JPH0651382A - Camera capable of executing consecutive photographing - Google Patents

Abstract

PURPOSE:To increase the speed of consecutive photographing by executing release even when a film is not perfectly stopped. CONSTITUTION:A consecutive photographing control means 4 which decides the shutter speed of a shutter means 5 based on the photometry value of a photometry means 6 and controls the shutter means 5 and a film driving means 2 so as to consecutively photograph the film moved by the driving means 2 when a prescribed relation is satisfied by the decided shutter speed and the speed of the film detected by the speed detection means 1 of the film 3 with respect to the allowable blurring quantity of an image surface is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of continuously repeating film winding and shutter release.

[0002]

2. Description of the Related Art In a conventional camera capable of continuously photographing while pressing a release button, a film is wound up after a first release as shown in FIG. The operation of releasing and then starting winding again was repeated.

[0003]

In the above-mentioned conventional camera, since the film is completely stopped each time the film is wound up, the time which can be driven at the full speed from the start to the end of the film winding is limited, and the film winding motor is started up. Because of the brakes and brakes, the continuous shooting speed was reduced.

Further, in order to increase the continuous shooting speed, it is necessary to start and stop the film as quickly as possible to increase the full speed time, but a strong motor and a sturdy motor that can withstand the mechanical load accompanying this Since a stop mechanism is required, there is a drawback that the weight and cost increase.

The camera capable of continuous shooting according to the present invention has been made in view of such a problem, and if the moving speed of the film and the shutter speed have a specific relationship, the release is possible even if the film is not completely stopped. It is to provide a camera capable of continuous shooting by increasing the continuous shooting speed.

[0006]

In order to achieve the above object, a camera capable of continuous shooting according to the present invention has a film speed detecting means for detecting a film moving speed during film winding and a winding film driving means for winding a film. A measuring means for measuring the brightness of the subject, a shutter means for opening and closing the shutter, and a shutter speed of the shutter means based on the photometric value of the measuring means, and the shutter speed thus determined and the film. When the film speed detected by the speed detecting means satisfies a predetermined relationship with the allowable blur amount of the image plane,
A continuous shooting control means is provided for controlling the shutter means and the film driving means so that the film moving means can continuously shoot the moving film.

[0007]

That is, in the continuous shooting camera of the present invention, when the shutter speed and the film speed satisfy a predetermined relationship with the allowable blur amount of the image plane, the moving film is continuously shot. The shutter means and the film driving means are controlled so that they can be performed.

[0008]

First, an outline of an embodiment of the present invention will be described with reference to FIG.

In the present embodiment, when the film 3 moves while the shutter 5 is open, an image is blurred on the surface of the film 3, and the amount of blur is visually permissible to human eyes. If the blur amount is less than or equal to the blur amount, it is used that there is no practical problem. That is, if the moving distance of the film 3 in the opening of the shutter 5 is equal to or less than the permissible blur amount of the image plane at the time of shooting, there is no problem in practical use. When SS: shutter speed (shutter opening time) (sec), δmax: allowable blur amount (mm), it is not necessary to completely stop the film 3 if v · SS ≦ δmax (1) is satisfied.

The film moving speed v is detected by the film speed and position detecting means 1, and the detection result is output to the CPU 4. As a method of detecting the film moving speed v, a method of detecting the performance with a photoreflector is generally used. However, the interval of performance is coarse for obtaining an accurate film moving speed v. Therefore, in this embodiment, the clock signal reproduced from the magnetic track of the film 3 is used. By using this clock signal, the film 3 can be driven at a moving speed corresponding to the shutter speed.

Further, the CPU 4 determines the shutter speed SS, that is, the shutter speed, based on the subject brightness measured by the photometric means 6. Then, when the film moving speed v and the shutter speed SS satisfy the formula (1),
The CPU 4 controls the winding motor 2 and the shutter 5 to open the shutter 5 for the shutter time SS when the film 3 reaches a predetermined position.

