JPH0242430A - Camera system - Google Patents

Abstract

PURPOSE:To simplify display and to improve visibility by displaying two similar types of operating modes by using one and the same display. CONSTITUTION:A display showing that a moving body follow-up focusing function is operating and a display showing a continuous automatic focusing mode are displayed with one and the same display. That is to say, the moving body follow-up focusing function detects whether an object is moving or not, when it is moving, the function follows it and focuses on it and the continuous automatic focusing mode drives a lens so that the object is always in focus. Consequently, these two functions or modes are in common in respect of following the moving object and therefore, the displays can be made the same. Thus, the display can be simplified without confusing an operator.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera system, and more particularly to an automatic focus control display thereof.

The automatic focus control (AF) function that drives the lens so that the subject is properly focused is already known, but this A
Various operating modes are also considered for the F function. For example, there is a one-shot AF mode that stops the lens from driving once the subject is in focus (in focus); There is a continuous AF mode that continues to drive the lens.

On the other hand, a moving object tracking focus adjustment function that uses the AF function is also being considered, and this determines the movement of the object by determining whether or not the object continues to be in focus even after the object is in focus. If you are still focused,
The subject is considered to be stationary; conversely, if the focus shifts by a predetermined amount or more after it is once in focus, the subject is considered to be moving. ), this function focuses on a moving subject based on that determination.

It is common practice to display information necessary for shooting, such as the operating status of the camera system, on a display installed in the camera body or viewfinder, but traditionally, each function was not displayed separately. Ta.

However, when the functions of other camera systems increase and the number of items to be displayed on the display increases, there is a problem that an excessively large number of items and a complicated display may obscure important information.

The present invention solves these problems and provides a camera system that provides the necessary information while simplifying the display and improving visibility.

In order to achieve the above object, the camera system of the present invention includes a display device that displays the operating status of the camera, predicts the movement of the subject based on the results of multiple focus detections, and In a camera system that has a moving object tracking focus adjustment function that drives the lens so that the object is in focus, and a continuous automatic focus mode that drives the lens so that the object continues to be in focus even after the object is in focus, The present invention is characterized in that a display indicating that the moving object tracking focus adjustment function is in operation and a display indicating that the continuous automatic focus mode is in operation are performed on the same display on the display device.

Note that the camera system operates in the continuous autofocus mode;
If the autofocus mode can be selected between a one-shot autofocus mode in which the lens is not driven once the subject is in focus, the moving object tracking focus adjustment function
One-shot autofocus mode is selected, and
It is best to operate once the subject is in focus.

Further, the selected autofocus mode may be displayed on the display device.

It is convenient to be able to select the autofocus mode using a switch provided on the lens side.

By installing a display device inside the camera's viewfinder,
The effects of the present invention will be even more remarkable.

Present-1- The moving object tracking focus adjustment function detects whether or not the object is moving, and if it is moving, attempts to follow it and focus (drives the lens). Furthermore, in continuous autofocus mode, the lens is driven so that the subject is always in focus. Therefore, since these two functions or modes share the same feature of chasing a moving subject, by making the display the same,
The display can be simplified without confusing the operator.

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 E2FROM, 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 the display section (DISP+) on the top of the camera body and the display section (DISP eye) 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, (IP) 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, (DI) is the diode for backflow prevention, and (ceu) is the backup capacitor for the microcomputer (μC), which has a large capacity. (R11) (CI is equipped with a microcomputer (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.When the battery is installed and the switch (SRE) is turned off, the microcomputer (μC) A signal changing from rlJ level to rH' level is applied to the terminal (RE), and the microcomputer (
μC) will execute a reset routine to be described later. (SEM) is a normally open exposure mode change switch, and the exposure mode is changed by operating this switch (SEM) and the up switch (Sup) and down switch (Sdn) 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).

(S CD5) is a normally open card data setting switch that is operated when changing the mode setting or setting data necessary for the function when a mode setting card or function card (program card) is installed. be.

(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)
If one switch among (S FUN) (S CD) (8CD5) (S o) is turned on, the microcomputer (μC)
executes the interrupt flow (INTI) in FIG. 3, which will be described later. (Sl) is an AF switch that starts the AF operation, and is turned on by pressing the first stroke of the release button.
becomes. (S2) is a release switch that is operated when performing a photographing operation, and is turned on when the second stroke (deeper than the first stroke) of the release button is pressed. (SWD
) is a single-frame switch that is turned ON when one frame of film is wound. (SAEL) is a switch for performing AE lock (exposure lock), and is composed of a normally open bush switch. (SAF/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. (S Av) 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 which turns ON when the back cover is closed and turns OFF when 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 OFF when the back cover is opened.
F. (SCR) is an IC card installation switch that turns OFF when an IC card (CD) is installed.
When the IC card (CD) is turned off, the microcomputer (
μC2) is reset. (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.

(S up) 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 (3Av) and turn on the aperture change switch (3Av).
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, due to the function change using an IC card, which will be described later, turning the aperture change switch (SAv) OFF changes the aperture, and turning the aperture change switch (SAv) ON changes the shutter speed. up switch
), 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 AE amount related function (iv) Choice between two functions (V) Relationship based on operation of a switch on the lens side, etc.

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 prepared as shown in FIG. 2(b) out of all the display contents shown in FIG. 2(a). In FIG. 2(b), the functions (a-1) to (a-4) mentioned above correspond from the left side to the top.

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 continuous shooting/single shooting and spot AF/multi-point AF are always selected even if one function (for example, continuous shooting) cannot be switched. 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, use the numbers "o" to "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/S function only and without 9
[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 possible combinations shown in the table on the next page.
Among the four modes shown in Fig. 2 (m) (however, PROGRAM is represented by P), when setting the mode, the selected combination is displayed as shown in Fig. 2 (n).
The exposure mode selected at the time of photographing is displayed as shown in FIG. 2(o) (A mode selection).

Incidentally, in the P mode, PROGRAM is displayed [Fig. 2 (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 17ZEv.

(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,
When used together with the operation (ie, ON) of the aperture change switch (SAv), the mode (hereinafter referred to as rM1 mode) in which the aperture value is changed 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 (Continuous AF may be selected) ■When the switch is operated (E-2) Focus lock (E-3) Spot AF (E-4) Continuous AP It is displayed as shown in Figure 2 (r).

In the same figure, rF-2J 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 attached. 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.

(II) 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 places 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 “
When 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 (φ).

The microcomputer (μC) is shown in Figure 3.
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 [Lj 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.
#110). This allows you to set the exposure mode to P mode, spot/multi-point AF to multi-point AF mode, single shooting (S)/continuous shooting (C).
) with single shooting (S), exposure compensation, highlight ()/shadow (S) mode, and one-shot AF
, Full1 non-flash mode, forced non-flash mode, and multi-point photometry mode are set. The contents of this function data are
Shown in the table.

Next, it is detected whether the mode setting card of the two types of IC cards described above has been installed at least once and the mode setting has already been performed by checking the contents of the E2FROM (the contents of MSb4, which will be described later). If the setting method is not correct, interrupts other than those caused by inserting an IC card (CDINT) are prohibited and the process returns (#135, #14.
O). If using the mode setting method, the contents of g2PROM (MSbO to MSb described later) can be used to determine which mode is set.
3) and determine the part where the changed data will be displayed. Highlight/Shadow mode (H/S mode)
, exposure compensation mode (10/- mode), single shooting/continuous shooting switching mode (S/C mode), and spot/multi-point AF switching mode (S/A mode). If set, change data for the first mode set is set (#145 to #1
82), RAM change data and E2PROM setting mode data are shown in Tables 4 and 5. Note that the steps (#145 to #71182) 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 (C8DISP) to r HJ level,
Inform the display control circuit (DISPC) of data communication, create data (see Table 9), and perform serial communication.
When data transfer is completed, terminal (C:5DISP) is set to “L”.
” level, and the display control circuit (DI
SPC) (#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 the 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 are shutter speed [:1000] and aperture value C5, 6L.
AE mode (PROGRAM), number of films (with or without film) [17], focus mode (ONE 5)
HOT AF) and function mode (shape shown on the bottom line) are displayed. 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 (03) (), and bits bo to b of address (04H).
Presence/absence of mode setting by IC card (CD) of 7, bits b4 to b7 of address (08H), bits bo to b7 of (091()) by IC card (CD) (iv)
The selection number set in the change mode of (vii) is read from the E2FROM and set in each address.

Also, the data for data change display (address 05B).

~ b2), when the battery is installed (OAH b4 = 1) (OA) (
b1 to b3. b5, b6=o) are set at their respective addresses. The display control circuit (DISPC) receives the signal indicating that the battery is installed, and changes the data shown in Figs. 34(a) to 34(e) at 0.5 second intervals according to the function data set in the E2FROM. The display unit (DISP+
) to drive.

