in 1 / 2Ev units. If the current setting value is in 1 / 2Ev units, 0.5Ev is added, 1.0Ev is subtracted from the added value, and the process returns (#) 1880 ~ # 188
2). In step (# 1880), if the value is not a 1/2 Ev unit, in step (# 1882), 1.0Ev is subtracted from this value, and the flow advances to step (# 1907). When it is determined in step (# 1877) that the aperture change mode is set (SAvON), in step (# 1885), the aperture value (Av) is reduced, 0.5Ev is subtracted, and then in step (# 1890), the aperture value becomes the open aperture. It is determined whether or not the value is smaller than the value (Av _o ). If the value is smaller, the aperture value is set to the open aperture value (Av _o ) (# 1895).

Next, it is determined in step (# 1900) whether or not the mode is the P mode. In step (# 1890), if the aperture value (Av) is not smaller than the open aperture value (Av _o ), the process skips step (# 1895) and enters step (# 1900). If it is determined in step (# 1900) that the mode is the P mode, the process proceeds to the control flow (# 1823 to # 1860) for increasing the aperture value in FIG. 21A described above.

In step (# 1876), when the mode is not the M1 mode (MSb28 = 1), the process proceeds to step (# 1878) to determine whether or not the aperture change switch (SAv) is turned on. The process proceeds to step (# 1879) to change the speed, and if not turned on, proceeds to step (# 1885) to change the aperture.

In step (# 1865), if the mode is not the M mode,
In steps (# 1870) and (1875), P mode or A
It is determined whether the mode is the mode. If the mode is the P mode or the mode is the A mode, the process proceeds to the flow for controlling the aperture value down from step (# 1885). Go to # 1879) to control the shutter speed down.

Returning to FIG. 12, a step (# 92) showing a subroutine for changing the aperture value (Av) and the shutter speed (Tv) described above.
After going through 7), proceed to step (# 930). In this step (# 930), it is determined whether or not the normally open switch (SCD) for enabling / disabling the function set by the card is turned on.
The process proceeds to the subroutine of 935) Card function enable / disable switch ON (SCDON).

This is shown and described in FIG. First, the steps (# 14
In (00), it is determined whether or not an IC card (CD) is loaded in the camera based on the data (Ckb0). If no IC card is loaded (Ckb0 = 0), the process immediately returns. If a mode setting card is loaded, the card function enable / disable switch (SCD) is operated to determine whether or not a flag (CDF) indicating that the flow has been passed once is set (# 1405). ). If it is set, the operation returns assuming that the valid / invalid switching has already been performed during the operation. If not set, proceed to the next step (# 1410) and set this flag (CD
F) is set, and in step (# 1415), a flag (CDFNF) indicating whether the card function is valid / invalid is determined. If not set, the card function is set to valid (# 1420), and the card function is set. If so, reset and disable the card function (# 1425) and return.

The flow when the card function enable / disable switch (SCD) is ON in the determination at step (# 930) in FIG. 12 has been described with reference to FIG. 15 as described above. Enable / disable switch (SC
If D) is OFF, proceed to step (# 940).

The flow of this step (# 940) will be described with reference to FIG. 16. First, in step (# 1450), it is determined whether or not the IC card is mounted. If the IC card is not mounted (b0 of 20H) = 0) is returned, and when an IC card is loaded (20H, b0 = 1), the process proceeds to step (# 1455) and the flow after step (# 1405) in FIG. It is determined whether or not the flag (CDF) indicating is set. If the flag (CDF) is set, in the next step (# 1460), the flag is reset and the process returns. If is not set, the routine returns.

Returning to FIG. 12, the microcomputer (μC) next proceeds to step (#
945) Normally open switch (SCD) for changing the mode by IC card or setting and resetting the data setting mode
S) is determined to be ON or OFF, and if this is ON or OFF, the step (# 95) related to the control of each subroutine is performed.
5) Return through (# 950). This is shown in Fig. 17,
This will be described with reference to FIG.

First, FIG. 17 shows a subroutine when the switch (SCDS) is ON. The microcomputer (.mu.C) determines in step (# 1500) whether or not a mode setting card is mounted. If not (b2 = 0 at 20H), return immediately. When the mode setting card is inserted (b2 of 20H = 1), it is determined whether a flag (CDSF) indicating that the flow has passed once is set (# 1510), and the flag is not set. In this case, this is set (# 1515), and if set, the process skips step (# 1515) and returns.

Next, a subroutine for turning off the switch (SCDS) shown in FIG. 18 will be described. First, it is determined in step (# 1550) whether or not a mode setting card is mounted. = 0), return. Even if it is attached (b2 = 1 of 20H), it is determined whether or not the switch (SCDS) is operated and the flag (CDSF) indicating that the flow of [SCDSON] is executed is set. If the flag (CDSF) is not set in step (# 1555), the process returns (# 1555). When the flag (CDSF) is set, the switch (SCDS) is turned off to enter or release the data setting mode.
N, which has been turned off, it is determined whether or not a flag (SETF) indicating the data setting mode is set in order to determine either of them (# 1560). As a result, if it is determined that the flag is set, the flag (SE
The TF) is reset in step (# 1570), followed by step (sets the flag (WRTF) indicating the data writing in # 1572) to E ² PROM, releasing the data setting mode by the operation of the switch (SCDS) is Assuming that the process has been completed, the flag (CDSF) is reset in step (# 1575) to release the data setting mode. If not set, this flag (SETF) is regarded as a transition to data setting mode.
Is set (# 1565), the flag (CDSF) is reset (# 1575), and the routine returns.

When the control of the key setting shown in FIG. 12 is completed as described above, the microcomputer (μC) returns to the step (#) in FIG.
The process proceeds from step 440) to step (# 445), where the photometric data is input from the photometric circuit (LM), and a spot photometric value used for exposure is created. Here, the photometric range shown in FIG.
The creation of photometric values will be described with reference to the flowchart of inputting and creating photometric data of the microcomputer (μC) shown in the figure. In FIG. 19, first, the microcomputer (μC)
It is determined in step (# 1600) whether or not a flag (AELF) indicating lock is set. If the flag (AELF) is set, the process returns because the photometric value is not updated. When the flag (AELF) is not set, the terminal (CSLM) is set to “H” level and the photometry circuit (L
M), and issues a photometric data output command to perform serial communication (# 1605, # 1610).

Through this communication, the luminance values (Bv1 to Bv4) of the four photometric ranges shown in FIG. 11 are input. When the communication is completed, the terminal (CSLM) is set to the “L” level (# 1615). Then, in the next step (# 1620), it is determined whether or not the spot metering is selected. When the spot metering is selected (Fb12 = 1), the brightness value (Bv2) of the metering range (LM2) is changed to the spot value (Bvsp). ) (# 1660). If the mode is the multi-point mode (Fb12 = 0), the process proceeds from step (# 1620) to (# 1622), and it is determined whether or not a flag (AFNF) indicating that the mode is not the AF mode is set, and further, step (# 1624) It is determined whether or not the flag (LCONF) indicating that focus detection is not possible is set, and if either is set, the small photometric range (LM2) at the center is returned as a spot value (Bvsp). . When the flags (AFNF) and (LCONF) are not set, the image magnification β is calculated from β = focal length / distance based on the distance information and focal length information input from the lens (# 1625), and the next step ( # 1630)
It is determined whether or not the image magnification β is equal to or larger than a predetermined value (KB), and the size of the subject occupying the photographing screen is determined. If the value is equal to or larger than the predetermined value, the subject is determined to be large, and in step (# 1640), the average of the luminance values (Bv1), (Bv2), and (Bv3) of each of the photometry ranges (LM1), (LM2), and (LM3) is calculated as the spot Bvsp).