FIG. 2 is a block diagram showing the above embodiment in more detail. In the figure, a microcomputer (hereinafter abbreviated as μCOM) 11 performs sequence control of the entire system and various calculations. The μCOM 11 has a display circuit 12, a release switch 13, and an operation switch 1 as will be described later.
4, coupled to film sensitivity reading circuit 15 and storage circuit 16. Further, the μCOM 11 includes a zoom encoder 18, a photometric processing circuit 19, and a mirror control unit 2.
0, magnetic information control circuit 17, film control unit 21, shutter control unit 22, focus detection circuit 23, pulse generation circuit 2
4, the motor control circuit 25 and the diaphragm control circuit 26 are connected.

The display circuit 12 displays various operation modes and displays data calculated by the μCOM 11. Further, the release switch 13 is composed of a two-stage stroke switch, and the μCOM 11 executes the distance and photometric operation with the switch signal of the first step, and the exposure operation with the switch signal of the second step. ing.

The operation switch 14 is used for setting the operation mode of the camera, the exposure condition, and the like. The film sensitivity reading circuit 15 reads the DX code of the film 30 and sends the Sv signal to the μCOM 11. Further, the recording unit 16 is a non-volatile memory for storing data such as the number of frames of the film 30 and the operation mode of the camera which need to be stored even when the power is turned off. The magnetic information control circuit 17 is a circuit for reproducing data from a magnetic track provided on the film 30 and recording data on the magnetic track.

The photometric processing circuit 19 detects the subject brightness from the photocurrent of a light receiving element such as the SPD (two-divided light receiving element) 28 and sends a Bv signal to the μCOM 11. Further, the mirror controller 20 is for controlling the up-down operation of the quick return mirror 29.

Further, the film controller 21 controls the film 3
It is used to control the automatic winding of 0, automatic rewinding, etc. The shutter control circuit 22 controls the shutter 31 based on the signal from the μCOM 11. The shutter 31 is an electro-optical shutter that controls transmission / blocking of light using an electro-optical effect. The shutter 31 has a structure in which transparent electrodes are arranged on both sides of a thin plate of solid solution ceramics such as PLZT and sandwiched by polarizing plates. Then, light transmission / blocking is performed in two states, that is, a state in which an electric field parallel to the solid solution ceramics thin plate is applied by the electrode and a state in which it is not applied. The reason why the mechanical shutter device is not used is that it is not sufficiently responsive to expose the film 30 while moving it. Further, the focus detection circuit 23 is adapted to send the data necessary for detecting the amount of defocus to the μCOM 11.

The pulse generation circuit 24 calculates the amount of movement of the focus lens 32 required for focusing on the basis of the above data, and outputs a pulse proportional to the rotation of the motor corresponding to this amount of movement. The above μCOM11
Controls the first motor 33 via the motor control circuit 25 while detecting the output of the pulse generation circuit 24. When the operator operates a PF (power focus) operation switch, which is one of the operation switches 14, the μCOM 11 controls the first motor 33 based on this operation signal. As a result, the focus lens 32 is driven. Further, when the user operates a PZ (power zoom) operation switch, which is one of the operation switches 14, the μCOM 11 controls the second motor 34 via the motor control circuit 25 based on this operation signal. As a result, the variator lens 35 moves in the optical axis direction, and the focal length of the taking lens changes. Then μCO
The zoom encoder 18 detects the focal length of M11. The diaphragm control circuit 26 has a μC
The diaphragm 36 is controlled based on the Av value calculated by the OM 11.

FIG. 3 is a perspective view of the film control section 21 seen through from the rear. This figure shows a state immediately after the film cartridge is loaded in the camera body. FIG. 4 is a perspective view showing a film cartridge.

Film winding provided inside the camera body
A pinion gear 53 is provided on the output shaft of the rewinding motor 51, and the pinion gear 53 meshes with the sun gear 54. Further, the sun gear 54 is a planetary gear 55.
The planet gear 55 is supported by a gear arm 56 so as to revolve around the rotation axis of the sun gear 54.

Further, in the film winding chamber provided on the right side from the rear of the camera, a winding spool 57 for winding the film 30 is rotatably provided. A spool gear 57a is integrally provided on the end surface of the spool gear 57a. The spool gear 57a meshes with the planet gear 55 which is revolved counterclockwise. Take-up spool 57
From the lower outer peripheral surface of the perforation engaging claw 57 that engages with perforation of the film 30 described later.
b is protruding.