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,
E2 Number of films stored in PROM 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 (#210).
).

The subroutine of this card data communication I is shown in FIG. 5(a).
Shown below. In the same figure, first, a terminal (C8CD) is used to inform the IC card (CD) of communication with the IC card (CD).
) is set to "H" level, and the data output mode is set and data indicating data communication (see Table 6) is sent to the IC card by serial transfer (#300 and #305).

A microcomputer (μC) takes a certain amount of time to input this information on the IC card (CD) side, create the necessary data, and output it.
) waits (#31. Then, this time, data is sent from the IC card (CD), so it operates in input mode, and the I
Perform serial transfer with C card (CD) (#315),
When this is completed, the terminal (C3CD) is set to "L" 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 function data indicating which one of continuous shooting/single shooting is the other, or whether there is no particular specification (setting by the photographer) is included, it is next determined whether the card function is selected ( #322). Card function is selected (CDF
When NF=1), the function data Fb2. Fb3゜F
b8. Rewrite the bit of Fb12 to set the data #323) and 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) to determine whether or not the IC card is installed, and if it is not installed (bo = O in 20H)
returns without displaying the type of IC card.

When an IC card is installed (20H bo = 1), the type of IC card is determined and the mode setting card (20H
If H bl = 1), create the display data for this IC card (08H bo = O) #230), and if the program card (20H bl = 0), create the display data for the program (08H bo = 1) Create (#245)
.

In addition, the card function 0N (04H bo = 1), the control signal ``0AH = 0.0, 0, 1, 0, 0, 0.OJ (bO
As part of ~b7), all display data is output 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 (
SFIJH), card function enable/disable switch (SCD
) Card data setting switch (SCI) S) and photometry switch (So) are turned ON or not is determined by the level of the terminal (IF5) in step (#10), and if any of the above switches is +JON. If not (IP5 = rHJ), the battery installation flag (B
ATI') is set or not.
15), and if it is set, it is assumed that this step has been reached without doing anything after the battery is installed, and step (
The process jumps to step #45) and controls turning off the display and stopping the IC card (CD) according to the flow from step (#45) onwards.

First, the display data is 0AH = 0.0.1゜o,
o, o, o, o, and outputs this data to the display control circuit (DISPC) (#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 csbo and csbi both being 1, as shown in Table 6.

After that, the transistor (Tri) is turned off by setting the terminal (pw) to "L", 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 stop (l(ALT)) also stops the oscillation of the built-in clock.

In the above step (#10), the five Sui Sochi (
S EM), (S FUN), (S CD), (
If one of S CD5) and (S o) is ON, proceed to step (#91), reset the flag (BATF) indicating when the battery is installed, and proceed to the next step (
#92) sets the flag (OFF) indicating that one of the five switches mentioned above has been operated, and returns to routine I.
:SO) is executed L (#93) and returns 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), when none of the above five switches are turned on and the battery is not installed (BATF=0), - degree routine [set when passing through SCD] Determine whether the flag (OPF) is set (#15, #25). When this flag is set, the timer (T
1) Reset start and reset the flag (OPF) (#30.#35). Here, the timer (T1)
To reset and start (#30), the routine (#93) has been passed through the -degree step (#10), (#91), (#92), and currently none of the five switches are pressed. Although not, this is to extend the power retention for a certain period of time in consideration of the possibility of being turned on again, and the flag (OFF) is reset (#35)
This is to show that step (#30) has passed.

In step (#25), if the flag (OPF) is not set, step (#30) (#3
Skip step 5) and detect whether 10 seconds have passed for the reset-started timer described above #40), 10
If seconds have elapsed, proceed to steps after (#45) to turn off the display and stop the IC card (CD). 1
If 0 seconds have not elapsed, step (#93) is entered and the [SCD routine is repeated.

Next, we will explain how to control the camera when an IC card (CD) is inserted.
A signal that changes from r]=J level to "H" level is input to NT), and the interrupt routine (CDINT) shown in FIG. 4 is executed. Then, when entering this routine, the microcomputer (μC) sets a flag (OPF) to stop lens drive and maintain power supply (#290. #292).
. Next, in order to give top priority to displaying the type of installed card, all other interruptions to this flow are prohibited in step (#295), and the process proceeds to step ($1210) and subsequent steps, and as described above, After displaying the type for a certain period of time as shown in Fig. 35 (a) or (b), a flag (CDFNF) is set to forcibly add the card function, and all interrupts are permitted, and the original flow [ Step (#10) in Figure 3: Return. switch (SEM), (SFtlN), with its interrupts enabled;
When any one of (SCD), (SCDS), and (So) is turned ON and a signal that transitions from "H" level to "L" level is input to the interrupt terminal (INTI), the signal shown in Fig. 3 It enters the interrupt [:lNT1] operation and executes the flow after step (#91).

In addition, in the state of halt (HALT) L, any interrupt (INTI) (INT2) or (COINT)
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 [SO] will be explained with reference to FIG.

First, interrupts of (INTII) for this flow are prohibited (#400). This is because if the interrupt [:INTl] in FIG. 3 occurs during this control, the control operation will not proceed further. Next, (#405) the microcontroller (μ
Set the terminal (pw) of C) to “H” level and turn on the inverter (
By applying a low level to the base of the PNP transistor (Tri) through the INI), the transistor (Tri) is set to OWL, the photometry circuit (LM), and the photometry circuit (LM).
Input information specific to the interchangeable lens from the primary lens circuit (LE) that supplies power to the circuit (AFct), etc. (#41
0). This is shown in Fig. 7 and explained. First, the terminal (C
8LE) is set to the "H" level (#600), and serial communication is performed to input information from the lens (#605). FIG. 36 shows the circuit inside the lens and will explain it. A decoder (2) counts the clock input from the camera and creates an address signal. At this time, when the predetermined address is reached, the lens data that changes depending on the zoom,
Or, because the lens data changes depending on the distance,
The encoders (3) and (4) detect the focal length and distance, and the address circuit (5) changes the address depending on the focal length or distance, and outputs predetermined data to the camera body. I'll do what I do. The switch (SQ) is a lens-side switch (see FIG. 37) provided on the lens (10), and since it is also necessary to change the data, the address is changed. The address thus set is output to the ROM. 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, the lens's open aperture value (Avo), the lens's maximum aperture value (Avn^×), distance information, focal length information, ( Conversion coefficient (lens drive amount/defocus amount), ON of the above lens side switch (SQ), 0LIF1 indicates whether or not to drive the lens (LOK), etc., and the RAM at the address in the body shown in the table. is input.

Although the signal (L OK) is not particularly relevant to the camera body of this embodiment, the address is switched when the state becomes such that AF cannot be performed, and the signal changes from "1" to rQJ accordingly. "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, lens information has been relatively small, and a plurality of types of lens information with the same function can be stored in one ROM, and the lens information can be 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 that indicates whether the switch is ON or OFF means that the switch is ON in the ROM.

The data will be changed by changing the address depending on the OFF status, which means that an additional 2 bytes (ON, 0FF) are required. If there is enough ROM for each type, add 2 bytes 068.08H as shown in Table 11 and change the address according to the OFF/ON of the lens side switch (SQ) to 06H, 081( However, if there is no such margin, as shown in Table 10, R
Switch ON and OFF to OM [(B) in this example]
This can be done by keeping the data the same except for the data changed by , and selecting (A) or (B) depending on whether the switch is OFF or ON. However, in this case, the types of lenses that can be used with this ROM are reduced. Now, if the lens side switch (SQ) is OFF, 06H and 07H
1 Conversely, in the case of ON, 16H and 17H (bO = O, A
F motor stop) is now sent. Note that (XXX) in the address indicates address data that changes depending on zoom or distance, and is input from encoders (3) and (4).

The signal (LOK) in the lens indicates that the lens is not for AF. Upon receiving this signal, the camera body 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 macro mode, and LOK is set to prohibit AF operation for such lenses.

-〇 (this can be done by changing the address or switching the ROM), and when not in tuna mode, bO of LOK is set to 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. In order to execute this, when the switch (3Q) is turned on, the value is A in Table 10 and 08H in Table 11.

09H1 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) to “L” level and return ($1610)
.

Returning to FIG. 6, the microcomputer (μC) continues to input electronic flash device information from the electronic flash device (ST) (11
415). The information includes three types of information: a guide number (GN) indicating the amount of light emitted, and whether the battery is fully charged, 9 forced light emission, or automatic light emission (this will be described later). Here, the operation of the information communication method will be explained. In addition, FIG. 9(a) shows the electronic flash device (ST), and FIG. 9(b) shows the interface (IF).
) are shown in their respective circuit diagrams.

