FR2658317A1 - FILM SUPPLY DETECTION DEVICE. - Google Patents

Abstract

A film feed detecting device for detecting the length of the advance of a film, wherein a pulse signal consisting of ON / OFF states in response to feeding a film. If the change in signal state is detected, detection of the pulse signal is inhibited for a predetermined period of time. Application to the advancement of the film in a camera.

Description

DEVICE FOR DETECTING FILM POWER SUPPLY

  The present invention relates to a detection device used in a camera for detecting the

length of the film advance.

  Conventionally, cameras using an automatic film winding have been equipped with means for detecting the length of the advance of a film in order to determine the value of the drive of a winding motor. An example of such means for detecting the length of the advance of the film is a device referred to as a winding pulse contactor. The winding pulse contactor comprises a rotatable element which is rotated in response to the power supply of the winding pulse. film, and a pair of contact pieces that close and open contact repeatedly at a substantially constant interval as the rotating member rotates. Thus, an ON / OFF signal is produced at a substantially constant interval depending on the rotation of the

the rotating element.

  In this case, as a pulse signal is produced by the closing / opening of the contact parts, the contact parts can come into contact

  accidental, for example, due to mechanical shock.

  Then a pulse can occur at a time when the pulse should not theoretically occur In such a case, the length of the detected advance becomes

  different from the length of the actual advance.

  It is therefore an object of the invention to provide an improved film feed detection device in which the possibility of error on the feed length of the film is reduced even if the signal corresponding to the length of the advanced of the film is issued

wrongly.

  The present invention provides for this purpose a film feed detecting device for detecting the length of film advancement which comprises: signal generating means for producing a pulse signal in response to the advance a film, said pulse signal consisting of a first and a second state thereof; detection means for detecting the state of said signal; discrimination means for discriminating whether the state of said signal is changed or not; and inhibiting means for inhibiting said detection means in detecting a change in the state of said signal for a predetermined period of time after

  that said change has been detected.

  Optionally, said detection means identify the state of said signal when the same state of said signal is detected during a predetermined detection time. In addition, said discrimination means detect the signal change only when the state is

  modified from said first state to said second state.

  Moreover, said discriminating means repeatedly determine whether the state of said signal is changed within a second predetermined period of time.

  until the state change is detected.

  In addition, the camera stops film feed detection if the change in the state of said signal is not detected in a third period.

predetermined time.

  Additionally, said signal generating means comprise: a first contact element arranged in a fixed manner; a second contact member movably disposed, said second contact member being brought into contact with said first contact member, and spaced therefrom in a neutral position; and an implementation member which is driven in response to feeding said film to reciprocate said second contact member to come into contact and move away from it. said first contact element, whereby said second contact element comes into contact with said first contact element in a back-and-forth movement in response to the power supply of the

movie.

  In addition, said implementation member comprises a rotatable shaft member, said rotatable shaft member being rotated in response to feeding the film, and projecting members disposed along the peripheral surface of said shaft member, said second contact member being driven in a reciprocating motion to contact and move away from said first contact member when said

tree turns.

  The characteristics and advantages of the invention

  will emerge from the following description at

  by way of example with reference to the accompanying drawings, in which: Figure 1 shows a top view of an electronically controlled camera incorporating the present invention; Fig. 2 is a front view of the camera of Fig. 1; Fig. 3 shows the rear view of the camera of Fig. 1; Fig. 4 is a block diagram of the control circuit of the camera; Fig. 5 is a schematic view of the composition of the contacts of a plan change contactor thereof; Fig. 6 is a table showing the relationship between exposure systems (modes) and displays thereof; Fig. 7 is a table showing the relationship between the shooting systems (modes) and the displays thereof; Figure 8 is a schematic view of the segments of an LCD display (liquid crystal display); Fig. 9 is a developed view of a coding plate and a table showing the relationship between the coding plate and the codes; Fig. 10 is a schematic view showing an example of the plan change operation; Fig. 11 is a diagram showing a mechanism of the winding pulse contactor; Fig. 12 is a diagram showing an exemplary output of the winding pulse contactor WP; Figure 13 is a flowchart for a program

RESET;

  Fig. 14 is a flowchart for a sub-program EXPOSURE / SHOOTING SYSTEM INITIALIZATION; Fig. 15 is a flowchart for a ZOOM INITIALIZATION subprogram; Figure 16 is a flowchart for a program

LOCKING;

  Fig. 17 is a flowchart for a sub-program DISPLAY NUMBER OF VIEWS; Fig. 18 is a flowchart for a sub-program WINDING SYSTEM INITIALIZATION; Fig. 19 is a flowchart for a LOADING subprogram; Fig. 20 is a flowchart for a sub-program COUNT WINDING PULSES; Fig. 21 is a flowchart for an INTERRUPTION subprogram; Figs. 22-A, 22-B and 23 are a flowchart for MAIN processing; Fig. 24 is a flowchart for sub-programs RENTREE OBJECTIVE, AUTOMATIC RETURN OBJECTIVE, WIDE ANGLE DISPLACEMENT 1, and TELE-OBJECTIVE DISPLACEMENT; Fig. 25 is a flowchart for a POSITION OBJECTIVE RESTORATION subroutine; Figs. 26 to 29 are flowcharts for a TELEOBJECTIVE / WIDE ANGLE DISPLACEMENT program, and variants thereof; Fig. 30 is a flow chart for a WIDE ANGLE DISPLACEMENT sub-program 2; Fig. 31 is a flowchart for a sub-program ZOOM TO TELEOBJECTIVE; Figs. 32-A and 32-B are a flowchart for a wide-angle zoom sub-program; Figs. 33-A and 33-B are a flowchart for a sub-program SETTING EXPOSURE / SHOOTING SYSTEM; Fig. 34 is a flowchart for a VARIABLES SETUP sub-program; Fig. 35 is a flowchart for a sub-program SELECTION VARIABLES; Figure 36 is a sub-program DISPLAY

VARIABLE;

  Figs. 37-A through 37-C, 38-A through 38-C show a flowchart for an AEAF control program (auto exposure / autofocus); Fig. 39 is a flowchart for an AEFM subprogram (auto exposure / manual focus); Fig. 40 is a flowchart for a DISCONTINUED subroutine; Figure 41 is a flowchart for a program

WINDING;

  Figures 42-A and 42-B show a flowchart for an INTERVAL CONTROL program; and Figures 43-A through 43-C show a flowchart for

a REWINDING program.

  As shown in FIG. 1, a camera body 1 has a fixed barrel 2 and a movable barrel 3 As shown in FIG. 2, the front face of the camera body 1 contains a measuring section 4, a viewfinder window 5, a flash of the type with a change of plane 6, a photometry element, such as a Cd S, and an automatic delayed release lamp 7 The back of the camera body 1 contains a rear cover 8, a mode key 9, a selection key 10, a drive key 11, a zoom lever 12, a power button 13, a green indicator lamp 14, a red indicator lamp 15, and a rear cover release lever 16 When this lever is moved from an upward abutment position to a downward abutment position, the rear cover 8 opens When the rear cover 8 is opened, the unlock lever 16 of the back cover is in the p while the rear cover 8 is closed, the unlocking lever 16 of the rear cover returns to its abutment position.

to the top.

  As shown in FIG. 1, the upper section of the camera body 1 contains a shutter button 17, a TW (telephoto / wide angle) button 18 and a liquid crystal display (LCD). 18 is used for adjustment in the two opposite positions which are the respective ends of the

moving the zoom lens.

  The zoom lever 12 can be moved in the first direction, indicated by the arrow rl in Figure 1 and in a second direction, indicated by the arrow r 2 The zoom lever 12 allows the camera lens of be moved between a wide-angle end and a telephoto end The zoom lever 12 is used for setting up the exposure system and the shooting system, which will be described later with the functions of the

  mode 9 and the drive key 11.

  The camera contains a control circuit including shutter-related processing in combination with an integrated control circuit. A single integrated circuit has been designed which contains the main CPU, the secondary CPU, the integrated circuit, and the controller. command, an auto focus integrated circuit

  and other electronic circuits.

  The main CPU performs the following functions in response to input signals delivered to the camera: (1) controlling the zoom motor and a film motor via a motor control circuit; (2) the control of the ignition and flashing (the representation of which is omitted in FIGS. 1 to 3) of the green lamp indicator 14 which provides an indication relating to the distance measurement of the red lamp indicator 15 which provides an indication relating to the flash, and the automatic delayed release lamp 7 which provides an indication of the automatic delayed release; (3) the control of the indications in the LCD display 19; and

  (4) charge control of the flash circuit.

  The information is input to the main CPU by the following means: (1) a PSW power contactor, which is set to ON when the power key 13 is pressed, and which is set to OFF when the key is pressed. power 13 is not pressed The power is delivered to the camera when the power switch is set to ON in the power-off state, and the power supply is prohibited when the contactor power supply is set to ON in the allowed power supply state; (2) a SWS photometric switch, which is set to ON when the shutter button 17 is pressed halfway; (3) a SWR trigger switch that is turned ON when the shutter button 17 is pressed fully; (4) a TELE zoom telephoto switch which is set to ON when the zoom lever 12 is moved from a central, neutral position towards a telephoto end ri; (5) a WIDE zoom wide angle switch, which is set to ON when the zoom lever 12 is moved from a central, neutral position towards a wide angle side r 2; (6) a MVSW zoom mode switch, which indicates how the zoom lens is moved, ie, stepwise or continuous displacement (Stepwise and Continuous Displacement are described further); (7) an EXPSW mode switch, which is ON when the mode key 9 is pressed The mode key 9 is used to set up the exposure system; (8) a DRIVSW drive contactor, which is placed

  ON when the drive button is pressed.

  The drive key is used to set up the shooting system; (9) A SLSW selection switch which is set to ON when the selection key 10 is pressed. The selection key 10 is used to select the number of shots to be taken in self-timer delayed shooting. start time of the shooting interval and the duration of the interval, etc .; (10) zoom code inputs, ZCO, ZC 1, and ZC 2, which relate to the control of the lens position, the display of the focal length, etc. Details

  additional information on these will be described later.

  (11) a back cover switch BACK, which is set to OFF when the lock lever 16 of the rear cover is pushed down and is set to ON when the rear cover 8 is closed and the lever returns to the position in his dwelling; and (12) a WP winding pulse contactor for detecting the feeding of the film Details

  additional information on this one will be described later.

  Now, the MVSW zoom mode switch, WIDE zoom wide angle switch, and TELE zoom telephoto switch will be described in detail The MVSW, WIDE and TELE zoom contactors are controlled by a zoom lever, the The contact points are shown in FIG. 5. The mechanical construction of the contactors relating to the zoom comprises contacts and a broom attached to the zoom lever 12.

  described in detail individually below.

  The TELE zoom telephoto switch is set to ON when the zoom lever 12 is moved from the center position toward the first direction indicated by the arrow ri in Figure 1, and the WIDE zoom wide angle switch is ON when the zoom lever is moved in the second direction indicated by the arrow r 2 And both the WIDE zoom wide-angle switch and the TELE zoom telephoto switch are set to OFF when the zoom lever is square

in the central (neutral) position.

  The zoom mode switch is set to ON when the zoom lever 12 is moved between the center position and the halfway position toward the first or second direction ri, r 2 The zoom mode switch is set to OFF when the zoom lever 12 is moved further in the direction of the arrows r 1, r 2 from one

  either of his halfway positions.

  The stepwise movement and the continuous displacement correspond to the ON and OFF states of the zoom mode contactor, respectively With these combinations, five

  conditions are entered in the main CPU.

  The information is used for the implementation of the zoom or for setting up the shooting system and the exposure system. For example, when the implementation of the zoom is carried out, the information for the rotation before / rear of the zoom motor, and for the stepwise / continuous movement of the zoom lens are entered in the main CPU. While the secondary CPU controls a range finder, which consists of an infrared light emitting diode (LED) and a PSD position sensor by means of an autofocus integrated circuit, and transmits the information of distance measurement from the autofocus integrated circuit and the information of

  photometry from the Cd S to the main CPU.

  The control IC drives the shutter circuit according to the instructions from the secondary CPU and outputs a trigger signal to the controller.

flash circuit.

  The mode key 9 is used for setting up the exposure system As shown in FIG. 6, the following three exposure systems are available: AUTO (automatic flash illumination mode); WITH-FLASH (flash illumination mode imposed); and SANS-FLASH (prohibited flash illumination mode) Figure 6 shows the drawings of the LEDs corresponding to

  each of the three exposure systems cited above.

  In the case of the automatic mode, no indication is provided An EXPMODE counter (hereinafter simply called NEXPMODE ") is supplied in correspondence with the exposure systems EXPMODE" OH "" 11 H "," 2 H "respectively correspond to at AUTO, WITH-FLASH, and WITHOUT FLASH By the operation of the key mode 9, the value

of EXPMODE is changed.

  The drive key 11 is implemented to set up the camera systems As shown in FIG. 7, the following five kinds of shooting mode are prepared; VIEW-BY-VIEW shooting mode, AUTO-SHUTTER mode, AUTO-TW (telephoto / wide-angle) mode, INTERVAL mode, and REWINDING mode Figure 7 also shows the indications for each of the five modes for shooting above No indication is given for the shooting mode VIEW-BY-VIEW On the other hand, a DRIVEMODE counter (called simply in the following "DRIVEMODE") is provided, and the DRIVEMODE " 0000 B "" 0001 B "," 00 10 B "," 0011 B ", and" 1 i *** B "respectively correspond to the VIEW-BY-VIEW mode, the AUTO-TRIP mode, the AUTO-TW mode, the INTERVAL and REWINDING mode. In the REWIND-FORCE mode, the "*" sign of "1 *** B" is replaced by either a "1" or an "O". The AUTO-TW mode is

described later.

  The DRIVEMODE is changed between "O" and "1" when the drive key 11 is pressed. An indication corresponding to EXPMODE and DRIVEMODE is displayed in the LCD display 19 and the shooting is controlled according to it. moreover, if the drive key 11 is kept pressed for more than three seconds, the camera is placed in the

forced rewinding.

  In the INTERVAL mode, both the start time of the interval and the duration of the interval can be set. In the camera of this embodiment, the start time of the interval is set by a relative time, that is to say, the start time of the shooting interval is determined by a period of time (minutes, seconds, or hours) from the moment it is fixed The duration of the interval is the time between shooting and the subsequent shooting In the AUTO-SHUTTER mode, five kinds of shots for the automatic delayed shutter are provided AUTO-TW is a a mode in which two shots are taken: the first shot is taken with the zoom lens placed at a desired position, and the second shot is taken with

  the lens placed at the wide-angle end.