An idle gear 67 is provided at a position where the planet gear 55 meshes with the planet gear 55 when the planet gear 55 revolves in the clockwise direction.
A coupler gear 6 to be described later via 7, 66, 65 and 62.
Connected to 3.

To the right of the rear of the camera body,
A cartridge storage chamber for storing a film cartridge shown by a chain double-dashed line in FIG. 3 is provided. A coupler 6 having a tip protruding in a "-" shape is formed above the storage chamber.
A coupler gear 63 having 4 is rotatably provided. As shown in FIG. 4, the coupler 64 engages with a groove provided on the upper end surface of the feeding spool 71 provided on the film cartridge 70, and is integrated with the feeding spool 71 around the axis. The magnetic head 50 is formed by integrating two magnetic heads 1 and 2 which will be described later.

FIG. 5 shows the magnetic information control circuit 17 and the film control section 21. The D / A converter 101 is
Used for setting the film moving speed. μCOM
The speed signal output from 11 is converted into an analog signal and output to one input terminal of the differential amplifier 103. Film 3
The moving speed of 0 is detected from the clock signal reproduced from the magnetic track on the film 30. When the magnetized magnetic body moves in front of the magnetic head 1 (105), the magnetic flux passing through the magnetic head 1 (105) changes, and a signal corresponding to the data recorded in the magnetic body is transmitted to the magnetic head 1 (105). Occurs. The output signal of the magnetic head 1 (105) is amplified by the head amplifier 109, and then the waveform shaping circuit 11
It is converted into a clock signal by 1. This clock signal is output to the μCOM 11 and the f / v converter 113.

The μCOM 11 can detect the amount of movement of the film 30 by counting this clock signal.
The recording data, which is also used as a synchronizing signal when recording data on the magnetic track, is output from the DATA terminal. This signal is input to the buffer 115. The buffer 115 receives the signal from the magnetic head 2 (1
07). Then, the magnetic head 2 (107) magnetizes the magnetic body according to the recording data.

On the other hand, the frequency of the clock signal is proportional to the moving speed of the film 30. Therefore, the clock signal is converted into an analog signal by the f / v converter 113 and output to the differential amplifier 103. The differential amplifier 103 is D /
The difference between the output of the A converter 101 and the output of the f / v converter 113, that is, the error signal of the film moving speed is output to the comparator 115. The comparator 115 compares the error signal from the differential amplifier 103 with the output of the triangular wave oscillator 117 as a determination level to generate a PWM (pulse width modulation) signal. And the transistor T is generated by the PWM signal
ON / OFF control of r0. The electric power supplied from the battery through the transistor Tr0 is supplied to the transistor bridge composed of Tr1 to Tr4 through the smoothing circuit composed of the diode D, the choke coil L and the capacitor C. The output voltage of the smoothing circuit is Tr0
Is proportional to the ON / OFF ratio of. The transistor bridge is for driving the film winding and rewinding motor 119.

The motor drive signal from the μCOM 11 is decoded by the decoder 121 into four signals (OFF, brake, CW).
Rotation, CCW rotation) and output to the transistor bridge. Due to the operation of the circuit described above, μCOM
11 can drive the film winding / rewinding motor 119 at a set speed. That is, the film 30 can be driven at a set speed.

The main routine will be described below with reference to the flowchart of FIG. ΜCO for S100
An initial decision is made after M11 is powered on and reset. In S102, the aperture control circuit 26 is operated to stop the aperture OPE.
Send N command. When the power is off, the diaphragm 36 is completely closed. Therefore, light cannot pass through the lens. The reason why the diaphragm 36 is used as a light blocking member is that there is a problem in the light blocking property of the shutter 31. In this embodiment, an electro-optical shutter is used in order to emphasize the response of the shutter operation. It is known that the shutter 31 has a poor light-shielding property as compared with the mechanical shutter. Therefore, the film 30 may be exposed if the shutter 31 alone shields the light for a long time. The quick return mirror 29 located in front of the shutter 31 also functions as a light blocking member,
For more completeness, the diaphragm 36 is also used as a light blocking member when the power of the camera is OFF.

