JPH0242429A - Camera system - Google Patents

Abstract

PURPOSE:To switch a mode with a simple operation without releasing an SI switch by operating switch provided on a lens in an automatic focusing operation where a switch provided on a shutter releasing button is operated. CONSTITUTION:The title camera system having a function which operates by two types of modes has an operation means M1 provided on the main body of the camera and an operation means M2 provided on the lens and is provided with a control means to operate the function by the mode set beforehand when the operation means M1 is operated and to operate the function by the other mode when the operation means M2 is operation further while the operation means M1 is operated. That is to say, when the operation means M2 is operated while the operation means M1 is operated, a control means M3 switches the operating mode of the function to the other mode. Thus, while an operator continues the automatic focusing operation, the operating mode can be switched in an instant.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to camera systems, and more particularly to changing the mode of operation of the camera's functions.

Recent cameras are equipped with many functions, and each function operates in various modes. An automatic focusing (AF) function that drives a lens to properly focus on a subject is already known, but various operating modes are being considered for this AF type function. For example, AF
Regarding continuity of motion, once the subject is in focus (
There is a one-shot AF mode in which lens driving is stopped after the subject is in focus, and a continuous AF mode in which the lens continues to be driven so that the subject remains in focus even after the subject is in focus. In addition, regarding which part of the field of view to target for AF focusing, there are two modes: spot AF mode, which focuses on only one point in the field of view (usually the center of the field of view), and spot AF mode, which focuses on only one point in the field of view (usually the center of the field of view), and There is a wide (or multi-point) AF mode that focuses on a wide area.

Conventionally, AF operation is entered by operating a switch provided on the shutter release button (hereinafter referred to as the S1 switch), and in that state, lens drive is stopped by further operating a switch provided on the lens. (that is, focus lock) (Utility Model Application Publication No. 58-62310). Furthermore, the above-mentioned change in AF mode had to be determined in advance using a separate switch before starting the AF operation.

When taking a picture, it is common to operate the Sl switch to start AF operation and then want to change the AP mode depending on the condition of the subject.

At this time, in the conventional method, it is necessary to once release the S1 switch, exit AF control, and switch the AF mode, which is very inconvenient.

The present invention solves these problems and provides a camera system that can switch modes with a simple operation without releasing the S1 switch even after starting AF operation.

In order to achieve the above object, in the present invention, as shown in FIG. 45, in a camera system having a function of operating in two types of modes, a first operation means M1 provided on the camera body; When the second operation means M2 provided on the lens and the first operation means M1 are operated, the above functions are activated in a predetermined mode, and when the elbow of the first operation means is operated, the second operation means is activated. It is characterized by comprising a control means for operating the function in the other mode when the operation means tag is also operated.

Note that this function may be an automatic focusing (AF) function, and the first operating means M1 may be a switch provided on the shutter release button. Also,
In this case, the two types of modes are spot AF mode and wide AF mode, or one-shot AF mode.
, continuous AF can be considered.

The operating mode (first mode or second mode) of the above-mentioned functions of the on-go camera system is determined in advance by another switch or the like. This is now the first mode. When the first operating means M1 is operated, the control means M3 activates its function in the first mode.

For example, the AF function is operated in spot AF mode.

While the first operating means M1 is being operated, the second operating means M1 is further operated.
When the operating means M2 is operated, the control means M3 switches the operating mode of its function to the other second mode. In the above example, the mode is switched to wide AF mode. This allows the operator to continue the AF operation while
Its operating mode can be switched instantly.

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

A microcomputer (hereinafter referred to as a "microcomputer") that performs various calculations has an E2PROM, and internal writing and reading can be performed freely. (AFct) is a focus detection circuit that performs focus detection, and is COD.

Consisting of an integral control circuit and an A/D conversion circuit, it obtains object information for three distance measurement areas (to be described later), performs A/D conversion on this information, and outputs it to a microcomputer (μC). (LD
I) is an auxiliary light emitting element that emits light toward a subject to enable focus detection when the brightness is low and focus cannot be detected.

(LM) is a photometry circuit that performs photometry for four areas (described later), converts the photometry values into A/D, and converts the photometry values into microcontroller (μ
C) as luminance information. (DISPC) is a display control circuit that inputs display data and display control signals from a microcomputer (μC) and causes a display section (DISP+) on the top surface of the camera body and a display section (DISP++) in the viewfinder to perform a predetermined display.

In this example, there are two types of IC cards: a mode setting card that sets the camera mode and a program card that determines exposure. Only one of these cards can be installed in the camera, and the camera will control specific modes, exposure programs, and functions. This will be explained in detail later. (ST) is an electronic flash device, (IF) is a camera microcomputer (μC)
) and an electronic flash device (ST), the (STC) receives the reflected light from the subject when the flash is fired, which has passed through the photographic lens (not shown), and fires the flash when the appropriate exposure amount is reached. This is a dimming circuit that stops light emission.

(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 the photographing lens based on focus detection information, (Tvct) is a shutter control circuit that controls the shutter based on a control signal from a microcomputer (μC), and (Avct) is a microcomputer (μC).
(MD) is a motor control circuit that controls the winding and rewinding of the film based on control signals from the microcomputer (μC). (BZ) is a buzzer that warns you when the shutter speed reaches a speed that causes camera shake. (E) is the battery that serves as the power source, (D+) is the diode for backflow prevention, (Ceu) is the microcontroller (μC)
This is a backup capacitor with a large capacity. (RR) ((J) is a microcontroller (μC) when the battery is installed.
) This is a reset resistor and capacitor for heli-setting. (Tri) is a power supply transistor that supplies power to a part of the circuit described above.

Next, to explain the switches, (SRE) is a battery installation switch that turns off when the battery is installed, and when the battery is installed and the switch (SRE) turns off, the microcontroller (μC) A signal changing from "L" level to "H" level is applied to the terminal (RE) of the microcomputer (
μC) will execute a reset routine to be described later. (SEM) is a normally open exposure mode change switch.
The exposure mode is changed by operating this switch (3EM) and operating the up switch (Sup) and down switch (Sdn), which will be described later. (SFUN) is a normally open function change switch, and the function is changed (for example, switching between continuous shooting and single shooting) by operating this switch, up switch (Sup), and down switch (Sdn). (SCD) normally switches the card function between disabled and enabled when the card is installed, and if the mode setting card is installed and the data setting mode is selected, the changed data item is selected. This is a normally open card function enable/disable switch. In addition, the up switch (Sup
), the setting value in the item can be set by operating the down switch (Sdn). (Details will be explained later).

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

(SO) is a photometry switch that is operated to perform camera operations (for example, photometry and display of various data) other than autofocus (hereinafter referred to as rAFJ) operation, and can be turned on by simply touching the release button (not shown). It consists of a touch switch. The above switch (SEM)
(S FUN) (S CD) (S CD5) (S o)
If one of the switches is turned on, the microcomputer (μC
) executes the interrupt flow of (INTI) in FIG. 3, which will be described later. (Sl) is an AF switch that starts AF operation, and when the first stroke of the release button is pressed,
It becomes N. (S2) is a release switch that is operated when performing a shooting operation, and the second stroke (S2) of the release button is
(deeper than the first stroke) turns ON. (SW
D) is a one-frame switch that is turned ON when one frame of film is wound. (SAEL) is AE flock (exposed lock)
This switch is a normally open bushing switch. (S AF/M) is a focus adjustment mode changeover switch for switching between AF and manual focus adjustment.

(SSE) is a permanently open change data selection switch for selecting data to be changed. (S5ELF) is a self-mode switch operated during self-photography. (SAv) is an aperture change switch that changes the aperture value by operating this switch and operating the up switch or down switch when the exposure mode is M mode (manual mode). When there is no operation in M mode, the shutter speed is changed by operating the up switch or down switch. (S FLM) is a film detection switch that detects whether or not film is loaded, and is placed on the film rail surface near the spool chamber, and is turned off when film is present.

(SRC) is a back cover close detection switch that turns ON when the back cover is closed and turns OFF when it is opened.When this switch is turned ON, the microcomputer (μC) executes an interrupt routine to be described later. (SRW) is a switch to start film rewinding. When operated, it turns ON, executes the interrupt routine described below, and turns ON when the back cover is opened.
FF. (SCR) is an IC card installation switch that turns off when an IC card (CD) is installed, and when turned off, resets the microcomputer (μC2) of the IC card (CD). (X) is a so-called X contact, which turns ON when the shutter completes one curtain travel, and turns OFF when a release member (not shown) is charged.

(Sup) is an up switch that changes or adds data to be changed, and (Sdn) is a down switch that also performs subtraction. When changing the aperture value in M mode, turn on the aperture change switch (SAv) and turn on the aperture change switch (SAv).
up) and (S dn) to increase the aperture value.

down, turn off the aperture change switch (S up),
(S dn) functions to increase and decrease the shutter speed, respectively. However, the aperture change switch (S Av) can be turned off by changing the function using the IC card described later.
to change the aperture, and turn on the aperture change switch (SAv) to change the shutter speed. Up switch (Sup
), the operation of the down switch (Sdn) is detected when the terminals (IP20) and (IP21) each become "L" level. In FIG. 1, a line (WI) common to each of the switches is connected to a ground potential point (GND).

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

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

(I) Mode setting card: This IC card allows the photographer to select the functions (controllable functions) of the camera that are necessary for the photographer (delete those that are deemed unnecessary), or to select an alternative function. By doing so, we aim to provide a camera that meets the photographer's intentions and photographic techniques. Additionally, unnecessary functions can be omitted, resulting in a camera that is simplified and has good operability when changing modes. Next, the explanation regarding this card and the display contents performed for it will be explained.

First, to select the functions of this IC card, (i) 4
(ii) selection of exposure mode;

(iii) Selection of A and E-related functions, (iv) Choice between two functions, and (v) Relationship based on operation of a switch on the lens side.

The four functions in (i) above are (a-1) Highlight reference/shadow reference exposure function (a-2) Exposure compensation function (a-3) Film advance mode switching function (continuous shooting/single shooting) (a-4) Spot AF/multi-point AF switching function, which allows the photographer to select the function necessary for the photographer. The display on the display section (DISP+) on the camera body regarding this selection is shown in Figure 2 (a).
Of all the display contents shown in FIG. 2(b), those shown in FIG. 2(b) are prepared. In FIG. 2(b), the functions (a-1) to (a-4) described above correspond in order from the left side. If the photographer does not require only the highlight reference/shadow reference exposure function (a-1), a display as shown in FIG. 2(C) is displayed.

For each selected function, the display regarding the use or switching of that function is as follows: Highlight criteria: Figure 2 (d) Shadow criteria: Figure 2 (e) Exposure compensation + side...
...Fig. 2 (f) Exposure compensation - side...Fig. 2 (g) Continuous shooting mode...Fig. 2 (h
)Single shooting mode......Figure 2 (i) Spot AF......Figure 2 (j) Multi-point A
F......Figure 2 (k). As an exception, in the case of multi-point/spot selection by the program or spot selection by the switch (SQ) described below, the mode set by the above two is displayed only when it is selected, even if it is not selectable. be done. Note that regarding continuous shooting/single shooting and spot AF/multi-point AF, even if one of the functions (for example, continuous shooting) cannot be switched, it is always selected. However, since switching is not possible, it is not displayed.

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

In addition, when setting, the number rQj ~ "15" shown in Table 2 (a)
In order to show that the function is provided only for the function given to
0”], Fig. 2 (C) [H/8 function only and no 1
[equivalent to number 8] will be displayed, and the up switch,
It is designed to advance one step at a time by operating the down switch.

Next, the exposure modes related to the exposure mode selection in (ii) above are (b-1) Program mode (P mode) (b-
2) Aperture priority mode (A mode) (b-3)
Manual mode (M mode) (b-4) There is a shutter priority mode (S mode), P mode is always set as a basic, and you can select a combination of the remaining three modes (A, M, S mode). There is. Therefore, there are eight combinations as shown in the table on the next page, and the four mode displays shown in Figure 2 (m) (however, P
ROGRAM is represented by P), when setting the mode, the selected combination is displayed, for example, as shown in Figure 2 (n), and when shooting, the selected exposure mode is displayed [Figure 2 (n)]. o) (A mode selection)] is performed.

Incidentally, in the P mode, PROGRAM is displayed [second country (p)].

Next, as for the selection of the AE amount related function in (iii) above,
There are the following:

(C-1) A E lock button relationship (1) While pressing the A E lock button, the power of the camera is maintained in the AE lock state (2) If you press the AE lock button once, press the AE lock button again in the AE lock state , or AE with power hold OFF
Cancel flocking state (C-2) Set shutter speed to 1/
Make it 2Ev.

This allows the set shutter speed, which normally changes only in increments of IEv, to be set in increments of 1/ZEv.

(C-3) When the exposure mode is M mode, the aperture change switch (SAv) remains OFF and the aperture value can be changed by simply operating the up switch or down switch.
Av) operation (i.e., ON) to change the shutter speed (hereinafter referred to as rM2 mode), or ■ change the shutter speed with the aperture change switch (S Av) OFF, and operate the aperture change switch (8Av) ( In other words, the mode (hereinafter referred to as rM1 mode) in which the aperture value is changed when used in combination with ON) is switched.

When setting these functions, the display will be as shown in Figure 2 (V), rF-5J will indicate this mode change, and the number "2" will select the function shown in Table 2 (e). Show what you are doing.

Next, (iv) as a choice between the two functions, (d-1) forward counting or subtraction of the film counter, (d-2) presence or absence of auto-return at the end of the film, and (d-3) rewinding. At the end, part of the film leader is rolled into the cartridge or left outside the cartridge (d-4) With or without a camera shake warning buzzer (BZ), there are 16 possible combinations, as shown in Table 2 (b). Numbers are given for the combinations shown. At the time of setting, the screen is displayed as shown in FIG. 2(q), with the last three digits of the shutter speed indicating the item to be changed, and the film counter indicating the items below that.

(V) Regarding the operation of the lens-side switch, it is related to which AF (autofocus) mode is selected when the switch provided on the lens side (described later) is operated. The modes are: - First, when the switch is not operated (AF mode selected), (E-1) One-shot AF (follow-up judgment after focus) in a multi-point/spot area (however, program mode ) ■When the switch is operated (E-2) Focus lock (E-3) Spot AF (E-4) Continuous AF It is displayed as shown in Figure 2 (r).

In the same figure, rF-24 is the lens side switch (SQ) (
(see Figure 36), and "3" indicates the mode (see Figure 36).
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) Setting the self-timer time The waiting time in Morph mode can be changed, for example, to 2 seconds, 5 seconds, or 10 seconds. The display in this case is shown in Figure 2 (
S), rF-3J is self-setting the second, "1"
indicates the value at the set second (5 seconds). The selection numbers and functions are shown in Table 2 (d).