  Now, the details of the signs displayed in the LCD display 19 will be described with reference to Fig. 8. The exposure system signs and the camera system signs are displayed when the mode key 9 and the key are displayed. As the meaning of each of the signs has already been described, the remaining signs are described below. In Figure 8, the "IINT" I sign is lit when the camera is set to the INTERVAL mode. The sign "l" "below the sign" IINT "I is displayed when

  the duration of the interval is being put in place.

  The sign "S" 'on the left side of "IINT" I is displayed when the starting instant of the interval is being set up Simultaneously, the sign ""' which is located below " Also displayed is a battery sign 20 when the camera battery is discharged. The display area 21 indicates the focal length, the start time of the interval, and the duration of the interval. The indication of the unit "Imm" is shown when the focal length of the zoom lens is displayed The unit signs "is", "m" ', and I "h", which correspond respectively to "seconds" "minutes" and "hours" are lit when the time period in the INTERVAL shooting mode is fixed In this case, display segments are used in common for "m" and Im These "is" 1 " m "il" 'h "', and 'Imm' are lit

  selective depending on the selected time period.

  The display area 22 is lit to indicate the number of shots, the sign "EX" I being the sign of unity of the

number of views.

  Figure 9 shows a diagram of the zoom code entries The zoom coding plate constitutes a part of the zoom lens barrel and has a drawing such as that shown in Figure 9 The oblique hatched portions of the zoom coding plate are formed by contacts, on which four brushes are in contact with the coding plate The brush located at GND is grounded, whereby GND is used as a common terminal while the other three brushes are used for the detection The codes ZCO, Z Cl and ZC 2 are set to "izéro" t, when each of the brushes contacts the respective terminal of the coding plate, while the codes are set to "1" when the brushes do not contact the terminals. respective terminals of the coding plate In this

  description, a three-bit information code detected by

  the continuity relation of these terminals is known as

than ZCODE zoom encoding.

  A POS position coding and DIV division coding are defined according to the zoom code mentioned above ZCODE so as to control the change of

plan.

  POS position coding is used to distinguish five conditions in the position of the photographic lens, that is, POS is set to "O" when the lens is placed in the retracted position in its housing; POS is set to "1" when the lens is in the range of prohibition between the wide-angle end and the retracted position; POS is set to "2" when the lens is at the wide-angle end; POS is set to "4" when the lens is at the telephoto end; and POS is set to "3" when the lens is located in the position between the wide-angle end and the telephoto end in the plane-shift area The DIV division coding is used to identify the position of the objective by dividing the 21-zone plan change zone The DIV in the figure is represented in the

  hexadecimal numbering system.

  In FIG. 9, the wide angle end (POS is equal to "2") is shown with a determined width. However, this part is a point having no width, ie POS equal "2" is obtained only when the lens is at the wide-angle end Just as POS equal "4" is obtained only when the lens is at the telephoto end The ZC 2 contact is used for detection

  the wide-angle end and the telephoto end.

  On the other hand, since the zoom area has 21 divisions corresponding to the focal length of the photography lens as mentioned above, it is

  necessary to identify twenty steps with only two bits.

  In this example, the relative code configuration, in which the "5", "4", "6" and "7" zoom codes corresponding to DIV division coding are repeatedly adopted from "H" to "14 H" ". When a configuration such as the one described above is used, it is impossible to identify a division code corresponding to the focal length of the lens only by the zoom code ZCODE The current division code can be identified by the rewrite division codes stored in the memory by detecting a position relative to the retracted position of the lens based on the detection of changes in the

zoom code ZCODE.

  In addition, the indication of focal length covers the range from 38 mm to 90 mm corresponding to each of the

  divided areas as shown in Figure 9.

  In Figure 9, the stop position of the lens when the zoom lens is moved in the zoom mode step by step is indicated by "O" The lens stop positions in the move not to not selected so that in each of the positions the indication of the focal length of the lens is not changed when the movement of the lens is controlled

  in such a way that the mechanical clearance is eliminated.

  Namely, in the camera incorporating the present invention, as the zoom motor is rotated in the forward direction before being stopped in order to eliminate the mechanical system games that occur when the zoom engine is stopped after a rotation in the opposite direction A photographer may feel an impression of disproportionality if the display of the focal length is changed from a short focal length to a

  long focal length in this forward rotation.

  Therefore, the stop positions in the mode of

  stepwise movements are selected as above.

  The displacement of the zoom lens is described by

referring to Figure 10.

  If the current is delivered when the lens is in its retracted position, the zoom motor rotates in the forward direction and the lens moves towards the wide-angle end as indicated by a

arrow "A".

  When the power supply is cut off with the lens in the area of change of plane, the direction of the zoom motor is reversed, whereby the lens is moved as indicated by an arrow "B" and it is is retracted into the dwelling In this case, it is not

necessary to eliminate the game.

  When the wide-angle end is selected with the key TW 18, for example, the direction of the zoom motor is reversed to move the lens until the lens comes beyond the wide-angle end, and then , the lens is driven further for 50 ms (milliseconds) in the same direction although the wide-angle end has been detected And after 50 ms have elapsed, the zoom motor is driven forward enrotation, this whereby the zoom lens is brought to stop at the wide-angle end as indicated by a

arrow "C".

  In the case of continuous motion, when the TELE zoom telephoto switch is turned ON, the lens is rotated until the TELE zoom telephoto switch is turned OFF as indicated by a "D" arrow. "In the case of stepwise movement, the zoom motor is rotated forward, thus causing the lens to come to the next stop position as shown by the

arrow "E".

  In the case of continuous motion, when the wide-angle WIDE zoom switch is turned ON, the zoom motor is driven, causing the lens to be shifted further for 70 ms in the same direction from the camera. the moment the WIDE zoom wide angle switch is set to OFF, as shown by an arrow "F" and then, the zoom motor is rotated forward for 50 ms and stopped By this means a play in the mechanical system can be eliminated In the case of stepwise movement, the direction of the zoom motor is reversed after the lens has passed at the stop position for 50 ms as shown by an arrow "G ", and then the lens is returned to the stop position of step-by-step change by the backward rotation of the zoom motor By

  therefore, the game can be eliminated.

  When the telephoto end is selected with the TW button 18, the zoom motor is rotated forward as shown by an "H" arrow, and

  the lens is stopped at the telephoto end.

  The winding pulse contactor WP comprises (Fig. 11) a signal gearwheel, a movable contact piece and a fixed contact piece. On the outer circumference of the signal gearwheel, projections for engagement with the perforations of a film are arranged, and the thrust part of the triangular section contact piece is formed around the axis thereof. The movable contact piece is in elastic contact with the thrust portion of the the contact piece of the signal gear and is intermittently moved to contact the fixed contact piece in correspondence with the rotation of the signal gear, whereby the moving contact piece is made come in contact repeatedly with the

  fixed contact piece and that it is separated from it.

  The winding pulse contactor WP outputs a signal "O" when the contact parts are in contact (ON) and a signal "1" when the contact parts are separated from each other (OFF) to the CPU

main.

  When the contactor mentioned above produces a signal, that is to say, a contactor that outputs signals ON / OFF corresponding to the conductive / non-conductive states thereof, an error on the state of the contactor can occur because of what's called a

  rebound and a false contact of the contactor.

  Classically, in order to avoid the error due to the bouncing, the test is not made from the signal obtained at a moment but the test is made when the same

  state continues over a predetermined period of time.

  In addition, for the above mentioned control, this camera uses the method in which the signal is not detected in the area between the changes of the signal in which the signal is not theoretically changed, whereby the camera is less influenced by faults due to contactor failure The winding pulse signal repeats the ON / OFF states virtually on

a constant period.

  However, the duration of the interval between modifications is designed to be longer than 12 ms (Fig. 12) therefore, as a signal is not theoretically modified within at least 10 ms since the signal has just been modified, signal detection is prohibited in this period Therefore, the influence of such a detection error can be decreased. In the camera incorporating the present invention, the main CPU is in the reset state at

  the initial state when a battery is removed from it.

  When the battery is charged in a camera, the reset state of the main CPU is triggered, and a process starts at a program

  RESETTING shown in Figure 13.

  First, all the memories are initialized (in the step RT 1), whereby all the marks are set to "O". Then, the signals of all the contactors are inputted (in the step RT 2). sub-program EXPOSURE / SHOOTING SYSTEM INITIALIZATION is called, which is shown in FIG. 14, whereby EXPMODE and DRIVEMODE are initialized (in step RT 3) By means of this initialization, each of the memories is determined so that the shooting system is set to the VIEW-BY-VIEW shooting mode, the exposure system is set to AUTO mode, the number of shots for the AUTO-SHUTTER mode is set to one, the start time of the interval is set to ten seconds, and the duration of the interval is set to ten seconds. Next, the exposure / shooting systems

are displayed.

  Then, the sub-program ZOOM INITIALIZATION shown

  in Figure 15 and called (in step RT 4).

  In this camera, as the zoom code ZCODE is a relative code as already described, the lens position can not be identified if the battery has just been removed and the information stored in the memory has been removed. was lost The sub-program ZOOM INITIALIZATION is called in order to immediately return the objective

  photographic in the retracted position.

  In the ZOOM INITIALIZATION subroutine (figure), the processing of the entered zoom code is executed (in step ZM 1) to test whether the zoom code is "2" or not (in step ZM 2) When the zoom code is "2", the lens has already been placed in the retracted position in its slot. However, the zoom motor is rotated forward to confirm that the main CPU has been reset to its original state. waiting for 100 ms (in the steps ZM 3 and ZM 4) Then, the step ZM 5 is executed When the zoom code ZCODE is not equal to "22", the step ZM 5 is directly executed the steps ZM 3

and ZM 4 being skipped.

  In step ZM 5, the direction of the zoom engine is reversed By entering the zoom code ZCODE in step ZM 6, it is tested if the zoom code ZCODE is "2" or not (in

step ZM 7).

  If it is tested in step ZM 7 that the zoom code ZCODE is equal to "2", step ZM 8 is executed, in which the brake of the zoom motor is applied Next, the POS is initialized (in the step ZM 9) and the command is returned

  at the point where the subroutine had been called.

  Using the above processing, the lens is returned to its retracted position (POS = O), the RESET program is completed, and the LATCH program

is executed.

  After the ZOOM INITIALIZATION subroutine is completed, a permanent timer of 0.5 seconds is started in step RT 5 which is mentioned when

  execution of the INTERRUPTION subprogram.

  Figure 16 shows a LOCKOUT program This program is a program such that it maintains a camera in its ready-to-operate state in a state of low power consumption when the state of implementation of the camera is switched from the ready state for shooting (operational status) to the locked state by operation of the power button 13, or when a RENTREE subprogram

  AUTOMATIC OBJECTIVE (described later) has been executed.

  In this description, it is assumed that

  the power supply was cut off by the power button 13, a film having been placed in the camera, the rear cover 8 being closed, and a predetermined number of empty shots was taken. it is assumed that the goal is placed in the

  retracted position in its housing.

  First, a 30-minute timer is started (in step LO) This 30-minute timer is used to clear the information of MVPOS, EXPMODE, and DRIVEMODE, which were stored immediately before the lens was automatically brought in the retracted position (described later), after 30 minutes have elapsed after the lens has been automatically brought to the retracted position It may be considered that a photographer has simply forgotten to turn off the power in the case where no operation was performed for 30 minutes or more since the lens was automatically brought to the retracted position. Then, all the indications displayed in the LCD display 19 are erased (in the step L 02), and it is tested if the mark "FLEXZ" is set to "O" or "1", (in step L 03) The brand? FLEXZ is used to

  test whether a movie is loaded in the camera or not.

  The brand? FLEXZ is "O" if there is no film loaded in

  the camera In this description, as it is

  assuming that a film was normally loaded, the mark

? FLEXZ is set to "1".

  When the? FLEXZ? Mark is set to "1", a VIEW NUMBER OF VIEWS subprogram is called (in step L 04) In the VIEW NUMBER OF VIEW subprogram, it is tested if the movie counter indicates more than " 10 "as shown in FIG. 17 (in step FP 1) When the film counter indicates a value greater than or equal to" 10 ", the number of shots is displayed by two digits (in the step FP 2) While when the counter indicates less than "10", the number of shots is

displayed instead of the tens.

  Then, the previous state of the power contactor PSW is memorized (in the step LO 5) When the mark? FLEXZ is set to "O", the step L 04 is skipped and the step LO 5 is directly executed Therefore, although the power supply is cut off, when a movie is loaded in a camera, the number of shots is

displayed in the LCD display 19.

  Then the current states of the PSW power contactor and the BACK back cover switch are input (in step LO 6). Then it is tested (in step L 07) if the timer counter reaches 30 minutes or not When it is tested that the 30 minutes of the timer have elapsed, the mark? AUTORET is set to "O" (in step L 08) This mark? AUTORET is taken into consideration when a test is made to find out if the The camera's operating state is the one immediately before automatic lens retrieval has been performed when the power button is pressed within 30 minutes since the lens was placed from the camera. automatic way

in the retracted position.

  Then, it is tested (in step L 09) if a movie has been loaded or not In this test, a mark? LDEND is used The mark? LDEND is set to "1" when the movie is loaded and it is put to "O" when the film is not charged to Namely, this mark is set to "O" when the

  Back cover switch BACK is set to OFF.

  When the mark? LDEND is at "O", step L 017 is

  executed in this description, as it is assumed that

  the film has been loaded, the mark? LDEND is set to "1", and the oil step is executed In step L Oil, it is tested if the back cover switch BACK is set to

ON or OFF.

  Since it is assumed that the back cover switch BACK is set to ON, step L 012 is executed. In step L 012, it is tested if no change has been made in the position of the PSW power contactor. This test is made by comparison with the previous state of the power contactor, which is stored in the memory, with the current state of the main contactor which was entered in step L 06 If the previous state and the current state of the PSW contactor are tested to be the same, operation in a low current consumption mode is performed (in step L 013), given that there has been no change in the state of the PSW power contactor, and the control loop back to step L 05 In this mode with low power consumption, the activity of the main CPU is interrupted and 500 ms later, the main CPU resumes the continuation of its activity By this means, the main CPU works from intermittently, the contactor input in step L 06 is executed every 500 ms, thus a low

  current consumption is achieved.

  Then, it is assumed that the rear cover 8 is open during operation in this low power consumption mode. When the rear cover 8 is opened, the back cover switch BACK is set to OFF, therefore, in step L Oli, it is tested that the back cover switch BACK is set to OFF Then, the steps L 014 to L 016 are executed In the steps L 014 and LO 15, the subprograms INITIALIZATION SYSTEM EXPOSURE / SHOOTING and INITIALIZATION WINDING

are called.