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 response to the clock from the microcomputer (μC).

In the interface circuit (IF) shown in FIG. 9(b), the signal from the terminal (C3ST) of the microcomputer (μC) is passed through the OR circuit (OR21) to the terminal (S'rl) of the electronic flash device.
). At this time, the signals input to the OR circuit (OR21) are both at rI and J levels. In the electronic flash device (ST), the signal from the terminal (STI) is input to the AND circuit (ANDll), so the AND circuit (ANDII) is in the active state.
:) is output to the counter (CNT12). The counter counts this and measures the time (tl). When the time (tl) is measured, the terminal (T1) is
"H" level and set the RS flip-flop (SRII). At this time, the RS flip-flop (SR12
) remains reset, and its output port is at the "H" level. Therefore, the AND circuit (AND12) becomes active.

Next, the microcontroller (μC) uses a serial communication clock (
SCK). This clock (SGK) 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 clog (
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) and a signal 1 indicating a charging completion state in synchronization with the clock, a signal indicating forced light emission or automatic light emission.

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 (O8II) 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 Glocks.

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).
and then read the information from the E2PROM.
It is determined in step (#4010) whether the AF mode set by the C card is the focus lock mode. Here, if the focus lock mode is selected (MSb26.27=1.1), a bit indicating this (F
b14) and reset the bit (Fb13) indicating the auxiliary light mode, and if the tracking mode display is on, it is turned off (#4020 to #4
030).

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
), 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 (SQONF) is set, step (194037) is skipped and the process proceeds to step (#4Q4Q). Step (#4040
), the bit (Fb2) indicating spot AF is set, and in order to display this mode, the multi-point/spot display flag is set in step (#4042) regardless of the IC card selection, and the multi-point/spot display flag is set in step (#4042). 4045).

If it is not spot AF in step (#4035), skip steps (#4036 to #4042) and proceed to step (#4 (145).Step (#4
045), it is determined whether or not it is continuous AF, and if it is continuous AF (MSb2B,
27=1. O), the bit indicating this (Fb8=1) should be set #4050), the bit indicating the 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. If it is not continuous AF in step ($14045), proceed to step (#4057), set the flag (SQONF), and return. Since only one of lock, spot AF, and continuous AF is set, for example, if step (#4010) is focus lock, step (#4035) and (#4045) are set. In both cases, the answer is No.

If the switch (SQ) on the lens side is OFF in the above step (#4000''), the process proceeds 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 before the switch (SQ) was turned ON is determined. Step (
#4064) changes the contents of bit (Fb15) to bit (Fb15).
Move to b2). If the switch (SQ) has not changed from ON to OFF (SQONF=0), the switch (SQ)
Assuming that this flow is passed while Q) is OFF, 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 (11406
Step 5) to set the multi-point/spot display flag. Next, in step (#4067) it is determined whether it is spot AF, and if it is spot AF, the bit (Fb2) indicating this is set in step (#4070), and the AF
If it is not a spot, reset this bit (Fb2) in step (#4075) (that is, set it to multi-point AF)
, respectively proceed to step (#4080). Step (
In #4080), it is determined whether there is either one-shot AF/continuous AF setting, and if there is not, proceed to step (#4090) and set Fb8=O (one-shot AF) to step (#4097). Proceed to. 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 the microcomputer (μC) determines the AF mode described above, it performs card data communication with the IC card (CD) in order 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 or not (#425), and if it is not set, press the AF start switch (
SL) is turned on or not based on the level of the terminal (H'6) (#427). The above switch (Sl
) is turned on (IP6-“L” level), A
Control F (#429). On the other hand, when the flag (SETF) indicating the data setting mode is set or when the switch (Sl) is 0FF (IP6 = "H" level), the AF drive motor is turned off to prohibit AF operation. Output a signal to the lens control circuit (LECN) to stop lens drive #431), and set a flag (AFNF) indicating that AF is not being performed #4
35), and further resets the flag (SIONF) indicating ON of the switch (Sl) (#437). When the data setting mode is set in this way, AF control is prohibited and data setting is prioritized, so even if the AF start switch (Sl) is pressed by mistake during data setting, AF operation will not be performed. That's what I do.

Here, regarding the above-mentioned AF control, FIGS. 10(a) to 1
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 (SIONF) 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 based on the input signal from the lens (#705), and if the lens is not attached in step (#705), A
A flag (AFNF) indicating that F is not performed is set and the process returns (#80).

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 (#7
98), disable the auxiliary light mode (Fb13=■, and execute the manual focus subroutine (MFOCUSIe) in the next step (#799), then set the flag (AFNF) indicating that AF is not being performed. (#
800), the process proceeds to step (#780) and it is determined whether or not focus is achieved. If it is in focus, set the flag (AFEF),
If it 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. performs integration without emitting auxiliary light, dumps data after completion of integration, and returns (#4150. #4155. #41
65. #417. When the focus is not detectable and the auxiliary light mode is activated, the light is emitted before the start of integration.
In order to emit light for a certain period of time, the terminal (OLD) is set to "H" level for a certain period of time and integration is performed (#4150 to #41
70).

Returning to FIG. 10(a), as a result of the determination in steps (11710) and (#711), if focus lock is selected in the AF mode, step ($1712)
to stop the lens drive, and check whether the lens is in focus by checking the flag (A).
FEF) is set ($713),
When set, step (#714)
Proceed to step (178) to control the M focus.
Proceed to 0).

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.

After the AP is determined in step (#710) of FIG. 10(a) and the focus is locked in the next step (#711), a flag (AFNF ), and at the same time, a flag (MFF) indicating manual focus is reset in step (#717). 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 or not spot AF is used (detected by Fb2 of the function data).
If (Fb2=1), the process proceeds to step (#735) and executes the spot AF subroutine shown in FIG. 10(d). In this subroutine, a flag (AF
2F), calculate the day focus amount (DF2) of the second island from the input data, and use this as the day focus amount for lens driving (#4102 to #411
0).

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. , the above flag (
AFIF - AF3F) and return (#
810~#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 auxiliary light mode, and if it was in 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), and step (#75
Proceed to 5).

Next, if the microcomputer (μC) is not unable to detect the focus,
Reset the flag (LCONF) (#762), and check whether or not focus is achieved based on the day focus amount for lens drive (
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 focus at step ($1765), the process proceeds to step (#775), executes a subroutine for lens drive control, and then returns. This subroutine is the 10th subroutine.
The explanation shown in Figure (e) is one-shot AF (once focus is achieved, subsequent lens driving is stopped, and focus detection may also be stopped at this time), continuous AF (
(Fb8)
(#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 (
#4327), (#4330) and step (#4
The process proceeds to step 340), where the lens drive is controlled. Step (
In step (#4327), the flag (AFEF) indicating focus is reset, and in step (#4330), the lens driving amount (LN) is calculated by multiplying the day focus amount (DF) by the value. #4340) to drive the lens and return. Note that this step (#43
The lens drive in 40) is performed by the lens drive circuit (LECN).
is performed by driving the lens by a value corresponding to the driving amount (LN).

In step (114255), 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 if there are any. 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 set the same register (DPI) as
The obtained day focus amount (DF) is memorized (#42
70), set the variable (N) to 0 $14275),
Reset the above (AFEIF) (#4280) and return. In step (#4260), after focusing (AFEF 1), when performing the second and subsequent focus detection (
AFEIF=O), proceed to step (#4285), and sequentially memorize the day focus amount 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) into the register (DF2), and the obtained day focus amount (DF)
[Memorize in the register (DPI)] Add 1 to the variable (N), determine if this (N) is 2 or more, that is, focus detection has been performed 3 times after focusing, and if it is within 2 times, lens drive Returns without performing (#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 has been determined in the past three focus detections whether the subject is moving at a predetermined speed (on the image plane). 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 set based on F), the green LED lights up, and otherwise (focus F=0) 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 (#440).

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.
F ) is set or not is determined in (#905), and if the flag (SETF) is set,
Proceed to step (#945). 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). If the switch (SEM) is not turned on, the process proceeds to step (#920) and it is determined whether or not the function change switch (SFUN) is turned on. Then, when this switch (S FUN) is turned on, the process proceeds to the subroutine for that change (#925) and returns.