(vii) A E level change This is to always correct the exposure level of the camera by a certain amount.The setting level is +0.5.
+0.25. O, -0, 25, -0, 5 (Ev), and the selection numbers are 0 to 4 from the left (no table)
It is labeled. The display is shown in FIG. 2 (1),
rF-4J is AE level change mode, "3" is r +
It shows that 0.25EVJ has been changed. In addition, in (i) to (vii) above, by turning on the card key once when setting the mode, (i) to (vii)
modes are selected in sequence, and by pressing the up switch or down switch, the function (setting value) in that mode is selected. Each of the modes (i) to (vii) and functions can be set cyclically.

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

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

When the battery (E) is installed, the battery installation switch (SRE
) turns OFF, and the terminal (RE) changes from “L” level to “
A signal that changes to the "H" 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 (ψ).

The microcomputer (μC) is shown in Figure 3 (RKSET
Execute routine I. In this routine, the microcomputer (μC) first performs an initial setting based on the fact that the battery has been installed (#5). This subroutine is shown in FIG.

In FIG. 4, the microcomputer (μC) prohibits all interrupts to this flow and sets all output terminals to the "L" level. Also, reset all the flags in the RAM [Table 8 (described later)] and RAM (registers), and set the flag (BATF) indicating when the battery is installed (#100 to #1
10). This allows you to change the exposure mode to P mode, spot/
Multi-point AF mode, single shooting (S)/continuous shooting (C), single shooting (S) mode, no exposure compensation, highlights (H)/shadows (S), and one-shot AF ,F
The ul1 non-flash mode, forced non-flash mode, and multi-point photometry mode are set. The contents of this functional data are shown in Table 3.

Next, it is detected by checking the contents of the 2PROM (contents of MSb4, which will be described later) whether the mode setting card of the two types of IC cards mentioned above has been installed at least once and the mode setting has already been performed. Then, if it is not the setting method, disable interrupts other than interrupts caused by IC card insertion (CDINT) and return (#135, #140)
. If using the mode setting method, the contents of E2 FROM (MSbO to MSb3 described later) determine which mode is set.
Examine the contents of the file and decide where to display the changed data. Highlight/Shadow mode (l(/S mode)
, exposure compensation mode (+/- mode), single shooting/continuous shooting switching mode (S/C mode), and spot/multipoint AF switching mode (S/A mode). If set, change data for the first mode set is set (#145~It
182). The RAM change data and E2 PROM setting mode data are shown in Tables 4 and 5. Note that the steps (#145 to #182) correspond to determining the position of a cursor, which will be described later, in terms of display.

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

First, set the terminal (C3DISP) to rH' level, notify the display control circuit (DISPC) of data communication, create data (see Table 9), perform serial communication, and when the data transfer is completed, the terminal (C3DISP) ) to "L" level, and the display control circuit (DISPC) indicates the end of serial communication.
) (#185 to #200).

To briefly explain the operation in the case of serial communication, first, a clock is output from the serial clock terminal (SCK) in response to a serial communication command. The output side outputs one bit of data in synchronization with the rising edge of this clock, and the input side inputs one bit of data in synchronization with the falling edge of the clock. By doing this as many times as necessary, the necessary data can be obtained. An example of a display in a normal photographing state is shown in FIG. 2(u).

In the example of Fig. 2 (U), the displayed contents include shutter speed [1000], aperture value (5, 6),
A E mode CPROGRAM), number of films (with or without film) [17], focus mode (ONE
5) There is a display of IOT AF) and function mode (shape shown in the bottom row). These display data are shown in Table 9 (explanation will be made according to sequence-based display control). The display data here is the AE mode selected by the IC card (CD) in bits b2 to b4 of address (03H), and bits b0 to b0 of address (04H).
Whether mode setting is possible using the b7 IC card (CD),
(iv) by IC card (CD) of bits b4 to b7 of address (08B) and bits bo to b7 of (09H)
The selection number set in the change mode of (vii) is read from the E2PROM and set in each address.

Also, the data in the data change display (address 051 (b)
O~b2), when battery is installed (OAH b4 = 1) (OAH
b1-b3 of H. b5, b6=o) are set at their respective addresses. The display control circuit (DISPC) receives the battery installation signal and outputs the E2 PROM at 0.5 second intervals.
Figure 34(a)
~ The display section (DIS
P+).

Data other than the above is also sent to the display control circuit, but the display control circuit receives the battery installation signal and
It operates to display the displays shown in FIGS. 34(a) to 34(e). The microcomputer (μC) performs 2. at step (#205).
Wait 5 seconds and let this display continue for 2.5 seconds. and,
Number of films stored in E2FROM Nl (MSb1
3~MSb18), film sensitivity Sv (MSb20~M
Read the contents of Sb25) and determine the number of films in RAM N.
l. Transfer to film sensitivity Sv (#207).

After that, card data communication I is performed to check whether an IC card is installed and the type of IC card ($121).
0).

The subroutine for this card data communication is shown in Figure 5 (a).
Shown below. In the same figure, first, a terminal (C3CD) is used to inform the IC card (CD) of communication with the IC card (CD).
) is set to rH'' level, the IC is set to data output mode, and data indicating that it is a data communication device (see Table 6) is sent to the IC card by serial transfer (#300 and #305).

The microcomputer (μC) takes a certain amount of time to input this data on the CD card (CD) side, create the necessary data, and output it.
) waits (#310). And this time, since the data is sent from the CD card ((:D), it operates in input mode and performs serial transfer with the IC card (CD) (#315
), when this is completed, the terminal (C3CD) is set to the rlJ level (#320).

In this operation, the IC card (CD) side outputs 2 bytes of data, but this data is a byte signal indicating the presence/absence of the card, a byte signal indicating the type of card, and a 1 byte signal indicating the camera function. Address (20H, 21H
) is entered.

Next, the type of IC card is determined in (#321), but in the case of a mode setting card, the data only indicates the type of IC card, and the second byte is all rQJ.
Therefore, it returns immediately, and on the other hand, in the case of a program card, the data includes not only the type of IC card but also the AF
Mode continuous/one shot (details will be explained later), AF zone spot/multi-point, metering zone spot/multi-point.

Since it contains function data indicating either continuous shooting or single shooting, or no specific setting (setting by the photographer), it is next determined whether the card function is selected ( #322). Card function is selected (CDF
NF=1), the function data Fb2. Fb3゜Fb
8. Rewrite the Fb12 bit and set the data#
323), return. On the other hand, if the card function is not selected, the process returns without rewriting the data.

Returning to Figure 4, the microcomputer (μC) inputs the input data (
(See Table 7), it is determined whether an IC card is installed or not, and if it is not installed (bo=o in 20H), the process returns without displaying the type of IC card. I
When the C card is installed (bO of 20H = 1),
Determine the type of IC card and select the mode setting card (20H
bl=1), the display data for this IC card (
08H bo=o) is created (#230), and in the case of a program card (20H bl=o), program display data (08H bo=1) is created (#245).

In addition, the card function 0N (04H bo = 1), the control signal 0AH = 0.0, 0, 1, 0, 0, 0.OJ (bo
-b7 @) 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 waits for a certain period of time (0.5 seconds).
, displays data according to the card type. Examples of this display are shown in FIGS. 35(a) and 35(b). FIG. 35(a) shows the state when the program card is installed, and FIG. 35(b) shows the state when the mode setting card is installed. At this time, the card function is forcibly turned on, so this data is also created and sent.

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

In Fig. 3, after completing the initial setting (#5), the exposure mode change switch (SEM) and the function change switch (
SFUN), card function enable/disable switch (SCD)
It is determined in step (#10) whether either the card data setting switch (SCDS) or the photometry switch (SO) is turned on based on the level of the terminal (IF5), and if none of the above switches is turned on. (IP5=rHJ), battery installation flag (BATF
) is set or not in step (#15), and if it is set, after installing the battery, jump to step (#45) as if this step has been reached without doing anything, and then proceed to step (#45). #45) Control is performed to turn off the display and stop the IC card (CD) according to the subsequent flow.

First, as display data 0AH = 0.0.1.0.0
,0. O, Q, and this data is sent to the display control circuit (DI
SPC) (#45 to #60). Therefore, the display is completely turned off.

After sending the light-off data to the display control circuit (DISPC) as described above, the microcomputer (μC) sends a sleeve sign (command to stop the IC card) signal to the IC card (CD) (#65 to #75). This sleeve sign is constructed by bits C3b0 and C3b1 both becoming 1 as shown in Table 6.

After that, the transistor (Tri) is turned off by setting the terminal (PH) to rLJ, and the flag (AELF) indicating the AE block and the flag (BAT) indicating when the battery is installed are turned off.
F), and all interrupts are enabled and stopped (#77 to #95). Note that this halt (HALT) also halts the oscillation of the built-in clock.

In the above step (#10), five switches (S
EM), (S FUN), (S CD), (S
If one of C: DS) and (S o) is turned on, the process advances to step (#91), resets the flag (BATF) indicating when batteries are installed, and proceeds to the next step (
#92) sets a flag (OPF) indicating that one of the five switches mentioned above has been operated, and the routine [S
Execute the CD (#93) and return to step (#10). Routine [SCD is a routine that performs photometry, AF, display, exposure control, etc., and will be described in detail later.

In step (#10), if none of the above five switches are turned on and the battery is not installed (
In BATF=O), it is determined whether a flag (OFF) that is set when passing through the -degree routine [SCD] is set (#15. #25). When this flag is set, the timer (T
1) Reset start and reset the flag (OPI?) (#30. #35). Here, the timer (T
1) Reset and start (#3 (1) is a -degree step (#10) through (#91) (#92) and then the routine (#93), but currently none of the five switches This is to extend the power hold for a certain period of time in consideration of the possibility that the button may be turned on again even though it has not been pressed, and the flag (opp) is reset (#
35) is to indicate that step (1130) has been passed.

In step (#25), if the flag (OPF) is not set, step (#30) (#35
), and detect whether 10 seconds have elapsed for the reset-started timer (#40), and if 10 seconds have passed, proceed to the steps after (#45) to turn off the display and turn off the IC card. (CD) is stopped. 10
If the seconds have not elapsed, go to step (#93),
Repeat the [SO) routine.

Next, I will explain the control of the camera when an IC card (CD) is installed. When an IC card is installed, the terminal (CI)
A signal from rI, J level to r) (J level is input to INT), and the [CDINT] interrupt routine shown in Fig. 4 is executed.When this routine is entered, the microcomputer (μC) Set the flag (OFF) to stop and maintain power (#290. #2
92). Next, in order to give top priority to the display of the type of installed card, in step (#295) all other interruptions to this flow are prohibited, and the process proceeds to steps after step (#210). Figure 35 (a)
Alternatively, after displaying for a certain period of time as shown in (b), set the flag (CDFNF) to forcibly add the card function to allow all interrupts, and return to the original flow [step #10 in Figure 3]. )] to return. With the interrupt enabled, switch (8EM), (S FUN
), (S CD), (S CD5), (S o)
If any one of them is turned on, the interrupt terminal (IN
When a signal transitioning from the "rH" level to the "L" level is input to the TI), the interrupt [■NT1] operation shown in FIG. 3 is entered, and the flow after step (#91) is executed.

In addition, in the state of halt (HALT) t, any interrupt (INTI) (INT2) or [CDlNTl
The clock is designed to start oscillating even when the clock is turned on, and the clock (φ) is also sent to the IC card (CD).

Next, the above routine of [SO3] will be explained with reference to FIG.

First, [INTl] interrupts for this flow are prohibited (#400). This is because if the interrupt (INTl) shown in Figure 3 occurs during the main control, the control operation will not proceed further.
By setting the terminal (pw) of μC) to the rH level and applying a low level to the pace of the PNP transistor (Tri) through the inverter (INI), the transistor (Tri) is set to OWL, the photometry circuit (LM), A F
Supply power to the circuit (AFct), etc. Next, input the information specific to the interchangeable lens from the lens circuit (LE) ($14
10). This is shown in Figure 7 and explained. First, the terminal (
C3LE) is set to "H" level (#800), and serial communication is performed to input information from the lens (#605).

Figure 36 shows the circuit inside the lens, and to explain it, the clock input from the camera is counted by the decoder (2),
Create an address signal. At this time, when the predetermined address is reached, the lens data changes depending on the zoom or the lens data, so the encoders (3) and (4) that detect the focal length and distance are used.
The address circuit (5) detects the focal length and distance.
Change the address by changing the focal length above depending on the distance,
Output specified data to the camera body. The switch (!3Q) is a lens side switch (see Figure 37) provided on the lens (10), and with this,
The address is being changed because the data needs to be changed. The address set in this way is stored in the ROM.
Output to. ROM (6) outputs data based on the designated address. This output is converted into a serial signal by a parallel-to-serial converter circuit (7) and is applied to the camera body.

Next, lens information will be explained. As shown in Table 12, the lens information sent to the camera body includes the lens attachment signal, lens open aperture value (Avo), lens maximum aperture value (AVNIIX), distance information, focal length information, (lens drive (amount/defocus amount) conversion coefficient, ON/OFF of the above-mentioned lens side switch (SQ), information indicating whether or not to drive the lens (LOK), etc., and is stored in the RAM at the address in the body shown in the table. is input.

The signal (L OK) is not particularly relevant on the camera body side in this embodiment, but it changes the address from "1" to "0" when the state becomes such that AF cannot be performed, and the address changes accordingly. be. "1" if AF is always possible
, and does not require 2 bytes. The camera body receives this signal and stops the motor.

On the other hand, on the lens (10) side, the RO as shown in Table 10
M and address configuration. In (A) and (B), two similar data are stored in the same ROM, differing only in SQ quantity relation and LOK relation. Conventionally, there is relatively little lens information, and multiple types of lens information with the same function can be stored in one ROM, and the lens information is switched depending on the lens used. In this case, the amount of information per lens is fixed, and the required ROM is determined accordingly. In such a case, creating (increasing) new data indicating that the switch is ON or OFF means changing the data in the ROM by changing the address according to the 0NOFF state of the switch, which also requires an additional 2 bytes. (ON, 0FF) is required. If there is enough ROM for each type, add 2 bytes 06H and 08H as shown in Table 11 to turn off the lens side switch (SQ).
The address may be changed in response to ON and 068.08H may be selected. However, when there is no such margin, as shown in Table 10, the ROM provided for multiple types [(B) in this embodiment] is switched on and
Assume that the data other than the data changed by OFF is the same,
This can be done by selecting (A) or (B) depending on whether the switch is OFF or ON. However, in this case, this R
There are fewer types of lenses that can be used for OM. Now, when the lens side switch (SQ) is OFF, 06H and 07I (reversely ON), 4; 116H and 171 ((b
o=0. AF Momo-Stop) will now be sent. still,
Address data (XXX) indicates address data that changes depending on zoom or distance, and encoder (3
)(4).