  In the WINDING INITIALIZATION subroutine, the? LDEND? Mark, the? FLEXZ mark, and the? REWEND? Mark are set to "O" (in steps W 51, W 52 and W 53) as shown in FIG. is deleted (in step W 54), therefore the number of views is

  not displayed in LCD display 19 (in step W 55).

  When the WINDING INITIALIZATION subroutine is completed (in step L 06), the? AUTORET? Mark is set to

  "O", and the command goes to step LO 12.

  If the rear cover 8 is kept open, it is tested in the step L 019 that the mark? LDEND is "O", and the command jumps to the step L 017 In the step L 017 it is again tested If the rear cover switch BACK is ON or OFF If the rear cover 8 is kept open, the CPU operates in a low power consumption mode in this state In this case, if the rear cover 8 is closed, it is tested in step L 017 that the back cover switch BACK is turned ON, and the LOADING sub-program which is

  shown in Figure 19, is called (in step L 018).

  Then, it is assumed that the CPU runs continuously in the low power consumption mode and that the power key 13 is pressed in this state. In this case, in the step L 012, it is tested that a change occurred in the state of the contactor

  PSW power supply and the command skips to step L 019.

  In step L 019 it is tested whether the PSW power contactor is turned ON or OFF As the power switch has been switched from OFF to ON by pressing the power button 13, it is tested in step L 019 as the power contactor

  is set to "ON", and the command goes to step L 020.

  In this step L 020, it is tested whether the mark? AUTORET is "O" or "1" The mark? AUTORET is set to "1" in the MAIN processing described below when the automatic re-entry of the objective has been executed. because the operating status of the camera has been maintained

unchanged for three minutes.

  In this description, it is assumed that

  the power supply was turned off by the power button 13 the last time, and the mark "AUTORET is set to" 0 "If the mark" AUTORET is set to "O", the sub-program INITIALIZATION SYSTEM EXPOSURE / SHOOTING is called in the step L 021 Then in the step L 022, the subroutine WIDE ANGLE 1 is called And the command goes to the top of the treatment MAIN The sub-program LARGE DISPLACEMENT

ANGLE 1 is described later.

  It is assumed that the power key is pressed before 30 minutes have elapsed since the? AUTORET "mark was set to" 1 ", ie,

  that the automatic re-entry of the objective has been made.

  Then, the previous state of the PSW power contactor stored in the memory is compared to the current state of the PSW power contactor in the step L 012, and it is tested whether a change in the state of the power contactor PSW. PSW supply has occurred and the control jumps to step L 019, in which it is tested whether the PSW power switch is turned ON or OFF As the PSW power switch has been turned ON by pressing the power button 13, the control jumps to step L 020, and is tested if the mark? AUTORET is set to "V" or "0" As the mark? AUTORET is maintained by being at "1" until thirty minutes elapse after three minutes have elapsed, it is tested in step L 020 that the mark? AUTORET is set to

  "1", and the processing of steps L 023 to L 026 is executed.

  In step L 023, the? AUTORET? Mark is set to "O" In step L 024, the display processing of the exposure system is executed In step L 025, the display processing of the system In step L 026, a sub-program RESTORE LENS POSITION is called By performing steps L 023 to L 026, the operating state of the camera is placed in the state immediately before the school year

  automatic lens operation is performed.

  lIn the LOADING program, in the LOADING subprogram, the exposure system is set to AUTO and the shooting system is set to VIEW-BY-VIEW shooting in step LD 1 as shown in the figure In addition, the interval start time and the interval time are initialized and are respectively set to ten seconds (in step LD 2). Next, the mark? LDEND which indicates

  the end of loading is set to "1" (in step LD 3).

  The winding pulse counter is set to "17" (in step LD 4) in order to feed the film according to the predetermined number of blanks. Then, the sub-program COUNT WINDING PULSES, which is described below, is called (in step LD 5) When the WINDING PULSES COUNT sub-program has been successfully completed, the processing of steps LD 6 to LD 8 of the loading program is carried out However, in the case where the sub-program COUNT WINDING PULSES is in failure, the implementation of steps LD 6 to LD 8 of the program

loading is interrupted.

  In this description, it is assumed that the sub

  WINDING PULSE COUNT program was successfully completed Then the film counter was set to "1" in step LD 6, the sub-program DISPLAY NUMBER OF VIEWS is called, and the mark? FLEXZ which indicates that the film has loaded is set to "1" (in steps LD 7 to LD 8) Then the command is returned to the position at which the sub

  program had been called in the LOCKOUT program.

  It should be noted that an error in the WINDING PULSE COUNT sub-program means a fault in the loading. In this case, the procedure for setting up the film, that is to say, opening the rear cover 8 , repositioning a film, and closing the lid

  back 8 must be performed by a photographer.

  Figure 20 is a flowchart of the WINDING PULSES COUNT sub-program which is called in the LOADING sub-program (described above) and in the WINDING program (described below). This is a subroutine for detecting the amount of film fed by detecting the winding pulses output in response to

the feeding of the film.

  When this subroutine starts, a mark? WPCST indicating the pulse counting program is set to zero in the step W Pl and the winding motor is set to

  forward rotation in WP 2.

  In a loop from step WP 3 to step WP 12, it is tested whether the initial position for the start of the winding pulses appears within a period of 1.5 seconds with the test of the states of the winding pulse

  WP and the back cover switch.

  When the rear cover switch is set to ON, the command jumps from WP 8 to WP 9 since the? WPCST mark is set to "O" immediately after the start So, if the winding pulse WP is set to "1" then the command returns to step WP 4 before the time has elapsed after the change of the mark? WPCST (in step WP 10) and the wait of 10 ms in step WP 11 As the loading and winding are completed after the WP winding pulse has been set to "1", if the previous processing has been successfully completed, the WP 11 and WP 1 O steps are executed as above However the processing can be terminated with the winding pulse WP being set to "O" due to some cause In such a case the steps WP 10 and WP 11 are skipped and the contactor input (step WP 4) is restarted in a relatively short period of time, and the change of the pulse of WP winding from "O" to "1"

and expected.

  After the "WPCST" mark has been set to "1", the command skips from WP 8 to WP 13, and is tested if a change in WP winding pulse

happened or not.

  If there is no change in the winding impulse WP the control jumps to the step WP 4, and a processing loop is constituted In the case where the timer of the timer of 1.5 seconds has elapsed without no change in the winding pulse WP, the brake of the winding motor is applied in the step WP 7, and the control returns to the position where the sub-program COUNT WINDING PULSES has been called after the display of the value "Fault" return When the rear cover 8 is opened, the winding motor brake is applied after the WINDING SYSTEM INITIALIZATION subroutine is completed, this initialization routine is used to erase marks relating to the film • LDEND? FLEXZ and? REWEND, restoring the movie counter and setting OFF the number display

of views.

  If the winding pulse WP is changed, it is detected later in step WP 14 if it has been changed from "O" to "1" or "1" to "O" If the winding pulse Wp is changed from "O" to "1", the predetermined winding pulse counter WPC is decremented in step WP 16, and the motor brake is applied in step WP 17 when the winding pulse counter WPC becomes "O" Then the command returns to the position at which the subroutine was called after the poster of the

return value "Success".

  In the case where the winding pulse counter WPC is not "O" or if the winding pulse is changed from "1" 1 t to "0", the command jumps to step WP 3 after having waited for 10 ms in step WP 15 and

  restarts the timer for 1.5 sec.

  Queues for 10 ms in WP 11 and WP 15 are treatments for reducing the influence resulting from erroneous inputs due to bouncing, with the input of an inhibition signal for the period in which the signal is not theoretically modified, from the point of change of the pulse of

WP winding.

  FIG. 21 is a flowchart showing the INTERRUPT subprogram. This process is called in response to an interrupt signal which is generated at an interval of 50 ms. The interrupt routine is the process relating to the display and a treatment

  incrementing a temporary timer.

  In the step IR 1, an INT timer which is used to count down the time for interval shooting and the shooting with automatic delayed release, is incremented. In step IR 2, other timers, such as than a 30-minute timer in

  the LOCK program, are incremented.

  Then, in the step IR 3, the implementation of the flashing of a green lamp and a red lamp is executed This operation is the operation to flash the green lamp to draw attention to a short distance and the red lamp for an indication of use of a flash at a rate of 4 Hz, in the

  Ma NDE AEAF COM program described later.

  Step IR 4 is a treatment to test the

  triggering a permanent timer of 0.5 seconds.

  If the permanent timer is triggered, the operation following step IR 5, inclusive, is executed. Therefore the operation following step IR 5 is executed once every 10 times that the INTERRUPT subprogram is called. In steps IR 5 and IR 6, the permanent timer is restarted, then the other temporary timers

are incremented.

  In steps IR 7 to IR 10 the display of the remaining time of the interval time is allowed. The remaining time of the interval time is displayed if the exposure system is placed in the AUTO mode and the system

  is set in the INTERVAL mode.

  In step I R 11, the flashing operation of the LCD is executed, thus causing the interval sign, the sign of the automatic trigger to

  delay, etc., flash at the frequency of 1 Hz.

  It is not necessary that the implementation of the steps IR 5 to IR 11 is frequently performed. Moreover, if the processing was executed with each INTERRUPTION subprogram, the execution time of the INTERRUPTION subprogram would be lengthened thereby causing a disturbance. therefore, the practical execution of this INTERRUPT subprogram takes place at an interval of 0.5 seconds. When the INTERRUPT subprogram is completed, the command returns to the

  point o the subroutine had been called.

  MAIN Processing Figure 22 and Figure 23 show the MAIN treatment This process is performed repeatedly when the camera's operating status is set to ready for shooting (operational status) by the maneuver the power key

* 13.

  First, the three-minute timer is started (in MA step 1) This three-minute timer refers to the automatic return of the lens If the operating status of the camera was not modified for three minutes, the objective is returned to the retracted position Then in step MA 2, a SELEMODE mode selection counter (hereinafter referred to simply as "SELEMODE") is set to "O" The SELEMODE is used when the shooting mode such as shooting with automatic shutter release, interval shooting, etc., is selected And then the contactor information is stored in the camera.

memory (at step MA 3).

  Next, a SWSEN mark is set to "O" (in MA step 4). The? SWSEN mark is examined when tested whether photometry is allowed or not When? SWSEN is set to "1", the treatment photometry is allowed to be executed While when? SWSEN is set to "O", photometry processing is forbidden So, it is tested whether the camera system is or not the rewind-forced mode (in step MAS) If the shooting system is selected in a mode other than the REWIND-FORCE mode, the command skips to step MA 6, in which it is tested whether the? REWEND mark is set to "1" or not. The? REWEND mark is set to "1" when rewinding the film is complete, while it is set to "O" when rewinding the film is not completed It is tested if the previous state of the photometry switch stored in the memory is ON in step MA 7 when the mark? REWEND is tested to be at " O "in step MA 6 When the previous state of the photometry switch stored in the memory is OFF, the mark" SWSEN "is set to" 1 "in step MA 8 If the previous state of the photometry contactor memorized in the memory is tested to be ON in step MA 7, step MA 8 is skipped and step MA 9 is executed This is because a change in the state of the photometry switch can not be detected if the shutter button is held pressed, and therefore, the? SWSEN mark is set to "1" after

  the photometry switch has been set to OFF.

  When it is tested in step MA 6 that the mark "REWEND" is "1", the steps MA 7 and MA 8 are skipped, and the step MA 9 is executed Thus, in the case where the film is rewound , the photometry treatment is forbidden. If it is tested in step MA 5 that the shooting system is placed in the REWIND-FORCE mode, the command skips steps MA 6, MA 7 and MA 8, and step MA 9 is executed, in which the REWEN mark is set to 0 The REWEN mark is examined when it is tested whether forced rewinding is allowed or not In step MA 10, it is tested whether the shooting system is not placed in the REWIND-FORCE mode If the camera is set to REWIND-FORCE mode, it is tested in the M All step if the previous state of the

  Trigger stored in the memory is ON or OFF.

  When the previous state of the trip contactor is

  OFF, the REWEN mark is set to "1" (in step MA 12).

  Then the step MA 13 is executed When the previous state of the trip contactor stored in the memory is ON, the step MA 12 is skipped and the step MA 13 is executed. This is because a change in the state of the trigger contactor can not be detected if the shutter button is held down, and therefore the REWEN mark is set to "1" after the trip contactor is set to OFF In step MA 10, if the shooting system is placed in a mode other than the REWIND-FORCE mode, the steps

  M Aile and MA 12 are skipped and the step MA 13 is executed.

  Thus, forced rewinding is prohibited when the camera is set to a mode other than

REWIND-FORCE.

  In step MA 13, the "ZOOMEN" mark is set to "O".

  The? ZOOMEN? Mark is examined when it is tested whether a plan change operation is allowed or not and then it is tested in step MA 14 if the previous state of the TELE zoom telephoto switch stored in memory is OFF or ON When the previous state of the TELE zoom telephoto switch is OFF it is tested in step MA 1 S if the previous state of the WIDE zoom wide angle switch stored in the memory is OFF or ON When the previous state of the WIDE zoom wide-angle switch is OFF, the "ZOOMEN" mark is set to "1" in step MA 16 Then, step MA 17 is executed In this case, if the telephoto contactor the TELE zoom is set to OFF and if the WIDE zoom wide angle switch is set to OFF, the zoom lever 12 is placed in the neutral position of the zoom lever When the TELE zoom telephoto the memory is ON, the s steps XA 15 and MA 16 are skipped and step MA 17 is executed When the previous state of the WIDE zoom wide angle switch is ON, step MA 16 is skipped and

step MA 17 is executed.

  Therefore, since the zoom lever 12 is placed

  in its neutral position, the "ZOOMEN" mark is set to "1".

  When the zoom lever 12 is held in the direction of the TELE zoom telephoto switch or when the zoom lever 12 is held moved towards the WIDE zoom wide angle switch, the "ZOOMEN" mark remains at "O". step MA 17 the mark? TWEN is set to "O" The mark? TWEN is examined when tested if moving the lens to

  the telephoto end / wide angle is allowed or not.

  Then, it is tested in step MA 18 if the previous state of contactor TW stored in the memory is ON or OFF. When the previous state of contactor TW is OFF, the mark? TWEN is set to "1" in FIG. step MA 19 and the command jumps to the step MA 20 When the previous state of the switch TW is ON, the step MA 19 is skipped, and the step MA 20 is executed Since a change can not be detected if the TW key is held down, a "TWEN" mark is set to "1" after the TW switch has

been put on STOP.