Here, the above two subroutines are shown and explained in FIGS. 13 and 14, respectively. First, the exposure mode is changed.
Each time the up switch (Sup) is turned ON once, the process progresses cyclically as if it progresses gradually from P-4A-4S->M and then returns to P, and the down switch (Sdn) is turned ON once.
Each time, the process progresses like P4-A4-84-M,
After P, it moves cyclically in the opposite direction to the above-mentioned upward direction, such as moving to M. However, when an IC card (CD
) is changed according to the exposure mode set by
Modes that are not selected are 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). If it is ON, proceed to step (#1005) and set the RA
Check (Fbo) (Fbl) of M function data (Fbn) to determine whether P mode is currently selected as the control exposure mode. If selected, step (#
1010) and check whether the A mode is selected by the IC card by checking the internal E2PROM (MSb6) to (M
Sb8) (see Table 4) and if selected, the exposure mode is changed from P to A and the function data (Fb8) is selected.
O, Fbl) from (0, 0) to (0, 1) and return (#1015). Above step (#1010)
In step (#1025), if it is determined that the A mode is not selected by the IC card, it is determined whether the S mode is selected, and if the S mode is not selected, the process proceeds to step (#1025). #10
Proceed to step 40) to check whether the M mode is selected and sequentially search for the selected mode by card. Then, if there is a selected mode, it is set.

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

Similarly, if A mode is selected as the control exposure mode (Fbo, Fb1=o, 1), S mode is selected by the IC card, but if it is not selected, check whether M mode is selected. The exposure mode is changed to the selected mode and the bit (Fb
O), (Fbl) and return (#102
0-1030).

Now, S mode is selected as the control exposure mode.
Tokiniha (FbO, Fbl = 1.1), M mode is I
Determine which is selected by the C card, if selected, set to M mode, if not selected,
Change to 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 FU
The control when N) is turned on will be explained. Microcomputer (μ
C) has the four functions mentioned above, namely, highlight/shadow (H/S), exposure compensation (+/-), single shooting/continuous shooting (S/
C), 1 of spot AF/multi-point AF (s/A)
The E2PROM bit (MS
bO 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, at least one mode is selected, and the step to change data (#1205)
Execute the following 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/ The process progresses cyclically from C to S/A, then back to H/S after S/A, but if no function is selected by the IC card,
It's like jumping over that. Step (#121
0), when the function to be changed now indicates l(/S mode (RAM data NOCDbO shown in Table 5)
, CDbl, CDb2=O, 0゜0), +/- mode is selected by the IC card (#
1215) Determine from the E2PRoM no hit (Msbl) and if +/- mode is selected, +/-
mode data change mode, data CDbO~CD
b2 = O, 0, 1 and return 6 (#1220
). If +/- mode is not selected, step (
Step #1227) determines whether the S/C mode is selected by (MSb2), and if it is not selected (MSb2=0), advance to step (#1240) and switch to A/S mode. is selected (MSb3)
When this is also not selected (5b3
=O), proceed further to step (#1250) and H/S
Determine whether the mode is selected (MSbO). At least 11/s mode is selected now, so H
/ To change the function of S mode, CDbO to CDb2=
0. O, O. S/C mode, A/5-E
- When mode is selected, CDbO to CDb2 are set to change this mode. Similarly, the next mode after the mode of the function to be changed now (+/- mode for H/S mode, S/C mode for ÷/- mode, S/A mode for S/C mode, S/A mode If H/S mode) is selected by the card, determine if it is selected, and if it is selected, set the change mode to the next mode,
If not selected, H/S→+/-→S/C→S
/A-+H/S-1, the process stubbornly searches for the function selected by the IC card, sets data CDbO to CDb2 as the function to be changed from the selected function, and returns.

As can be seen, modes not previously selected by the card will be skipped with respect to the change mode. For example, the selectable modes are +/- and S/C.
If the function change switch (SFON) 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 (S FUN) is pressed again,
The flow goes to step (#1235), and from here step (#1240) → (#1250) → (#1215)
+/- becomes the mode to be changed, and the cursor on the display moves to +/-. In these cases, since the H/S mode and A/S mode are not selected, the setting of the change mode is essentially skipped.

In step (#1205), the switch (SSE)
If not turned on, the process advances to step (#1265).

In step (#1265), up switch (Sup)
Determines whether or not is turned on, and if it is turned on, data (CDbO ~
If it is H/S mode, the currently set mode is determined by data (FbO) (Fb7), and the next mode (→H-IS→) without l/S is determined cyclically. Data (FbO)
, (Fb7) should be set #1270. #1275)
, 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, the data Fb4. Fb5=0.
1, and if it is negative side correction, data Fb4. Fb5=
1. O, and if the correction is zero, no correction is assumed and data Fb4. Return with Fb5=0.0 ($11350 to $11370).

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 (#1265), the up switch (Su
p) is not turned on, the process advances to step (#1305), where it is determined whether the down switch (Sdn) is turned on, and if it is not turned on, the process returns. If it is ON, when changing the mode in H/S mode, the order of change is reversed (←H4-34-No H/S←
), and if it is in Juda mode, the exposure compensation amount (△
Except for subtracting 0.5Ev from Ev), the flow is the same as the flow when the up switch (Sup) 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 (SFUN) are OFF, the up switch (Sup) and down switch (Sd
The process advances to step (#927) showing a subroutine for changing the aperture value (Av) and shutter speed (Tv) according to n).

This subroutine is shown in FIGS. 21(a) and 21(b). To explain it, first, the microcomputer (μC)
Step (#1800) to check whether p) is turned on or not.
If it is not ON, step (#180
Proceed to step 5) to determine whether the down switch (Sdn) is turned on or not, and if it is not turned on, return. When the up switch (Sup) is turned on, the process proceeds from step (#1800) to step (#1810), and it is determined whether or not the M mode is set. Here, when in M mode (FbO, Fbl=1.O), step (#
1811), the E2PROM bit (MSb28) determines whether or not the mode is M1 mode (the shutter speed can be changed only by operating the up and down switches), and if it is the M1 mode (M5b28.0), the next At step (#1821), the aperture change switch (SAv) is turned on.
If it is ON (IP1
3=rLj) Step (#183) to change the aperture
0), if not turned on (IP13 = rHJ
'I, step to change the shutter speed (#182
Proceed to 3). First, I will explain how to change the shutter speed.
The E2 PROM bit (MSb29) should be used to determine whether this speed change is performed in 1/2Ev increments or IEv increments (#1823), 1/2Ev setting mode (MS
b29=1), move to step (#1850), add 0.5 to the current shutter speed (Tv),
Further, the process moves to step (#1855). - way, IEv
When performing in increments (MSb29=O), step (#1
824), it is determined whether the current shutter speed is Ev/2 or not, and the set value of Ev/2 [for example, Tv=6.5 (
0.5] of SS 1/90), step (#
1825), add 0.5Ev to this (Tv-6,5-
+Tv=7 (SS 1/90 → 33 1/120)]
, IEv unit, and further step (#1826
), add IEv and proceed to step (#1855). In step (#1855), it is determined whether or not the set shutter speed exceeds the maximum speed (TV@#u), and only if it exceeds, the shutter speed is limited to the maximum speed (#1860).
, return. If not, step (#1
860) and return. Step (#1
821), the aperture change switch (SAv) is turned on.
is in the aperture value change mode.
Step (#1830) sets the aperture value (Av) to 0.5Ev.
This is the maximum controllable aperture value (Av,...)
(#1835). If it exceeds the maximum aperture value (Av),
vsax) (#1840), and if it does not exceed it, do nothing and proceed to step (#1845) to determine whether or not it is in P mode. If it is in P mode, b) Step (#1879) of the flowchart
). Returns if not in P mode. In step (#1.811), when not in M1 mode (
MSb28=1), determine whether the aperture change switch (SAv) is turned on in step (#1822),
If it is turned on, the shutter speed is changed and the process goes to step (#1823); if it is not turned on, the aperture is changed and the process goes 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 = 0.0 or 0.1), proceed to step (#1830) and increase the aperture value (Av), and if it is neither, that is, S mode. (FbO, Fbl= 1.1) goes to step (#1823) and shutter speed (Tv)
Control the up of the.

When the down switch (3dn) is turned on in step (#1805), step (#1805) in FIG.
1865), determines whether the mode is M mode, and
mode (FbO, Fbl = 1. O),
Proceed to step (#1876), determine whether or not the mode is M1 mode, and if it is the M1 mode (MSb28=O)
, determine whether the aperture change switch (SAv) is ON (#1877). If it is ON, proceed to step (#1885) to change the aperture; if not, proceed to step (#1879) to change the shutter speed. ). In step (#1879), it is determined whether or not the setting mode is in 1/2Ev increments, and if it is in 1/ZEv increments (MSb29=1), step (#1905)
Proceed to step #1907), subtract 0.5Ev from the set shutter speed, and determine whether this is slower than the camera's minimum shutter speed (TV@l. #1907). If it is slower,
If the shutter speed is not the minimum (#1908), do nothing and return. If it is in lEv increments (MSb29=0), the current setting value is 1. /2Ev unit or not, and if it is 1/2Ev unit, 0
．． Add 5Ev, subtract 1 OEv from the added value, and return (#1880 to #1882). Step (
#1880), if the unit is not 1/2Ev, step (#1882) calculates 1. Subtract OEv and proceed to step (#1907). Step (#18
77) when the aperture change mode is determined (SAvON
), step (#1885) reduces the aperture value (Av) by subtracting 0.5Ev, and then step (#189)
0) to determine whether the value is smaller than the open aperture value (Av.), and if it is smaller, the aperture value is changed 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 (#1895) is skipped and step (#1900) is entered. If the determination in this step (#1900) is that the mode is P, the process proceeds to the above-described control flow for increasing the aperture value (#1823 to #1860) in FIG. 21(a), and if it is not the P mode, the process returns.