The signal (L OK) in the lens indicates that the lens is not for AF use. Upon receiving this signal, the camera body side prohibits AF operation (lens drive) and performs only focus detection operation. Table 10 shows lenses that can always perform AF operation. For example, some zoom lenses with macros cannot perform AF operation when in tuna mode, and for such lenses, the AF operation is prohibited and LOK b〇-〇 (this can be changed by address change or RO
This is possible by switching to M. ), and when not in macro mode, LOK bo=1 to permit AF operation.

Now, even when a lens that has the function of the above switch (SQ) is attached to an old camera that does not read this bit (because it is new data), it will also have the function of this lens side switch (SQ). (However, when the function changes due to the IC card - focus lock.

Continuous and Spot AF selection - the latter two cannot be done because the IC card is not an old camera, so only focus lock is possible), the above switch (SQ
) is turned on and the LOK signal is set to prohibit AF, the old camera is considered to be a lens that cannot perform AF, and AF operation is prohibited and only focus detection is performed. To execute this, when the switch (SQ) is turned on, the signal is A in Table 10 and 08H in Table 11.

09H9 and when the switch (SQ) is OFF, the values may be changed to B in Table 10 and 06H and 07H in Table 11, respectively.

Regarding the control on the old camera side, it is only necessary to determine whether or not to inhibit AF when reading the lens data, and to control whether or not to inhibit AF, so a description with reference to the drawings will be omitted.

After entering the lens information described above, the terminal (C3
LE) is set to "L" level and returns (#610).

Returning to Figure 6, the microcomputer (μC) continues to input electronic flash device information from the electronic flash device (ST) (#4
15). The information includes three types of information: a guide number (GN) indicating the amount of light emitted, and whether the battery is in a fully charged state, forced light emission, or automatic light emission (this will be described later). Here, the operation of the information communication method will be explained. Furthermore, Fig. 9(a) shows the electronic flash device (ST), and Fig. 9(b) shows the interface (IF).
The circuit diagrams are shown respectively.

First, the microcomputer (μC) connects the terminal (C3S) shown in Figure 1.
T) is set to the "H" level for a certain period of time (tl), and this signal is output to the electronic flash device (ST). Electronic flash device (
ST) detects the time (tl) of this signal, recognizes the data output mode, and outputs data in accordance with the clock from the microcomputer (μC).

In the interface circuit (IF) shown in Figure 9(b), the signal from the terminal (C3ST) of the microcomputer (μC) is sent to the terminal (STI) of the electronic flash device via the OR circuit (OR21).
Output to. At this time, both signals input to the OR circuit (OR21) are at the "L" level. In the electronic flash device (ST), the signal from the terminal (STI) is input to the AND circuit (ANDll), so the AND circuit (A
NDII) becomes active and outputs the signal from the oscillation circuit (O20) to the counter (CNT12). The counter counts this and measures the time (tl). When the time (tl) is counted, the terminal (T1) is set to "H" level and the RS flip-flop (SRII) is set. At this time, the RS flip-flop (SR12) remains reset, and its output peak is at the "H" level. Therefore, the AND circuit (AND12) becomes active.

Next, the microcontroller (μC) is connected to a Glock (
SCK). This clock (SCK) is output to the terminal (STI) of the electronic flash device (ST) via the OR circuit (OR21) of the interface circuit (IF). In an electronic flash device (ST), the input clock (
SCK) is connected in parallel/through an AND circuit (AND12).
It is input to the clock terminal of the serial conversion circuit (P/S). This parallel/serial conversion circuit (P/S) outputs a guide number (GN), a signal 1 indicating a charging completion state, and a signal indicating forced light emission or automatic light emission in synchronization with the clock.

The counter (CNTII) of the electronic flash device (ST) counts the input clock (SCK), and when a predetermined required number is counted, the "H" level is output to the OR circuit (OR II).
). This signal is passed through the OR circuit (ORII) and the one-shot circuit (0811) to the counter (CN
T12) is input to the reset terminal, and the counter is reset.

The counter (CNTII) is a counter that is reset after counting a predetermined number of clocks.

In addition to the above-mentioned circuit elements, the electronic flash device includes a battery (EST) as a power source, a voltage booster circuit (UV) for boosting the voltage of the battery to the voltage required for flashlight emission, and a voltage from the voltage booster circuit (UV). A rectifier diode (
Dll), a main capacitor (MC) that stores the energy necessary for flash light emission, a charging voltage detection circuit (CVD) that detects the charging voltage of the main capacitor (MC), and a light emission control circuit that controls the start and stop of light emission. (FCC).

Returning to FIG. 6, the AF mode is determined in step (#417). This subroutine for determining the AF mode is shown in FIG. 6(a). First, it is determined from the lens information whether the above-mentioned lens side switch (SQ) is turned on (
#4000). If this switch is ON, reset and start the power hold time (starts from 10 seconds) and set the flag (opF) in step (#4005).
Next, read the information from the E2 PROM and check whether the AF mode set by the IC card is the focus lock mode (#4010).
Judge by. Here, if it is focus lock mode (5b28.27=1.1), the bit indicating this (
Fb14) is set, and the bit (Fb13) indicating the auxiliary light mode is reset, and if the tracking mode display is on, it is turned off (14020~#
4030).

This is because in the focus lock mode, since AF operation is prohibited, subsequent AF operation is not required, and the emission of the auxiliary light required for this is prohibited, thereby saving power.

The tracking display is also wasteful since the lens is not driven and the tracking operation cannot be performed after the focus is locked, so the tracking flag is reset and turned off.

Next, determine whether the AF mode set by the IC card (CD) is spot AF (#4035)
. This step (#4035) requires the above step (#4035).
4010), it also occurs when the focus lock mode is not in effect. Here, if spot AF is used (MSb2
6, 27=0.1), the switch (SQ) is turned on,
A flag indicating that this flow has passed for the first time (SQON
Step (#4036) determines whether or not F) is set.
), and if it is not set, step (#4
Step 037), in order to memorize the multi-point/spot mode before the switch (SQ) is turned on, move the contents of bit (Fb2) to bit (Fb15), and proceed to step (#404).
Proceed to 0). If the flag (SQONI?) is set, step (114037) is skipped and the process proceeds to step (#4040). Step (#404
0), sets the bit (Fb2) indicating spot AF, sets the multi-point/spot display flag in step (#4042), and sets the multi-point/spot display flag in step (#4042) to display this mode, regardless of the IC card selection. Proceed to #4045). If spot AF is not selected in step (#4035), steps ($14038 to #4042) are skipped and the process proceeds to step (#4045). Step (#
4045), it is determined whether or not it is continuous AF, and if it is continuous AF (MSb26.2
7=1. O), please set the bit indicating this (Fb8 = 1) #4゜50), the bit indicating auxiliary light (Fb13
) is reset in step (#4055), and the flag (SQONF) indicating that this flow has passed is reset in step (#4055).
#4057) and return. Currently, the auxiliary light mode for continuous AF is designed to save power.
shall be prohibited. With continuous AF, which never finishes focus detection, each time focus detection (integration) is performed,
This is because if the auxiliary light is emitted, the battery, which is the power source, will wear out quickly, and the number of films that can be photographed will decrease. Continuous A at step (#4045)
If not F, proceed to step (#4057), set a flag (SQONF), and return. In addition, in the flow when the switch (SQ) is on, only one of focus lock, spot AF1, or continuous AF is set on the IC card, so for example, focus lock is set in step (#4010). If so, step (#4035) and (#4
045), the answer is NO.

In step (#4000) above, switch on the lens side (S)
Q) is OFF, the process advances 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 there is also a setting for spot AF/multi-point AF using an IC card (CD), and if there is no setting, multi-point/multi-point AF is set to erase the multi-point/spot display.
The spot display flag is reset (#4062). Then, it is determined in step (#4063) whether the switch (SQ) has changed from ON to OFF, and if it has turned OFF (SQONF = 1), the multi-point/spot information before the switch (SQ) was turned ON is determined. To move to AF mode, in step (#4064) the contents of bit (Fb15) are changed to bit (
Transfer to Fb2). If the switch (SQ) has not changed from ON to OFF (SQONF=0), the switch (SQ)
SQ) is OFF and this flow is passed, and step (#4064) is skipped. In either case, the process proceeds to step (#4080).

In the above step (#4061), if it is determined that the setting is set, step (#4065
) to set the multi-point/spot display flag.

Next, in step (#4067), it is determined whether it is spot AF or not, and if it is spot AF, a bit indicating this (
Fb2) in step (#4070), and if it is not an AF spot, reset this bit (Fb2) in step (#4075) (that is, set it to multi-point AF),
Each proceeds to step (#4080). Step (#
4080), it is determined whether there is either one-shot AF/continuous AF setting, and if there is no setting, proceed to step (#4090), set Fb8 = 0 (one-shot AF), and proceed to step (114097). . If there is a setting, one shot A in step (#4085)
Determine whether it is F or not, and if it is one-shot AF, set the bit (Fb8) to indicate this in step (#4090)
If not, step (#4095
) to set the bit (i.e. Continuous AF
), the flag (SQONF) is reset in the next step (#4097), and the process returns.

Returning to FIG. 6, after determining the AF mode described above, the microcomputer (μC) performs card data communication 1 with the IC card (CD) to determine the type of the IC card (CD).
#420). Since this card data communication (2) has already been explained with reference to FIG. 5, the explanation will be omitted here. After the card data communication, a flag (S
(ETF) is set based on ($1425), and if it is not set, determine whether the AF start switch (Sl) is turned on based on the level of the terminal (IP6) (# 427). The above switch (S
l) is turned on (IP6r L J level)
, performs AF control (#429). On the other hand, when the flag (SETF) indicating the data setting mode is set or the switch (Sl) is set to 0FF (IP6="H")
level), the lens control circuit (LECN) sends a signal to stop the AF drive motor to prohibit AF operation.
output to stop the lens drive #431), set the flag (AFNF) indicating that AF is not being performed #435), and reset the flag (SIONF) indicating that the switch (Sl) is ON (#435) 437). When the data setting mode is set in this way,
By prohibiting F control and giving priority to data setting, AF operation is prevented from being performed even if the AF start switch (Sl) is accidentally pressed during data setting.

10(a) to 1 regarding the above-mentioned AF control.
The flowchart shown in FIG. 0(f) will be explained with reference to FIG. 11 showing the focus detection range in the photographic screen. At that time, the photometry range will also be explained.

First, in FIG. 11, the outer rectangle (12) indicates the photographing screen. Among them, (LMI) to (LM4) indicate the photometry range, and (AFL) to (AF3) indicate the focus detection range. Regarding the focus detection range, the camera can switch between spot/multi-point AF, and spot AF
When you select , AF is performed based on the subject information in the focus detection range (AF2), and when multi-point AF is selected, the subject closest to the camera is selected from the above three ranges (AFL) to (AF3). AF is performed to bring the subject into focus. Hereinafter, (AFL) is the first island, (A
F2) will be called the second island, and (AF3) will be called the third island.

To explain the AF control shown in the flowchart of FIG. 10(a), first, in order to detect whether the AF start switch (Sl) is pressed for the first time, a flag (81ONF) is determined and whether it is set or not is determined. If not, it is assumed that it is pressed for the first time, and the flag (A
FEF) and proceed to step (#705).

If it is set, proceed directly to step (#705) without passing through step (#702). Then, it is determined whether the lens is attached or not based on the input signal from the lens (#705). And step (#
If the lens is not attached at step 705), a flag (AFNF) indicating that AF is not being performed is set and the process returns (#800).

If a lens is attached, focus adjustment mode is A.
Pin (IPIO) to indicate whether it is F mode or M mode.
If the AF mode is selected, it is determined by the bit (Fb14) whether the focus lock mode is selected in step (#711). When in M mode, step (#79
After disabling the auxiliary light mode (Fb13=O) in step 8) and executing the manual focus subroutine (MFOCUS) in the next step (#799), set the flag (AFNF) indicating that AF is not being performed. (#8
00), the process proceeds to step (#780) and it is determined whether or not focus is achieved. If the image is in focus, a flag (AFEF) is set; if the image is not in focus, the flag (AFEF) is reset and the process returns.

This manual focus subroutine is shown in Figure 10 (
As shown and explained in d), first, a flag (MFF) indicating manual focus is set, and integration control is performed to control integration and execute data dump. In manual focus, a flag (AF2F) indicating the second island among the three islands in the AF area is set, the day focus amount (DF2) of this island is calculated, and this is set as the day focus amount and returned ( #
4100~#4110).

The integral control subroutine in the above step (#4101) is shown in FIG. 10(b) and will be explained first. performs integration without emitting auxiliary light, dumps data after completion of integration, and returns (#4150. #4155. #41
65. #4170). When it is not impossible to detect the focus and it is in auxiliary light mode, it emits light before the start of integration, and in order to emit light for a certain period of time, the terminal (OLD) is set to the rHJ level for a certain period of time, and integration is performed (# 4150～#
4170).

Returning to FIG. 10(a), step (#710) and (
As a result of the judgment in #711), if focus lock is selected in the AF mode, the lens drive is stopped in step (#712), and a flag (AFE
It is determined whether F) is set #713), and if it is set, proceed to step (#714),
The M focus is controlled and the process proceeds to step (9780).

If not set, proceed to step (#799). The reason for determining focus here is that if the focus is locked after focusing, you want to use the distance data of the subject at the time of focus (used for image magnification) to determine the photometric value. It is.

AF is determined in step (#710) of FIG. 10(a), focus is locked in the next step (#711), and then a flag (AFNF) indicating that AF is not performed is set in step (#715). ), and
In step (#717), a flag (MFF) indicating manual focus is reset. The microcomputer (μC) controls the accumulation (integration) of the charge generated according to the amount of incident light in the COD for distance measurement, and after the integration is completed, the data obtained by digitally converting the integral value is input (#720 ).

Then, in step (#730), it is detected whether it is spot AF or not (detected by Fb2 of the function data), and spot AF (
If Fb2=1), the process advances to step (#735) and executes the spot AF subroutine shown in FIG. 10(d). In this subroutine, a flag (AF2F) indicating that AF is being performed is set based on the second island.
is set, and the day focus amount (DF2) of the second island is calculated from the input data, and this is set as the day focus amount for lens driving (#4102 to #4110).

On the other hand, in step (#730) of FIG. 10(a), multiple points A
When F mode is selected, step (#74
0) and executes the normal AF control subroutine shown in FIG. 10(C). At that time, 1. Second. The day focus amount (DF) of the third island is calculated, and among the above, the day focus amount for the subject closest to the camera is calculated (#4200 to #4215).

The subroutine for determining the day focus amount is shown in FIG. If the object is closer to the camera than the focus position of the lens), it indicates a positive day focus amount, and its absolute value indicates the size of the day focus.To detect the subject closest to the camera, three islands are It is sufficient to detect the maximum (including positive and negative) day focus amount among the day focus amounts, and it is assumed that the main subject exists in the focus detection area.