If the image magnification β is less than the predetermined value, the photometry range including the focus detection range used for focus detection is set as the photometry value (Bvsp) of the main subject. In the present embodiment, of the flags indicating the focus detection ranges, the range is determined by which flag (AF1F to AF3F) is set, and the flag (AF1F)
Is set, the luminance value (Bv1) of the photometric range (LM1) is set. If the flag (AF2F) is set, the luminance value (Bv2) of the photometric range (LM2) is set. If not, ie, the third island (AF3)
When the defocus amount is selected, the brightness value (Bv3) of the photometric range (LM3) is set to the spot photometric value (Bvsp), respectively.
(# 1645 to # 1665). Then, it is determined whether or not the subject is in focus. If the subject is in focus (AFEF = 1), the AF / AE lock is performed.
The AE lock flag (AELF) is set, and when out of focus (AFEF = 0), the AE lock flag (AELF) is reset and the routine returns.

When the spot photometric value is determined in this way, the microcomputer (μC) proceeds to step (# 450) in FIG.
The control relating to the E lock is performed, and this will be described with reference to the flowchart shown in FIG. Here, to release the AE lock, if the AE lock switch (SAEL) is pressed once, the AE lock will be applied as long as the AE lock switch is pressed.
Press the AE lock switch (SAEL) again or release the power self-holding mode to release the AE lock (10
(Second hold mode) and a mode in which the AE lock state is set only while the AE lock switch is pressed. These modes are selected by the IC card. In FIG. 20, the microcomputer (μC) first determines in step (# 1700) which of the two modes is E ²
The determination is made based on the PROM data (MSb5). In the 10-second hold mode, the process proceeds to step (# 1705) to determine whether or not the AE lock switch (SAEL) is turned on.
If not, the flag (AEONF) indicating that the AE lock switch has been operated and the flow from step (# 1705) has been executed is reset (# 1710), and the routine returns.

In step (# 1705), the AE lock switch (S
If (AEL) is ON, it is determined in step (# 1715) whether or not the flag (AEONF) is set. If it is set, the process returns immediately. If it is not set, the process proceeds to step (# 1720), and it is determined whether a flag (AELF) indicating that the AE lock operation is working is set. If the flag (AELF) is not set, Assuming that operation was performed to perform AE lock, set this (# 1730). If the flag (AELF) was set, reset the flag (AELF) as being operated to release it while AE lock was operating (# 1725), and proceed to the respective steps (# 1735), and the AE lock switch (SAEL)
Has been operated, a flag (AEONF) indicating that this flow has been executed is set, and the routine returns.

In step (# 1700), if the mode is not the 10-second hold mode, it is determined in step (# 1740) whether the AE lock switch (SAEL) is turned on, and if not, the flag (AELF) is reset. Yes (# 175
Five). If it is ON, the flag (AELF) is set (# 1745), the timer (T1) for holding power is reset and started (# 1750), and the routine returns. Thus, when the AE lock switch (SAEL) is ON, the power is kept.

In FIG. 6, when the control of the AE lock is completed, the microcomputer (μC) performs data communication with the card for the second time in step (# 455). This data communication will be described with reference to FIG. 5 (b). In step (# 325), the microcomputer (μC) determines whether or not a card is mounted, and if the card is not mounted (Ckb0 = 0). ) Return without performing data communication. When a card is mounted, the terminal (CSCD) is set to the “H” level (# 330), and data is output to the IC card (CD) (# 335), indicating that the IC card is on the input side. Then, step (# 340)
It is determined whether or not the IC card mounted on the camera is a mode setting card in step (2). If the IC card is in the data setting mode (b2 of 20H = 1), the sensing is performed in step (# 900) of FIG.・ Set switch data stored in memory (# 344), and perform serial communication (# 348)
Outputs switch information to an IC card (CD). Thereafter, the terminal (CSCD) is set to the "L" level (# 350), and the routine returns.

If it is not a mode setting card in the determination in step (# 340), that is, if it is a program card (20H
B2 = 0), exposure calculation data, flash data, and lens data required for exposure calculation are set, serial communication is performed, and these data are output to an IC card. Is set to the "L" level to end the data communication and return (# 346 to # 350).

The exposure calculation data includes photometric values (Bvs), (B
VAv), film sensitivity (Sv), and data indicating whether the film is a positive film or a negative film. Lens data includes focal length data, open F-number (Av _o ), and maximum aperture value (Av _max )
However, as the flash data, data indicating whether the flash is forcibly fired or auto, the flash not attached (power off
GN (guide number), data on the presence or absence of charging, and the like.

After completing the above card data communication (II) in FIG.
The microcomputer (μC) proceeds to step (# 460) and performs an exposure calculation here.

The flow of this control will be described with reference to FIGS. 22 to 26. First, the microcomputer (.mu.C) executes the step (# 200) in FIG.
0) How much exposure (量 Ev1) is always corrected
Determined from MSb32~MSb34 of E ² PROM, this exposure value is manually set (△ Ev) was added to calculate a new exposure compensation amount (# 2001). Then, in step (# 2002), it is determined from the input lens data whether the lens is mounted,
When it is not attached, the film sensitivity (Sv) and the exposure compensation value (△ Ev) are applied to the metering value (BVAM) of the metering range (LM4) similar to the actual aperture metering (LMV may be used instead of this). ), Calculate the shutter speed, and return (# 2005). If a lens is attached,
Perform exposure calculation according to each exposure mode (# 2010- # 204
0).

Therefore, the exposure calculation in the P mode is performed by using FIGS. 23 (a) to 23 (c).
First, in step (# 2100) of FIG. 23 (a), the microcomputer (μC) determines the backlight state by comparing the photometric value (BVAM) of the photometric range (LM4) with the photometric value (BVAM).
A determination is made based on whether or not the difference from the spot photometric value (Bvsp) obtained in step 2 is equal to or greater than 2 Ev (# 2100). If it is 2 Ev or more, it is determined in step (# 2105) whether or not the electronic flash device is ready to emit light (the main capacitor is completely charged). If the electronic flash device is ready to emit light, the terminal (FLOK) is set to “H”. Level (# 2110), enabling flash photography, and setting the control exposure value (Ev) from the photometric value (BVAM) in the photometric range (LM4) to Ev = B
VAM + Av _o + obtained by Sv-1 + △ Ev (# 2115). here,
The reason why 1 is subtracted is to make the background over 1 EV to make it look backlit. It is to be noted that the main subject is about to be properly exposed by the flash from the electronic flash device. Then, the process proceeds to a subroutine (# 2120) of the program I for determining the aperture value (Av) and the shutter speed (Tv), and returns. This is shown in FIG. 23 (b), and the shutter speed control value (Tvc) is set to Tv = 7 (SS = 1/125) for tuning, and the aperture value (Av) is changed from the exposure value (Ev) to 7 ( Shutter speed) is subtracted, and it is determined whether or not the aperture value (Av) is greater than 7 (F = 11).
And return (# 2215). Aperture value (Av) is 7
If the aperture value is less than or equal to the open aperture value (Av)
v ₀ ) is determined, and if it is smaller, the open aperture value (Av _o ) is used as the control aperture value (Avc).
The calculation value (Av) is returned as the control aperture value (Avc) (# 2220 to # 2230).

Returning to FIG. 23 (a), in step (# 2105)
If the electronic flash device (FL) is not ready to emit light,
And terminals (FLOK) to the "L" level (# 2125), so as to obtain correct exposure of the main subject, calculated by _{Ev = Bvsp + Av o + Sv} + △ Ev control exposure value (Ev) from the photometric range of spot values (BVSP), etc. (# 2130), aperture value (Av), shutter speed (Tv)
Goes to the subroutine (# 2135) of the program II for determining

FIG. 23 (c) illustrates this. First, in step (# 2250), the aperture value (Av) is obtained from Av = 5 / 8Ev−25 / 8, and this aperture value (Av) is the maximum aperture value of the lens. (Av _max )
It is determined whether or not it is greater than (# 2255). If it is greater, the maximum aperture value (Av _max ) is set as the control aperture value (Avc) (# 22).
60), and proceed to step (# 2280). Step (# 2255)
When the aperture value (Av) is equal to or less than the maximum diaphragm value (Av _max) in the aperture value (Av) is determined whether the open aperture value (Av _o) less than or in the smaller open aperture value (Av _o ) Is used as the control aperture value (Avc), and if not, the calculated aperture value (Av) is used as the control aperture value (Avc) and the process proceeds to step (# 2280) (# 2265 to # 2275).