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 (S Av) is turned on, and if it is turned on, Proceed to step (#1879) to change the shutter speed, and if it is not ON, proceed to step (#1) to change the aperture.
885).

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 (
After passing through step #927), the process proceeds to step (#930). In this step (#930), a normally open switch (S C
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 (SCD) 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. = 0) returns and 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 and return in the next step ($11460), and 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 determined to be ON or OFF, and if it is ON or OFF, the process returns through steps (#955) and (#950) related to the control of the respective subroutines. This will be illustrated and explained in FIGS. 17 and 18.

First, Figure 17 shows the subroutine when the switch (S CD5) is turned on, and the microcomputer (μC)
In step (#1500), it is determined whether the mode setting card is installed, and if the card is not installed (b2=0 in 20H), the process immediately returns.

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 ($11
515) 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 of 20H = 1
), the switch (SCDS) is operated and the corresponding [
5CDSON) flow has been executed (
If the flag (CDSF) is not set in the step (#1555) of determining whether the flag (CDSF) is set, the process returns (#1555). When the flag (CDSF) is set, it means that the switch (SCDS) has been turned on or off to enter or cancel the data setting mode, and the data setting mode is set to determine which of these is the case. flag (SET
F) is set (#1560
). As a result, if it is determined that the flag (SETF) is set, the flag (SETF) is reset in step (#1570), and then E2PR is set in step (#1572).
After setting the flag (WRTF) indicating data writing to OM and assuming that the data setting mode has been canceled by operating the switch (S CD5), proceed to step (#157).
Step 5) resets the flag (CDSF) and cancels the data setting mode. If it is not set, this flag (SETF
) (#1565) and set the flag (CDS
F) (#1575) and return.

After completing the key setting control shown in FIG. 12 in the above manner, the microcomputer (μC) moves to step (#
440), the process 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 a flag (AELF) indicating AE flock is set or not, 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 "H" level, commands the photometric circuit (LM) to output photometric data, and performs serial communication (#1
605. #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 ($11615
). Then, in the next step (#1620), it is determined whether spot photometry is selected, and if it is selected (Fb12 = 1), the brightness value (Bv2) of the photometry range (LM2) is set to the spot value (Bvsp). ) ($116
60). When the mode is multi-point mode (Fb12=O), the process proceeds from step (#1620) to (#1622), and it is determined whether or not a flag (AFNF) indicating that it is not in AF mode is set, and then step (#1624) Determine whether or not the flag (LCONF) indicating focus detection is not possible is set, and if either one is set, return the small photometry range (LM2) in the center as the spot value (Bvsp). . Flag (AFN
When F) 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 (#162
5), and in the next step (#1630), it is determined whether this image magnification β is greater than or equal to a predetermined value (KB), and the size of the subject occupying the photographic screen is determined.

If it is more than the predetermined value, the object is considered large and the step (#
1640) and each photometric range ([, Ml), (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 (B v2) of the photometry range (LM 2 ), and when neither flag is set, that is, when the day focus amount of the third island (AF3) is selected, the brightness of the photometry range (LM3) The values (Bv3) are respectively set as spot photometric values (Bvsp) (#1645 to #1665). Then, it is determined whether or not focus is achieved, and if it is in focus (AFEF=1), an AE flock flag (AELF) is set to perform AF-AE flocking,
If it is not in focus (AFEF=O), the AE flock flag (
AELF) 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 release the AE flog, use the AE flog 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 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, the microcomputer (μC) is
First, in step (#1700), the E2FROM data (
MSb5), and when in the 10 second hold mode, proceed to step (#1705) and determine whether the AE flog switch (SAEL) is turned on. If not, the AE flog switch (SAEL) is turned on. The flag (AEONF) indicating that the switch has been operated and the flow after step (#1705) has been executed is reset (#171).
0), return.

In step (#1705), if the AE flock switch (SAEL) is turned on, the above flag (AE
ONF) is set or not in step (#17
15), 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 the operation was performed to perform AE flow, and this should be set #1730
), when the flag (AELF) is set, A
The flag (AELF) should be reset because the E-flock was operated to release it while it was operating (#1725), and the process goes to step (#1735), and the AE-flock switch (SAELF) is reset.
WL) is operated, a flag (AEONF) indicating that this flow has been executed is set, and the process returns.

At step (#1700), if it is not in 10 second hold mode, press A at step (#1740).
Determine whether or not the E flow switch (SAEI,) is turned on, and if it is not turned on, set the flag (AEL).
F) (#1755). When it is ON, please set the flag (AELF) #1745),
Reset and start the power supply holding timer (T1) (#1750) and 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 (lj455). This data communication is
To explain with reference to FIG.
O) Return without data communication. When a card is installed, the terminal (C3CD) is set to r) (J level (6330)) and data is output to the IC card (CD) (#335), indicating that the IC card is on the input side. After that, in step (#340), it is determined whether the IC card installed in the camera is a mode setting card, and if it is an IC card in data setting mode (2
0H b2 = 1), set the switch data sensed and memorized in step (#900) of Figure 12.
1344), performs serial communication ($1348), and outputs switch information to an IC card (CD). After that, the terminal (C8CD) is set to the "L" level and the process returns to step #35.

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.
Output to C card, set terminal (C8CD) to "L" level, terminate data communication, and return (#346~
#350).

In addition, as data for exposure calculation, photometric value (B v s
) + (BVAv), film sensitivity (Sv), and data indicating whether it is a positive or negative film. Lens data includes focal length data, open F value (Avo) = maximum aperture value (AVII@X), and Flash data includes data indicating whether the flash is forced to fire or automatic, data indicating whether the flash is not installed (including when the power is off), and G.
There is N (guide number), data on whether charging is completed, etc.

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

The flow of this control is shown and explained in FIGS. 22 to 26. First, the microcomputer (μC) performs the step (#2
000), determine the amount of exposure (ΔEvl) to be constantly corrected from MSb32 to MSb34 of the E2PROM, and add the manually set exposure correction amount (△Ev) to this to calculate a new amount of exposure correction ( #2001). In step (#2002), it is determined from the input lens data whether a lens is attached, and if it is not attached, the photometry range (LM4) is determined in the same way as the actual aperture photometry.
The shutter speed is calculated by adding the film sensitivity (Sv) and the exposure correction value (ΔEv) to the photometric value (BVAM) (instead of this, the overall averaged photometric value may be used) and returns (#2005). If a lens is attached, perform exposure calculation according to each exposure mode (#2010
~112040).

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 2Rv or more (#210
0), if it is 2 Ev or more, it is determined in step (#2105) whether or not the electronic flash device is ready to emit light (the main capacitor is fully charged), and if it is ready to emit light, the terminal (FLOK) to r HJ level (112110) to enable flash photography, and set the control exposure value (Ev) from the photometry value (BVAM) of the photometry range (LM4), etc. Kv = BVAM + Av, + Sv -1 + △E
Find it by V (#21i5). 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 (#
2120) and return. This is shown in Figure 23 (b
), the shutter speed control value (Tve
) is synchronized Tv = 7 (SS = 1/125), and the aperture value (Av) is calculated by subtracting 7 (shutter speed) from the exposure value (Ev), and this aperture value (Av) is 7 (F = 1.
1) Determine whether it is larger than the above value, and if it is larger, 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) is smaller than the open aperture value (Avo). If it is, the open aperture value (Avo) is changed to the control aperture value (
Avc), and if it becomes smaller than X, the calculated value (Av) is returned as the control aperture value (Avc) (I2220~
#2230).