In Fig. 10(f), the microcomputer (μC) first resets the flag indicating the island (AFIF - AF3F), detects the largest day focus island, and converts the detected island day focus amount into the lens driving day focus amount. , set the above-mentioned flag (AFIF - AF3F) according to the island and return (
#810 to #865).

After calculating the day focus amount, in step (#745) of FIG. 10(a), it is checked whether the focus cannot be detected (the data is unreliable) (for example, it is determined whether the contrast is low, If it is low, focus detection is disabled) If focus detection is not possible, proceed to step (#747) to determine whether or not it was in the auxiliary light mode, and if it was in the auxiliary light mode, further focus detection is performed. It is useless to do this, so please set a flag (LCONF) to indicate this.#
752), resets a flag indicating that it is the tracking mode (described later) (#755), and returns. In step (#747), if it is not the auxiliary light mode, proceed to step (#757) to detect whether the brightness is low or not, and if the brightness is not low, it is useless to emit the auxiliary light.
Proceed to step (#752) and perform the same processing as described above.

On the other hand, when the brightness is low, step (#760) sets the auxiliary light mode (Fb13.1) to step (#75).
Proceed to 5).

Next, if the microcomputer (μC) is not unable to detect the focus,
The flag (LCONF) should be reset (#762), and step (
If the focus is determined in #765), a flag (AFEF) indicating the focused state should be set in #767), and the flag (AFEIF) is set, and the process proceeds to step (#755).

If the focus is not in step (#765), step (#765)
Step #775) executes a subroutine for lens drive control, and then returns. This subroutine is shown in Fig. 10(e) and can be explained as either one-shot AF (once the lens is in focus, subsequent lens driving is stopped, and focus detection may also be stopped at this time), or continuous AF (once focus is achieved, focus detection may also be stopped). It is determined based on data (Fb8) whether the lens follows the subject even after focusing and drives the lens according to the determined day focus amount (#4250).

In the case of one-shot AF (Fb8=O), check whether the flag (AFEF) indicating focus is set (#425).
5), and if it is not set or continuous AF (Fb8 = 1), step (
$14327), (#4330) and step (#
4340), the lens effect is controlled. In step (#4327), the flag (AFEF) indicating focus is reset, and in step (#4330), the lens drive amount (LN) is calculated by multiplying the day focus amount (DF) by the value, In step (#4340), the lens is driven and the process returns. In addition, this step (#4
340) is driven by a lens drive circuit (LECN
) is achieved by driving the lens by a value corresponding to the driving amount (LN).

In step ($74255), when the flag (AFEF) indicating that the focus is set is set, the process proceeds to step (#4260), and the flag (AFEIF) indicating that the focus is achieved from the out-of-focus state is set. Determine whether the When set, preparation processing for tracking determination (determining whether the subject is moving), which will be described later, is performed. First, in step (#4265), a register (DF2) for storing the day focus amount,
(DF3), and store the obtained day focus amount (DF) in the same register (DPI) (#4
27, set the variable ()l) to 0 #4275),
Reset the above (AIIIEIF) (#4280)
, return. In step (#4260), after focusing (AFEF 1), when performing the second or subsequent focus detection (AFEIF=O), the process proceeds to step (#4285), and the day focus is sequentially stored in the register that stores the day focus amount. [The contents of the register (DF2) are stored in the register (DF3), the contents of the register (DPI) are stored in the register (DF2), and the determined day focus amount (D
F) in the register (DPI)] Add 1 to the variable (N) and determine whether this (N) is 2 or more, that is, whether focus detection has been performed 3 times after focusing, and if it is within 2 times, Return without driving the lens (#4285 to #4305).

In step (#4305), if it has been performed three or more times (N22), proceed to step (#4310),
The day focus amount is calculated from the average of the past three day focus amounts (the average of the contents stored in the register), and in the next step (#4315) it is determined whether this value is greater than or equal to a predetermined value KDF. This means that it is determined whether or not the subject is moving at a predetermined speed (on the image plane) in the past three focus detections. When the value is less than the predetermined value, it is assumed that the subject is not moving, and the tracking flag is reset (#4).
320), return.

This flag is used for display (infinder). On the other hand, when the day focus amount is more than a predetermined value,
When the subject is moving, the flag (
Follow F) should be set #4325) and step (#
4327) to reset the focus display flag (focus F) (this is done because the subject is already moving) and set the lens drive amount to the day focus amount (lens Multiply the driving amount/day focus), drive the lens, and return (#4330. #43
40).

Here, the display in the finder regarding focus detection will be explained based on the display in the finder shown in FIG. When it is set based on F), the green LED lights up, and otherwise (focus F=O), it turns off. Further, when the focus cannot be detected (LCONF.1), the red LED is blinked, and when it is not (LCONF=O), it is turned off. (102) indicates a focus detection area, and when the inner area (102a) is displayed, it indicates spot AF, and when only the outer area (102b) is displayed, it indicates multi-point distance measurement. (103) is displayed when the mode for continuous AF or tracking mode is indicated (following F=1), and is turned off when the mode is not continuous AF or tracking mode. (104) "AF/Mu displays AF when in AF mode (AFNF=O), and displays AF in other cases (AF
NF・1) performs M display. In addition, the AF switch (Sl)
When is OFF (31OFF=O), the display in the viewfinder is turned off.

Returning to FIG. 6 again, the microcomputer (μC) controls changes to various data by operating various key switches (11440).

To explain this as shown in FIG. 12, first, the status of each key switch is checked and this is stored in memory (#900).

Next, set the flag (SET) indicating that the card is in card setting mode.
It is determined in (#905) whether or not F) is set, and if the flag (SETF) is set, the process advances to step ($1945). If the flag (SETF) is not set, the process advances to step (#910) and it is determined whether the exposure mode change switch (SEM) is turned on. Here, the switch (SEM) is O
When N is selected, this change subroutine (#9
Proceed to step 15) and return (details will be described later). When the above switch (SEM) is not turned on, the step (
Proceeding to #920), it is determined whether the function change switch (S FUN) is turned on. When this switch (SFON) is turned on, the process proceeds to a subroutine for changing the change (#925) and returns.

Now, the above two subroutines are shown and explained in FIGS. 13 and 14, respectively. First, the exposure mode is changed.
Every time the up switch (Sup) is turned ON once, it progresses sequentially from P-+A→S→M and then back to P, and so on, and every time the down switch (Sdn) is turned ON, it goes sequentially to P4. -A4-84-M, and after P, the camera moves cyclically in the opposite direction to the up direction, but the exposure mode is set by the IC card (CD). The mode will be changed accordingly, and unselected modes will be skipped.

To explain this with reference to FIG.
) is the up switch (
It is determined whether Sup) is turned on, and if it is not turned on, the process proceeds to step (#1055). ON
If so, proceed to step (#1005) and R
AM functional data (Fbn) (FbO) (Fbl)
to determine whether P mode is currently selected as the control exposure mode, and if so, step (
Go to #1010) and check whether the A mode is selected by the IC card by checking the internal E2PROM (MSbO) ~ (
MSb8) (see Table 4) and if selected, changes the exposure mode from P to A and changes the function data (F
bO, Fbl) is changed from (0, 0) to (0, 1) and returns (#1015). The above step (11101
0), if it is determined that A mode is not selected by the IC card, step (#1025)
Go to , determine whether S mode is selected, and select S mode here.
When no mode is selected, an additional step (#
The process proceeds to step 1040) to check whether the M mode is selected and sequentially searches for the selected mode by card. and,
If there is a selected mode, it will be set.

Then, when the A, S, and M modes are not selected, that is, when only the P mode is selected, the P mode is selected (#1050).

Similarly, when A mode is currently selected as the control exposure mode (FbO, Fbl = 0.1), I
Determines whether S mode is selected by the C card, or if M mode is not selected, changes the exposure mode to the selected mode, and selects the bit (
Change FbO), (Fbl) and return (11
1020-to30).

Now, when S mode is selected as the control exposure mode (FbO, Fbl = 1.1), M mode is IC
Determine whether it is selected by the card, if selected, set to M mode, if not selected, P
mode and return (#1035 to #1045)
. When the control exposure mode is not the S mode, that is, when it is the M mode, the mode then becomes the P mode. This is because the P mode is always selected in this embodiment.

In step (#1055), the down switch (Sd
When n) is turned on, the same control as the above-mentioned up switch (S up) is performed, except that the direction of changing the exposure mode is different, so a description thereof will be omitted.

In addition, both switches (S up) (S dn) are set to O.
If it is FF, do nothing and return.

Next, the function change switch (S FI
The control when JN) is turned on will be explained. Microcomputer (
μC) has the four functions mentioned above, namely, highlight/shadow (H/S), exposure compensation (+/-), single shooting/continuous shooting (S
/C), spot AF/multi-point AF (S/A) is selected by checking the E2FROM bit (M
SbO to MSb3), and if none of these bits are set, it is determined that there is no mode selection and the process returns (#1200). If at least one is set, it is assumed that at least one mode is selected, and the step where data should be changed (#1205
) and execute the subsequent flow. The microcomputer (μC) determines whether the switch (SSE) indicating the function to be changed is turned on, and if it is turned on, the function to be changed is H/S→+/−→S/ Proceed from C → S/A, S/A
The next step is to return to )(/S), but if no function is selected by the IC card, it is skipped over.Step (#1
210), when the function to be changed now indicates H/S mode (Table 5 Display RAM Data (7)
CDbO, CDbl, CDb2= O, 0゜0), +
Step (#1215) Check whether the mode is selected by the IC card or not. E2PROM (7) bit (MS)
bl) i, 1m When the yaw is determined and the +/- mode is selected, the data change mode is set to the +/- mode.
Data CDbO to CDb2=0. O, ItoL TeIJ
'3-t6 (#1220). If +/-E-mode is not selected, the process advances to step (#1227), and it is determined by (MSb2) whether the S/C mode is selected. If this is also not selected, (MSb2)
= 0), proceed to step (#1240), determine whether the A/S mode is selected by (MSb3),
If this is also not selected (MSb3=O), the process further advances to step (111250) to determine whether the H/S mode is selected (MSbO). Now, at least H/S mode is selected, so in order to change the function of H/S mode, CDbO to CDb2 = O, O, O
shall be. When S/C mode or A/S mode is selected, select CD to change this mode.
Set bO to CDb2. In the same way, select the mode next to the mode of the function to be changed now (for H/S mode, select ÷7-mode, for +7- mode, select S/C mode, for S/C mode, select S/A mode, for S/A mode, select H/S mode)
Determines whether or not is selected by the card, and if it is selected, the change mode is set to the next mode, and if it is not selected, H/S→+/-→S/C-+S/A-4H/
The function selected by the IC card is searched in order from S-1, data CDbO to CDb2 are set as the function to be changed from the selected function, and the process returns.

As can be seen from this, modes that have not been previously selected by a card will be skipped over to the change mode6.For example, the modes that can be changed in the selection method are +/- and S/C.
function change switch (S FtlN)
When is pressed, the flow goes to step (#1225), and then to step (#1227), where the S/C mode becomes the mode to be changed. On the display, this means that the cursor moves from +/- to S/C.

Next, when the function change switch (SFUN) is pressed again, the flow goes to step (#1235), and from 22 to step (#1240) → (#1250) → (tl121
5), +/- becomes the mode to be changed, and the cursor on the display moves to +/-. In these cases, H/S
Since the mode and A/S mode are not selected, they are effectively skipped over in terms of setting the change mode.

In step ($11205), switch (SSE
) is not ON, step (#1265)
Proceed to.

In step (#1265), up switch (Sup)
Determine whether the function is turned on, and if it is turned on, check the data (CDb) of the function that should be changed now.
O~CDb2), and if it is H/S mode, the currently set mode is data (FbO) (Fb7)
The next mode (→H-+5-ThH/S
data (F
bO), (Fb7) should be set #1270. #12
75), return.

If the function is in +/- mode (#1285), 0.5 is added to the exposure correction amount (ΔEv), and the process proceeds to a subroutine (#1287) for determining the magnitude. This subroutine is shown in FIG. 14(b), and if the correction amount (ΔEv) is positive, data Fb4. If Fb5=0.1 and negative side correction, data Fb4. Fb5=1.
O, and if the correction is zero, no correction is assumed and data Fb4. Return with Fb5=O, O (#1350 to #1370).

Returning to Figure 14 (a), if it is 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 set to be the opposite of the current mode. Change the data to #1295) and return. The above three modes (H/S mode, 10/- mode, S/C mode)
If neither of these is selected, that is, in S/A mode, the current mode is spot A F (S) or multi-point A F (A).
Determine whether it is by data (Fb2) and change the data (Fb2) so that it is opposite to the current mode #1
300), return.

In step (#12f35), the up switch (S
step (#1305) when up) is not turned on.
The process proceeds to step 11, and determines whether the down switch (S dn) is turned on. If it is not turned on, the process returns. O
N, when changing the mode in H/S mode, the order of change must be reversed (←H+-84-No H/S←), and if in 10/- mode, the exposure Except for subtracting 0.5Ev from the correction amount (ΔEv), the flow is the same as that when the up switch (S up) is ON, so the explanation will be omitted (#1310 to #1340).
).

Returning to Figure 12, the exposure mode change switch (SEM),
If both function change switches (SFON) are OFF, the up switch (S up) and down switch (S
dn), aperture value (Av), shutter speed (Tv
) (li927)
Proceed to.

This subroutine is shown in FIGS. 21(a) and 21(b), and will be explained first.
Step (#1800)
), and if it is not turned on, step (#18
The process proceeds to step 05) and determines whether or not the down switch (Sdn) is turned on. If it is not turned on, the process returns. When the up switch (Sup) is turned on,
Proceeding from step (11800) to step (#1810), it is determined whether or not the M mode is set. If it is in M mode (FbO, Fbl = 1. O), proceed to step (#1811) and check whether it is in M1 mode (shutter speed can be changed only by operating the up and down switches) or not in E2FROM. Determine based on the bit (MSb28), and if it is M1 mode (M5b28=O), the aperture change switch (SAv) is activated in the next step (#1821).
Determine whether or not is turned on, and if it is turned on (
IP13 = r LJ') Go to step (#1830) to change the aperture, if it is not ON (IP13 =
rHJ'), the process advances to step (#1823) to change the shutter speed. First, I will explain how to change the shutter speed.
E2 PROM bit (MSb)
29), and if it is 1/2Ev setting mode (MSb29=1), step (#18
50) and set the current shutter speed (Tv) to 0.
5 is added, and the process proceeds to step (#1855).

On the other hand, when performing in I Ev increments (MSb29=O), the current shutter speed is Ev/
2, and set the set value of Ev/2 [for example, Tv
= 0.5 of 6°5 (331/90)], then in step (#1825) add 0.5Ev to this and CTv = 6.
．． 5 → Tv=7 (331/90 → SS 1/120)
), l Ev unit, and further step (#1
826), lEv is added and the process proceeds to step (#1855). In step (#1855), it is determined whether or not the set shutter speed exceeds the maximum speed (Tvmax), and only if it exceeds, the shutter speed is limited to the maximum speed (#18).
60), return. If not, skip step ($11860) and return. In step (#1821), the aperture change switch (SAv
) is ON, the aperture value change mode is assumed, and the aperture value (Av) is set to 0 in step (#1830).
．． 5Ev is added, and this is the maximum controllable aperture value (AV
It is determined whether or not it exceeds maj (#1835).