In step (# 2280), the shutter speed (Tv) is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev). In the next step (# 2285), this is larger than the maximum shutter speed (Tv _max ). The control shutter speed (Tvc) is limited to (Tv _max ) if it is higher (# 2290), and if not, the step (# 2292)
Determines whether the shutter speed is slower than the slowest shutter speed (Tv _min ). If it is slower, (Tv _min ) is used as the control shutter speed (# 2293). If not, the calculated shutter speed (Tv) is controlled. As shutter speed (Tvc) (# 229
5), return.

Returning to FIG. 23 (a), in step (# 2100),
When the difference between BVAM and Bvsp is less than 2, it is determined that the light is not in a backlight state, and the process proceeds to step (# 2145), and the light metering range (LM1) to (LM4) is determined.
From the average photometric value (Bv1 + Bv2 + Bv3 + Bv4) / 4 to the exposure value (E
v) is determined, and it is detected whether or not the flash device is ready to emit light (# 2150).

If the flash preparation has been completed, the process proceeds to step (# 2155) to determine whether or not the flash photography auto mode automatically determines whether or not the flash photography has been performed. To determine the aperture value (Av) and shutter speed (Tv) (# 2160),
It is determined whether or not v) is less than the speed of the camera shake warning (Tv = 6, 1/60) (# 2165). When the speed is lower than the camera shake warning speed, the process proceeds to step (# 2170) to perform flash photography as a low speed, and also proceeds to step (# 2170) in step (# 2155) assuming that forced emission is performed even when the mode is not the auto mode. . Then, the aperture value (Av) and the shutter speed (Tv) at the time of flash photography are determined by the program I, and the terminal (FLOK) is set to the "H" level (# 2175) to enable flash photography.

However, in step (# 2150), when the light emission preparation is not completed, the process proceeds to step (# 2180) as shooting with the steady light and the aperture value (A
v), determine the shutter speed (Tv), set the terminal (FLOK) to "L" level (# 2185), and return. Also in step (# 2165), if the shutter speed (Tv) is 7 or more (more than the tuning speed), the same applies to step (# 218).
Go to 5) and return.

Next, a flowchart for determining the aperture value (Av) and the shutter speed (Tv) in the A mode will be described with reference to FIG. 24. First, it is determined whether or not the electronic flash device is ready for light emission. If the light emission preparation is completed, the control shutter speed (Tvc) is set to 7 (1/125), the terminal (FLOK) is set to the "H" level, and the set aperture value (Av) is set as the control aperture value (Avc). (# 2300 to # 2310 and # 2345). If the flash preparation is not completed, the exposure value (Ev) is calculated from the average photometric value.
The shutter speed (Tv) is obtained by subtracting the set aperture value from the exposure value (Ev) (# 2315, # 2320).
Then, in the next step (# 2325), it is determined whether or not the shutter speed (Tv) is higher than the maximum controllable shutter speed (Tv _max ).
In step 2330), the maximum shutter speed (Tv _max ) is set as the control shutter speed (Tvc), and the flow advances to step (# 2340). If not, it is determined in step (# 2331) whether or not the speed is lower than the minimum controllable speed (Tv _min ). If the speed is low, (Tv _min ) is controlled in step (# 2333) If the shutter speed is not lower than (Tv _min ), the calculated value (Tv) is set as the control shutter speed (Tvc) in step (# 2335) and the step (# 2340).
Proceed to. In the step (# 2340), the terminal (FLOK) is set to "L".
In the next step (# 2345), the set aperture value (Av) becomes the control aperture value (Avc).

Next, the control in the S mode will be described with reference to FIG. 25. First, in step (# 2400), the exposure value (Ev) is obtained from the average photometric value and the like, and it is determined whether the light emission preparation is completed in step (# 2400). If light emission preparation is completed in step 2405), the terminal (FLOK) is set to the “H” level (# 2410).

Next, in step (# 2415), it is determined whether or not the shutter speed (Tv) is 7 or less, and if it is 7 or less, the set shutter speed (Tv) is set as the control shutter speed (Tvc) (# 2420). If it exceeds 7, the tuning speed 7 is set as the control shutter speed (Tvc), and each step (# 2430)
Proceed to.

In step (# 2430), the aperture value (Av) is obtained by subtracting the control shutter speed (Tvc) from the obtained exposure value (Ev). Whether this aperture value (Av) is smaller than the open aperture value (Av _o ) It is determined whether or not the aperture value is smaller (# 2435). If smaller, the control aperture value (Av _o ) is set as the open aperture value (Av _o ) (# 2440), and the process returns. On the other hand, if the aperture value (Av) is not smaller than the open aperture value (Av _o ), it is determined whether or not the aperture value is larger than the maximum aperture value (Av _max ) (# 2445). Av _max ) is set as the control aperture value (Avc) (# 2450), and if not, the calculated aperture value (Av) is set as the control aperture value (Avc) (# 2455) and the routine returns.

In step (# 2405), when the light emission preparation is not completed, the set shutter speed (Tv) is set to the control shutter speed (Tvc) (# 2460), and the terminal (FLOK) is set to the "L" level (# 2465). Then, the process proceeds to step (# 2430), and the subsequent flow is executed.

Next, when the mode is the M mode (see FIG. 26), it is determined in step (# 2500) whether or not the light emission preparation is completed. The terminal (FLOK) to “H” level,
The process proceeds to step (# 2515), and returns the preset aperture value (Av) to the control aperture value (Avc), and returns the shutter speed (Tv) to the control shutter speed (Tvc) in the next step (# 2520). I do.

Referring back to FIG. 6, when the exposure calculation (# 460) is completed, the microcomputer (μC) of the camera performs the third data communication with the IC card (CD) (# 465). FIG. 5 (c) shows a flowchart of this control.
Is set to the "H" level to perform serial communication with the IC card (CD) (# 360), and inform the IC card that the IC card is on the output side (# 360). Here, wait for time (# 36
5) Perform serial communication and input data from the IC card (CD) (# 370). When this data communication is completed, the terminal (C
SCD) to the “L” level and returns.

In this flow, the data sent from the IC card (CD) differs when the IC card is a mode setting card and when the IC card is a program card. There are setting data and display control data for determining whether to perform display.
That is, control shutter speed (C · Tvc), control aperture value (C · Avc), presence / absence of flash light emission, full / non-flash light emission (Full emission), card control / Do not do, there is data. (See Table 7) After completing this card data communication (III) in FIG.
The microcomputer (μC) executes the card control flow in step (# 470). This flow shows the determination of whether or not to control the camera with an IC card (in this case, a program card) based on the input data, and the operation of the camera when performing the control. 27, the microcomputer (μC) first determines in step (# 2602) whether or not the card function is selected, and when the card function is selected (CDFNF = 1), the microcomputer (μC) determines whether the card function is selected (CDFNF = 1). Go to 2605). On the other hand, when the card function is not selected (CDFNF = 0), the step (# 2
677) to set the function bits (Fb9) and (Fb10) to 0, respectively.
Then, at (# 2680), the dimming level change amount (F △ Fv) is reset and the routine returns. When the card function is selected, it is next determined whether or not a program card is mounted.
In (b2 = 0 of H), in step (# 2610), whether or not the camera is controlled by the IC card is determined based on the data input from the IC card (CD). If it is not a program card in step (# 2605) (b2 of 20H = 1) or if the camera is not controlled by an IC card in step (# 2610), the process proceeds to step (# 2677) via step (# 2677).