Returning to FIG. 23(a), in step (112105), if p1 is not ready for emitting light from the electronic flash device (FL), the terminal (FLOK) is set to r L J level (#2125), and the main subject is In order to obtain proper exposure, the control exposure value (Ev) is calculated from the spot value (Bvsp) of the photometry range, etc. as Ev = Bvsp + Avo + Sv + △Ev (#2130), and the aperture value (Av), shutter speed (
Subroutine (#213) of program ■ to find Tv)
Proceed to step 5) 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 (Avssx) of the lens (#2255). If it is larger, the maximum aperture value (AVssx)
) as the control aperture value (Avc) (#2260), and the process proceeds to step (#2280). In step (#2255), when the aperture value (Av) is less than or equal to the maximum aperture value (Av, □), it is determined whether or not the aperture value (Av) is smaller than the open aperture value (Av, ). Open aperture value (Av.

) is the control aperture value (Avc), and if it is not small, the calculated aperture value (Av) is set as the control aperture value (Avc) and the step (j
12280) ($72265~#2275).

In step (#2280), the shutter speed (Tv)
is obtained by subtracting the control aperture value (Avc) from the exposure value (Ev), and in the next step (#2285) it is determined whether this is greater than the maximum shutter speed (TVmsj),
If the control shutter speed (Tvc) is large, the control shutter speed (Tvc) is
vsaj (#2290), and if not, it is determined in step (#2292) whether the shutter speed is slower than the slowest shutter speed (Tv, +.), and if it is slower, (Tv-+n) Control shutter speed #229
3) If it is not slow, set the calculated shutter speed (Tv) to the control shutter speed (Tvc) (#2295) and 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+B
v2+ Bv3+ Ev4)/4 exposure value (Ev)
is determined, and it is detected 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 you are in flash photography auto mode, which automatically determines the presence or absence of flash photography, and if it is in 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-6,176).
It is determined whether the value is less than 0) (#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, set the aperture value (Av) during flash photography using program ■.
Then, the shutter speed (Tv) is determined and the terminal (FLOK) is set to the "H" level (#2175) to enable 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
6 (#2300
~ #2310 and #2345). If the flash preparation is not completed, calculate the exposure value (Ev) from the average metering value, and subtract the set aperture value from this exposure value (Ev) to determine the shutter speed (Tv) (#2315. #2320)
. Then, in the next step (#2325), the shutter speed (Tv) is set to the maximum controllable shutter speed (T
v, □), and if it is, the maximum shutter speed (Tv, a) is determined in step (#2330).
x) as the control shutter speed (Tvc) and the step (
Proceed to #2340). If not, it is determined in step (#2331) whether the speed is lower than the controllable minimum speed (Tvs+-), and if it is low, (Tvl, l) is determined in step (#2333). The control shutter speed (Tvc) is set as the control shutter speed (Tvc), and if the speed is not lower than (Tvmin), 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 (FT, OK) is set to "L" level, and in the next step (#2345), the set aperture value (Av) is changed to the control aperture value (
Avc).

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 the rHJ 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
v) is not smaller than the open aperture value (Av, ), it is determined whether it is larger than the maximum aperture value (AV@IIyo) (#2445); if it is larger, the maximum aperture value (AVI
I@X) as the control aperture value (Avc) #2450),
If it is not large, change the calculated aperture value (Av) to the control aperture value (A
vc) (#2455) and return.

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 (Fl
, OK) to the "L" level and L r (#2465), step (#2430)): Proceed and execute the subsequent flow.

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 it is not completed, connect the terminal (FLOK) to r L J
When the level is completed, the terminal (FLOK) is set to “H”.
” level, proceed to step (#2515), and change the preset aperture value (Av) to the control aperture value (Avc
), and in the next step (#2520), the shutter speed (Tv) is returned as the control shutter speed (Tvc).

Returning to Figure 6, after completing the exposure calculation (#460), the camera's microcomputer (μC) performs the third data communication with the IC card (CD) (#465), Figure 5 (C) To explain this by showing a flowchart of this control, first, set the terminal (C3CD) to the "H" level, and then connect the IC card (CD
) and serial communication (to #36, IC card 8C)
Notify that the card is on the output side (11360).

At this point, wait for some time #365), then perform serial communication and input data from the RC card (CD) #370)
, When this data communication is completed, the terminal (C8CD) is
] 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 are 7 lines of data that perform control. (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 the 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 (#2802).
), and the card function is selected Saletail (CDFNF
-1) Proceed to throat step (#2605). on the other hand,
When the card function is not selected (CDFNF=O), the function beeps in step (#2677) - (7)
Set (Fb9) and (FblO) to o, reset the dimming level change amount (FΔEv) in step #2680, and return. When the card function is selected, it is next determined whether or not a program card is installed, and if a program card is installed (20H
/J) b2 = O) Lotus y whelk (#2610)
D. Next, 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, if it is not a program card (20H b2-1) at step (#2605) or step (#2610
), if the camera is not controlled by the C card, 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) Presence of Ful1 emission 5. / none, presence/absence of flash light emission, etc. are determined based on data input from the IC card (#2615 to #2645). Next, use the input data to determine whether the flashlight is activated or not.
0), when not in flash mode, set the terminal (FLOK) to “
L” level (#2685), step (#2680
). When in flash mode, the terminal (FLOK
) is set to "H" level (#2655), and it is detected whether the Full 1 light emission mode is set (#2660). And Fu
When in l1 light emission mode, set the terminal (Full) to "H" level in step (#2665) and return.
u I L When not in the light emission mode, the terminals (Ful, l
) to the "L" level (#2670), set the dimming level value change amount (C-FΔEv) (#2675), and return.

In FIG. 6, after completing the routine for determining and controlling the camera using the IC card (#470), the process moves to display control (#472).

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 or calculated values. The display of various modes is set according to the mode set at that time. AE mode display is b
O and bl are the currently selected modes, and b2 to b4 (display data corresponding to change mode 2) are set by reading data from the E2PROM. 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 using the display indicating that the mode can be changed (1) (spot AF by program card, or spot AF by multi-point switch (SQ)), the multi-point/spot change is possible. Regardless of whether it is possible or not, multiple points or spots are displayed. In the display control circuit (DISPC), at the time of b7-1, multi-point or spot display is performed according to the signal of b6.

The number of films at that time is set as the number of films at that time, and the display data of the state at that time is also set for the Butkan/Pero display.

In the IC card related mode display, (I) rbOJ is set according to the installed card, and other (I)
, If, III) are set from the E2PROM (except when setting data), and when setting data, change mode data sent from the IC card is set. The controls are set according to the 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.

In step (#2725), the above flag (DISPI
F) is set, 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, rPROJ, the card is In step (#2728), mode data indicating the display of rcARDJ indicating that it is working is created. 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 is rl, OJ, b1 to b4
Let be rQJ.

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
OAH b5.9) is used to display data as shown in FIGS. 34(a) to (e) using the card functions set in the camera. b6=1.1, b1~b4=o
shall be.

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=O
(#2735).

When there is no card display control signal from the IC card in step (#2730), the process proceeds to step ($12736) and it is determined whether the write flag (WRTF) to the E2PROM is set. Write flag (WR
TF) is set, that is, when the data setting mode using the card ends, the process advances to the mode setting subroutine (#2737) and mode setting is performed. Further, the process proceeds to step (#2740), where b5.
Set b6=0°1 and b1 to b4=o. If the card function is not working (CDFNF=O), data is created to set bo=o at address OAH so that the "card" display is deleted.

Each step (#2728), (#2729), (#
2735) and (#2740), the focus display cloth/no focus indicator is the flag (A
F E F), 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 continuous AF (Fb8)
, multi-point distance measurement/spot distance measurement uses a bit indicating the function (Fb2
), S LON, OFF is 81 ON, depending on the flag (SIONF) indicating OFF, bO ~ of address OC1]
b5 is set respectively.

In addition, in the display control circuit (DISPC), the switch (Sl
) is OFF, the infinder display is turned off regardless of the signals (bO to b4).

Step (#2728) (#2729) (#2735)
In all cases of (#2740), step (#27
Proceed to step 45), set the terminal (C8DISP) to "H" level to perform data communication with the display control circuit (DISPC), perform serial communication (camera output side) in the next step (#2750), and complete the communication. After that, connect the terminal (C8DIS
P) to the "L" level (#2755).

Next time the card function is activated, it is determined in step (#2760) 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 (#2770), set 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).
Proceed to. 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 MSb12
= OH, 2H, 4H, 6H, 8H, AH, CH, E
In l), the process proceeds to step #2792 of #279 to output a pulse of a predetermined frequency from the terminal (OBZ) for a certain period of time in order to issue a warning using a buzzer.

When the control shutter speed (Tvc) is 6 or more or the mode does not provide a buzzer warning (MSb9 to MSb1)
2= LH, 3H, 5H, IH, 9H, BH, DH, F
For H), proceed to step (#2792) without issuing a buzzer warning.