If it exceeds it, set the maximum aperture value (AVaax) as the aperture value (Av) (#1840), if it does not exceed it, do nothing and proceed to step (#1845) to check if it is in P mode. If the mode is P mode, step (#1) of the flowchart of FIG.
879). Returns if not in P mode.

In step (#181.1), when the Ml mode is not set (MSb28=1), it is determined in step (#1822) whether or not the aperture change switch (SAv) is turned on, and if it is turned on, the shutter speed As a change, proceed to step (#1823), and if it is not turned on, change the aperture, and proceed to step (#1830).

If it is not M mode in step (#1810), it is determined whether it is in P mode or A mode in steps (#1815) and (#1820), and P mode, A
If it is either one of the modes (FbO, Fbl= O, O or 0, 1), proceed to step (#1830) and perform up control of the aperture value (Av), and if it is neither, that is, S mode. (FbO, Fbl=1.1), the process proceeds to step (#1823) and controls to increase the shutter speed (Tv).

When the down switch (Sdn) is turned on in step (#1805), step (#1805) in FIG.
1865), determines whether the mode is M mode, and
mode (FbO, Fbl=1.0), proceed to step (#1876), determine whether or not the mode is M1, and when the mode is M1 (MSb28=0), press the aperture change switch (SAv). Check to see if it is turned on (#1.877). If it is turned on, go to step (#1885) to change the aperture; if it is not turned on, go to step (#1885).
Proceed to step (#1879) to change the shutter speed. In step (#1879), it is determined whether the setting mode is 1/2Ev increments, and if it is 1/2Ev increments (MSb29=1), the process proceeds to step (#1905), and from the set shutter speed, 0 Subtract .5Ev,
It is determined whether this is slower than the minimum shutter speed (Tv*+n) of the camera (#1907), and if it is slower, the shutter speed is limited to the minimum shutter speed (#1908); otherwise, the process returns without doing anything. If it is IEv increments (
MSb29=O), determines whether the current setting value is in 1/2Ev units, and if it is in 1/2Ev units, 0.5
Add Ev, subtract 1, OEv from the added value, and return (#1880 to #1882). Step (#1
880), if the unit is not 1/2Ev, step (#1882) converts this value into 1. Subtract OEv,
Then proceed to step (#1907). Step (#187
When the aperture change mode is determined in step 7) (SAvON)
, in step (#1885), the aperture value (Av) is decreased by 0.5Ev, and then in step (#1890
) to determine whether the value is smaller than the open aperture value (Av,), and if it is smaller, the aperture value is set to the open aperture value (Av,).
(#1895).

Next, step to determine whether it is in P mode (#1900)
Judge by. In step (#1890), if the aperture value (Av) is not smaller than the open aperture value (Av, ), step (111895) is skipped and step (#1900) is entered. This step (111900
), if the mode is P, the control flow for increasing the aperture value (#1823 to #1860) shown in FIG.
), and if not in P mode, return.

In step (#1876), if it is not the M1 mode (MSb28=1), the process proceeds to step (#1878), where it is determined whether or not the aperture change switch (SAv) is turned on, and if it is turned on, the shutter Proceed to step (#1879) to change the speed, and if it is not ON, proceed to step (#18) to change the aperture.
Proceed to step 85).

In step (#1865), if the mode is not M mode, step (#1870) and (1875) sequentially determine whether the mode is P mode or A mode. 1885) onwards, proceed to the flow for controlling the aperture value reduction, and if not, proceed to step (#1879) assuming that the S mode is in effect.
) and control the shutter speed down.

Returning to FIG. 12, steps (
11927), the process proceeds to step (#930).

In this step (#930), a normally open switch (SC) is used to enable or disable the functions configured by the card.
It is determined whether or not D) is turned on, and if it is turned on, the process advances to step (#935), a subroutine for the card function enable/disable switch 0N (SCDON).

This is shown in FIG. 15 and will be explained. First, step (#1
400), it is determined whether or not the IC card (CD) is loaded in the camera based on the data (CkbO), and the IC
If no card is loaded (CkbO=O), return immediately. When the mode setting card is loaded, the card function enable/disable switch (SCD) is operated and the flag (CD) indicating that this flow has been passed once is set.
Determine whether F) is set (#1405
). If it is set, it is assumed that the valid/invalid switching has already been completed during the operation and the process returns. If it is not set, proceed to the next step (#141
0), sets this flag (CDF), and then in step (#1415), determines the flag (CDFNF) indicating whether the card function is valid/invalid, and if it is not set, sets it to activate the card function. Effective #1
42, if it is set, it is set and the card function is invalidated (#1425), and the process returns.

The flow when the card function enable/disable switch (3CD) is ON in the determination at step (#930) in FIG. 12 was explained above in accordance with FIG. 15. When the enable/disable switch (S CD) is OFF, step (#94
Proceed to 0).

The flow of this step (#940) will be explained with reference to FIG. 16. First, in step (#1450) it is determined whether or not an IC card is installed. = o) returns, IC
When the card is loaded (bo=1 in 20H), the process advances to step (#1455) and a flag (CDF) is set indicating that the flow after step (#1405) in Figure 15 described above has been passed once. If the flag (CDF) is set, reset it in the next step (#1460) and return; if the flag (CDF) is not set, Return as is.

Returning to Figure 12, the microcomputer (μC) then steps (#
945) to change the mode using an IC card or set or reset the data setting mode.
CDS) is ON or OFF, and if it is ON,
If it is OFF, the process returns through steps (#955) and (#950) related to the control of each subroutine. This will be illustrated and explained in FIGS. 17 and 18.

First, Fig. 17 shows a subroutine when the switch (SCDS) is turned on. In step (#1500), the microcomputer (μC) determines whether a mode setting card is installed, and if the card is installed. If not (b2=o in 20H), return immediately.

If the mode setting card is installed (b2 of 20H)
=1), check whether the flag (CDSF) indicating that this flow has been passed once is set. #151
0), if it is not set, please set this #1
515), if set, step (#15
15) and return.

Next, the OF of the switch (SCDS) shown in FIG.
To explain the subroutine of F, first, it is determined in step (#1550) whether or not the mode setting card is installed, and if it is not installed (b2=o in 20H), the process returns. If installed (b2 = 1 on the 20th
), the flag (CDSF) is set in the step (#1555) of determining whether the switch (SCD5) is operated and the flag (CDSF) indicating that the flow of the relevant (5CDSONI) has been set. If it is not set, return (#1555).If the flag (CDSF) is set, press the switch (SCDS) to enter or release the data setting mode.
) is turned ON or OFF, and to determine which of these, a flag (S) indicating the data setting mode is set.
ETF) is set (#15
60). As a result, if it is determined that the flag (SETF) is set, step (#1570
) and then E2 in step (#1572).
Flag indicating data writing to PROM (WRTF)
Assuming that the data setting mode has been canceled by operating the switch (SCDS), step (#15
75) to reset the flag (CDSF) and cancel the data setting mode. If it is not set, this flag (SET) indicates a transition to data setting mode.
F) (#1565) and the flag (CD
SF) (#1575) and return.

After completing the key setting control shown in FIG. 12 in the above manner, the microcomputer (μC) moves to step (#
Step 440) proceeds to step (#445) where photometric data is input from the photometric circuit (LM) to create a spot photometric value to be used for exposure. Here, creation of photometric values will be explained with reference to the photometric range shown in FIG. 11 and the flowchart for inputting and creating photometric data of the microcomputer (μC) shown in FIG. 19. In FIG. 19, the microcomputer (μC) first determines in step (#1600) whether or not a flag (AELF) indicating AE flock is set, and if the flag (AELF) is set,
Returns because the photometric value is not updated. Flag (A
ELF) is not set, the terminal (C3L
M) is set to rHJ level, a command is given to the photometry circuit (L M ) to output photometry data, and serial communication is performed (#1605. #1610).

Through this communication, the brightness values (Bvl to Bv4) of the four photometric ranges shown in FIG. 11 are input. When communication is completed, set the terminal (C3LM) to “L” level (#1615)
. Then, in the next step (#1620), it is determined whether spot photometry is selected, and if it is selected (Fb12=1), the brightness value (Bv
2) is set as the spot value (Bvsp) (#1660).

When in multi-point mode (Fb12=O), step (1
11620) to (111622), it is determined whether or not a flag (AFNF) indicating that the AF mode is not set is set to 1~, and further, a flag (LCONF) indicating that focus detection is not possible is set in step (#1624). If either one is set, the small photometric range (LM2) in the center is returned as the spot value (Bvsp). Flag (AFNF
) and (LCONF) are not set, 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 in the next step (#1630), it is determined whether this image magnification β is greater than or equal to a predetermined value (KB),
Determine the size of the subject that will occupy the shooting screen.

If it is more than the predetermined value, the object is considered large and the step (#
1640) and each photometric range (LMI), (LM2) (
Luminance values (Bvl), (Bv2), (Bv
Let the average of 3) be the spot photometric value (Bvsp).

When the image magnification β is less than a predetermined value, the photometric range including the focus detection range used for focus detection is set to the photometric value of the main subject (B
vsp). In this embodiment, which flag (AFIF - AF
The range is determined by whether the flag (AFIF) is set, and if the flag (AFIF) is set, the brightness value (Bvl) of the photometry range (LMI) is determined, and if the flag (AF2F) is set, the range is determined. is the brightness value (Bv2) of the photometry range (LM2), and when neither flag is set, that is, when the day focus amount of the third island (AF3) is selected, the brightness value (Bv2) of the photometry range (LM3) is B
v3) respectively as spot photometric values (Bvsp) (#1
645~#1665). Then, it is determined whether or not focus is achieved,
When in focus (AFEF=1), the AE flock flag (AELF) is set to perform AF-AE flocking, and when not in focus (AFEF=O), the AE flock flag (AELF) is set to perform AF-AE flocking.
LF) and return.

After determining the spot photometry value in this way, the microcontroller (
μC) proceeds to step (#450) in FIG. 6 and performs control regarding the AE flock, which will be explained with reference to the flowchart shown in FIG. 20. Furthermore, here,
To cancel the AE flock, use the AE flock switch (SAEL
) is pressed once, the AE lock is activated for the duration of the time it is pressed, and when the AE lock switch (SAEL) is pressed again or the power self-hold is released, the AE lock is released (10 seconds). There are two modes: hold mode) and a mode in which the AE flock state is maintained only while the AE flock switch is pressed, and these modes are selected by the IC card. In FIG. 20, in step (#1700), the microcomputer (μC) first determines which of the two modes it is in based on the E2FROM data (MSb5), and when it is in the 10 second hold mode, Proceeding to step ($1705), it is determined whether or not the AE frog switch (S AEL) is turned on. If it is not turned on, the AE frog switch is operated and the flow from step (111705) onward is executed. Reset the flag (AEONF) indicating (#1
710), returns.

In step (#1705), if the AE flock switch (SAEL) is turned on, the above flag (AE
ONF) is set or not in step (li1
715), and if it is set, return immediately.

If it is not set, proceed to step (#1720) and flag (
AELF) is set or not, and the flag (AELF) is set.
If AELF) is not set, it is assumed that an operation was performed to perform AE logging, and this should be set #1730
), when the flag (AELF) is set, A
The flag (AELF) should be reset because the E-frog was operated to release it while it was operating (#1725), and the process goes to step (#1735) and the AE float switch (SAELF) is reset.
EL) is operated, a flag (AEONF) indicating that this flow has been executed is set, and the process returns.

In step (#1700), if it is not in the 10 second hold mode, in step (#1740)
It is determined whether or not the flock switch (SAEL) is turned on, and if it is not turned on, the flag (AELF) is reset (#1755). When it is turned on,
Set the flag (AELF) (#1745), reset and start the power hold timer (T1) (#1
750), return. In this way, when the AE flock switch (SAEL) is turned on, the power is maintained.

In FIG. 6, after controlling this AE block, the microcomputer (μC) performs second data communication with the card in step (#455). This data communication will be explained with reference to FIG. 5(b). In step (#325), the microcomputer (μC) determines whether or not a card is installed, and if it is not installed (CkbO=O
) Returns without data communication. If the card is installed, set the terminal (C8CD) to rH” level.#
330), output data to IC card (CD) #3
35) indicates that the IC card is the input side. After that, in step ($1340) it is determined whether or not the IC card installed in the camera is a mode setting card, and if it is an IC card in data setting mode (20
b2 of H = 1), set the switch data that was sensed and memorized in step (#900) in Figure 12 #3
44), performs serial communication (#348), and outputs the switch information to the IC card (CD). After that, the terminal (C3CD) is set to the "L" level (#350) and the process returns.

In the judgment in step (#340), if it is not a mode setting card, that is, if it is a program card (20
H b2=o), set the exposure calculation data, flash data, and lens data that are necessary for exposure calculation, perform serial communication, and transfer these data to I.
Outputs to C card, sets terminal (C3CD) to "L" level, terminates data communication, and returns (#346~
$1350).

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

(BVAv), film sensitivity (Sv), and data indicating whether it is a positive or negative film. Lens data includes focal length data, open F value (Av, ), and maximum aperture value (AVmsx), and flash data. includes data indicating whether the flash is forced to fire or automatic, data indicating whether the flash is not installed (including power OFF), GN (guide number), data indicating whether charging is complete, etc.

When the above-mentioned card data communication (II) is completed in FIG. 6,
The microcomputer (μC) proceeds to step (#460) and performs exposure calculation here.

The flow of this control is shown and explained in FIGS. 22 to 26. First, the microcomputer (μC) performs the step (#2
000) to determine the amount of exposure (△Evl) to be constantly corrected from the E2PROM MSb32 to MSb34, and then add the manually set exposure correction amount (△Ev) to calculate a new exposure correction amount ( #2001). Then, in step (#2002), it is determined whether the lens is attached or not based on the lens data that has been used for a long time. If the lens is not attached, the photometry value (BVAM) of the photometry range (LM4) (this The shutter speed is calculated by adding the film sensitivity (Sv) and the exposure correction value (ΔEv) to the overall averaged photometric value (instead, the photometric value averaged over the whole may be used), and the process returns (#2005). If a lens is attached,
Perform exposure calculations according to each exposure mode (#2010 to #
2040).