If it is determined that the camera is controlled by the IC card, the control aperture value (Avc), the control shutter speed (Tvc), F
The presence / absence of ull light emission and the presence / absence of flash light emission are determined based on data input from the IC card (# 2615 to # 26)
45). Next, it is determined whether or not the mode is the flash light emission mode based on the input data (# 2650). If the mode is not the flash light emission mode, the terminal (FLOK) is set to the "L" level (# 2685), and the process proceeds to step (# 2680). When the flash mode is set, the terminal (FLOK) is set to the "H" level (# 2655), and it is detected whether or not the mode is the full light mode (# 2660). When the mode is the full light emission mode, the terminal (Full) is set to the “H” level in step (# 2665), and when the mode is not the Full L light emission mode, the terminal (Full) is set to the “L” level (# 2670). Set the dimming level value change amount (C ・ FvEv) (# 267
5), return.

In FIG. 6, when the above-described routine for controlling and controlling the camera by the IC card (# 470) is completed,
Move on to display control (# 472).

Table 9 shows the contents of data sent from the microcomputer (μC) to the display control circuit. First, the shutter speed and aperture value are set or calculated values. The display of various modes is set according to the mode set at that time. AE mode display is b
0, b1 are the currently selected mode, and b2 to b4 (display data corresponding to the change mode II) are read from the E ² PROM and set. In the card display and the data change display, data is set according to the currently set mode.

Wherein the b7 (spot / multi-point forced display) is made of a "1" when the flag (multi-point / spot display) is set, the multi-point display portion on the camera body (DISP _I) /
Using the indication that the spot mode can be changed, when each mode is forcibly selected (spot by program card, or multi-point, spot AF by switch (SQ)), multi-point / spot cannot be changed Regardless,
Multipoints or spots are displayed. When b7 = 1, the display control circuit (DISPC) displays multiple points or spots according to the signal of b6.

As the number of films, the number of films at that time is set, and the data of the display of the state at that time is also set in the patokan / velo display.

In the IC card-related mode display, “b0” in (I) is set according to the installed card, and other (I, I
For I and III), change mode data sent from the IC card is set from the E ² PROM (other than when data is set), and when data is set. The controls are set according to the sequence of the camera.

The display control circuit (DISPC) determines what to display based on the data of this control. The LED sets data when needed for display. The display control will be described with reference to FIG. 28.

First, the microcomputer (μC) determines in step (# 2700) whether or not the flag (CDFNF) indicating whether or not the card function is working is set. If the flag (CDFNF) is set, the next step ( In step (# 2710), it is determined whether or not the flag (CD1F) indicating that the vehicle has passed once through (# 2710) to (# 2720) is set. Where the flag (CD1
If F) is not set, set it in step (# 2715) to display the function added by the card for a certain period of time when the card function changes from not working to working. Flag (DISPIF)
Is set in step (# 2720), and step (# 272
Proceed to 5). When the card function is not working (CDFNF =
In step (0), a flag indicating that the step (# 2710) to (# 2720) has been passed once is reset in step (# 2705), and the flag (CD1F) is set to step (# 2725). If no, the process proceeds from step (# 2710) to step (# 2725) without doing anything.

In step (# 2725), it is determined whether or not the flag (DISPIF) is set. If the flag is set, it is determined in step (# 2727) whether or not the card type is a program card. If the card is "PRO", indicate that the card is working "CAR"
Step mode data showing "D" display (# 2728)
Create with. The display in this case is as shown in FIG. 35 (a). Specifically, display registers (RAM)
B5 and b6 of the address (OAH) are “1,0” and b1 to b4 are “0”. This enables the display control circuit (DISPC)
Reads this data and displays it on the display unit.

If it is not a program card, that is, if a mode setting card or a card is not loaded, step (# 272)
9) The function by the card set in the camera in 3
4 To perform display data as shown in FIGS.
AH b5, b6 = 1, 1, b1 to b4 = 0. Note that the display data and the display contents change according to the set contents.

If the flag (DISPIF) is not set in step (# 2725), it is determined in the next step (# 2730) whether or not display control using a card is to be performed. Is OAH b5, b6 = to display data according to the mode setting data input from the IC card
0, b1 to b4 = 0 are set (# 2735).

When there is no card display control signal from the IC card in step (# 2730), the process proceeds to step (# 2736), and determines whether the write flag of the E ² PROM (WRTF) is set. When the write flag (WRTF) is set, that is, when the data setting mode using the card is ended, the process proceeds to the mode setting subroutine (# 2737) to set the mode. Further, the process proceeds to step (# 2740) to set b5, b6 = 0, 1, b1 to b4 = 0 in the display register OAH to perform a normal display as shown in FIG. 2 (u). When the card function is not working (CDFNF = 0), data with the address OAH b0 = 0 is created to delete the display of "card".

In each of the steps (# 2728), (# 2729), (# 2735) and (# 2740), the display of the infinder is indicated. The presence / absence of display is a flag (LCONF) indicating that focus detection is not possible, the presence / absence of display indicating continuous or following is a flag (following F) indicating following mode, or continuous AF.
(Fb8), multi-point ranging / spot ranging indicates a bit (Fb2) indicating a function, and S10N, OFF indicates a flag (S10N) indicating S10, OFF.
According to F), b0 to b5 of the address OCH are set respectively.

In the display control circuit (DISPC), the switch (S1) is set to O
When a signal (S10FF) indicating FF is received, (b0 to b
Turn off the display of the infinder regardless of the signal of 4).

Step (# 2728) (# 2729) (# 2735) (# 2740)
In all cases, the process proceeds to step (# 2745), and the terminal (CSD) is used to perform data communication with the display control circuit (DISPC).
ISP) to “H” level, and then step (# 2750)
To perform serial communication (camera output side), and after completion of communication, set the terminal (CSDISP) to "L" level (# 2755).

Next, when the card function is activated, it is determined in step (# 2760) whether or not a flag (DISPIF) indicating display for a certain period of time is set.
Wait for a second (# 2765). At this time, the display is performed.

Next, the flag (DISPIF) is reset in step (# 2770), and the flow advances to step (# 2780). The step (#
If the flag (DISPIF) is not set in (2760), the process skips steps (# 2765) and (# 2770) and proceeds to step (# 2780). In step (# 2780), it is determined in step (# 2780) whether or not the control shutter speed (Tvc) is less than 6 (1/60). If it is less than 6, a mode for performing a buzzer warning is selected. It is determined whether or not there is (# 2785). When selected (MSb9 to MSb12 = 0H, 2H, 4
H, 6H, 8H, AH, CH, and EH) output a pulse of a predetermined frequency from the terminal (OBZ) for a predetermined time to issue a warning by a buzzer (# 2790), and proceed to step (# 2792).

When the control shutter speed (Tvc) is 6 or more, or when the buzzer warning is not performed (MSb9 to MSb12 = 1H, 3
(H, 5H, 7H, 9H, BH, DH, FH), the process proceeds to step (# 2792) without issuing a buzzer warning.

In step (# 2792), it determines a flag (WRTF) indicating whether writing function of the camera shown data of the input mode is set to MSb0~MSb12 the E ² PROM, if it is set, step (# the mode setting data in 2794), i.e., b0 to b2 of b1~b4 address 23H address 22H, B4 to B7 of b0 to b2 of b0~b6 address 26H of the address 24H of the E ² PROM (MSb0~MSb3, MSb5 ~ MSb12, MSb26 ~ MSb34)
Is written to the bit corresponding to the content of the data, and the flag (WRTF) is reset in step (# 2796) and the routine returns. If the flag (WRTF) is not set in step (# 2792), the process returns.