  In step MA 20, the current states of the contactors are input In step MA 21, the previous states of the contactors stored in the memory are compared with the current states of the respective contactors If the previous states of the inputs of the contactors and the states Their currents are different, that is, when a modification of the contactors has occurred, the three minute timer is started (in the MA step 22), and the control jumps to the MA step 23. there is no change between the previous states and the current states, the command skips step MA 22 and is sent to

step RA 30.

  In step MA 23, it is tested if the timer time of three minutes is exhausted or not In the case where the timer time has elapsed, the mark? AUTORET is set to "1" in step MA 24 And the charge of the flash is prohibited (in the step MA 25), the objective is returned automatically to the retracted position (in the step MA 26), and the command is directed to the LOCK program Namely, if three minutes or more have elapsed without the operation of the power key 13, the shutter button 17, the zoom lever 12, the drive key 11, or the key TW, or without the opening / closing the rear cover 8, the lens will automatically be returned to the retracted position The subprogram RENTREE AUTOMATIC OBJECTIVE called in

step 26 is described later.

  The case where the timer of the three minute timer has not yet elapsed in the processing

MAIN is described below.

  In the case where the timer of the three minute timer has not elapsed, it is tested in the step MA 27 if the mark? REWEN is set to "1" or not When the mark? REWEN is at "1" when the shooting system is selected in the REWIND-FORCE mode, MA step 28 follows and is tested if the SWR trip contactor is set to ON or OFF In case the trip contactor is set to ON, the charging of the flash is prohibited (in the step MA 29) Then the command is sent to the sub-program REWIND (in the step MA 29) In this embodiment, if the trigger contactor SWR has changed from OFF to ON by the operation of the shutter button 17 the drive key 11 being kept pressed for more than three seconds or more, the forced rewinding operation is carried out Alternatively, if a predetermined period of time elapses with the workout key 11 and the shutter button 17 pressed simultaneously, the forced rewind can be performed It should be noted that the forced rewind is placed in the sub-program SETUP SYSTEM EXPOSURE / TAKING OF

VIEW.

  When it is tested in step MA 27 that the mark "REWEN" is set to "O", the step MA 31 is executed, in which it is tested whether the loading of the film has been completed or not by referring to the mark? LDEND If the film is not loaded, it is tested if the back cover switch BACK is set to ON or OFF (in step MA 32) If the back cover 8 is closed, charging the flash is prohibited (in step MA 33), the LOADING sub-routine is called (in step MA 34), and the command returns to the top of the MAIN processing (in step MA 35) When tested in step MA 32 that the rear cover 8 is open, the control jumps to the step MA 39 When it is tested in the step MA 31 that the film has been loaded, it tested in the step MA 36 if the Back cover switch BACK is set to ON or OFF When the rear cover 8 is open, the sub-programs SETUP SYSTEM EXPOS ITION / SHOOTING and WINDING SYSTEM INITIALIZATION are called (in the steps MA 37 and MA 38), and the command jumps to the step MA 39 When it is tested in the step MA 36 that the cover 8 is closed , the steps MA 37

  and MA 38 are skipped and the command skips to step MA 39.

  Therefore, in the case where the MAIN processing is performed loading the film having been completed and the back cover 8 is closed, the steps MA 31, MA 36 and MA 39 are executed sequentially In the case where the MAIN processing is executed with the rear cover 8, which was closed, having been opened, the steps MA 31, MA 36, MA 37, MA 38 and MA 39 are executed sequentially In the case where the MAIN treatment is carried out the rear cover being maintained opened, the steps MA 31, MA 32 and MA 39 are executed sequentially In the case where the main treatment is performed with the rear cover 8, which was open, having been closed, the steps MA 31, MA 32, MA 33 , MA 34 and MA 35

  are executed sequentially.

  In step MA 39, the previous state of the PSW power contactor stored in the memory is compared with the current state of the power contactor In the case where a change in the state of the power contactor s' is produced, the control jumps to step MA 40 It is tested in step MA 40 if the current state of the power contactor is ON or OFF If the power contactor is set to OFF, that is that is, the power switch has changed from ON to OFF, flash charging is prohibited (in step MA 41), the RENTREE OBJECTIVE subroutine is called (in step MA 42), and the command is directed to the LOCKOUT subroutine (in step MA 43) The RENTREE OBJECTIVE subroutine is described later In the case where the power supply is cut by a manual maneuver, the steps MA 40, MA 41, MA 42 and MA 43 are executed sequentially In the case where the power key 13 is maintained it is pressed while the MAIN processing is being performed, and when the power key 13 is released to be pressed, the command jumps to the MA 44 step through the

steps MA 39 and MA 40.

  In step MA 44, the subprogram SETUP EXPOSURE / SHOOTING SYSTEM which is described later

is called.

  The processing in step MA 45 is executed after this subprogram POSITIONING SYSTEM EXPOSURE / SHOOTING, is completed It is tested in step MA 45 if the mark? SELECT is set to "1" or "O" "This mark? SELECT is controlled in the sub-program SETUP EXPOSURE / SHOOTING SYSTEM If the setting of the shooting system times is performed, the mark? SELECT is set to" 1 "If the mark? SELECT is set to "O", the command jumps to step MA 46, and is tested if the mark? TWEN is set to "1" or "O" When the mark? TWEN is set to "1", it is tested (in step MA 47) if the TW switch is ON or OFF When the TW switch is ON, flash charging is prohibited (in step MA 48), the sub-program TELE-DIRECTION DISPLACEMENT / WIDE ANGLE is called (in step MA 49), and the command returns to the top of the MAIN processing (in step MA 50) It should be noted that da In the telescopic / wide angle sub-program, the zoom lens is forcibly moved to the telephoto end or the wide-angle end when the TW button 18 is operated. The detail of this is described later when the moving the lens

is described.

  When in step MA 46 the mark? TWEN is at "O", the step MA 51 is executed, and it is tested if the mark? ZOOMEN is set to "1" or "O" When the mark? ZOOMEN is set to "O", it is tested in step MA 52 whether or not the mark? SWSEN is at "O" If the mark? SWSEN is at "O", the charge control of the flash is carried out in the 'step

  MA 53, and the command returns to step MA 3.

  When tested in step MA 51 that the "ZOOMEN" mark is set to "1", it is tested (in step MA 54) if the TELE zoom telephoto switch is set to ON or OFF when the TELE telephoto switch is set to OFF it is tested (in step MA 55) if the wide-angle switch of the WIDE zoom is set to ON or OFF If the wide-angle switch of the WIDE zoom is set to OFF control jumps to step MA 52 Therefore, when the zoom lever 12 is in its neutral position in the plan change authorization state, the MAIN processing is executed by

  through steps MA 51, MA 54, MA 55 and MA 52.

  When the WIDE zoom wide angle switch is tested to be ON in the MA 55 step, it is tested (in the MA 56 step) if the zoom lens is or is not located at the wide angle end. zoom lens is not located at the wide-angle end, the flash charge is prohibited (in step MA 57), the sub-program ZOOM TO WIDE ANGLE is executed (in step MA 58), and the command returns to the top of MAIN processing (in step MA 59) Since there is no need to move the zoom lens to the wide-angle end when the zoom lens has been determined to be located at the far end angle in step MA 56, steps MA 57 and MA 58 are skipped and

step MA 53 is executed.

  Then, when it is tested in step MA 54 that the TELE zoom telephoto switch is set to ON, it is tested in step MA 60 if the zoom lens is located at the telephoto end. the zoom lens is not located at the telephoto end, the flash charge is prohibited (in step MA 61), the sub-program ZOOM TO TELEOBJECTIVE is executed (in step MA 62), and the command returns to the top of MAIN processing (in MA 63 step) Since there is no need to move the zoom lens to the telephoto end when the zoom lens has been determined to be at the telephoto end in step MA 60, the processing of steps MA 61, MA 62 and MA 63 is skipped and

step MA 53 is executed.

  That is, if the zoom lever 12 is moved in the direction of the arrow rn in Fig. 1, if the? ZOOMEN? Mark is set to "1", the zoom lens moves toward the side telephoto end until it reaches the telephoto end while if the zoom lever 12 is moved in the direction of the arrow r 2 in Fig. 1, the zoom lens moves towards the wide angle side until it reaches the wide-angle end The sub-program ZOOM TO WIDE ANGLE and the sub-program ZOOM TO

  TELEOBJECTIVE are described later.

  When it is tested in the MA 52 step that the "SWSEN" mark is set to "1", it is tested (in the MA 64 step) if

  the photometry switch is ON or OFF.

  Then flash charging is prohibited (in step MA 65), and the processing is directed to the AEAF COMMAND program

(in step MA 66).

  lSub program RETURN OBJECTIVE, etc. l Figure 24 shows the processing of the sub-programs RENTREE OBJECTIVE, AUTOMATIC RETURN OBJECTIVE, DISPLACEMENT WIDE ANGLE 1 and TELEOBJECTIVE DISPLACEMENT of the objective The points at which these sub-programs start are different, but the last half of the treatments is common Therefore, the same figure is used for their representations The subprogram RENTREE OBJECTIVE is called when the current is cut manually or when rewinding is started For example, the subroutine is called in step MA 42 of

MAIN treatment.

  First, "O" is placed in the memory MVPOS (in the step LM 1) The memory MVPOS is the memory for storing the position in which the objective is to be moved, which is used in common for the processing of the sub programs RENTREE AUTOMATIC OBJECTIVE, DISPLACEMENT

  WIDE ANGLE 1, AND TELE-TO-MOVEMENT.

  Then, the information stored in the memory MVPOS is compared with the current POS (in the step LM 2) The direction in which the objective is to be moved is different according to each of the treatments of automatic locking of the lens, WIDE ANGLE DISPLACEMENT 1, and TELE-DIRECTION DISPLACEMENT If the power supply is cut manually (in step MA 42), the current POS is larger than MVPOS (= 0), the rotation in the opposite direction of the zoom motor is performed (in step LM 3), and then the position of the objective is detected (in step LM 4) In the lens position detection processing, a modification of the zoom code ZCODE is continuously controlled while the engine is

  rotated by the use of POS and DIV.

  Then, the display of the focal length is executed (in step LM 5) Therefore, while the lens is being moved, the displayed focal length can be changed. Next, the current POS is compared with the information stored in the memory MVPOS (in the step LM 6) The processing in the steps LM 4 to LM 6 is repeated until the current POS is equal to the information stored in the memory MVPOS When the POS current is equal to the information stored in the memory MVPOS, the brake of the zoom motor is applied (in the step LN 7), then the command is returned to the point where the subroutine was called in the MAIN processing Thus, the lens is returned to the retracted position. The AUTOMATIC OBJECTIVE RENTREE subroutine is called in the MA 26 step of the MAIN processing as mentioned above In this subroutine, the current DIV is stored in the MDIV memory (in the LM 8 step) In this case, the information stored in the MDIV memory is used to determine the restoration position in the automatic restoration of the objective In step LM 9, "O" is stored in the memory MVPOS And the processing similar to the subprogram RENTREE OBJECTIVE is executed (in step LM 2, and steps LM 3 to LM 7) This subroutine has practically no difference from the RENTREE OBJECTIVE subprogram, except that the objective is automatically reset to the initial state. response to the next operation

power supply.

  The WIDE ANGLE DISPLACEMENT 1 is a subroutine for moving the objective located in the retracted position to the wide angle end, it is called in step L 022 of the LOCKOUT subprogram as described above in DISPLACEMENT WIDE ANGLE 1, "2" is stored in the memory MVPOS (in step LM 10), and the information in the MVPOS is compared with the current POS in the step LM 2 As the current POS is "O" with the power supply that has been cut off, the control jumps to step LM 11,

  o The forward rotation of the zoom engine is executed.

  Then, the position of the objective is detected and the focal length is displayed (in the steps LM 4 and LM 5) The steps LM 4 to LM 6 are repeated until the information

  stored in the memory MVPOS is equal to the current POS.

  When the information stored in the memory MVPOS is determined to be equal to the current POS in the step LM 6, the command jumps to the step in the step LM 7, and it returns to the point where the subroutine was called in the subprogram LOCKING Thus, the objective is brought to

  the wide angle end (POS = 2).

  Then, "4" is stored in the memory MVPOS in the sub-program TELE-JOB DISPLACEMENT (in step LM 12), and the information stored in the memory MVPOS is compared with the current POS As the information of the MVPOS is always larger than the current POS, the zoom motor is rotated forward (in step LM 11), then the detection of the lens position and the display of the focal length are performed (in steps LM 4 and LM 5) Then, the information

  stored in the memory MVPOS is compared with the POS.

  The steps LM 4 to LM 6 are repeated until the information stored in the memory MVPOS is equal to the POS. When they are determined to be equal to each other, the brake of the zoom motor (in FIG. step LM 7) is applied, and then the command returns to the point where the subroutine was called in the MAIN processing (in step

MA 50).

  Thus, the lens is forcibly moved towards the telephoto end in the TELE-TO-MOTION processing (in the MA 50 step) which takes place via a step TW 3 of the TELE / WIDE ANGLE DISPLACEMENT subroutine.

see Fig 26.

  lSub program AUTOMATIC LENS POSITION RESTL In FIG. 25, a AUTOMATIC LENS POSITION RESTORATION subroutine is called in step L 026

  of the LATCH program is shown.

  In this sub-program, the forward rotation of the

  zoom engine is first executed in step LR 1.

  Then, the command jumps to step LR 2, in which the lens position detection processing is performed. Then, the subprogram FOCAL DISTANCE DISPLAY is called in step LR. Current DIV is compared with the information of the previous DIV stored in memory MEMDIV The processing of steps LR 2, LR 3 and LR 4 is repeated until the current DIV

  is equal to the information stored in the memory MEMDIV.

  If it is tested in step LR 4 that the current DIV is equal to the information stored in the memory MEMDIV, the command jumps to step LR 5, in which the brake of the zoom motor is applied and the command is returned to the point where the subroutine was called in the program LOCK The lens can be moved to the position corresponding to the previous DIV which is the position in which the lens was immediately before the automatic return of the lens in the

  retracted position has been executed.

  lThe TELE-TO-WIDE / WIDE ANGLE DISPLACEMENT PROGRAM The teletext / WIDE ANGLE REMOTE sub-program is called in step MA 49 as described above. This sub-program TELEOBJECTIVE / WIDE ANGLE DISPLAY is used to determine if the lens is moved from the camera. on the telephoto side or on the wide-angle side when the TW button 18 is operated as shown in FIG. 26 First, it is tested in step TW 1 if the DIV is greater than or equal to "BH" when the DIV is greater than or equal to "BH", the sub program WIDE ANGLE 2 is called in step TW 2 When it is determined that the DIV is smaller than "BH" in step TW 1, the sub TELEOBJECTIVE TRAVEL program is called

(in step TW 3).