Therefore, the exposure calculation for P mode is shown in Figures 23(a) to (c).
To explain it as shown in the figure, the microcomputer (μC) first
In step (#2100) of Figure (a), the backlight condition is determined using the photometric value (BVAM) of the photometric range (LM4) and the spot photometric value (Bvsp) obtained in step (#445).
Judgment is made based on whether the difference is 2Ev or more (#210
0). If it is 2Ev or more, it is determined in step (#2105) whether the electronic flash device is ready to emit light (the main capacitor is fully charged), and if it is ready to emit light, the terminal (FLOK) is set to "H". Level (#21)
10) Enable flash photography and set the control exposure value (Ev) from the photometry value (BVAM) of the photometry range (LM4), etc.
Calculate by BVAM+Avo+Sv-1+ΔEv (#2115). Here, the reason for subtracting 1 is to make the background appear to be over IEv to make it look like it is backlit.

In addition, I am trying to properly expose the main subject using a flash from an electronic flash device. Then, the program ■ subroutine (#2) that determines the aperture value (Av) and shutter speed (Tv)
120) and return. This is shown in Figure 23(b)
The shutter speed control value (Tvc)
The tuning Tv = 7 (SS = 1/125), the aperture value (Av) is calculated by subtracting 7 (shutter speed) from the exposure value (Ev), and this aperture value (Av) is 7 (F = 11
), and if it is, limit the control aperture value (Avc) to 7 and return (#2215)
. If the aperture value (Av) is 7 or less, the calculated aperture value (Av)
v) is smaller than the open aperture value (Avo), and if it is, the open aperture value (Av,) is changed to the control aperture value (Avo).
vc), and if it is not smaller, return the calculated value (Av) as the control aperture value (Avc) (#2220 to #2
230).

Returning to FIG. 23(a), in step (#2105), if the electronic flash device (FL) is not ready to emit light, set the terminal (FLOK) to the "L" level.
5) In order to properly expose the main subject, control exposure value (E
v) from the spot value (Bvsp) of the photometry range, etc.
v= Bvsp+ Av, +Sv+△Ev (#
2130), aperture value (Av), shutter speed (Tv)
Proceed to the subroutine (#2135) of the program (#2135) to find the result and return.

This is shown and explained in Fig. 23 (C). First, in step (#2250), the aperture value (Av) is set to Av=5/8Ev.
-25/8, and determine whether this aperture value (Av) is larger than the maximum aperture value (AVam,) of the lens (#2255), and if it is larger, the maximum aperture value (Av,,
, ) as the control aperture value (Avc) (#2260),
Proceed to step (#2280). Step (#2255
), when the aperture value (Av) is less than or equal to the maximum aperture value (AV@□), it is determined whether the aperture value (Av) is smaller than the maximum aperture value (Av, ), and if it is smaller, the maximum aperture value (Av, ) is determined.
Av.

) as the control aperture value (Avc), and if it is not smaller, set the calculated aperture value (Av) as the control aperture value (Avc) and 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), it is determined whether this is greater than the maximum shutter speed (TVmsx), and if it is, the control Shutter speed (Tvc) (
Tv, □) (#2290), and if it is not large, it is determined in step (#2292) whether the shutter speed is slower than the slowest shutter speed (TV@+n), and if it is slower, (Tvs+n) ) as the control shutter speed #2293), and if it is not slow, the calculated shutter speed (T
v) as the control shutter speed (Tvc) (1122
95), return.

Returning to FIG. 23(a), in step (#2100), when the difference between BVAM - Bvsp is less than 2, it is determined that there is no backlight condition and the process proceeds to step (#2145), and the average of the photometry range (LMI) to (LM4) is Photometric value (Bvl+
Bv2+ Bv3+ Ev4)/4 to exposure value (Ev
) and detects whether the flash device is ready to emit light (#2150).

When the light emission preparation is complete, step (#2155)
Proceed to Step 3 to determine whether or not the flash photography auto mode is in which the presence or absence of flash photography is automatically determined, and if it is in the auto mode, determine the aperture value (Av) and shutter speed (Tv) using the program ■ above. (#2160), the shutter speed (Tv) is the camera shake warning speed (Tv = 6.17
60) (#2165). If the speed is less than the camera shake warning speed, proceed to step (#2170) to perform flash photography as a low speed, and also proceed to step (#2170) to perform forced flash photography even when not in auto mode in step (#2155). . Then, use program ■ to set the aperture value (Av) for flash photography.
) and shutter speed (Tv) and determine the terminal (FLOK)
r) (J level #2175), which enables flash photography.

However, in step (#2150), if the preparation for emitting light is not completed, proceed to step (#2180) for shooting with constant light, decide the aperture value (Av) and shutter speed (Tv) according to program F
LOK) is set to "L" level (#2185) and returns.

Also in step (#2165), the shutter speed (
When Tv) is 7 or more (synchronized speed or more), the process similarly proceeds to step (#2185) and returns.

Next, Fig. 24 shows a flowchart for determining the aperture value (Av) and shutter speed (Tv) in A mode. First, it is determined whether the electronic flash device is ready to emit light. , if the light emission preparation is complete, set the control shutter speed (Tvc) to 7 (1/125) and connect the terminal (F
LOK) to r)(J level, set aperture value (Av)
is returned as the control aperture value (Avc) (#230
0 to #2310 and #2345). If the flash preparation is not completed, calculate the exposure value (Rv) from the average metering value, and subtract the set aperture value from this exposure value (Ev) to determine the shutter speed (Tv) (#, 2315. #232
0). Then, in the next step (#2325), it is determined whether the shutter speed (Tv) is greater than the maximum controllable shutter speed (Tvsax), and if it is larger, the maximum shutter speed (Tvsax) is determined in step (#2330). T
The process proceeds to step (#2340) with Vsaj as the control shutter speed (Tvc). If not, it is determined in step (#2331) whether the speed is lower than the controllable minimum speed (Tvstn), and if it is low, (Tv-+n) is controlled in step (#2333). If the shutter speed is not lower than (Tvstn), the calculated value (Tv) is set as the control shutter speed (Tvc) in step (#2335), and the process proceeds to step (#2340). In step (#2340), the terminal (FLOK) is set to r], J level, and the next step (
#2345), the set aperture value (Av) is the control aperture value (A
vc).

Next, the control in S mode is shown in FIG. 25 and explained. First, in step (#2400), the exposure value (Ev
) is calculated from the average photometric value, etc., and it is determined in step (#2405) whether or not the light emission preparation is complete. If the light emission preparation is complete, the terminal (FLOK) is set to r) (J level (#2410). ).

Next, in step (#2415) the shutter speed (Tv
) is 7 or less, and if it is 7 or less, the set shutter speed (Tv) is controlled.
) and #2420), and if it exceeds 7, the synchronization speed 7 is set as the control shutter speed (Tvc) and the process proceeds to step (#2430).

In step (#2430), the aperture value (Av) is obtained by subtracting the control shutter speed (Tvc) from the determined exposure value (Ev), and this aperture value (Av) is determined as the maximum aperture value (Av).
). If it is smaller, the control aperture value (Av, ) is set as the open aperture value (Av.) (#2440) and the process returns. On the other hand, the aperture value (A
If v) is not smaller than the open aperture value (Av, ), then
It is necessary to judge whether it is larger than the maximum aperture value (Avmsx) ($12445), and if it is larger than the maximum aperture value (Av,,
) is set as the control aperture value (Avc) #2450), and if it is not larger, the calculated aperture value (Av) is set as the control aperture value (Avc).
) and returns ($12455).

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

Next, when the mode is M mode (see FIG. 26), it is determined in step (#2500) whether or not the light emission preparation is complete;
If the process is not completed, set the terminal (FLOK) to "L"level; if it is completed, set the terminal (FLOK) to "H" level, and proceed to step (#2515).
The preset aperture value (Av) is returned as the control aperture value (Avc), and the shutter speed (Tv) is returned as the control shutter speed (Tvc) in the next step (#2520).

Returning to FIG. 6, after completing the exposure calculation (#460), 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. First, the terminal (
C3CD) to rHJ level, and insert the IC card (
CD) (#360) and informs the IC card that the IC card is on the output side (#36
0). At this point, wait for some time #365), perform serial communication and input data from the IC card (CD) #
370), and when this data communication is completed, the terminal (C3CD
) to the "L" level and return.

In this flow, the data sent from the IC card (CD) is different when the IC card is a mode setting card and when it is a program card.
First, in the case of a mode setting card, there are mode setting data and display control data that determines whether or not to display. In other words, ■ shutter speed for control (C-Tvc), ■ aperture value for control (C-Avc), ■ presence/absence of flash emission, ■ setting/not setting flash dimming to full emission (Ful1 emission), ■ card. There is data on whether control is performed or not. (See Table 7) After completing this card data communication (III) in Figure 6,
The microcomputer (μC) executes the card control flow of step (#470). This flow describes how to determine whether or not to control the camera using an IC card (in this case, a program card) based on input data, and how the camera operates when this is done. To explain it as shown in Figure 27, the microcomputer (μC) first checks whether the card function is selected or not in step (#2602).
) and the card function is selected (CDFNF
= 1), proceed to step (#2605). On the other hand, the card function is not selected (CDFNF=O)
Sometimes, the function bit (F
b9) and (FblO) respectively to O, and further (#2
680), the dimming level change amount (FΔEv) is reset and the process returns. When the card function is selected, next it is determined whether a program card is installed or not.
If the program card is installed (b2 of 20H)
= O) In step (#2610), it is determined whether the camera is controlled by the IC card or not based on the data input from the IC card (CD). Then step (#2
605) and is not a program card (b2 of 20H = 1
) or if the camera is not controlled by an IC card in step (#2610), the process advances to step (#2680) via step (#2677).

If it is determined that the camera is controlled by an IC card, the control aperture value (Avc) and control shutter speed (Tv
c) The presence/absence of Ful1 light emission, the presence/absence of flash light emission, etc. are determined based on the data input from the IC card (112615 to #2645). Next, use the input data to determine whether it is in flash mode or not (#2650)
, when not in flash mode, set the terminal (FLOK) to “L”
Level 112685), Step (#2680)
Proceed to. When in flash mode, the terminal (1?LOK
) to rH, level #2655), and detects whether it is in the Full 1 light emission mode (#2660). And Fu
When in l1 light emission mode, set the terminal (Full) to rH'' level in step (#2665) and return.
When not in the ulL emission mode, the terminal (Full) is set to r.
Set the LJ level (112670), set the dimming level value change amount (C-FΔEv) (#2675), and return.

In FIG. 6, when the routine for determining and controlling the camera using the IC card as described above (lt470) is completed, the process moves to display control (71472).

Table 9 shows the contents of data sent from the microcomputer (μC) to the display control circuit, so to explain this first, the shutter speed and aperture value are set to set or calculated values. The display of various modes is set according to the mode set at that time. AE mode display is b
o, bt are the currently selected modes, b2 to b4 (display data corresponding to change mode H) are E2 PROM
Data is read from and data is set. Data for the card display and data change display is set according to the currently set mode.

b7 (spot/multi-point forced display) is set to "1" when the flag (multi-point/spot display) is set, and the multi-point/spot display on the display section (DISp+) on the camera body When each mode is forcibly selected (spot AF by program card or spot AF by multi-point switch (SQ)) using a display indicating that mode change is possible, it becomes impossible to change multi-point/spot mode. Regardless, multiple points or spots are displayed. In the display control circuit (DISPC), when b7=1, multi-point or spot display is performed according to the signal b6.

The number of films is set to the number of films at that time, and the button and tongue display are also set to the display data of the state at that time.

The IC card related mode display is (I) r bOJ,
It is set according to the installed card, and other (
I, n, I[I] are set from the E2PROM (except when setting data), and when setting data, change mode data sent from the IC card is set. The control is
Set according to camera sequence.

The display control circuit (DISPC) determines what to display based on this control data. The LED is
Data is set when needed for display. Display control is shown in FIG. 28 and will be explained.

First, the microcomputer (μC) determines in step (#2700) whether or not a flag (CDFNF) indicating whether the card function is working is set. If it is set, the next step ( #2710) ~ (#272
In step (#2710), it is determined whether a flag (CDIF) indicating that the path 0) has been passed once is set. Here, if the flag (CDIF) is not set, set it in step (#2715),
Step (#27) a flag (DISPIF) for displaying the functions added by the card for a certain period of time when the card function changes from a state in which it is not working to a state in which it is working.
20) and proceed to step (#2725).

When the card function is not working (CDFNF=O), reset the flag indicating that steps (#2710) to (#2720) have been passed once in step (#2705) and proceed to step (#2725). , and this flag (
CDIF) is set, the process proceeds from step (#2710) to step (#2725) without doing anything.

Step T'/P (#2725) TeLi, the above flag (DI
SPIF) is set or not, and if it is set, it is determined in step (#2727) whether the card type is a program card, and if it is a program card, rPR○. , rCARD, which indicates that the card is working, is created in step (#2728). Note that the display in this case is as shown in FIG. 35(a).

Specifically, the display register (RAM) address (O
b5 of AH). b6 to r 1. Toshi O.J.
Let b1 to b4 be "O".

Thereby, the display control circuit (DISPC) reads this data and displays it on the display section.

If it is not a program card, that is, if it is a mode setting card or if the card is not loaded, step (#272
In step 9), display the functions of the card set in the camera as shown in Figures 34 (a) to (e).
<< OAH no b5. b6=1.1. bl ~
b4=Ott 6° Note that the display data and display contents change depending on the set contents.

If the flag (DISPIF) is not set in step (#2725), it is determined in the next step (#2730) whether or not to perform display control using a card, and if display control is performed using an IC card (CD), OAH b5. is used to display data according to the mode setting data input from the IC card. b6=o, bl~b4=0
(#2735).

If there is no card display control signal from the IC card in step (#2730), proceed to step (#273B);
Determine whether the write flag (WRTF) to E2FROM is set. Write flag (WRT
When F) is set, that is, when the card-based data setting mode is completed, the process proceeds to the mode setting subroutine (#2737) to set the mode. Further, the process proceeds to step (#2740), where b5. b
6=O.

1. Set b1 to b4=O. Note that if the card function is not working (CDFNF=O'), data is created to set bo=o at address 0AK (in order to delete the "card" display).

Each step (#2728), (#2729), (#
2735) and (#2740), the presence/absence of focus display is determined by the flag (A
FEF), presence/absence of focus detection failure display is a flag indicating that focus cannot be detected (LCONF), presence/absence of display indicating continuous or tracking is a flag indicating tracking mode (following F)
, or indicates continuous AF (Fb8), multi-point ranging/spot ranging is a bit indicating the function (Fb2), S
LON, OFF is 5LON, OFF flag (
bO to b5 of the address OCH are respectively set according to the switch (SIONF).6 Note that the display control circuit (DISPC) outputs a signal (SIONF) indicating that the switch (Sl) is OFF.
SLOFF), the infinder display is turned off regardless of the signals (bO to b4).

Step (#2728) (#2729) (#2735)
In all cases of (#2740), step (#2
745), the terminal (C8DIsp) is set to "H" level in order to perform data communication with the display control circuit (DISPC), and then, in step (#2750), serial communication (
After communication is completed, connect the terminal (C8DI
SP) to the "L" level (#2755).