The mode setting subroutine (# 2737) will be described with reference to FIG. 30. Here, it is determined whether the mode currently set in the camera is the newly set mode. Moves to another set mode. For example, if the exposure A mode is currently selected, but the A mode has been excluded from the selection of the exposure mode by the IC card, the A mode display and control as before may not be performed. Has been prevented.

Now, in the flow of FIG. 30, the microcomputer (μC)
First sets the flag (CHGF) which is reset when there is a change possible mode (# 3200), the data of either the E ² PROM settable exposure mode has been changed (MSb6～MSb8)
Data input from IC card (CD) (b0 of address 23H
And (b) are compared (# 3203), and if they are different (that is, if there is a change), the data (Fb0, Fb1) is changed to (0) to force the exposure mode to the P mode. , 0) (# 3205), and proceeds to step (# 3210).

Next, it is determined in step (# 3210) whether or not there is an H / S mode. If there is (H1 = b1 = 1 of the address 22H), the flag (CHGF) is reset, and change data (CHGF) indicating the change position is set. CDb0 to CDb2) are changed to H / S (0,0,0) and the process proceeds to step (# 3230) (# 3220, # 3225).

If there is no H / S mode (b1 = 0 of address 22H), the data (Fb6, Fb7) is set to (0, 0) without H / S (# 321).
5), and proceed to step (# 3230).

In step (# 3230), it is determined whether or not there is a +/- mode. If so (b2 = 1 of the address 22H), it is determined whether or not the flag (CHGF) is set in step (# 324).
The flag is reset (# 3250) if it is set in step 5), and the change data (CDb0 to CDb1) is set to +/- change (001) in step (# 3255) in step (# 3260). Proceed to.

If the flag (CHGF) is not set in step (# 3245), the process directly skips steps (# 3250) and (# 3255) and directly proceeds to step (# 3260).

In step (# 3230), if there is no +/- mode (b2 = 0 at address 22H), no correction is performed, the function data (Fb4, Fb5) is set to (0, 0), and the correction exposure amount ΔEv = 0 is set. Proceed to step (# 3260) (# 3235, # 3240).

In step (# 3260), it is determined whether or not the S / C mode exists. If so (b3 = 1 of address 22H), it is determined in step (# 327) whether the flag (CHGF) is set.
0), and if it is set, it is reset (# 3275).
In (0), the change data (CDb0 to CDb2) is set to (0, 1, 0), and the process proceeds to the next step (# 3285).

When the flag (CHGF) is not set, the process skips steps (# 3275) and (# 3280) and directly proceeds to step (# 3285). In step (# 3260), if there is no S / C mode (b3 = 0 of address 22H), in step (# 3265), the function data (Fb3)
Is set to (0), and the routine proceeds to step (# 3285). In step (# 3285), it is determined whether or not the S / A mode exists. If there is (S4 = b4 = 1 of the address 22H), the process proceeds to step (# 329).
In 5), it is determined whether or not the flag (CHGF) is set. If the flag is set, the flag (CHGF) is reset (# 3300), and the S / A is changed in the next step (# 3305). And returns the change data (CDb0 to CDb2) as (0,1,1). In the previous step (# 3295), the flag (CHG
When F) is not set, there is no changeable mode (# 3310), and the change data (CDb0 to CDb2) is changed to (1,0,
Return as 0).

If there is no S / A mode at step (# 3285) (b4 = 0 at address 22H), the function data (Fb) is set to multipoint ranging mode (A mode) at step (# 3290).
2) Set (0) and return.

After finishing the display control (# 472) described above with reference to FIG. 6, the microcomputer (μC) proceeds to step (# 473), determines whether or not the release switch (S2) is ON, and turns ON. If not (IP7 = “H”), interrupt is permitted and the process returns (# 474). If the switch is ON (IP7 = “L”), it is determined in step (# 475) whether the self mode is set or not, based on whether the self mode selection switch (SSELF) is ON. If the switch is ON (IP12 = “L”), the process proceeds to step (# 478) to perform the self-photographing process. This subroutine is shown in FIG.

First, the microcomputer (μC) performs AF in step (# 4500).
(This is to prohibit the AF operation because the subject may not be present during self-photographing and the background may be in focus). Next, a signal indicating the timer time for self is read from the internal E ² PROM (# 450
Five). Subsequently, in step (# 4510), it is determined whether or not 2S is selected. When 2S is selected (MSb30,
In step (31 = 0,0), the process returns after waiting for 2 seconds in step (# 4515), and proceeds to step (# 490) in FIG. 6 to perform exposure control (# 495).

Similarly, 5 seconds is selected when 5S is selected, and 10 seconds is selected when 10S is selected.
The process proceeds to step (# 490) in FIG. 6 to perform exposure control (# 4520 to # 4530).

If the self mode is not set in step (# 475) in FIG. 6 (IP12 = “H”), the flow advances to step (# 480).
In this step (# 480), it is determined whether or not the camera is in the manual focus mode [MFF = 1 (manual focus adjustment with focus lock or focus detection only)]. Through (# 495) to perform exposure control. If not in the manual focus mode (A mode), step (# 48)
Proceed to 5).

In step (# 485), it is determined whether or not a flag (AFEF) indicating in-focus is set. If not, the process returns without performing exposure control.

When the flag (AFEF) is set or AF
When not in mode (that is, in manual mode),
In step (# 490), interrupt to this flow is prohibited.
After performing the exposure control in the next step (# 495) (described later), the film is wound one frame (also described later) in a step (# 500), and it is determined whether or not the release switch (S2) is ON. It is determined in step (# 505), and when ON (IP7 =
"L"), and determines whether the mode is the continuous shooting mode (# 51).
0), and when the continuous shooting mode is set (Fb3 = 1), all interrupts are permitted in step (# 515) and the routine proceeds to [SO]. When the continuous shooting mode is not set (Fb3 = 0), the process returns to step (# 505), and waits for the release switch (S2) to be turned off. When the release switch (S2) is turned off, all interrupts are permitted in step (# 520) and the process returns.

Next, the exposure control subroutine of the above step (# 495) will be described with reference to FIG. First, in step (# 2800), based on the data input from the flash device (ST),
It is determined whether or not charging has been completed. If charging has been completed, the terminal (CSST) is set to the “H” level for (t2) in step (# 2805), indicating that the exposure mode is set. Then, as the light control amount, the film sensitivity (Sv), the exposure correction amount (△ Ev), the flash light emission amount correction amount from the IC card (F △ Ev)
Is calculated, D / A converted as analog data to a dimming circuit (STC), and output (# 2810).

In the next step (# 2815), aperture control is performed based on the control aperture value (Avc), mirror up control is performed (# 2820), and then control of the shutter speed is performed based on the control shutter speed (Tvc). Then, the Full light emission signal terminal is set to “L” level (# 2830), and the process returns.

Here, the operation of the interface circuit at the time of flash emission will be described with reference to FIG. 9 (b). At the time of flash photography, the terminal (FLOK) is at "H" level, and when the front curtain of the shutter has completed traveling, the X contact Turns ON and the AND circuit (AND2
The light emission start signal is output from 1) to the electronic flash device (ST), and the electronic flash device (ST) inputs this and starts light emission. When not in the full flash mode, the inverter (IN
"H" level is output to the AND circuit via 21), and when a pulse signal indicating the completion of dimming is input from the dimming circuit (STC), the AND circuit (AND22) outputs this to the OR circuit (OR21). Is output to the flash device via. In the electronic flash device (ST), this is input to stop the flash light emission. Full
In the light emission mode, the “L” level is input to the AND circuit (AND22), and the AND circuit (AND22) is in an inactive state, prohibiting the passage of the dimming signal.
No signal indicating stop of flash emission is output to the electronic flash device (ST).