  In these subprograms, the lens is moved farthest from the wide-angle end and the end

  telephoto relative to the current goal position.

  That is, if the lens is located relatively close to the wide-angle end, the lens will be shifted to the telephoto end, whereas if the lens is located relatively close to the telephoto end,

  the lens will be moved to the wide-angle end.

  Variants of the sub-program TRAVEL

  TELEOBJECTIVE / WIDE ANGLE are described below.

  FIG. 27 is a flowchart representing a first variant of the sub-program TELE / WIDE ANGLE DISPLACEMENT. In this variant, it is judged in step TW 51 if the POS is "2". When the POS is equal to "2", the command jumps to TELE-TO-MOTION (in step TW 52) When the POS is tested to be not equal to "2" in step TW 51, it is tested in step TW 53 if the POS is equal to "4" When tested that the POS equals "4" in step TW 53, the control proceeds to WIDE ANGLE DISPLACEMENT 2 (in step TW 54) When the POS is tested is not equal at "4" in step TW 53, it is tested (in

  step TW 55) whether or not the DIV is greater than "BH".

  When the DIV is greater than or equal to "BH" in step TW55, the sub-program TELEOBJECTIVE SHIFT is called (in step TW 56) when it is tested that the DIV is smaller than "BH" in step TW 55, the sub-program

  DISPLACEMENT WIDE ANGLE 2 is called (in step TW 57).

  According to the first variant, when the lens is at the telephoto end, the lens is brought to the wide-angle end, whereas if the lens is at the wide-angle end it is brought to the telephoto end when the lens is located at a position between the wide-angle end and the telephoto end, the lens is brought to the end, the telephoto end or the wide-angle end, which is closest to the current position of the lens Namely, if the lens is located near the wide-angle end, the lens is brought to the wide-angle end If the lens is located near the end

  telephoto, it is brought to the telephoto end.

  FIG. 28 shows a flowchart of a second variant of the sub-program TELEOBJECTIVE / WIDE ANGLE DISPLACEMENT. In the second variant, it is tested (in step TWT 1) whether or not the POS is equal to "2". If the POS is tested to be equal to "2" in step TWT 1, the subprogram

  TELEOBJECTIVE MOVEMENT is called (in step TWT 2).

  If it is tested that the POS is not equal to "2", the sub program WIDE ANGLE 2 is called (in step TWT 3) According to this second variant, when the objective is located at the end wide angle, it is brought to the telephoto end If the lens is not located at the wide-angle end, it will always be brought to

the wide angle end.

  FIG. 29 is a flowchart representing a third variant of the sub-program TELE-OBJECTIVE / WIDE-ANGLE DISPLACEMENT. In this process, it is tested in step TWV 1 if the POS is equal to "4". When the POS is tested, it is equal to "4". 1 in the step TWV 1, the sub program WIDE ANGLE 2 is called (in the step TWV 2) If it is tested that the POS is not equal to "4" 1, the sub-program TELEOBJECTIVE DISPLACEMENT is called

(in step TWV 3).

  According to the third variant, if the objective is located at the telephoto end, it is brought to the wide-angle end, whereas if the objective is not at the end

  telephoto, it will be brought to the telephoto end.

  The following is a flowchart representing the sub-program WIDE ANGLE SHIFT 2, which is called in FIG.

  sub program TELEBJECTIVE TRAVEL / WIDE ANGLE.

  First, the zoom motor is rotated in reverse (in step ZW 1). Next, the processing of the detection of the position of the objective and the processing of the display of the focal length are carried out ( in steps ZW 2 and ZW 3) Then, it is tested (in step ZW 4) whether the POS is equal to "1" Then, the steps ZW 2 to ZW 4 are executed repetitively until that the POS is equal to "1" When tested in step ZW 4 that the POS is equal to "1", the zoom motor is rotated forward (in step ZW 6 ) after a wait of 50 ms (in the step ZW 5) Then, the processing of detection of the position of the objective is carried out (in the step ZW 7) In the step ZW 8, it is tested if the POS is equal to "2" Steps LM 7 and LM 8 are repeated until the P Os equals "2" When the POS is tested equal to "2", the zoom motor brake is applied , and the command is returned to the point where the

subprogram had been called.

  After this sub program WIDE ANGLE 2 is completed, the lens will be located at the wide-angle end. In this subroutine, the lens is driven to be brought to the position corresponding to the POS equal "1" by the rotation of the zooming motor in reverse, and then the lens is moved back to the wide-angle end (POS = 2) by the forward rotation of the zoom motor From the game may appear in the mechanical system when the zoom motor is rotated in reverse, On the other hand, when the zoom motor is rotated forwards no play occurs in the mechanical system Therefore, when the rotation of the zoom motor is controlled as

  described above, the game can be avoided.

  lThe ZOMM program to TELEOBJECTFl The zoom motor is rotated (in step ZN 1) as shown in Figure 31, when the zoom lever 12 is moved in the direction indicated by the arrow rn (the side of the telephoto end) The next stop position for the stepwise movement of the lens is stored in a STDIV memory (in step ZN 2) The STDIV memory is a memory for storing the next stop position when step zoom is used If the lens is moved towards the telephoto end, the DIV on the telephoto end side is stored in the STDIV memory, relative to the current DIV Then, the? STEP mark is set at "1" (in step ZN 3) The? STEP mark is used to test whether the selected lens shift is the stepwise zoom move or the continuous zoom move when the ZOOM TO TELEOJECT program or the Z sub-program OOM TOWARDS WIDE ANGLE is performed In the camera incorporating the present invention, the zoom lever 12 is so composed that zooming stepwise motion can be selected when the zoom lever is moved slightly from its neutral position, and the continuous zoom shift can be selected when the zoom lever 12 is moved further from its position moved halfway Therefore, the? STEP mark is set to "1" as a default value considering that the displacement step zoom has been selected. Then, the lens position detection processing and the focal length display processing are performed (in steps ZN 4 and ZN 5), and it is tested (in step ZN 6) if the TELE zoom telephoto switch is ON or OFF When TELE zoom telephoto switch is OFF, the

  Zoom motor brake is applied (in step ZN 7).

  Then, the command is returned to MAIN processing (in step MA 63) Namely, although a photographer releases the zoom lever 12 after slightly manipulating the zoom lever, moving the lens stops immediately When the TELE zoom telephoto switch is ON, it is tested (in step ZN 8) if the POS is equal to "4" When it is tested in step ZN 8 that the POS is equal to "4", the zoom motor brake is applied (in step ZN 7), and the command is returned to MAIN processing (in step MZ 63) This is because, when the POS is equal to

  "4", the lens was brought to the telephoto end.

  When tested in step ZN 8 that the POS is not equal to "4", it is tested (in step ZN 9) if the zoom switch is ON or OFF. MVSW zoom mode is OFF, the mark? STEP is set to "O" Then the command is returned to the lens position detection processing (in step ZN 4) As long as the MVSW zoom mode switch is OFF, the steps ZN 4 to ZN 6 and the steps ZN 8 to ZN 10 are repeated, thereby causing the zoom lens to come out continuously in response to the displacement of the lens, the distance focal length

which is displayed is changed.

  If the MVSW zoom mode switch is set to ON, the command jumps to step ZN 11, in which it is tested whether or not the? STEP mark is equal to "1" As the? STEP mark has been set to " O "when the lens was going out continuously, the step ZN 12 is skipped and the brake of the zoom motor is applied (in the step ZN 13). Then, the command is returned to the MAIN processing (in step MA 63) Thus, if the continuous displacement of the zoom of the lens is selected, the displacement of the lens can be stopped only by bringing the zoom lever 12 to the position ordering the zoom movement not to not or where

the TELE end is reached.

  When, when executing the ZOOM TO TELEPHOTO program, the TELE zoom telephoto switch and the MVSW zoom mode switch are kept ON, the control jumps to step ZN 11 using the test processes in step ZN 6, ZNB and ZN 9 The processing in steps ZN 6, ZN 8 and ZN 9 corresponds to the case where the continuous zooming movement is not selected, and the? STEP mark is equal to "1" Therefore the command jumps in step ZN 12 for testing whether the current DIV is equal to the information stored in the memory STDIV When the information of the current DIV is different from the information in the memory STDIV, the steps ZN 4 to ZN 6, the steps ZN 8, ZN 9, ZN 11 and ZN 12 are executed repeatedly until the current DIV is equal to the information stored in the STDIV memory. If it is tested that the current DIV becomes equal to information in the STDIV memory in step ZN 12, the command In step ZN 13, the zoom motor brake is applied, and the command is returned to the MAIN processing (in

step MA 63).

  In MAIN processing, when the "ZOOMEN" mark has just been set to "O" (in step MA 13), and the TELE zoom telephoto switch is held in the ON position, steps MA 15 and MA 16 are skipped and the processing following step MA 17, inclusive, is executed Therefore, when the control reaches step NA 51, the steps MA 54 and MA 55 are skipped. Therefore, if the zoom stepwise of the lens is selected, the zoom can not be shifted unless the zoom lever 12 is returned to its neutral position and the switch

  teletext zoom TELE is set to OFF.

  lOf the ZOOM PROGRAM TO WIDE ANGLEl If the zoom lever is moved from the neutral position to the wide-angle side (in the direction of arrow r 2 in Figure 1), the zoom motor is rotated in. reverse (in step ZR 1) as shown in Figure 32 And as the wide zoom angle is selected, the DIV from the stop position to the next step of the wide angle side relative to the current DIV is memorized in the STDIV memory (in the ZR 2 step) Then, the? STEP mark is set to "1" (in the ZR 3 step) The processing of the detection of the position of the objective and the processing of the display of the focal length are executed (in the steps ZR 4 and ZR 5), and it is tested (in the step ZR 6) if the contactor of large

  WIDE zoom angle is set to ON or OFF.

  When the wide-angle WIDE zoom switch is set to OFF, the zoom motor is rotated forward, after waiting 70 ms (in steps ZR 7 and ZR 8) to eliminate the game. mechanics of the mechanical system Then, the processing of detection of the position of the objective is executed (in the step ZR 10) after waiting for 50 ms (in the step ZR 9) Then, the command jumps to the step ZR 11, in which it is tested whether or not the POS is "1" In this case, the standby processing (in steps ZR 7 and ZR 9) is performed in order to prevent the display of the focal length to be increased, despite the fact that a large zoom angle is

  selected, because of the game elimination treatment.

  When it is tested that the POS is not "1" in the step ZR 11, the focal length is displayed (in the step ZR 12 '), the zoom motor brake is applied (in the step ZR 13 '), and the command is returned to MAIN processing (in step MA 59) Thus, when the zoom lever 12 is released after being operated, the game elimination processing is executed. Then, if the POS is not equal to "1", the displacement of the objective is stopped If it is tested in step ZR 11 that the POS is equal to "1" after the elimination treatment of the game, the treatment detection of the position of the objective is executed (in step ZR 12) Then, it is tested (in step ZR 13) if the POS is equal to or not equal to "2" Steps ZR 12 and ZR 13 are repeated until the POS equals "2" The zoom motor brake is applied (in step ZR 14) when tested that the current POS is "2" Then the command is returned MA (at step MA 59) As above, the lens is positioned at the wide-angle end Even if the zoom lever 12 is released (placed in its neutral position) after being slightly manipulated, moving the lens can be stopped immediately. When it is tested that the WIDE zoom wide angle switch is ON in step ZR 6, it is tested later (in step ZR 15) if the POS is equal to "1" when the POS is equal to "1", the forward rotation drive processing of the zoom motor is executed after a wait of 50 ms (in the steps ZR 16 and ZR 17) and the position detection processing of the goal is executed (in step ZR 12) Then, it is

  tested (in step ZR 13) if the POS is equal to "2" or not.

  If the POS is not equal to "2", the steps ZR 12 and ZR 13 are executed repeatedly. If the POS is equal to "2", the brake of the zoom motor is applied (in step ZR 14 ) when the current POS is equal to "2", and the command

  is returned to MAIN processing (in MA 59).

  In the processing of steps ZR 16, ZR 17, ZR 12 to ZR 14, clearance elimination at the wide-angle end is performed. When tested in step ZR 15 that the POS is not equal to "1", it tested (in step ZR 18) whether the MVSW zoom mode switch is ON or OFF when the MVSW zoom mode switch is on

  OFF, the mark? STEP is set to "O" (in step ZR 19).

  And then, the command is returned to the lens position detection processing (in step ZR 4), and the processing of steps ZR 4 to ZR 6, ZR 15, ZR 18 and ZR 19 is repeated as long that the MVSW zoom mode switch remains OFF, thereby causing the zoom lens to be continuously shifted to the camera body. The focal length display is changed in response to the movement of the zoom lens. objective Namely, the displayed focal length of the lens is decreased in response to the displacement of

the lens of the wide-angle side.

  If the MVSW zoom mode switch is set to ON, the command jumps to step ZR 20, in which it is tested whether or not the? STEP mark is equal to "1" As the? STEP mark is set to " O "when the lens is moved continuously towards the camera body, processing similar to the treatment when the WIDE wide-angle zoom switch is set to OFF, that is, the processing of steps ZR 7 to

  ZR 14 or steps ZR 7 to ZR 13 'is executed.

  When the WIDE wide zoom angle switch is turned ON and the MVSW zoom mode switch is kept ON, the processing reaches step ZR 20 via steps ZR 6, ZR 15 and ZR 18 unless that the POS is equal to "1" This processing in steps ZR 6, ZR 15 and ZR 18 corresponds to the case where the continuous displacement of the zoom has not been selected In this case, the mark? STEP is maintained equal to " 1 ", and the command jumps to step ZR 24, in which it is tested whether the current DIV is or

  not equal to the information stored in the STDIV memory.

  When the current DIV is different from the information stored in the STDIV memory, the command skips to the step ZR 4, and the processing in the steps ZR 4 to ZR 6, the steps ZR 18, ZR 15, ZR 20 and ZR 24 is executed repeatedly Then the command jumps to step ZR 25 when the DIV is tested to be equal to the information stored in the

STDIV memory in step ZR 24.