In step ($12792), the camera function indicated by the input mode setting data is set to the E2PROM MSbO-
Flag (WRTF) indicating whether to write to MSb12
is determined, and if it is set, step (#2794
), the above mode setting data, i.e. b1 to b4 at address 22H, bo to b2 at address 23H. b4-b7 address 24
bo-bO of address 26H bO-b2 of E2PROM (MSbO-MSb3.MSb5~M
Sb12. MSb26 to MSb34) are written to bits corresponding to the data contents, the flag (WRTF) is reset in step (#2796), 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 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 flags (C) (GF) that are reset when there is a mode that can be changed. ) to the input data (bo-b2 at address 23H) to make a judgment #3203), and if they are different (i.e., there has been a change), the data is set to force the exposure mode to P mode. - Change data (FbO, Fbl) to (0, O)#
3205) and proceeds 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
) is the above flag (reset CI (GF) and change data (CI)bo - CDb2) indicating the change position)
(/S change (0,0,0) as step (#3230
) (#3220. $13225).

When there is no H/S mode (bl at address 22H = O
) is data (FbO, Fb7) as H/S of (0,0)
It is determined that there is no information (#3215), and the process proceeds to step (#3230).

In step (#3230), it is determined whether or not there is a 10/- mode, and if there is (b2 of address 22H = 1),
It is determined in step (#3245) whether the flag (CHGF) is set, and if it is set,
Reset the flag #3250) and step (#3250)
3255) to change the data (CDbO to 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 22H), no correction is made,
The function data (Fb4. Fb5) is set to (0, 0), 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 in '), and if it is set, it should be reset (#3275).
Change data (C change) in step (#3280)
DbO to CDb2) are set to (0, 1, 0) and the process proceeds to the next step (#3285).

When the flag (CI(GF)) is not set,
Skip steps (#3275) and (#3280) and proceed directly to step (#3285). Step (#
3260) and there is no S/C mode (address 22
For b3=o of H, 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 or not the flag (CHGF) is set, and if it is set, the flag (COGF
) (#3300) and proceed to the next step (
#3305), change data (CDbO
~CDb2) is returned as (0, 1, 1). If the flag (CHGF) is not set in the previous step (#3295), there is no mode that can be changed.
331, change data (CDbO to cDb2) to (1,
O, O').

Also, if there is no S mode in step (#3285) (b4 of address 22H=o), step (#3290
), 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
), allows interrupts and returns (11474).

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 (IPL2= r
L J ), step (
Proceed to #478). 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 E2F
A signal indicating a self timer time is read from the ROM (#4505). Next step (#4510)
Determine whether 28 is selected or not, and if 28 is selected (MSb30.31 = 0.0), wait 2 seconds at step ($14515) and return, as shown in Figure 6. Proceeding to step (#490), exposure control is performed (#495).

Similarly, when 58 is selected, 5 seconds, 10S
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 (IP12 = rH") in step (#475) of Fig. 6, step (#480)
Proceed to.

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,
In manual focus mode, step (#4
90) and proceed to (#495) to perform exposure control.
If it is not the manual focus mode (A mode), the process 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 (11490), 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 (described later), release switch (S
2) determines ONN pass/fail in step (#505) and returns 0.
If N(7) (IF5-r L J), it is determined in step (#510) whether or not the continuous shooting mode is in effect, and if it is in the continuous shooting mode (Fb3=1), the entire image is displayed in step (#515). Enable interrupts and proceed to routine SO3. Step (#505) when not in continuous shooting mode (Fb3=0)
The process returns to step (#520) and waits for the release switch (S2) to be turned off. When it 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 "H" level during (t2) to indicate that the exposure mode is set. 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 ($12815), the control aperture value (Av
After performing aperture control based on c) and controlling mirror up (#2820), the control shutter speed (Tvc
) to control the shutter speed based on (#2825
), further sets the Ful1 light emission signal terminal to r L J level (#2830), and returns.

Here, the operation of the interface circuit when the flash is emitted is explained in the ninth section.
To explain based on Figure (b), during flash photography, the terminal (FLOK) is at the "H" level, and when the front curtain of the shutter completes travel, the X contact turns ON, and the AND circuit (
The light emission start signal from AND21) is sent to the electronic flash device (ST).
The electronic flash device (ST) inputs this and starts emitting light. When not in Ful1 flash mode,
"H" level is output to the AND circuit via the inverter (IN21). When a pulse signal indicating the completion of dimming from the dimming circuit (STC) is input,
ND22) outputs this to the flash device via an OR circuit (OR21). In an electronic flash device (ST), this is input to stop flash emission. In the Ful1 light emission mode, the "L" level is input to the AND circuit (AND22), the AND circuit (AND22) becomes inactive, and the passage of the dimming signal is prohibited, so the electronic flash device (ST) In this case, no signal indicating the stop of flash emission is output.

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 (T
3) Reset start sequence 6 (#2850.#28
55).

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 ON, it is determined in step (#2865) whether 2 seconds have passed in this state, and if 2 seconds have passed, control to stop the motor is executed. Then, assuming that the film is taut, the film tautness is controlled (#2875) and the process returns. The above-mentioned subroutine is shown in Figure 32 (
As shown in b), it is determined in step (#2920) whether or not auto-return (automatically rewinding the film after the film is loaded) has been selected, and the selection is made (MSb9~Msb12-oH~3H18[ I-BH
l (Here, H is a hexadecimal number) A signal for motor reversal is given to the motor control circuit (MD), and the film detection switch (S FLM) is waited for when it is 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.
H, 3H, 6H, 7H, AH, BH, EH, FH), wait 1 second (#2945), then start the motor stop control (
$12955) and then return.

Unless it is involved (E2PROM MSb9 to M
Sb12=OH, LH, 4H, 5H, 8H, 9H, C
)], DI(), wait 0.2 seconds, stop the motor, and return (#2950).

When the above step (#2920) does not auto-return (MSb9 to MSb12 = 4H to 7H, Cl-1-
FH) 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 1-frame winding completion switch (SWD) is turned on in step (#2860), the motor is stopped in step (#2880), and then the next step ( Step #2885) determines whether the counter for the number of film sheets is a forward count type, and if it is a forward count type (MSb9 to MSb12 = OH-7H), the counter that indicates the number of film shots is counted in step (#2890). When the number (N1) is incremented by 1 and it is a backward calculation formula (MSb9 to MSb12 = 8)
1-FH), the count number (N1) indicating the number of remaining films is decremented by 1, and the process proceeds to step (#2900). In step (#2900), this number of films (N1) is set to MSb1 of E2PROM.
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 of CINT2) shown in FIG. 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 (SFLM) is OFF, the process proceeds to step (#3100) without performing initial loading.

In contrast, if a film is present (i.e., SFLM
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 (C3D
X) to “L” level (#3020 to #3030)
. And set the number (N1) to -2 113035
), then set the terminal (C8DISP) to “H” level,
Performs serial communication with the display control circuit (#3045) and sends a signal indicating initial load (OAH bl = 1. b
2 to b6=o) and the number of films are output, so that data other than the data indicating the number of films (N]) are not displayed. When serial communication is finished, the terminal (
C8DISP) is set to "L" level (#3050).

There are two 7s displayed for this number of films (N1).
Displayed using segments.

Next, the microcomputer (μC) outputs a signal indicating motor winding to the winding control circuit (#3055), waits for one frame to be hoisted (#3060), and switches to the one frame winding switch (#3060).
When SWD) is turned on, 1 is added to the number of films (N1), and it is determined whether or not it has become 1. If it has not become 1, the process returns to step (#3040). If it is 1, proceed to step (#3075) to stop the motor, and further determine whether or not the film counter is a forward counting type or not, and if it is a forward counting type, step (#3080) is determined. In step 3085), if (N1) is not a forward calculation, the number of film shots (N) read in step (#3090) is set as (N1), and the process proceeds to step ($13095). Then, in step (#3095), the number of films (N1) and the film sensitivity are written to a predetermined address of N2 FROM, 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 rH4 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 transfers the E2PROM data to RA.
It moves to the bit corresponding to the data content among the bits of M (IIcDIO) and waits for an interrupt (#CD15).

A signal from the camera indicating a data exchange i request (C8BCK)
is sent, the microcontroller (μC2) of the engineering C card executes the interrupt [:INT'l, which is shown in Figure 40 (b).
), the microcontroller (μC2) performs the steps (
#CD50) is used to control serial communication with the camera, and the data communication clock (S
CK), data from the camera is input, and it is determined which data communication (I, II, III) it is (#CD55). If you are a data communications engineer, first
Set data that indicates to the camera what type of card (mode setting or program) it is (mode setting card in this case), and output data based on the Glock (SCK) sent from the camera. (#CD6
0), wait for an interrupt (#CD63). Data communication is
If so, the process advances from step (llcD70) to step (#CD75), and data sent from the camera (key data in this case) is input in synchronization with the clock (SCK). Based on this input data, a data set routine (#CD75) is performed and an interrupt wait is performed (#CD63).