FIGS. 32 (a) and (b) show the steps (#) in FIG.
A flowchart for controlling the winding of one frame of the film shown in FIG. 500) is shown. To explain this, 32nd
In FIG. 9A, the microcomputer (.mu.C) outputs a motor winding signal to the motor control circuit (MD) and reset-starts the timer (T3) (# 2850, # 2855). This timer is used to detect that the film has been wound up to the last frame and that the film has been pulled. The microcomputer (μC) determines in step (# 2860) whether or not the switch (SWD) indicating that one frame has been wound has been turned on. If not, the microcomputer (μC) determines whether or not 2 seconds have elapsed in this state. # 2865), and after 2 seconds,
The motor is controlled to stop (# 2870), and assuming that the film is tight, the control of the film is performed (# 2875), and the routine returns. Referring to FIG. 32 (b), the tension subroutine will be described. In step (# 2920), it is determined whether or not auto return (automatically rewinds the film after tension) is selected. (MSb9 ~ MSb12 = 0H ~ 3H, 8H ~ BH, where H
Is a hexadecimal number), the motor reverse signal is given to the motor control circuit (MD), and the film detection switch (SFLM) is turned on.
Wait for # 2930, # 2935. Next, switch (SF
When LM) is turned off, it is determined whether or not the entire film is to be rolled into the patrone room. When the film is rolled (MSb9 of E ² PROM)
If MSb12 = 2H, 3H, 6H, 7H, AH, BH, EH, FH, wait for 1 second (# 2945), perform motor stop control (# 2955), and return.

If not involved (MSb9 to MSb12 of E ² PROM = 0H,
(1H, 4H, 5H, 8H, 9H, CH, DH), wait 0.2 seconds, stop the motor, and return (# 2950).

If it is not an auto return in the above step (# 2920) (MSb9 to MSb12 = 4H to 7H, CH to FH), then step (# 2925)
Wait until the rewind switch (SWD) is turned on,
If it is turned on, the process proceeds to the step (# 2930).

Returning to FIG. 32 (a), in step (# 2960)
When the one-frame winding completion switch (SWD) is turned on, the motor is stopped in step (# 2880), and then in the next step (# 2885), it is determined whether or not the film number counter is a forward calculation type. Is determined, and if the formula is a forward calculation (MSb9 to MSb1
2 = 0H to 7H), in step (# 2890), increment the count number (N1) of the counter indicating the number of film shots by one, and in the case of an inverse formula (MSb9 to MSb12 = 8H)
To FH) is the count number (N1) indicating the number of remaining films
Is decremented by 1, and each step (# 29
Go to 00). In step (# 2900), and writes the number of film frames (N1) to MSb13~MSb18 of E ² PROM.

Next, when the back cover closed detection switch (SRC) or the rewind switch (SRW) is operated, a pulse signal is input to the terminal (INT2), and the microcomputer (μC) is turned on by the microcomputer (μC) shown in FIG. 33 [INT2]. Execute the interrupt of In the flow of FIG.
The microcomputer (μC) first prohibits interruption to this flow (# 3000), and then detects in step (# 3005) whether or not the rewind switch (SRW) is ON. If it is turned on, FIG. 32 (b)
The [rewind] routine shown in (1) is executed, the interrupt is permitted, and the routine returns (# 3010). Rewind switch (SRW)
Is not ON, the back cover closing switch (SRC)
If it is turned on, the process proceeds to step (# 3015) to determine whether or not a film is present. If there is no film, that is, if the film detection switch (SFLM) is OFF, the process proceeds to step (# 3100) without performing initial loading.
On the other hand, if the film exists (that is, SFLM is ON
), The terminal (CSDX) is set to the “H” level, serial communication is performed with the film sensitivity reading circuit (DX), and the film sensitivity data (Sv) and the number of film shots (N) are input, and the communication is completed. And the terminal (CSDX) to the “L” level (# 3020 to # 3030). Then, the number (N1) is set to -2 (# 3035), the terminal (CSDISP) is set to "H" level, and serial communication is performed with the display control circuit (# 3045).
Signal indicating initial load (b1 of 0AH = 1, b2 to b6 =
0) and the data of the number of films are output.
The data other than the data indicating the number of films (N1) is not displayed. When the serial communication is completed, the terminal (CSDISP) is set to the “L” level (# 3050). This film number (N
For the numerical value of 1), the display is displayed using two 7 segments. Next, the microcomputer (μC) outputs a signal indicating winding of the motor to the winding control circuit (# 3055), waits for one frame to be wound (# 3060), and turns on the one-frame winding switch (SWD). (1) is added to (N1), and it is determined whether or not it is 1. If it is not 1, the process returns to step (# 3040). If it is 1,
Proceeds to step (# 3075) to stop the motor, and further checks whether the film counter is of the forward formula.
3080), and if it is a forward calculation formula, the step (# 308
In step (5), if (N1) is 1 and it is not a forward formula, step (# 309)
The number of film shots (N) read in (0) is set to (N1), and the flow advances to step (# 3095). And the step (#
In step 3095), the number of films (N1) and the film sensitivity are written to predetermined addresses of the E ² PROM, and after the writing is completed, all interrupts are permitted (# 3100) and the process returns.

Here, in this embodiment, it is added that the setting and resetting of the flag and the bits 1 and 0 are the same.

In the above, the microcomputer (μ
The operation C) has been described with reference to various flowcharts and the like. Next, control of an IC card mounted on the camera will be described with reference to flowcharts. The mode setting card and the program card will be described separately. The IC card (CD) incorporates a microcomputer (μC2) with a built-in E ² PROM.

First, from the mode setting card, the IC card (C
When D) is mounted on the camera, power is supplied and, as described above, the microcomputer (μC) of the camera is interrupted and a clock (φ) is sent to the microcomputer (μC2) on the IC card side. Becomes drivable.

On the IC card side, a signal that changes from “L” to “H” level is input to the terminal (RE) by being attached to the camera, and the microcomputer (μC2) executes the flow shown in FIG. 40 (a). In the figure, the microcomputer (μC2) first resets the flag output port, transfers the data of the E ² PROM to the bit corresponding to the data content of the RAM bits (# CD10), and waits for an interrupt (# CD15).

When a signal (CSBCK) indicating a data communication request is sent from the camera, the microcomputer (μC2) of the IC card interrupts [INC
T], and this is shown in FIG. 40 (b). The microcomputer (μC2) controls in step (# CD50) to perform serial communication with the camera, and the data communication transmitted from the camera is performed. Based on the clock (SCK), the data from the camera is input and the data communication (I, II, II
I) is determined (# CD55). In case of data communication I, first, what kind of IC card (mode setting,
Or a program) to set the data indicating to the camera (mode setting card in this case), output the data based on the clock (SCK) sent from the camera (# CD60), and wait for an interrupt (# CD63). If the data communication is II, go from step (# CD70) to step (#
Proceed to CD75) and input data (key data in this case) sent from the camera in synchronization with the clock (SCK). Based on the input data, a data set routine (# CD75) is performed, and an interrupt is awaited (#CD
63).

The routine of this data set is shown in FIG. 40 (c). In step (# CDR100), it is determined whether or not the card data setting switch (SCDS is turned on). (# CD110, # CD1
After performing each control in step (05), step (# CD11
Proceed to 5). The control flow of [SCDSON] [SCDSOFF]
As shown in FIGS. 40 (e) and (f), this control is performed in FIGS.
Compared to the flow of [SCDSON] and [SCDSOFF] shown in the figure, there is no step (# 1500) and step (# 1550) for determining the mode setting card (this is unnecessary on the card side). Are the same and will not be described.

The reason why a C is added at the head of the flag is to distinguish it from the flag on the camera side, and its function is the same as the function of the flag on the camera side without C.

Returning to FIG. 40 (c), in step (# CD115), it is determined whether or not the set flag (CSETF) has been set. If not, the flow of [SCDSON] is performed once and [SCDSOFF] is performed. It is determined in step (# CD120) whether or not the flag (CCDSF) that has been set when the flow does not pass through is set.