  In the step ZR 25, a waiting process for a wait of 50 ms is executed Next, the forward rotation of the zoom motor (in the step ZR 26) and the processing of the position of the objective (in the step ZR 29) are executed In the step ZR 28, it is tested if the current DIV is equal to the information stored in the STDIV memory The processing of the steps ZR 27 and ZR 28 is repeated until that the current DIV is equal to the information stored in the memory STDIV When the current DIV is equal to the information stored in the memory STDIV, the brake of the zooming motor is applied (in the step ZR 29), and the command is returned to MAIN processing (in

step MA 59).

  If the mark? ZOOMEN has just been set to "O" (in step MA 13) in MAIN processing, and if the wide-angle switch of WIDE zoom and held ON, the processing of step MA 16 is skipped and the processing that follows the MA 17 step and executed Therefore, when the control reaches the MA 51 step, the steps MA 55 and MA 54 are skipped Therefore, when the stepwise movement of the objective is selected, moving to the next step can not be performed unless the zoom lever 12 is released at night and the wide-angle WIDE zoom switch has been placed

previously on STOP.

  lSub program SETTING THE EXPOSURE / SHOOTING SYSTEM Fig. 33 is a flowchart showing a subprogram EXPOSURE / SHOOTING SYSTEM SETUP, which is called in step MA 44 of MAIN processing This is a program for setting up place the exposure system mentioned above and the camera according to the inputs of the EXPSW mode switch; DRIVSW drive contactor, and

SLSW selection.

  When this subroutine starts, the status of the? SELECT mark is tested in step ET 1 The? SELECT? Mark is set to "1" when only the SLSW selector switch is turned ON among the contactors used for setting in place in the previous setup procedure, and it is cleared if the SLSW Selector Switch is set to OFF after setting up

  variables that is described later.

  If the mark? SELECT is equal to "O", it is tested that the processing is not in the sub-program SETTING VARIABLES, and the display of the system exposure / shooting and executed in steps ET 2 and AND 3, TELE zoom telephoto zoom switch and WIDE zoom wide angle switch status are tested in steps ET 4 and ET 5 If either TELE zoom telephoto or contactor WIDE wide-angle zoom is turned ON, it is tested that zoom processing is performed And, in step ET 6, a three-second timer that is used to make a test for performing forced rewind is started And in step ET 7, the mark? MDSWOF is set to "O", which means that the DRIVSW drive switch, the SLSW selector switch, the SWS photometry switch, the TELE zoom telephoto switch and the wide-angle switch of the WIDE zoom are set to OFF, is the command returns to the point where the subroutine was called in MAIN processing The mark? MDSWOF is set to "1" when all the above switches are set to OFF, and it is used to detect the point o the contactor EXPSW mode and contactor

  DRIVSW have gone from OFF to ON.

  If both the TELE zoom telephoto switch and the WIDE zoom wide angle switch are set to OFF, the? MDZMOF mark indicates that both the TELE zoom telephoto switch and the camera's wide-angle switch are in the OFF position. zoom WIDE are on OFF is set to "1", then the state of the SWS photometry switch is tested in step ET 9 The mark? MDZMOF is used to detect the point o TELE zoom telephoto switch or contactor zoom WIDE has been switched from OFF to ON in a VARIABLES SETUP subroutine which is described later If the SWS photometry switch is turned ON, the control is returned to the point where the subroutine was called in MAIN processing via steps ET 6 and ET 7 without setting up exposure / shooting systems

used in the AEAF treatment.

  If any of the above three contactors is OFF, the command skips to steps ET 10 and E Tl I, and the status of the EXPSW mode contactor and the DRIVSW drive contactor is tested If the EXPSW mode switch and the DRIVSW drive switch are OFF, the forced rewind mode is stopped in the AND step 12 if it is performed Then, after the shooting system display processing is performed in the step AND 13, the three-second timer is restarted in step

AND 14.

  In steps ET 15 to ET 17, the state of the selector switch is detected The mark? SELECT is set to "1" and the mark? MDSWOF is set to "O", if the selector switch SLSW is ON, if the selector switch SLSW is set to OFF, the mark? MDSWOF is set to "1", then the command is returned to the point where the subroutine was called in MAIN processing As the mark? SELECT is set to 1 ", it is tested that the VARIABLES SETTING subroutine is being executed and the zoom processing is skipped in the MAIN processing This is because, the TELE zoom telephoto switch and the wide-angle switch of the WIDE zoom are used together in the ZOOM TO TELEVISION / ZOOM TO WIDE ANGLE subprograms on the one hand, in the VARIABLES SETUP sub-program, on the other hand, it is necessary to clarify

  in which subroutine the implementation is carried out.

  If the TELE zoom telephoto switch, WIDE zoom wide angle switch and SWS photometry switch are set to OFF, and the EXPSW mode switch is turned ON, the control goes from step ET 10 to step ET 18, and the timer of three seconds

is started.

  In step ET 19, if the mark? MDSWOF is set to "1", i.e., only when both the EXPSW mode switch and the DRIVSW drive switch are set to OFF in the previous set-up processing, the command jumps to steps ET 20 to ET 26, and the implementation is executed Therefore, any modification of the set-up would be accepted after the switch has been previously set to OFF. set up is performed while one of the contactors is turned ON in the previous set-up, the set-up is constantly changed when the key is held pressed continuously, which leads to a

  disturbed implementation of the camera.

  If it is tested in step ET20 that the EXPSW mode switch is ON, the increment and processing of the EXPMODE counter limit, and the display processing of the exposure system are performed in the steps ET 21 to ET 22 If the mode switch EXPSW is set to OFF, in this case the drive contactor DRIVSW is set to ON, and the steps ET 24 to ET 26, the increment and the processing of the limit of the DRIVEMODE counter and the processing of the display of the shooting system, are performed In such a case, after setting the "o" mark? MDSWOF in step ET 9 to indicate that the mode switch EXPSW and the DRIVSW drive contactor is ON, the command is returned to the point where the subroutine was called in MAIN processing In this case, the limit processing is a process such that the EXPMODE counter is set to "OH "and the DRIVEMODE counter is set to" 000 OB "when the EXPMODE counter is incremented beyond 112 H "or that the DRIVEMODE counter is incremented beyond" n O 1 Bg If it is tested in step ET 10 and in step ET 11 that the mode contactor EXPSW and that DRIVSW drive contactor are OFF and ON, the state of the SLSW selector contactor is tested in step ET 27 In case the SLSW selection contactor is ON, the command jumps to step AND 18 In the case where the selector switch SLSW is OFF, it is tested whether the timer of the three-second timer which was started in the steps ET 6, AND 14, or ET 18 has elapsed or not. progresses to the AND step 19 until the three-second timer is elapsed When the three-second timer has elapsed, the camera is placed in the REWIND-FORCE mode. lSub program VARIABLE SETTINGSl Figure 34 is a flowchart of the VARIABLES SETTING subroutine which is called from step ET 1 of the subroutine EXPOSURE / SHOOTING SYSTEM SETUP This subprogram is executed only when the selection switch SLSW was ON in the previous treatment of setting up the exposure / shooting system In this sub-program SETTING VARIABLES there are three variables such as the number of shots for trigger shooting automatic delay, the instant of departure of

  the interval and the duration of the interval.

  Each of the variables, corresponding to the information stored in the memory, and to the indication displayed in the LCD display 19 is shown in the tables below:

TABLE 1

  Number of Views for Information Indication Variable Auto Trigger

1 OH 1 EX

2 1 H 2 EX

3 2 H 3 EX

4 3 H 4 EX

4 H 5 EX

TABLE 2

  Information Start Time Indication Variable Interval Time Interval Seconds OH los seconds 1 H 20 s seconds 2 H 30 s seconds 3 H 40 s seconds 4 H 50 s 1 minute 5 H 1 m 2 minutes 6 H 2 m 3 minutes 7 H 3 m 4 minutes 8 H 4 m 9 hrs 1 hr 9 hrs 1 hrs 10 hrs 12 hrs 1 hrs 12 hrs 24 hrs 1 hrs 24 hrs Step P 51 in Fig. 34 represents a sub-program VARIABLE SELECTION to select the variables and which is shown in FIG. 35 The VARIABLE SELECTION subroutine is a process for selecting one of the memory information to be modified from among three sets of memory information relating to the number of frames for taking view with the automatic delay trigger, the start time of the interval and the duration of the interval The selection of the respective information corresponds to the variable SELEMODE SELEMODE = O corresponds to no variable, SELEOMDE = 1 corresponds to the number views for taking view with automatic delayed release, SELEMODE = 2 refers to the start time of the interval,

  SELEMODE = 3 corresponds to the duration of the interval.

  If the shooting system is fixed for automatic self-timer shooting, the SELEMODE is set to "1" in the VARIABLE SELECTION subprogram, the "Variable exists" return value is set, and the processing is returned to the point where the subroutine was called in the subroutine SETTING VARIABLES If the camera is set for interval shooting, the SELEMODE is changed to "3", if it is common way set to "2", otherwise the SELEMODE is set to "2", and the return value "Variable exists" is enabled and the command is

  referred to the point where the subroutine had been called.

  In the case where the camera is neither automatic timer shooting nor interval shooting, the SELEMODE is set to "O" since there is no need for display variable, and the return value "Variable absent" is enabled, then the command is returned to the sub-program SETUPVARIABLES.

  In the VARIABLE SETUP subroutine, if the return value of the variable selection process is "Variable present", the information displayed in the LCD display is stored in steps P 52 and P 53 and all indications are cut immediately, then the VARIABLES DISPLAY sub-program in Figure 36 is executed. The VARIABLE DISPLAY sub-program is a program for displaying the selected variable information by referring to the SELEMODE variable that has been determined in the VARIABLE SELECTION sub-program. When the VARIABLE DISPLAY sub-program starts, the display of the exposure / acquisition system is set to STOP, the number of shots for self-timer shooting is displayed if SELEMODE = 1, and the self-timer

  photographer to indicate the number of views.

  If SELEMODE = 2 the start time of the interval is displayed and the sign INT which indicates the mode with interval, the sign "S" indicating the start time and the sign "ball are lit In this camera it is It is possible to set the interval time by a relative time In conventional cameras, it has been arranged that the starting time of the interval shooting can be fixed by an absolute time. a time table that is different from the table used in setting the interval time is required, and further, conventional cameras must have a clock function A camera according to the present invention can use the same time table at a time for setting up the start interval time and setting up the interval time Therefore the camera incorporating the present invention does not need to have

any clock function.

  In the case of SELEMODE = 3, the interval time is displayed, and the signs "INT" and "4-v" indicating the duration of

the interval are on.

  When the VARIABLE DISPLAY sub-program is completed, the selected variable information is incremented in steps P 55 to P 512 when the TELE zoom telephoto switch is ON if both the TELE zoom telephoto switch and the WIDE zoom angle are set to ON in the previous setup process, and the variable information is decremented when the wide-angle WIDE zoom switch is set to ON If both the TELE zoom telephoto switch and the wide-angle switch of the WIDE zoom is set to OFF, the mark? MDSMOF is set to "1" On the contrary, if one of the contactors is turned ON, the sub-program VARIABLE DISPLAY is executed after the setting

  place, and the mark? MDSMOF is set to "O".

  The processing of steps P 514 to P 518 is executed regardless of the presence or absence of the variable information. If the MDSMOF mark is set to "O", that is, in the case where either the TELE zoom telephoto zoom switch or the WIDE zoom wide angle switch is set to ON in the setup previous, or in the case where the variable information is changed, it is tested that the variable information is being set up without restoring the display, the processing is returned to the point where the subroutine had been called in MAIN processing If the SLSW selector switch is ON even though the MDSMOF mark is at "1", the command is still returned to the

MAIN treatment.

  Since the mark? MDSMOF is "1", when the processing arrives at step P 514 with the variable information being absent, the mark "SELECT" is set to "O" if the selection contactor SLSW is OFF, and the command is returned to MAIN processing If the TELE zoom telephoto switch and the WIDE zoom wide angle switch are tested to be OFF even though the variable information exists, the SELECT mark is set to OFF. "O" when the SLSW selector switch is OFF, and the information stored in the memory is displayed in the LCD display 19 Then the

  command is returned to MAIN processing.

  The sub-program SETTING VARIABLES is described

in detail with an example.

  If each of the TELE zoom telephoto, the WIDE zoom wide angle switch and the SWS photometric switch is OFF, the exposure system is changed by switching when the EXPSW mode switch is switched from OFF to ON. In order to change the exposure system, it is necessary to set the EXPSW mode switch to ON after it has been set to OFF before. The exposure system is changed by switching among the three modes AUTO, WITHFLASH, and WITHOUT -FLASH when the EXPSW mode switch is

  Maneuvered ON / OFF repeatedly.

  If the DRIVSW drive switch is turned OFF, the shooting system is changed by switching. The shooting system is changed among the four modes, ie the VIEW mode. PARVUE, the auto-trigger mode, the AUTO-TW mode, the mode

INTERVAL.

  If the shooting system is changed from the VIEW-to-VIEW shooting mode to the auto-trigger mode, the VARIABLES SETUP sub-program is called when the SLSW selector switch is set to ON after DRIVSW drive switch is set to OFF, and the control remains in the process of setting up the number of shots in the auto-trigger mode By operating the TELE zoom telephoto zoom switch or the WIDE zoom wide angle switch with When the SLSW selection switch is ON, the number of shots for the auto-trigger mode can be changed. If this change is made when the TELE zoom telephoto switch and the WIDE zoom wide-angle switch are turned OFF ON, the information is changed one step even though the key is held down. If the selector switch SLSW has been switched from ON to OFF, the setup process is abandoned. When the shooting system is switched from AUTO-TW mode to INTERVAL mode, the interval start start processing starts when the SLSW selector switch is turned ON after

  the DRIVSW drive switch has been set to OFF.

  It is possible to set the interval start time when the TELE zoom telephoto switch and the WIDE zoom wide angle switch are set to ON while the SLSW selector switch is ON If the SLSW selector switch is set to OFF, the set-up process is aborted, however, if the SLSW selector switch is set to ON again the set-up mode of the interval time is done Then, it is possible to set sets the interval time by setting the TELE zoom telephoto switch and the WIDE zoom wide angle switch while the SLSW select switch is ON When the SLSW select switch is set to OFF, the setting processing is place is completed In this case, it is possible to set up repetitively the starting time of the interval and the duration

of the interval.

  Shooting in the auto-shutter or shooting mode in the INTERVAL mode is performed based on the information entered when the SWR trigger switch is set to ON after the shutter-release button is pressed.

  place above has been completed.