Next time the card function is activated, it is determined in step ($12760) whether or not a flag (DISPIF) indicating a certain period of time display is set, and if it is set, wait 2.5 seconds (#2765) . Display is performed during this time.

Next, in step (112770) the flag (DISPIF
) and proceed to step (#2780). If the flag (DISPIF) is not set in step (#2760), skip steps (#2765) and (#2770) and proceed to step (#2780).
). In step (#2780), it is determined in step (#2780) whether the control shutter speed (Tvc) is less than 6 (1/60), and if it is less than 6, a mode for issuing a buzzer warning is selected. Determine whether or not there is (
#2785). If selected (MSb9 to MSb1
2 = OH, 2H, 4H, 6H, 8H, Ai(, CH
, EH) is connected to the terminal (OBZ
) to output a pulse of a predetermined frequency for a certain period of time #27
90), proceed to step (#2792).

When the control shutter speed (Tvc) is 6 or more or the mode does not provide a buzzer warning (MSb9 to MSb1)
2= 111.3H, 5H, 71-1, 9H, BH, D
H, FH), step (1127) is not issued with a buzzer warning.
92).

In step (#2792), the camera function indicated by the input mode setting data is set to MSbO to M in the E2PROM.
Determine the flag (WRTF) indicating whether to write to Sb12, and if set, step (#2794)
The above mode setting data, i.e. address 22H b1-b4 address 23) (bo-b2.b4-b7 address 2)
4H bO~b6 Address 26H bo-b2 of E2FROM (MSbO~MSb3. MSb5~
MSb12. Write to the bit according to the data contents of MSb26 to MSb34) and step (#2796)
The flag (WRTF) is reset with , and the process returns. If the flag (WRTF) is not set in step (#2792), the process returns directly.

The above mode setting subroutine (#2737) is the 30th
To illustrate and explain it in the figure, here, it is determined whether the mode currently set on the camera is in the newly set mode or not, and if it is not, it is moved to another set mode. There is. For example, if A mode is currently selected for exposure, but if A mode is removed from the exposure mode selection by an IC card, the A mode remains as before.
It would be strange to display and control the mode, so this is prevented.

Now, in the flow of Figure 30, the microcomputer (μC)
First, set the flag (CHGF) that is reset when there is a changeable mode (#320Q), and check whether the settable exposure mode has been changed using the E2FROM data (#320Q).
MSb6 to MSb8) and the data input from the IC card (CD) (bo-b2 at address 23H) to make a judgment #3203), and if they are different (i.e., there has been a change), change the exposure mode. To force P mode, set data (FbO, Fbl) to (0, 0) #3
205), proceed to step (#3210).

Next, in step (#3210), it is determined whether or not there is an H/S mode, and if there is, (bl at address 22H = 1)
To do so, reset the above flag (CHGF) and change the change data (CDbO-CDb2) indicating the change position to H/8 change (
0,0,O) and proceed to step (#3230) (#
3220. #3225).

When there is no H/S mode (bl=o at address 22H)
Then, set the data (FbO, Fb7) to (0, 0) without H/S (#3215) and proceed to step (#3230).

In step (#3230), it is determined whether there is a +/- mode, and if there is (b2 of address 22H = 1),
It is determined in step (#3245) whether the flag (CI (GF)) is set, and if it is set, the flag is reset (#3250), and step (
#3255) to + change data (CDbO-CDbl)
/- Change (001) and proceed to step (#3260).

If the flag (CHGF) is not set in step (#3245), step (#3250), (#
3255) and go directly to step (#3
260).

In step (#3230), if there is no +/- mode (b2 = o at address 228), no correction is made,
The function data (Fb4. Fb5) is set to (0, O), the corrected exposure amount ΔEv is set to 0, and the process proceeds to step (#3260) (#3235. #3240).

In step (#3260), it is determined whether or not there is an S/C mode, and if there is, (b3 of address 22H = 1
), it is determined in step (#3270) whether or not the flag (CHGF) is set, and if it is set, it should be reset (#3275), and then the S/C
Change data (CD) in step (#3280) as a change
Set bO-CDb2) to (0, 1, 0) and proceed to the next step (#3285).

When the flag (CHGF) is not set, steps (#3275) and (#3280) are skipped and the process directly proceeds to step (#3285). Step (#3
260) and there is no S/C mode (address 22H
b3 = O), step (#
3265), the function data (Fb3) is set to (0), and the process proceeds to step (#3285). Step (#3285)
Now, determine whether there is S/A mode or not, and if there is (
b4 = 1 at address 22H has step (#3
295), it is determined whether the flag (CHGF) is set, and if it is set, the flag (CHGF
) (#3300) and proceed to the next step (
#3305), change data (CDbO
~CDb2) as (0, 1, 1) and return. If the flag (CHGF) is not set in the previous step (#3295), there is no mode that can be changed.
3310), change data (CDbO to CDb2) to (1
, 0, 0).

Also, if there is no S/A mode in step (#3285) (b4 = o at address 22H), in step (#329
0), the function data (Fb2) is set to (0) and returned to set the multi-point ranging mode (A mode).

When the display control (#472) described above in FIG. When there is no (IP7= rHJ
), enable interrupts and return ($1474).

When it is turned on (IP7=rLJ'), in step (#475) it is determined whether the self mode is selected by checking whether the self mode selection switch (SSELF) is turned on. If the switch is turned on (IP12=
r L J ), the process advances to step (#478) to process self-photography. This subroutine is shown in FIG.

First, the microcomputer (μC) stops the AF motor in step (#4500). This is because when taking self-shots, the subject may not be present and the background may be in focus, so AF operation is prohibited. (for this reason). Next, internal E2P
A signal indicating a self timer time is read from the ROM (#4505). Next step (#4510)
It is determined whether or not 28 is selected, and here 28 is selected.
)+Z C, wait 2 seconds at step (#4515), return, and proceed to step (#490) in FIG. 6 to perform exposure control (#495).

Similarly, when 58 is selected, 5 seconds, 108
is selected, wait 10 seconds and return to step (#490) in Figure 6 to perform exposure control.
Proceed to (#4520 to #4530).

If it is not the self mode at step (#475) in FIG. 6 (IP12=rHJ) It: Li, proceed to step (#480).

In this step (#480), it is determined whether the manual focus mode [MFF=1 (focus lock or manual focus adjustment with focus detection only)] is selected, and if it is the manual focus mode, step (#49
0) and then proceeds to step (#495) to perform exposure control, and when the mode is not manual focus mode (A mode), proceeds to step (#485).

In step (#485), a flag indicating focus (AFEF
) is set, and if it is not set, returns without performing exposure control.

When the flag (AFEF) is set or when not in AF mode (i.e. in manual mode)
In step (#490), interrupts to this flow are prohibited, and in the next step (#495), exposure control is performed (described later), and in step (#500), the film is wound one frame ( This will also be explained later), release switch (S2
) is ON or not in step (#505), and
(7) If the camera is in continuous shooting mode (IP7-r T-"), it is determined in step (#510) whether or not it is in continuous shooting mode. If it is in continuous shooting mode (Fb3=1), in step (#515) Enable all interrupts and proceed to the [SO] routine. If the continuous shooting mode is not in effect (Fb3-O), 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 enabled in step (#520) and the process returns.

Next, the exposure control subroutine of step (#495) is shown in FIG. 31 and will be described. First step (#280
0), it is determined whether charging is completed or not based on the data input from the flash device (ST), and if charging is completed, the terminal (C3
ST) is set to rH, level during (t2), indicating that it is in exposure mode. Then, the film sensitivity (
Sv), exposure compensation amount (△Ev), and flash light emission amount correction amount (F△Ev) from the IC card are calculated and output after D/A conversion as analog data to the dimming circuit (STC). (#2810).

In the next step (#2815), the control aperture value (Avc
) After performing aperture control and controlling mirror up (#2820), control shutter speed (Tvc)
Control the shutter speed based on (#2825)
Then, the Ful1 light emission signal terminal is set to l'LJ level (#2830), and the process returns.

Here, the operation of the interface circuit when the flash is emitted is explained in the ninth section.
To explain based on Figure (b), during flash photography, the terminal (FLOK) is at the rHJ level, and when the front curtain of the shutter completes travel, the X contact turns ON and a light emission start signal is sent from the AND circuit (AND21). Electronic flash device (ST
), and the electronic flash device ift (ST) inputs this and starts emitting light. When not in the Ful1 light emission mode, "H" level is output to the AND circuit via the inverter (IN21), and the dimming circuit (STC)
When a pulse signal indicating the completion of dimming is input from the AND circuit (AND22), the AND circuit (AND22) outputs this to the flash device via the OR circuit (OR21). In an electronic flash device (ST), input this to stop flash emission. In the Ful1 light emission mode, the AND circuit (AND22) has r L
Since the J level is input and the AND circuit (AND22) is in an inactive state and prohibits the dimming signal from passing through, no signal indicating the stop of flash emission is output to the electronic flash device (ST'').

Figures 32(a) and (b) show the steps (#) in Figure 6.
500) is a flowchart of the control for winding one frame of the film shown in FIG. To explain this, in Fig. 32(a), the microcomputer (μC) outputs a motor hoisting signal to the motor control circuit (MD), and the timer (
T3) reset start sensor f6 (#2850.
#2855).

This timer winds the film to the last frame,
This is a timer to detect when the film is stretched. The microcomputer (μC) switches the switch (SWD) to indicate that one frame has been wound in the step (#2860).
) is ON or not, and if it is not ONI,
It is determined in step (#2865) whether 2 seconds have elapsed in this state, and if 2 seconds have elapsed, the motor is controlled to stop (#2870), and the film is assumed to be taut.
Control this film tension (112875)
, return. The above-mentioned subroutine is the 32nd one.
To explain it as shown in FIG. ~3H18H-B
Hl (where H is a hexadecimal number) gives a motor reversal signal to the motor control circuit (MD) and waits for the film detection switch (SFLM) to be turned on.) (#2930
．． #2935).

Next, when the switch (SFLM) is turned OFF, it is determined whether or not the entire film is rolled into the cartridge chamber, and when it is rolled (MSb9 to MSb12 of E2PROM =
2) 1.3H, 68, 7H, AH, B) I, El (,
FH), wait one second (#2945), perform motor stop control (#2955), and then return.

Unless it is involved (E2PROM MSb9 to M
Sb12=OH, LH, 4H, 58, 8B, 9H,
CH, DH), wait 0.2 seconds, stop the motor, and return (#2950).

No auto-return in the above step (#2920))
When (MSb9~MSb12= 48~7H, CH-F
[() proceeds to step (#2925) and waits for the rewind switch (SWD) to be turned on, and if it is turned on, proceeds to step (#2930).

Returning to FIG. 32(a), when the one-frame winding completion switch (SWD) is turned on in step (#2880), the motor is stopped in step (#2880), and then In the next step ($12885), it is determined whether or not the film number counter is a forward counting type. If it is a forward counting type (MSb9 to MSb12 = OH-7H), the number of film shots taken is counted in the step (#2890). Increment the count number (N1) of the counter shown by 1, and if it is a backward calculation formula (MSb9 to MSb12 = 8
H-FH) contains a count number (
N1) is decremented by 1, and the process proceeds to step (#2900). In step (#2900),
This number of films (N1) is MSb1 of E2 PROM.
3 to write to MSb18.

Next, when the back cover close detection switch (SRC) or the rewind switch (SRW) is operated, the terminal (INT2
), the microcomputer (μC) executes the interrupt [INT2) shown in FIG. 33. In the flow shown in the figure, the microcontroller (μC) first prohibits interrupts to this flow (#3000), and then steps (#3000).
005), it is detected whether the rewind switch (SRW) is turned on. If it is ON, execute the [Rewind] routine shown in FIG. 32(b) to perform the rewind operation, permit interrupts, and return (#30).
10). If the rewind switch (SRW) is not turned on, it is assumed that the back cover closing switch (SRC) is turned on, and the process proceeds to step (#3015), where it is determined whether or not there is a film. If there is no film, therefore, if the film detection switch (S FLM) is OFF,
Proceed to step (#3100) without performing initial loading.

In contrast, if a film is present (i.e. 5FLN
is 0N (7)), set the terminal (C3DX) to "H" level, perform serial communication with the film sensitivity reading circuit (DX), and input the film sensitivity data (Sv) and the number of film exposures (N). , When communication is finished, the terminal (C8D
X) to “L” level (#3020 to #3030)
. And set the number (N1) to -2 #303
5) Next, set the terminal (C3DISP) to "H" level and perform serial communication with the display control circuit (#3045).
Signal indicating initial load (OAH bl=1.
b2 to b6=o) and output the data of the number of films,
As a result, only data indicating the number of films (Nl) is displayed. When serial communication is finished, the terminal (
C8DISP) to r L J level (#3050
). The value of the number of films (N1) is displayed using two 7 segments.

Next, the microcomputer (μC) outputs a signal indicating motor winding to the winding control circuit (#3055), waits for one frame to be wound (#3060), and when the one-frame winding switch (SWD) is turned on, the number of films ( N1) to 1
is added, and it is determined whether or not it becomes 1. If it is not 1, the process returns to step (#3040). If it is 1, proceed to step (#3075) to stop the motor, and further determine in step (#3080) whether or not the film counter is a forward counting type, and if it is a forward counting type,
In step (#3085), set (N1) to 1, and if it is not a forward calculation method, set the number of film shots (N) read in step (#3090) to (N1), and then in step (#3095)
Proceed to. Then, in step (#3095), the number of films (Ml) and the film sensitivity are written to a predetermined address of the E2FROM, and after the writing is completed, all interrupts are enabled (#3100) and the process returns.

It should be added here that in this embodiment, setting and resetting the flag and setting the bits to 1 and 0 are the same.

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

The IC card (CD) has a built-in microcomputer (μC2) with a built-in E2FROM.

First, let's start with the mode setting card.
When D) is attached to the camera, power is supplied and as mentioned above, an interrupt is applied to the camera's microcomputer (μC), a clock (φ) is sent, and the microcomputer (μC2) on the IC card side becomes drivable.

On the IC card side, the terminal (RE) is connected by attaching it to the camera.
A signal changing from "L" to "H" level is input to the microcomputer (μC2), and the microcomputer (μC2) executes the flow shown in FIG. 40(a). In the same figure, the microcontroller (μC2) first resets the flag output port and writes the data in the E2 PROM to R.
It moves to the bit corresponding to the content of the data in the AM bits (#CD10) and waits for an interrupt (#CD15).