In this embodiment, the card data setting switch (SCDS)
Is set to OFF to enter the change mode. If the flag (CSETF) is not set in step (# CD115), it means that the setting has not been changed yet, but has changed as such.

If the flag (CCDSF) is set, the display control flag (DISPCF) is set (# CD125). If the flag (CCDSF) is not set, the display control flag (DISCDF) is reset (# CD130) and the routine returns.

By setting and resetting the display control flag (DISPCF), it is determined whether or not the display on the camera side is to be the display in the data setting mode (step (# 2730) in FIG. 28). When the flag (CSETF) is set in the step (# CD115), the flow of the data set I for changing the data is executed, and the process proceeds to the step (# CD125) (# CD117).

Here, a flow according to the operation of the data set I will be described.

In FIG. 40 (d), it is determined whether or not the card switch (SCD) is turned on (# CD135). If it is turned on, the bits (CCkb1 to CCk) storing the change mode are determined.
From b2), the current change mode is determined, the mode is changed to the next mode, and the process returns (# CD140). At this time, the data of the bits (CCkb15 to CCkb17) is also changed. When the switch (SCD) is not turned on, it is determined whether the up switch or the down switch is turned on (#CD
145, # CD155), and when these switches are ON, the flow of the data sets II, III is executed and the program returns (# CD150, # CD160). If neither is turned on, return without doing anything.

Next, the data set II is shown in FIG. 40 (g) and will be described. First, the microcomputer (μC) sets the change mode from (I) to (I).
(VII) is determined, and the bit (CCkb3 to CCk) storing the number that determines the function in that mode
From b22), determine the current number and change to the next number. For example, in mode I, the current number is “0” (H /
S, exposure compensation, drive mode S / C, spot AF / multi-point AF
Becomes "1" (out of the four, the spot / multipoint AF cannot be changed). data set
III is almost the same as the above-mentioned data set II, and is different from the above-mentioned data set II only in that the progress of the numbers is reversed.

Next, the case of a program card will be described. In the present embodiment, the program card is an effective sports program when it is desired to take a scene of playing sports.

Now, when the IC card is inserted into the camera, a signal that changes from the "L" level to the "H" level is input to the RESET terminal of the microcomputer (μC2) on the card side. The flow of [Reset] shown in the figure is executed, and the flag and the port are reset in step (Q1) to wait for an interrupt (Q2). When the CSBCK signal is input from the camera, an interrupt occurs and the [INT] flow shown in FIG. 42 is executed. The microcomputer of the IC card (μC2) performs data communication based on the clock (SCK) sent from the camera (Q50). The data at this time is data for the camera to inform the card side of the kind of communication,
The microcomputer of the IC card (μC2) inputs the data and determines the contents of the communication (Q51). In the case of data communication I, serial communication data indicating the card type (here, it is a program card), data indicating that the AF mode is continuity, and that the photometry zone is multipoint are transmitted to the camera side. Output at (Q52), go to step (Q56) and wait for interrupt.

Here, this program card is intended for sports scenes, so continuous AF, which is always in focus to respond to fast-moving subjects, also has a wide range of light metering zones for the same reason Since the focusing zone focuses on a moving subject, it is desirable to have a wide range of points. However, switching is possible in consideration of a case where the photographer wants to focus sharply on the main subject only.

In the case of data communication II, data necessary for exposure calculation is input from the camera (steps Q53 and Q54). Then, exposure calculation is performed and an interrupt is waited (Q55).

Next, before describing a specific example of a flowchart of the exposure calculation, an outline of control of the card will be described.

<< Cards for outdoor sports and athletic meet >> [Contents] You can shoot a moving subject with a high-speed shutter that does not shake in a relatively bright place.

〔control〕

The control contents of the outdoor sports and athletic meet card are shown in the program diagram of FIG. This control is performed as follows.

(A) The aperture value Av of the lens is calculated by the following equation.

When Ev <21, Av = (3/4) · Ev−23 / 4 When Ev ≧ 21, Av = (1/2) · Ev−1 / 2 That is, when Ev <21, the shutter speed (Tv Open the aperture slightly to speed up the operation. Therefore, Av = (3/4) E
Calculate v−23 / 4.

When Ev ≧ 21, the shutter speed (Tv) is considered to be already sufficiently high, so that both (Av) and (Tv) change smoothly, so that Av = (1/2) · Ev−1 Calculate / 2.

Then, a comparison is made of the open aperture value Av _o and Av. The calculated value is Av _o
If less than is corrected to Av _o can not set the aperture value to its value.

 Next, a shutter speed (Tv) is obtained by the following equation.

When Av ≧ Av _o , Tv = Ev−Av When Av <Av _o , Tv = Ev−Av _o (b) When the film is a negative film, the shutter speed (Tv) is increased to increase the shutter speed (Tv). ) Is corrected.

Negative film has a wide latitude, so use it to lower the exposure by about 1 Ev to maintain a high shutter speed.

No correction is made for reversal film (positive) because the latitude is narrow.

(C) Others The above control is performed when a lens with a focal length of 70 mm or more is mounted. The reason is that sports photography seems to have a relatively long distance to the subject, and it is considered that the subject cannot be sufficiently photographed without a telephoto lens, and when the telephoto lens is not used, the image magnification of the subject becomes small. The control is not performed because the probability of causing a camera shake by moving the lens to follow the subject is small.

In this control, the flash is turned off, and the flash is not automatically fired. The reason is that this program card is intended for shooting in relatively bright places,
This is because, since it is considered that the distance to the subject is relatively large, activating the flash does not seem to have much effect.

In this control, if the flash switch is forcibly turned on, no control is performed. The reason is that, in this control, the flash is not emitted for the above-described reason, and therefore, if the control is performed at the time of the forced ON, it is against the photographer's will to make the flash emit.

Next, a flowchart of the exposure calculation of the program card is shown in FIG. 43 and will be described. In the figure, the microcomputer of the program card first determines the presence or absence of a lens from the data input in the step. Here, when the lens is not attached to the camera body, lens data such as the open aperture value (Av ₀ ) does not come to the IC card. Accordingly, since the exposure calculation cannot be performed, the process proceeds to step and the exposure control is left to the camera body. If a lens is mounted, the operation proceeds to a switch to check the focal length of the lens from the input data. For a lens having a focal length of less than 70 mm, the card is not controlled for the above-described reason. In this case as well, the procedure jumps to the step and the exposure control is left to the camera body. If the focal length is 70 mm or more, the state of the flash forced light switch is checked from the data input in the step. If the forced light emission switch of the flash is ON, the card jumps to the step because the card does not control for the above-mentioned reason.

On the other hand, when the switch is OFF, the exposure value (Ev) is calculated based on the sum of the spot luminance (Bvs) and the film sensitivity (Sv) of the data input in the next step. Then, the content of the control is changed according to the value of the exposure value (Ev).
For the above reason, when Ev <21, Av = (3/4) · Ev−2
(Av) is obtained in steps from the formula of 3/4. When Ev ≧ 21, (Av) is obtained in steps from the equation Av = (1/2) · Ev−1 / 2.

In the next step, the comparison between (Av) calculated in the step and the minimum aperture value (Av _max ) of the lens is performed. And A
When v ≧ Av _max , the lens cannot be further stopped down.
_max .

On the other hand, when Av <Av _max , Avc = Av in the step. After the body control aperture value Avc is obtained in this manner, the shutter speed (Tv) is set to Tv = Ev−Avc in steps.
Calculate based on the formula.

In the next step, the shutter speed (Tv) is compared with the maximum shutter speed (Tv _max ) of the camera.
Here, when Tv ≧ Tv _max , the process proceeds to step and the body control shutter speed (Tvc) is set to (Tv _max ). Tv
When <Tv _max , Tvc = Tv in the step.