  The three-second timer is started if only the DRIVSW drive switch is held ON. If it is tested that the timer has elapsed, the camera is placed in the REWIND-FORCE mode. If the SWS photometry switch is is set to ON in the REWIND-FORCE mode while the DRIVSW drive switch is ON, the

rewinding of the film is performed.

  IAAF Control Program Referring to Figs. 37-A through 37-C and Figs. 38-A through 38-C, the AEAF CONTROL program for the shutter control system is described below. is set to the VIEW-BY-VIEW shooting mode, this program is executed when the photometry switch is switched from OFF to ON in the main processing. When the second or last shot is taken, after the film winding has been performed when the camera is in the auto-trigger mode or AUTO-TW mode, or after the INTERVAL CONTROL subprogram is completed when the camera is set in the INTERVAL mode, the AEAF COMMAND program is

  executed from the entry "COMMAND AEAF 3".

  In steps EF 1 to EF 3, the telemetry information is entered, and the lens lock operation (LL) is executed If an object distance is within the focus area of the camera, the green lamp is lit continuously, otherwise the green lamp is flashing to warn the photographer that the distance of the object is out of the focus range The LL operation is an operation to determine the distance whose objective needs to be shifted in order to focus the subject according to the information of

telemetry input.

  In the case where the AEAF COMMAND program is executed from the AEAF CONTROL 3 input, that is, in the case where the camera is placed in the INTERVAL mode, the automatic shutter-release mode , or the AUTO-TW mode, and o the shooting is the second or later shooting, the telemetry and LL processing are not performed Therefore, in such a case, the previous LL information is used as it is, so that the focal point remains the same as that of the first shot This to prevent slippage of the focal point when the object to be photographed moves out of the range of telemetry part center of the frame. In step EF 4, the code DX representing the ISO sensitivity of a film is entered in step EF 4, and the input DX code information is converted to a value Sv which is used for the operation of exposure according to table 3 Moreover, in step EF 4, in correspondence with the value Sv (the code information DX), a value of compensation of shutter speed (exposure) A Evsmin of a value Evs of the minimum shutter speed (exposure) and a compensation threshold exposure value A Evsfl of a threshold exposure value of the use of the Evsfl flash,

  are shown for the AUTO mode of the exposure system.

TABLE 3

DX 2 3 4 ISO Sv A Evsmin A Evsfl

1 1 1 25 3 0 0 00 0 0

1 1 O 50 4 0 0 00 0 0

1 O 1 100 5 0 0 00 0 0

1 Y O 200 6 0 0 25 0 5

0 1 1 400 7 0 0 50 1 0

0 1 0 800 8 0 0 50 1 0

0 O 1,600 9 0 0 50 1 0

0 Y O 3200 10 0 0 50 1 0

  In the electronically controlled conventional camera, the exposure threshold value of automatic flash operation is kept constant regardless of the sensitivity of a film to be used. Therefore, when a high-sensitivity film is used, the value of the threshold brightness for automatic flash operation and the lower limit of the automatic exposure (AE) interlock domain are determined at relatively lower values

than a standard value.

  In the camera incorporating the present invention, if the high-sensitivity film is used, not only the threshold brightness value of the automatic flash operation is lowered but also a drop in image quality due to blurring. is avoided If the film sensitivity is high, the exposure threshold exposure value of the Evsfl flash is increased to ensure that the threshold brightness value of the Evsfl flash is automatically lowered to half of the level used in conventional cameras, and the value of the minimum shutter speed (exposure) Evsmin is increased, whereby the minimum shutter speed is read A Evsmin and A Evsfl are the value compensation values Evsmin minimum shutter speed and the Evsfl threshold exposure value, respectively, with respect to the sensitivity of the ISO 100 film which is used as the

* standard in this embodiment.

  Tables 4 and 5 show the threshold brightness value of the flash implementation and an AE interlock area of the camera according to the present invention. Table 4 shows the wide-angle values and the table. 5 shows the values on the telephoto side (O, the brightness value Lv = the value

brightness of object Bv + 5).

TABLE 4

  Wide angle ISO O 100 ISO O 200 ISO 400 Value 9 00 8 50 8 00 threshold brightness (Lv) Value 9 00 9 50 0 00 threshold exposure (Evsfl) Lower limit 9 00 8 25 7 50 Reciprocal AE lock (Lv) Speed value 9 00 9 25 9 50 Minimum shutter speed (Evsmin) Shutter speed 1/45 1/54 1/64 (sec)

TABLE 5

  Telephoto ISO 100 ISO 200 ISO O 400 Value 10 00 10.25 9,75 threshold brightness (Lv) Value 9 50 10 00 10 50 threshold exposure (Evsfl) Lower limit 10 75 10 00 9 75 Reciprocal AE lock (Lv) Speed value 9 50 9 75 10 00 Minimum shutter speed (Evsmin) Speed 1/64 1/76 1/90 shutter speed (sec) Like the minimum shutter speed value Evsmin changes according to the sensitivity of a film if the placement above and used, it is possible to effectively prevent the effects of blur with a high-sensitivity film It should be noted that the shutter speed is calculated from the exposure speed Evs and the opening value Avs with a

  Av opening value which is 3.5.

  In the case where the camera is controlled by reference to the above table, the range of implementation of the flash can be partially covered by the AE interlock domain in the area where Evsmin <Evsfl In this case, in executing the FM control operation by setting the opening value Avs to the value smaller than that obtained in the FM operation of approximately 1 EV, a preferable photograph can be obtained without being excessively over-exposed. In the step EF 5, a compensation value has an opening value (number f) is determined, and in the step EF 6 the threshold exposure value of the implementation of the flash Evsfl and the Evsmin minimum shutter speed value for the exposure system AUTO mode, and a variation value of the AG No flash guide number relative to the wide-angle end, are obtained based on the focal length code DIV with reference to

  the value relationship shown in Table 6.

TABLE 6

  DIV to Evsmin Evsfl A G No 1 End O 0/8 9 0/8 0/8 wide angle

2 0 1/8 9 0/8 0/8

3 O 1/8 9 0/8 0/8

4 O 2/8 9 0/8 1/8

5 O 2/8 9 0/8 1/8

6 O 3/8 9 0/8 1/8

7 O 3/8 9 0/8 1/8

8 O 4/8 9 0/8 1/8

9 04/8 90/8 2/8

A 0 5/8 9 0/8 2/8

B 0 5/8 9 0/8 2/8

C O 6/8 9 0/8 2/8

D O 6/8 9 0/8 2/8

E O 7/8 9 1/8 3/8

F 07/8 9 1/8 3/8

1 0/8 9 2/8 3/8

1 il 1 0/8 9 2/8 3/8

12 1 1/8 9 3/8 3/8

13 1 1/8 9 3/8 4/8

14 1 2/8 9 4/8 4/8

  Telegram end 1 2/8 9 4/8 4/8 And the AEFM (automatic exposure and automatic flash operation) subprogram shown in FIG. 39 is called in step EF 7, based on FIG. above information and photometry information input from the auxiliary CPU in step EF 6, and AE information and FM information

are put in place.

  In the case where the calculated FM information means the implementation of the flash, it is tested in the steps EF 8 to EF 13 if the charging voltage of a flash capacitor reaches or not the level allowing the implementation of the flash If the charging voltage reaches the implementation level of the latter, the red lamp is illuminated, and the state in which this implementation of the flash is prepared is displayed If the implementation of the flash is not unprepared, the command enters a standby processing of

  the flash charge in steps EF 14 to EF 18.

  It should be noted that if the "AUTORET" mark is set and the shooting system is set to the INTERVAL mode, the flash capacitor voltage is not tested. This is because in the INTERVAL mode the load control is performed on each shot as shown in the INTERVAL CONTROL program in Figure 42 If the mark "AUTORET" is set to "1", the red lamp indicator is not lit or flashing because a photographer is considered distant from the camera The "AUTORET" mark is set to "1" when the second or next shot is taken in each of the INTERVAL mode shooting systems, auto-trigger mode, or AUTO-TW mode This is mainly used for the auto-release timer by skipping photometry contactor status and trigger switch tests to enter

  in the trigger sequence.

  If it is tested in step EF 8 that the flash should not be used, the processing of steps EF 9 to EF 13 is skipped since the charge of the flash is not necessary, and the

  processing of the next step EF 21 is started.

  In the case where the mark "AUTORET" is "1", that is to say o the shooting system is placed in the trigger-automatic mode, in the AUTO-TW mode or in the INTERVAL mode, and o the following shooting is a second or subsequent shooting in the mode, in steps EF 14 to EF 18 of the load waiting processes, a DISCONTINUED subroutine is called (in step EF 18) In all other cases, the charge control is repeated until charging is completed, by repeating the photometry switch test. When charging is complete, control is returned back to step EF 8 If the return value from the DISCONTINUED subroutine during the load is YES, or when the SWS photometry switch is set to OFF, the green lamp and the red lamp are turned off in step EF 19, and the load is stopped in step EF 20 So the command is returned in the

top of MAIN treatment.

  In steps EF 21 to EF 23, each LL, AE and FM determination information is output to the auxiliary CPU. In addition, if the second shot or a subsequent shot in one of the INTERVAL, auto-trigger, or AUTO-TW shooting modes is performed, the SWS photometer switch and contactor test SWR trip are skipped, and control jumps to step EF 43 In steps EF 25 and EF 26, if the SWR trip contactor is set to ON while the SWS photometric switch is held in the ON position, the control jumps to step EF 28 If the photometric switch SWS is set to OFF before the trigger switch SWR is turned ON, the red lamp and the green lamp are turned off in step EF 27, and the control returns to the top of the main treatment. Steps EF 28 to EF 54 in Fig. 38 show the processing performed while waiting for the SWR trigger switch to be set to OFF when the camera is set to a mode other than the VIEW-BY-VIEW mode. Shooting system is placed in the VIEW-BY-VIEW mode, the EF 55 step directly follows the step

EF 36.

  As mentioned above, since the second or later shot is taken, the control enters the AEAF program from the step EF 43, the steps EF 29 to EF 35 are executed when the first shooting is performed in the INTERVAL mode and steps EF 37 to EF 42 are performed when the first shot is taken in the

  trigger-automatic or in AUTO-TW mode.

  If the shooting system is set to the INTERVAL mode in steps EF 29 to EF 32, the interval start time is set in the INT timer, the? AUTOREL mark is set to "1", the interval sign is

  flashing to indicate the operating status.

  In addition, the indication of the remaining interval time is allowed by the mark? INTDDIS set to "O" In step EF 33, the maximum number of shots for interval shooting is placed in the In general, the maximum number of views is considered to be 36. In this embodiment, the maximum number is set to 40 to take into account the exceptional shots and after the number of shots is taken. set is reached, the shooting is stopped in the INTERVAL mode.

  waste of the battery is avoided.

  When the interval start time is set to 10 seconds, waiting for the start time is executed in the next processing. In the case where the start time is greater than 10 seconds, the command jumps out of the control. Step EF 34 to step EF 35 Then, the green lamp and the red lamp are turned off, and the control is directed to

  the program INTERVAL COMMAND in Figure 42.

  In the case where the shooting system is fixed in the auto-trigger mode, or in the AUTO-TW mode, in steps EF 37 to EF 39, the time of 10 seconds is set in the INT timer, the mark • AUTOREL is set to "1", and the auto-shutter will flash to indicate the operating status. If the shooting system is set to auto-trigger mode, a predetermined number of shots will be taken. the auto-trigger mode is set in the EXPC exposure meter. If the shooting system is set to the AUTO-TW mode, the number of two frames is placed in

the EXPC counter.

  It should be noted that in the case of the INTERVAL mode, when the duration of the interval is less than 10 seconds, the need to change the photometry information is small However, if the duration of the interval is 10 seconds or In addition, the brightness of an object can be changed and it is more preferable to execute the photometry process again. Therefore, control is first brought to the INTERVAL CONTROL program, and then the AEAF COMMAND program is executed. In steps EF 43 to EF 46, it is expected that the timer of the timer INT has elapsed, by repeating the test of the sub-routine DISCONTINUED, the lamp of the automatic delayed release being lit If the remaining time of the timer INT becomes less than 3 seconds, the self-timer lamp is flashing to indicate that shooting is being performed If the return value of the DISCONTINUITY sub-program becomes YES, the red lamp and the green lamp are turned off in step EF 47, and the order is

  returned to the top of the MAIN treatment.

  In steps EF 48 to EF 54, the timer INT is reset according to the selected mode of the camera In the case of the auto-trigger mode, if the number of shots for the auto-trigger mode is set to three or addition, the INT timer is set to two seconds, while if the number of views is set to

  one or two, the INT timer is set to five seconds.

  As the number of views for the AUTO-TW mode is set to

  two views, the INT timer is set to five seconds.

  In the case of the INTERVAL mode, in order to avoid a digit other than "O" being indicated when the timer of the INT timer has elapsed, the display of the remaining time is prohibited and "O" is displayed in an imposed manner.

  the interval time is set in the INT timer.

  Thus the interval between shots is changed according to the number of shots for the auto-trigger mode. It is considered that there are two goals mixed in shooting in the auto-trigger mode: first for to obtain a plurality of photographs of the same scene, then to obtain photographs of different scenes This embodiment is realized so that the interval time

  for these respective purposes is different.

  Namely, if the shooting is intended to obtain a plurality of photographs of the same scene, it is preferable to set the interval between the shots to a short value On the other hand, if the shooting is intended to obtain photographs in different compositions, it is preferable that the interval be fixed long for the modification of the scene, the arrangement, etc. Therefore, if it is determined for which of these purposes the shooting is performed, it is possible to automatically change the duration of the interval before the next shot. In general, the number of views taken at a time is relatively large if the goal is to obtain additional prints and the number of views is relatively smaller if the purpose is to change the scene In this embodiment, when the number of shots for taking view in auto-trigger mode is greater than three, it is judged that the goal is to get a plurality of the same photograph, and the interval is set to two seconds And when the number of shots for the auto-trigger mode is two, it is judged that the goal is the modification of the scene and the interval is set to

five seconds.

  The trip sequence in steps EF 55 to EF 62 is executed after the SWR trigger switch has been turned ON when the camera is set to the VIEW-BY-VIEW mode, or after the delay time has elapsed. when the shooting system is set to a mode other than VIEW-SPEAKER mode In this sequence, after the red lamp, the green lamp, and the auto-timer lamp have been turned off, the timer expires. start signal of the shutter displacement is output to the auxiliary CPU and it is confirmed that the end of shutter displacement signal is inputted from the CPU

auxiliary.