A signal from the camera indicating a data communication request (C8BCK)
When this is sent, the microcomputer (μC2) of the IC card executes the interrupt (CINT), which is shown and explained in FIG. 40(b).
Glock (SCK) for data communication sent from the camera.
), input the data from the camera and determine the number of data communication (Ding, ■, m) (#CD
55). In the case of data communication ■, first set data that indicates to the camera what type (mode setting or program) the IC card is (mode setting card in this case), and then use the clock sent from the camera. (SC
It outputs data based on K) (#CD60) and waits for an interrupt (#CD63). If data communication is ■, step (#CD70) to step (#CD75)
, and input the data sent from the camera (key data in this case) in synchronization with the clog (SCK).

Based on this input data, the data set routine (#CD75) is executed and the interrupt wait is performed (#C
D63).

This data set routine is shown in FIG. 40 (C) and will be explained when the card data setting switch (SCDS is
It is determined in step (#CD100) whether or not the switch is ON or OFF, and step (#CD100) is performed depending on whether the switch is ON or OFF.
#CDll0. After each control is performed in #CD105), the process advances to step (#CD115). (5C
The control flow of [5CDSON), (SCDSOFF) is shown in Fig. 40 (8) and (f), but this control flow is similar to that shown in Figs. 17 and 18.
OFF) flow and comparison step ($11500) and step (#1550) for determining the mode setting card (this is not necessary on the card side); the other steps are the same, so the explanation will be omitted.

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

Returning to FIG. 40(c), in step (#CD115), it is determined whether the set flag (C3ETF) is set, and if it is not set, [5CDSO
The flag (CO
DSF) is set or not.
120).

In this example, the card data setting switch (SCDS)
is set to OFF to enter the change mode, and when the flag (C8ETF) is not set in step (#CD115), it indicates that the setting has not been changed yet, but has been changed.

When the flag (CODSF) is set, the display control flag (I) ISPCF) should be set #cD1
25) If the flag (CODSF) is not set, reset it (#CD130) and return.

By setting and resetting this display control flag (DISPCF), it is determined whether or not the camera side display will be the display in the data setting mode [Step (#273 in Figure 28)]
0)). At step (#CD115), the flag (C3E
TF) is set, execute the flow of data set ■ for data change and step (#CI) 1
Proceed to step 25) (#CD117).

Here, the flow according to the operation of the data set ■ will be explained.

In Fig. 40(d), it is determined whether the card switch (S CD) is ON or not (#CD135), ON.
If so, determine the current change mode from the bits that store the change mode (CCkbo-CCkb2), change to the next mode, and return (#C
D140).

At this time, the above bits (CCkb15 to CCkb17)
Also change the data. When the switch (SCD) is not turned on, determine whether the up switch or down switch is turned on #CD145. #CD
155), if these switches are ON, execute the flows of data sets (2) and (2), respectively, and return (#CD150, #C0160). If both are not turned on, return without doing anything.

Next, the data set ■ is shown in Figure 40 (g), and to explain it, first, the microcomputer (μC) has a change mode of (■) ~
The bit (CCkb3 to
CCkb22), the current number is determined and changed to the next number. For example, in mode I, the current number is r
OJ (H/S, exposure compensation, drive mode S/C
(4 changes of 1-spot AF/multi-point AF are possible), rlJ (among the 4, spot/multi-point AF cannot be changed). Data set (2) is almost the same as data set (2) above, and the only difference is that the number progression is reversed, so it is not shown.

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

In this embodiment, the program card is a sports program that is effective when a user wants to take a picture of a sports scene being played.

Now, when the IC card is inserted into the camera, a signal that changes from "L" level to r) (J level is input to the RESET terminal of the microcontroller (μC2) on the card side, and the microcontroller (μC2) The flow of [reset] shown in FIG. 41 is executed, the flag and vote are reset in step (Ql), and an interrupt is waited for (Q2).

When the C3BCK signal is input from the camera, an interrupt is generated and the flow shown in FIG. 42 (CINT) is executed.

The microcontroller (μC2) of the IC card performs data communication based on the clock (SCK) sent from the camera (
Q5's. The data at this time is data used by the camera to inform the card side of the type of communication.
The microcomputer (μC2) of the card inputs this data and determines the content of the communication (Q51). If it is a data communication device, it serially communicates data indicating the type of card (in this case, it is a program card), data indicating that the AF mode is continuous, and the metering zone is multi-point, to the camera side. (Q52) outputs,
The process advances to step (056) and waits for an interrupt.

This program card is designed for sports scenes, so continuous AF, which is always in focus, is used to capture rapidly moving subjects.
For the same reason, the metering zone has a wide metering range with multiple points, and the distance metering zone focuses on a moving subject, so a wide multipoint is desirable, but if the photographer wishes to sharply focus only on the main subject. Consider this and make it possible to switch.

If it is data communication (2), data necessary for exposure calculation is input from the camera (steps Q53 and Q54). Then, it performs exposure calculation and waits for an interrupt (Q55).

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

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

〔control〕

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

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

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
) to speed up the aperture. Therefore, A
v=(3/4) - Perform the calculation of Ev -23/4.

When Ev≧21, the shutter speed (Tv) is already considered to be sufficiently fast, so in order to change both (Av) and (Tv) smoothly, Av = (1/2).
・Calculate Ev-1/2.

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

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

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

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

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

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

(c) Others The above control is performed when a lens with a focal length of 70 m11 or more is attached. The reason for this is that sports photography requires a relatively long distance from the subject, so it is thought that a telephoto lens will not be able to sufficiently photograph the subject, and if a telephoto lens is not used, the image magnification of the subject will be small. Shiba: I don't use controls because I move the lens to follow the subject and there is little chance of camera shake.

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

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

Next, a flowchart of the exposure calculation of the program card is shown in FIG. 43 and will be explained. In the figure, the microcomputer of the program card first determines the presence or absence of a lens based on the data input in step (3). Here, if the lens is not attached to the camera body, lens data such as the maximum aperture value (Av, ) will not be sent to the IC card. Therefore, since exposure calculation cannot be performed, proceed to step (3) and leave exposure control to the camera body. If the lens is attached, proceed to step (3) and check the focal length of the lens from the input data. Focal length is 70n
For a lens without a uu groove, card control is not performed for the reason mentioned above, so in this case as well, jump to step 2 and leave exposure control to the camera body.

If the focusing distance is 70+n+* or more, check the state of the forced flash light switch from the data input in step (2). When the flash forced light emission switch is ON, the card does not perform control for the reason described above, and therefore jumps to step [phase].

On the other hand, if the switch is OFF, proceed to the next step ■
The exposure value (Ev) is calculated by the sum of the spot brightness (Bvs) and the film sensitivity (Sv) of the input data. Then, the content of the control is changed depending on the value of the exposure value (Ev). For the reasons mentioned above, when Ev<21, Av=
(3/4) ・Step ■ from the equation of Ev -23/4
Find (Av). When Ev≧21, Av= (1/
2) ・From the equation of Ev -1/2, use step ■ to calculate (Av)
seek.

The minimum aperture value of the lens (Av) calculated in step ■
A comparison with Av□X) is performed in the next step ■. and,
When Av≧Avaax, the lens cannot be stopped down any further, so in step (2), the body control aperture value Avc is set to AVmax.

On the other hand, when Av< AV++ l x, step ■
Let Avc = Av. After determining the body control aperture value Avc in this manner, the shutter speed (Tv) is calculated in step [phase] based on the formula Tv=Ev-Avc.

In the next step ■, this shutter speed (Tv) is compared with the camera's maximum shutter speed (Tvmsj).Here, if TV≧TVsax, proceed to step @ and set the shutter speed for body control (Tvc). (TVm
s8). Tv (When Tvssx, set Tvc = Tv in step @.

If Ev<21 in step (2) above, calculate (Av) using the formula shown in step (2), and then proceed to step (2).

In step (2), (Av) calculated in step (2) is compared with the open aperture AV6. Here, when Av > Avo, go to step ① to compare (Av) and (Avsa.). When AV≦Avo, the aperture value of the lens cannot be opened any further, so step Proceed to [Phase] and set the body control aperture value (Avc) to (Av, ).

Further, in step O, the shutter speed (Tv) is calculated from the formula Tv=Ev-Avc.

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

As a result, in the case of a reversal (positive) film, the process proceeds to step (2) to prevent the shutter speed (Tv) from becoming extremely slow.

On the other hand, in the case of negative film, proceed to step [phase],
It is determined whether the shutter speed (Tv) is smaller than 9 or not. When Tv≧9, the body control shutter speed (Tvc) is set to (Tv) in step (2). Tv<9
If so, proceed to step [phase] and further determine whether the shutter speed (Tv) is 8 or higher.

Here, when TV≧8, Tvc = 9 and step [phase]), and when Tv<8, step
A correction of v+1 is performed and the process proceeds to the next step (2). In step (2), a comparison is made to limit the maximum value of (Tv) to Tv--5 (30 seconds) in order to prevent the shutter speed (Tv) from becoming extremely slow.

Here, when Tv<-5, Tvc is set to -5 (Step 2), and when Tv≧-5, Tvc is set to Tv (Step [Phase]).

Since the flash is not controlled for the reason mentioned above, in step (2), a bit is set to turn off the flash.

After that, the process proceeds to step (3), the camera control uses the value calculated by the program card, and returns.

When the flow of these exposure calculations is completed, the process returns to the flow of FIG. 42 and waits for an interrupt.

At this point, there is an interrupt from the camera side, and at this time, if the data communication is ■, the data of the calculated aperture value (CAvc) and shutter speed (CTvc) and whether or not to perform camera control using the card, and non-forced Full 1 emission (Fb9 = O)
.

Prohibition of forced flash (FblO=O), flash control correction amount (CF
Data regarding the reset of ΔEv) is created, serial communication is performed, and data is output to the camera side. Note that the microcomputer (μC2) of the card stops during communications other than those described above.

Here, the switches, their functions, various data, etc. that appear in the explanation of this embodiment are shown in Tables 1 to 12 below.

Table 1 Table (continued) Table (b) Table (a) Table (c) Table (d) Table (e) Table Mode setting data (MSbn) IC2PROM Table Functional data (Fbn) AM Table (Continued) Table Change Data (CDbn) (RAM) Table Card Communication Output Data (C3bn Table (Continued) Table Data from Cards Table (a) Table (b) Table (b) ( (Continued) Table (b) (Continued) Table Data Display RAM (Register) Table (Continued) Table Lens (II) Table Lens (I) Table Lens Information in Camera In this example, Table 2 As shown in (C), the function of changing the AF mode when operating the lens switch (SQ) can be selected using the IC card (CD). Bit M S b of E2PROM is transmitted through data communication when installed.
26, MSb27 (Table 4).

In the AF mode determination routine (Fig. 6), when the lens switch (SQ) is pressed, the process proceeds to step #4005 and subsequent steps to determine whether the function selected by the card is the focus lock mode (step #4010) or the spot Whether it is AF or multi-point AF mode (step #4035), whether it is continuous AF or one-shot AF mode (step #4045)
, bit MSb 26, MSb of E2 FROM
The determination is made by checking the contents of 27.

Then, according to each setting AF mode, the function data bit F
Set b2, Fb8, etc. to values corresponding to the mode (Table 3).

Therefore, when the switch (Sl) is pressed and AF control is executed (Steps #427 and #429 in FIG. 6), the AF
In the control routine (FIG. 10(a)), AF control is performed according to the mode based on the contents of function data bits Fb2 and Fb8.

In the present invention, even when the S1 switch is operated and AF operation is being performed, the AF operation mode can be changed by operating the switch on the lens side. There is no need for troublesome operations such as once exiting the AF operation. Further, when the AF operation is not in progress, the AF mode is not changed in any way even if the lens side switch is operated, so malfunctions can be prevented.

[Brief explanation of the drawing]

The figures all relate to embodiments of the present invention, in which Figure 1 is a circuit block diagram of the entire camera, Figures 2(a) to 2(v) are diagrams showing the display form on the display section, FIG. 3 is a flowchart showing a camera reset routine when a battery is installed. FIG. 4 is a flowchart showing the initial set routine in FIG. 5(a) to 5(C) are flowcharts of data communication performed between a camera and an IC card attached thereto. FIG. 6 is a flowchart showing a routine for photometry, AF, display, exposure control, etc., FIG. 6(a) is a detailed view of a part of it, and FIG. 7 is a flowchart showing a routine for inputting lens data, FIG. 8 is also a flowchart 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 its interface. Figure 10(a) is a flowchart of the AF cylinder, and Figures 10(b) to 10(f)
is a detailed diagram. FIG. 11 is a diagram showing the distance measurement range and photometry range within the photographic screen. FIG. 12 is a flowchart showing the setting routine of the keys provided on the camera, and FIGS. 13, 14(a), and 14(b)
, FIG. 15, FIG. 16, FIG. 17, and FIG. 18 are flowcharts showing specific setting routines related to the various keys. FIG. 19 is a flowchart showing the photometric data creation routine, and FIG. 20 is a flowchart of the AE flow. FIGS. 21(a) and 21(b) are flowcharts for setting the aperture and shutter speed. FIG. 22 is a flowchart of exposure calculation, and FIGS. 23(a) to 23(c), 24, 25, and 2
FIG. 6 is a flowchart of each mode. Second
FIG. 7 is a flowchart of control by an IC card (particularly a program card). FIG. 28 is a flowchart showing the display routine, and FIG. 29 is a flowchart showing the self routine. Figure 30 is a flowchart for mode setting, Figure 31 is a flowchart for exposure control, Figures 32(a) and 32(b) are for film 1.
FIG. 33 is a flow chart showing an interrupt routine related to closing the camera back. Figures 34(a) to 34(e) and 35(a)
), FIG. 35(b) is a diagram showing a display example. FIG. 36 is a circuit diagram inside the lens, and FIG. 37 is an external view of the lens. FIG. 38 shows an example of the display on the infinder, and FIG. 39 shows an example of the display on the body display. Figures 40(a) to 40(h) are flowcharts showing various routines for IC cards, Figures 41 and 42 are flowcharts particularly for program cards, and Figure 43 is a flowchart for exposure calculation. , FIG. 44 is a program diagram regarding the program card. FIG. 45 is a diagram corresponding to claims of the present application. (μC) (μC2) (CD) (SQ) (Sl) Microcomputer IC card lens side switch Lens AF start switch of the microcomputer IC card in the camera body.

Claims (4)

[Claims] (1) In a camera system having a function of selectively operating in two types of modes, the first operating means provided on the camera body, the second operating means provided on the lens unit, and the first operating means are operated. When the second operating means is also operated while the first operating means is being operated, the function is operated in a predetermined one of the two modes. A camera system comprising: a control means for operating the camera in the mode. (2) The camera system according to claim 1, wherein the function is an automatic focusing function, and the first operating means is incorporated in a shutter release button. (3) The two modes are a mode in which automatic focusing is performed only within a narrow range within the field of view, and a mode in which automatic focusing is performed within a wide range within the field of view.
Camera system as described. (4) The above two modes are one in which the lens stops driving once the subject is in focus, and the other in which the lens is driven so that the subject continues to be in focus even after the subject is in focus. 3. The camera system according to claim 2, wherein the camera system is in a mode.