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.
After performing respective controls in steps #CD11O and #CD105), the process advances to step (#CD115). [:5C
DSON] C3CDSOFF) control flow is shown in FIGS. 40(e) and (f), and this control is shown in FIGS.
l:5cDsON), [5CDS shown in FIG.
Compared to the flow of "OFF" 1, the only difference is that there is no mode setting card determination step (#1500) and step (#1550) (this is not necessary on the card side), and the rest is the same, so the explanation will be omitted. .

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

Returning to FIG. 40(c), in step (#CD115), it is determined whether or not the set flag (C3ETF) is set, and if it is not set, (SCDSO
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 (CCDSF) is set, the display control flag (DISPCF) should be set #CD12
5) If the flag (CCDSF) 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), flag (C8E
TF) is set, execute the data set flow for data change and step (#CD12
Proceed to step 5) (#CD117).

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

In Fig. 40(d), the card switch (SCD) is set to O.
Check whether it is set to N or not (#CD135), and if it is set to ON, check the bit that stores the change mode (#CD135).
CCkbo-CCkb2), determine the current change mode, change to the next mode and return (#CD
140).

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 turned on, execute the flows of data sets ■ and ■, respectively, and return (#CD150, #CD1B).If both are not turned on, return without doing anything.

Next, data set ■ is shown in FIG.
The bit (CCkb3 to
CCkb22), the current number is determined and changed to the next number. For example, in mode T, the current number is r
OJ (H/S1 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 advance of the numbers 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 microcomputer (μC2) on the card side, and the microcomputer (μC2) on the IC card side The [reset] flow 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'O). 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 IC card inputs this data and determines the content of the communication (C51). If data communication is I, data indicating the type of card (in this case, it is a program card), data indicating that the AF mode is continuous, and the metering zone is multi-point are serially communicated to the camera side. It is output at (C52), and the process advances to step (C56) to wait for an interrupt.

Since this program card is designed for sports scenes, Continuous AF, which is always in focus, supports fast-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, exposure calculation is performed and an interrupt is waited for (C55).

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)
Open up the aperture to speed up the process. Therefore, Av
= (3/4) - Calculate Ev -23/4.

When Ev≧21, the shutter speed (Tv) is already considered to be sufficiently high, 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-Av When Av<Av, Tv=Ev-AV6 (b) If the film is a negative film, the shutter speed (Tv) should be adjusted to increase the shutter speed (Tv). Make corrections.

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 mm 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. ,
Control is not performed because the probability of camera shake caused by moving the lens to follow the subject is low.

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 70
For lenses smaller than mn+, card control is not performed for the reason described above, so in this case too, jump to step [phase] and leave exposure control to the camera body.

If the focal length is 70 mm or more, check the state of the forced flash switch based on the data input in step (2). If the flash forced light emission switch is ON, the card does not perform control for the reason described above, so the process jumps to step (2).

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) ・Ev −23 Find (Av) in step ① from the formula C. When Ev≧21, Av= (1/2
) - Obtain (Av) from the equation of Ev -1/2 in step (■).

(Av) calculated in step ■ and the minimum aperture value of the lens (
A comparison with AVmaj is performed in the next step (2). 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 A v a. Let's say a.

On the other hand, when Av(Av□.), Avc=
Let it be Av. In this way, the aperture value Av for body control
After determining c, the shutter speed (Tv
) is calculated based on the formula Tv=Ev-Avc.

In the next step ■, this shutter speed (Tv) is compared with the camera's maximum shutter speed (TV@@X). If Tv≧Tvm□, proceed to step @ and use the camera's maximum shutter speed (TV@@X). Shutter speed (Tvc) (TVI
When Tv<Tvssx, Tvc=Tv in step [phase].

If Ev (21) is determined in step (2) above, (Av) is calculated using the formula shown in step (2), and then the process proceeds to step (2).

In step (2), (Av) calculated in step (2) is compared with the open aperture AV6. Here, when Av>Avo, the process goes to step (2) to compare (Av) and (AVsa.). When Av≦Av, the aperture value of the lens cannot be opened any further, so the process proceeds to step [phase] and the aperture value for body control (Avc) is set to (Av, ).

Then, in step ■, N Tv= Ev −Av
The shutter speed (Tv) is calculated from the formula c.

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 [phase]. TV
When <E3, the process proceeds to step [stock] and further determines whether the shutter speed (Tv) is 8 or higher.

Here, when TV≧8, TvC=9 and step @), and when Tv<8, step so Tv=Tv+1
Perform the following correction and proceed to the next step (■). 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=-5 is set (step 2), and when Tv≧-5, Tvc=Tv is set (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 mentioned 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) E2PROM Table Functional Data (Fbn) AM Table (Continued) Table Change Data (CDbn) (RAM) Table Card Communication Output Data (C3bn) Table (Continued) Table (a) Table (b) Table (b) (Continued) Table (b) (Continued) Table Data Display RAM (Register) Table (Continued) Table Lens (II) Table Lens (I) Table In this example, as shown in FIG. On the viewfinder display (DISPz), one display (103) is used both to represent the continuous AF mode and to represent the tracking mode.In both of these modes, the subject is moving. Since they are common to all cameras, photographers do not feel any discomfort even if they are shared.However, since the space inside the viewfinder is inherently constrained, reducing the display in this way is
This is preferable from the viewpoint of improving visibility and reducing costs.

In the present invention, by using the same display for two conceptually similar operation modes, it is possible to simplify the display and improve visibility.In addition, the cost of the camera system is reduced. Down is achieved.

[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. Figure 9(a) is a circuit diagram of an electronic flash device, and Figure 9(a) is a circuit diagram of an electronic flash device.
b) is a circuit diagram of the interface. FIG. 10(a) is a flowchart of the AF routine.
Figures (b) to 10(f) are detailed views thereof. 11th
The figure is a diagram showing a distance measurement range and a photometry range within a photographic screen. FIG. 12 is a flowchart showing the setting routine of the keys provided on the camera, and FIGS.
Figure (a), Figure 14 (b), Figure 15, Figure 16, Figure 1
7 and 18 are flowcharts showing specific setting routines for the various keys. FIG. 19 is a flowchart showing the photometric data creation routine, and FIG. 20 is a flowchart of the AE flow. Figure 21(a)
, FIG. 21(b) is a flowchart for setting the aperture and shutter speed. 22 [m is a flowchart of exposure calculation, and FIGS. 23(a) to 23(c),
25 and 26 are flowcharts of each mode therein. FIG. 27 is a flowchart of control by an IC card (particularly a program card). 28th
The figure is a flowchart showing the display routine.
FIG. 9 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 flowcharts for winding one frame of film, and Figure 33 is an interrupt for closing the back cover. 2 is a flowchart showing the routine of FIG. Figures 34(a) to 34(
e), FIG. 35(a), and FIG. 35(b) are diagrams showing display examples. FIG. 36 is a circuit diagram inside the lens, and FIG. 37 is an external view of the lens. Figure 38 is an example of the infinder display.
Figure 9 shows an example of the body display. Figure 40 (
a) to FIG. 40(h) are flowcharts showing various routines for IC cards, FIGS. 41 and 42 are broochyards particularly for the case of program cards, and FIG. 43 is a flowchart for one exposure calculation. FIG. 44 is a program diagram regarding the program card. (μC) (μC2) (CD) (SQ) (Sl) Microcomputer IC card lens compensation switch for the microcomputer IC card in the camera body Lens AF start switch.

Claims (5)

[Claims] (1) Equipped with a display device that displays the operating status of the camera, predicts the movement of the subject based on the results of multiple focus detections,
There is a moving object tracking focus adjustment function that drives the lens so that the subject is in focus based on this prediction, and a continuous autofocus mode that drives the lens so that the subject remains in focus even after the subject is in focus. What is claimed is: 1. A camera system characterized in that a display indicating that a moving object tracking focus adjustment function is in operation and a display indicating that a continuous automatic focus mode is in operation are displayed on the same display on a display device. (2) In the camera system, the autofocus mode can be selected between the continuous autofocus mode and the one-shot autofocus mode in which the lens is not driven once the subject is in focus, and the moving object tracking is possible. 2. The camera system according to claim 1, wherein the focus adjustment function operates after a one-shot autofocus mode is selected and once the subject is in focus. (3) The camera system according to claim 2, wherein the display device displays the selected autofocus mode. (4) The camera system according to claim 2, wherein the autofocus mode can be selected by a switch provided on the lens side. (5) The camera system according to claim 1, wherein the display device is provided within a finder of the camera.