If Ev <21 in the above step, (Av) is calculated by the formula shown in the step, and then the process proceeds to the step. In the step, (Av) calculated in the step is compared with the open aperture Av ₀ . Here, when Av> Av ₀ , (Av) and (Av)
Go to the above step to make a comparison with v _max ). Av ≦
At the time of Av ₀ , since the aperture value of the lens cannot be further opened, the process proceeds to step and the body control aperture value (Avc) is set to (Av ₀ ). Then, in a further step, Tv = Ev−A
Calculate the shutter speed (Tv) from the equation of vc.

For the reasons described above, when the film is a negative film, the shutter speed (Tv) must be corrected, so that the type of the film is determined in the step. As a result, in the case of a reversal (positive) film, the process proceeds to steps 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 and it is determined whether or not the shutter speed (Tv) is smaller than 9. When Tv ≧ 9, the body control shutter speed (Tvc) is set to (Tv) in step. If Tv <9, the process proceeds to step and it is further determined whether or not the shutter speed (Tv) is 8 or more.

Here, when Tv ≧ 8, Tvc = 9 (step), and when Tv <8, the correction Tv = Tv + 1 is performed in the step, and the process proceeds to the next step. In the step, to prevent the shutter speed (Tv) from becoming extremely slow (T
A comparison is made to limit the maximum value of v) to Tv = -5 (30 seconds).

Here, when Tv <−5, Tvc = −5 (step), and when Tv ≧ −5, Tvc = Tv (step).

Since the flash control is not performed for the above-described reason, a bit for turning off the flash is set in the step.
Thereafter, the process proceeds to the step where the camera control uses the value calculated by the program card and returns.

Upon completion of the exposure calculation flow, the flow returns to the flow of FIG. 42 and waits for an interrupt.

Here, there is an interruption from the camera side. At this time, if the data communication is III, the calculated aperture value (CAvc), the shutter speed (CTvc) data and whether or not to perform camera control with the card, full light emission non-forced (Fb9 = 0), prohibition of forced light emission (Fb10 = 0), and resetting data for both flash control (CF △ Ev), perform serial communication, and output to the camera. The microcomputer (μC2) of the card is stopped for communications other than the above.

Here, the switches, their functions, various data, and the like appearing in the description of the present embodiment are shown in Tables 1 to 12 below.

In the present embodiment, as shown in steps (# 4000) and (# 4005) in FIG. 6A, when the lens switch (SQ) is operated while the power is being held, the power is kept extended. Also, as shown in steps (# 427) and (# 431) of FIG. 6, this lens switch (SQ)
Is operated when the switch (S1) is not pressed, the lens driving is stopped and any operation related to focusing is stopped. Thus, the operations required for photometry and display are extended and continued for a predetermined period of time (while the power is kept), but unnecessary focusing operation using power is not performed.

Incidentally, the correspondence between each constituent requirement in the claims and the embodiment is as follows. First, the function execution operation means described in the claims corresponds to a shutter release button and switches S0, S1, etc. associated therewith. The function continuation means corresponds to a part of the microcomputer μC that executes the operations of steps # 10 to # 40 of the flowchart. The lens driving stop operation means corresponds to the lens switch SQ.
The control means corresponds to the part of the microcomputer μC that executes the operations of steps # 4000 to # 4005 and the operations of steps # 10 to # 40 in the flowchart.

Effect of the Invention In the present invention, a switch (S1
Switch) is no longer operated, and even when the remaining time for power holding is short, the power holding time is extended by operating the switch (SQ switch) related to lens drive stop. Therefore, the next photographing operation can be performed with a margin. Also, this SQ switch is originally A
This is a switch related to the F control, but if the switch for starting the AF (S1 switch) is not operated, even if only this switch is operated, the operation related to the AF is not performed. Therefore, no useless operation is performed and power is saved.

[Brief description of the drawings]

The drawings relate to an embodiment of the present invention. FIG. 1 is a circuit block diagram of the entire camera, FIGS. 2 (a) to 2 (v) are diagrams showing display forms on a display unit thereof, FIG. 3 is a flowchart showing a routine for resetting the camera when a battery is installed. FIG. 4 is a flowchart showing a routine of the initial setting in FIG. FIG. 5 (a) to FIG. 5 (c) show the camera and the camera attached thereto.
5 is a flowchart of data communication performed by an IC card. FIG. 6 is a flowchart showing a routine for performing photometry / AF / display / exposure control, etc. FIG. 6 (a) is a partial detailed view thereof, FIG. 7 is a flowchart showing a lens data input routine therein. FIG. 8 is a flow chart of flash data input. FIG. 9 (a) is a circuit diagram of the electronic flash device, and FIG. 9 (b) is a circuit diagram of the interface. FIG. 10 (a) is a flowchart of the AF routine, and FIGS. 10 (b) to 10 (f) are detailed diagrams thereof. FIG. 11 is a diagram showing a distance measurement range and a photometry range in a photographing screen. FIG. 12 is a flowchart showing a key setting routine provided for the camera,
FIG. 13, FIG. 14 (a), FIG. 14 (b), FIG. 15, FIG.
FIG. 17, FIG. 17, and FIG. 18 are flowcharts showing specific setting routines for the various keys. FIG. 19 is a flowchart showing a routine for creating photometric data, and FIG. 20 is a flowchart of AE lock. FIG. 21 (a), FIG.
FIG. 21B is a flowchart for setting the aperture and shutter speed. FIG. 22 is a flowchart of the exposure calculation, and FIGS. 23 (a) to 23 (c), FIGS. 24, 25 and 26 are flowcharts of each mode therein. No.
FIG. 27 is a flowchart of control using an IC card (particularly a program card). FIG. 28 is a flowchart showing a display routine, and FIG. 29 is a flowchart showing a self-routine. FIG. 30 is a flowchart for mode setting, FIG. 31 is a flowchart for exposure control, FIGS. 32 (a) and 32 (b) are flowcharts for winding one frame of film, and FIG. 33 is an interrupt for closing the back cover. 6 is a flowchart showing a routine of FIG. Fig. 34 (a)
34 (e), 35 (a), and 35 (b) are views showing display examples. FIG. 36 is a circuit diagram inside the lens, and FIG. 37 is an external view of the lens. FIG. 38 is a display example of the infinder, and FIG. 39 is a display example of the body display.
FIGS. 40 (a) to 40 (h) are flow charts showing various routines for the IC card. FIGS. 41 and 42 are flow charts particularly for a program card.
FIG. 43 is a flowchart of the exposure calculation, and FIG. 44 is a program diagram relating to the program card. FIG. 45 is a diagram corresponding to the claims of the present application. (ΜC): Camera microcomputer (μC2): IC card microcomputer (CD): IC card (SQ): Lens switch (10): Lens (S1): AF start switch.

Continuation of the front page (72) Katsumi Kosakai 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Prefecture Osaka International Building Minolta Camera Co., Ltd. (72) Hiroshi Otsuka 2-chome Azuchicho, Chuo-ku, Osaka-shi, Osaka No. 3-13 Osaka International Building Minolta Camera Co., Ltd.

Claims (2)

(57) [Claims] 1. Photometric means for measuring subject brightness; focus control means for controlling focusing; display means for displaying control information of the camera system; and camera system functions including photometry, focus control and display. Function execution operation means for bringing the operation state into operation, function continuation means for operating a function excluding focus control among the functions for a predetermined time after the function execution operation means is no longer operated, and function execution operation means When the lens drive stop operation means for stopping the lens drive by the focus control means while the function control means is operated, and when the lens drive stop operation means is operated while the function continuation means is operating, Control means for activating the function except for the focus control while the operation is being performed, and activating the function continuation means when the operation is stopped. And a camera system. 2. The system according to claim 1, wherein said lens driving stop operation means is a switch provided on the lens side.
The camera system as described.