  In the case where the shooting system is placed in the VIEW-VIEW mode, the command goes to the WINDING program In other cases, the EXPC exposure counter is decremented and the command goes to the WINDING program It should be noted that if the counter EXPC is equal to "O", the command goes to the program WINDING after the sub

  program ABANDON AUTOMATIC TRIP has been called. AEFMl calculation program Figure 39 shows a AEFM sub program

who is

  called in step EF 7 of the AEAF COMMAND program.

  In this process, the exposure information that is output to the auxiliary CPU is set, it is determined whether the flash is operated or not and the aperture value Avs when the flash is set is

calculated.

  In the AMI step, the mark? BVMIN is erased and the information FM is fixed so that the flash is not

not implemented.

  In the steps AM 2 to AM 4, a photometry information (brightness value) is limited between the lower and upper limits. That is, the mark BVMIN is set to "1" when the photometry information (value Bv is smaller or equal to the lower limit value of 1.0, so that the photometry value is rounded to 1, and the value

  upper limit is limited to 12.0.

  In step AM 5, the value of the exposure Evs is calculated from the compensation value a of the number f of the opening with respect to the wide-angle end, the value Sv of the sensitivity of the film, the information from

  photometry (brightness value) Bv.

  If it is determined in steps AM 6 to AM 8 that the exposure system is set in the FLASH mode, that the exposure system is set in the AUTO mode and that the photometry information is equal to or lower than the lower limit thereof, or that the value of exposure Evs is less than the exposure threshold exposure value of flash Evsfl, the calculation of FM in steps AM 9 to AM 13 is executed In all other cases, the command comes to the AM 14 step the flash being in a state of non implementation It should be noted that the threshold exposure value Evsfl at step AM 8 is the compensated value with the compensation value above

  mentioned Evsfl which is added to it.

  The AF information defined on the basis of the telemetry information is converted into the opening value Avs corresponding to the reference guide number in the step AM 9 And in the step AM 10 the value of the opening is calculated in such a way that the variation value G No of the guide number corresponding to the flash plane change itself and the deviation (Sv 5) of the value of the sensitivity of the film relative to the value of the film sensitivity of 100 ISO. are added to Avs, and the compensation value has an opening number f corresponding to the variation of the focal length of the lens relative to the wide-angle objective end

is subtracted from it.

  In steps AM 11 to Am 13, the value of the opening Avs is limited between the lower limit of 3.5 and the upper limit of 8.0 and the opening Avs is determined

as being FM information.

  Exposure value Evs is limited between upper and lower limit in AM 14 and AM 15, and the command is returned to the program

  AEAF COMMAND with these values which are AE information.

  The minimum shutter speed value Evsmin in step AM 15 is a compensated value obtained by adding the compensation value Evsmin above

mentioned.

  lSub program DISCONTINUED and under program AUTOMATICALLY DISCONNECTEDl Figure 40 is a flowchart showing the DISCONTINUED subroutine This subprogram is a subprogram for interrupting automatic shooting in the automatic trigger shooting mode, AUTO-TW mode and INTERVAL mode, and it is called in a loop processing In automatic shooting, the shooting operation can be performed automatically without any instructions from a photographer after

  that the command is entered in the respective sequences.

  Therefore, if shooting is interrupted while the operation sequence is being performed, the processing

  sequence interruption is necessary.

  In the case where the load is not completed in steps DCI to DC 4, the return value is set to YES when either the BACK back cover switch or the SWP power contactor is turned ON, while the return value is set to NO when both the rear cover switch BACK and the power switch SWP are set to OFF In case the charging is completed, the return value is set to ON when the SWP power switch is ON when the BACK back cover switch is ON or OFF, and the return value is set to NO when the BACK back cover switch is ON and the power switch is ON SWP is on

STOP.

  In the case where the return value is set to YES, in the DISCONTINUED subroutine or in the AUTOMATIC RELEASE subprogram, in steps DC 5 to DC 10, the automatic trip state is aborted and the automatic trip lamp In addition, the sign of the automatic delayed release displayed in the LCD display 19 is changed from the flashing state indicating a state of "operation in progress" to the continuously lit state showing a state " ready for operation "when the shooting system is placed in the auto-trigger mode or in the AUTO-TW mode When the camera is set to the INTERVAL mode, the interval indication is changed from the shutter mode. flashing state in steady state and the display of the time indication is replaced by the indication of the focal length. lWINDING PROGRAM Figure 41 shows the WINDING program that is called from the AEAF CONTROL program after a shot has been taken This program is executed to wind the film of an image after a photograph

has been executed.

  In step WD 1, it is tested if the film is loaded into the camera, referring to the state of the mark? FLEXZ If a film has been loaded, the WPC winding pulse counter is placed at "4" and the above-mentioned WINDING PULSES COUNT subprogram is called in step WD 2 If the WINDING PULLS COUNT sub-program is successfully completed, the film counter is incremented (in step WD 4 ), the number of views is displayed in the LCD display 19 If the return value of the PULSE PULP COUNT sub-program is "INTERRUPT", the command returns to the top of the MAIN process if the rear cover is opened in step WD 6 If the rear cover is closed, the ABANDON AUTOMATIC RELEASE subprogram, which is shown in Figure 40, is called in step WD 7, the

  command is sent to the REWINDING subprogram.

  In the case where the steps WD 2 to WD 5 are skipped because the film does not exist or if the WINDING PULSES COUNT sub-program has been successfully completed, the command returns to the MAIN processing when the take system is set in the VIEW-BY-VIEW shooting mode, the command is directed to the AEAF CONTROL program when the camera is fixed in the auto-trigger shooting mode, or the command is directed to the AEAF CONTROL program after moving the lens to the wide-angle end by calling the WIDE ANGLE 2 sub-program when the camera is fixed in the shooting mode AUTO-TW Si the shooting system is set to the INTERVAL shooting mode, the control is directed to a program

  INTERVAL CONTROL which is described below.

  Figure 42 shows a flow chart showing the program INTERVAL COMMAND which is called from the program WINDING In this program a standby process is run, which measures the duration of the interval set up for the second shooting or later shooting when the shooting system is set to INTERVAL mode If the shooting system is set to a mode other than the INTERVAL mode, the control loops in the MAIN processing. In the case of the INTERVAL mode, the control loop between the AEAF CONTROL program and the INTERVAL CONTROL program, without going through

MAIN treatment.

  When this process is started, "five seconds" is set in the INT timer if the remaining interval time, that is, the time period until the next shot is less than five seconds. when the shooting system is set to SANSFLASH mode, and "eleven seconds" is set in the INT timer if the remaining interval time is less than eleven seconds when the shooting system is set to a other than the FLASH mode This is the minimum waiting time required in the camera's shooting system and the processing is used to reset the timer in the INT timer, if necessary, before entering the camera. loop described below It should be noted that, since there is a possibility that the flash is implemented if the camera is set in a mode other than the FLASH OFF mode, the additional time to load the flash

flash capacitor is included.

  In the step IN 6, the display of the remaining time for the duration of the interval in the INTERRUPT subprogram is allowed, and the DISCONTINUED subroutine is called consecutively in the steps IN 7 to IN 10 until the remaining interval time becomes less than five seconds or eleven seconds depending on the mode selected for the shooting system If the return value of the DISCONTINUITY subprogram is YES, that is, when is tested that the treatment must be interrupted, the command is directed from the

  loop up MAIN treatment.

  The loop of steps IN 11 to IN 17 is the processing for the repetitive call of the DISCONTINUED subroutine until the remaining gap time becomes smaller than three seconds. In this loop, if the exposure system and set in a mode other than the SANS-FLASH mode, the flash charge control is performed repeatedly If the remaining gap time becomes shorter than five seconds, flash charging is prohibited. is set to a mode other than the SANS-FLASH mode, the charge control is executed for six seconds. The charge control of the flash in step IN 14 is a process for starting the charge unless the charge voltage of the flash capacitor reaches a predetermined level.

  predetermined level, no treatment is performed.

  If the remaining gap time becomes shorter than three seconds, the control is directed to the

  AEAF COMMAND program by input "AEAF COMMAND 3".

  In this case, if the return value of the DISCONTINUITY subroutine is YES, the command returns to the top of the

MAIN treatment.

  FIG. 43 is a flowchart showing the REWINDING program, which is called from the WINDING program or from MA step MAIN processing. This program is executed when the film is wound to the end or when the forced rewinding is controlled by a predetermined operation, which is the process for rewinding a film in a cartridge of

movie.

  In steps RW 1 to RW 3, the objective is returned to its retracted position, the winding motor is rotated in reverse and the winding pulse counter WPC is set to "4" which corresponds to the value

feeding an image of the film.

  In step RW 4, a mark? 2START which indicates the start of the two-second timer is cleared, and the process enters a loop of steps RW 6 to RW 20 after starting the timer of 3.5 seconds at

step RW 5.

  In this loop, the BACK back cover switch input and the WP winding pulse are repeatedly executed. In addition, the film counter is decremented and the film number is cleared from the display every four detections. the occurrence of a winding pulse WP If no change is detected in the winding pulse within a predetermined period of time or if the rear cover is open, the control leaves the loop Well that the predetermined time period mentioned above (control time) is set at two seconds, the winding motor is rotated for 3.5 seconds from the moment the winding motor starts to be rotated in operation regardless of the state of the BACK back cover contactor or WP winding pulse. This is because the motor is rotated for a longer period of time since the pulse WP winding may not be emitted if the film is relaxed at the beginning of the rotation.

  reverse winding motor.

  Step RW 9 follows step RW 6 until the timer timeout of 3.5 seconds has elapsed, and then the contactor state information is entered and used for the test in Step RW 10 and RW 11 Suppose the back cover is closed Then a loop of steps RW 12, RW 6 and steps RW 9 to RW 12 is formed until the change is detected in the winding pulse WP in step RW 11 Steps RW 7 and RW 8 are executed after the timer delay of 3.5 seconds has elapsed The timer of two seconds is started, the mark? 2START is set to "1", and a loop of steps RW 9 to RW 13

consists.

  If a change occurs in the winding pulse, the command goes from step RW 11 to step RW 14, and is tested if the pulse is changed from OFF to ON.

or from ON to STOP.

  In addition, if it is detected that the winding pulse WP is changed from OFF to ON, the winding pulse counter WPC is decremented in step RW 15 and is tested whether the pulse counter of WPC winding is equal or not equal to "0" If the winding pulse counter is tested to be equal to "O", it is determined that the film is rewound. Then in steps RW 16 to RW 18, the film counter is decremented, the number of views is displayed, and

  the film counter is reset.

  The step RW 19 is executed as long as the modification occurs in the winding pulse which can reduce the influences of the erroneous inputs due to the bounce, etc., by prohibiting by the inhibition of the signals to be input, in the field in which signals are not theoretically modified, as described in the treatment of the program COUNTER PULSES

WINDING.

  Before the two-second timer starts, the command is returned from step RW to step RW. After the timer has been started, the command is returned to step RW 7 in which the

  timer of two seconds is restarted.

  If the rear cover is open in the above loop and the timer delay of 3.5 seconds has elapsed, the winding motor brake is applied after the winding system has been initialized in steps RW 21 to RW 23 and the order goes to

step RW 29.

  If there is no change in the WP winding pulse until the timer of two seconds has elapsed, it is tested that there is no film in the camera or that a movie is totally rewound, and the processing of the stage

next RW 24 begins.

  In steps RW 24 to RW 28, after the winding motor brake has been applied, a? REWEND mark indicating end of rewind is set to "1" if the film exists in the camera, then, the counter is set to "0", and the number of shots is displayed If there is no movie in the camera, steps RW 26 to RW 28

  are skipped and the command goes to step RW 29.

  In steps RW 29 to RW 31, the drive system engaged with a spindle axis is released by the forward rotation of the winding motor, which has just stopped, for 0.5 seconds, releasing the axis of the coil for

the next load.

  As the REWIND program is finished, the command

returns to the LOCK program.

  According to the film detection device embodying the present invention, as shown in the figure, after the winding motor has begun to rotate, when the winding pulse switch WP is changed from "O" to "1" , the pulse counting process is started When WP is detected to be changed from "O" to "1", the "WPCST" mark indicating the start of the winding is set to "1", and in a step WP 11 of the figure, the detection (input) of the state of the pulse contactor is interrupted for 10 ms. Thereafter, when the processing is looping, the command goes from step WP 8

at WP 13.

  If the state of the winding pulse switch WP is unchanged, the detection carried out is retained. If it is changed from "1" to "0", the WPC counter which corresponds to the length of the advance of the film is decremented. and then the state is entered When WPC is equal to "O", it is determined that the film has advanced a length

  predetermined, and the subroutine is stopped.

  From the foregoing, according to the present invention, since the detection of the signal is prohibited during the period in which the winding pulse signal can not theoretically be modified, a bad count of the number of pulses due to an input error of the winding pulse signal is reduced Therefore, the reliability of the length of the detected film advance

is improved.

Claims (6)

  A film feed detecting device for detecting the length of the advance of a film characterized in that it comprises: signal producing means for producing a pulse signal in response to the advance of a film, said pulse signal consisting of a first (OFF) and a second (ON) state thereof; detection means for detecting the state of said signal; discrimination means for discriminating whether the state of said signal is changed or not; and inhibiting means for inhibiting said detection means in detecting a change in the state of said signal for a predetermined period of time after   that said change has been detected.   2 film feed detecting device according to claim 1, characterized in that said detecting means identify the state of said signal when the same state of said signal is detected during a   predetermined detection time.   A film feed detecting device according to claim 2, characterized in that said discriminating means detect the change in the state of said signal only when said signal is   modified from said first state to said second state.   A film feed detection device according to claim 3, characterized in that said discriminating means repeatedly detect whether the state of said signal is changed within a second predetermined period of time until that the modification state is detected.   A film feed detecting device according to claim 4, characterized in that the feed detection of the film is terminated if the change in the state of said signal is not detected at   during a third predetermined period of time.   A film feed detecting device according to claim 1, characterized in that said signal generating means comprises: a first fixedly disposed contact member; a second contact member movably disposed, said second contact member being brought into contact with said first contact member, and spaced therefrom in a neutral position; and an implementation member that is driven in response to feeding said film to reciprocate said second contact member for contact and departure said first contact element, whereby said second contact element comes into contact with said first contact element in a back-and-forth motion in response to feeding of the film.  A film feed detecting device according to claim 6, characterized in that it further comprises a rotatable shaft member, said rotatable shaft member being rotated in response to feeding of the film, and protruding members disposed along the peripheral surface of said shaft member, said second contact member being reciprocally engaged to engage and depart from said first contact member when said shaft rotates.