In S104, the operation mode of the camera is determined based on the state of the operation switch 14. In S106, the Av value and the Tv value are calculated from the Sv value from the film sensitivity reading circuit 15 and the Bv value from the photometric processing circuit 19. The diaphragm 36 and the shutter 31 are controlled based on the Av value and Tv. In S108, the defocus amount is calculated based on the data from the focus detection circuit 23. Further, this defocus amount is converted into a lens driving amount. In S110, the operation mode of the camera, the calculated aperture value, and the shutter speed are displayed by the display circuit 12. In S112, the PZ which is one of the operation switches 14
The state of the operation switch is determined.

The PZ operation switch is a switch operated by the operator when the zooming is performed electrically. The PZ operation switch is the focus lens 3
There is a switch for zooming 2 to the telephoto side and two types for zooming to the wide angle side. In S112 above,
If either of the PZ operation switches is on, S1
Move to 14.

In step S114, the second motor 34 is turned on through the motor control circuit 25 while the motor drive speed is being detected by the output of the pulse generation circuit 24. When the switch operation by the operator driving the PZ operation switch in any direction is completed, the power zoom operation is completed and the process proceeds to S104.

On the other hand, in S112, when the PZ operation switch is not operated by any, the process proceeds to S116, and it is determined whether or not the MF mode is set. If the MF mode is selected in S116, the process proceeds to S118. On the other hand, in the MF mode, the operator needs to focus on his own.

At S118, the state of the PF operation switch is read. There are two types of PF operation switches, a switch for moving the focus lens 32 to the infinity side and a switch for moving the focus lens 32 to the closest side. If either of the two is turned on, the process proceeds to S120, and the output of the pulse generation circuit 24 detects the mode drive speed. At the same time, the focus lens 32 is driven via the motor control circuit 25 in the direction of the switch in which the first motor 33 is turned on. When it is not in the MF mode in S116, the process proceeds to S122. In S122, the state of the rewind switch is determined. When the switch is ON, the process proceeds to S124 and the subroutine "rewind" is executed. The operation of this subroutine is to rewind the film 30 that has been photographed back to the cartridge 70. This subroutine will be described later. When the rewind switch is OFF, the process proceeds to S126 to determine the state of the BK switch.

The BK switch is for detecting the opening / closing of the rear cover of the camera. When the switch is turned on, S128
Then, the operation moves to and the "idle feed" operation is executed. This behavior is
This is to wind the loaded film 30 on a take-up spool by a predetermined amount. When the BK switch is OFF, S1
The process proceeds to step 30 and the state of the power switch is determined. When the switch is off, the process proceeds to S132. Then, after closing the diaphragm completely to shield the camera from light, μCOM11
Operation stops. When the power switch is ON, the process proceeds to S134. In S134, the state of the 1R switch, which is the first stage of the release switch, is determined. 1R
When the switch is off, the process proceeds to S104.
When the switch is ON, in S136, MF
Determine if it is in mode. Since the AF operation is not necessary in the MF mode, the process proceeds to S142. If not in the MF mode, the flow shifts to S138, and it is determined whether or not focus is achieved based on the defocus amount calculated in S108. If out of focus, the process moves to S140. In S140, the focus lens is controlled based on the lens driving amount calculated in S108. After driving the lens, to check the focus condition,
It is necessary to measure the distance again. Therefore, when S140 ends, the process moves to the beginning of the main routine. When it is determined that the subject is in focus in S138, the process proceeds to S142. In S142,
The state of the 2R switch, which is the second stage of the release switch, is determined. When the switch is off, the process proceeds to S104. When it is ON, the process proceeds to S144 and the subroutine "exposure" is executed.

The subroutine "exposure" will be described with reference to the flow charts of FIGS. Prior to the explanation of the flowchart, the relationship between the shutter speed SS and the film speed v is calculated by the equation (1). When the allowable blur amount δmax is 0.03 [mm], the relationship between SS and v is as shown in FIG. 7. In this embodiment, the shutter speed is 1 / 8000,1
Exposure is allowed during movement of film 30 at / 4000, 1/2000. When the speed is 1/1000 or less, the film speed becomes 30 [mm / S] or less, and it is difficult to control the movement of the film 30 at such a low speed. Further, in such a state, there is almost no difference from the conventional exposure sequence (a sequence in which the shutter opening operation and the film winding operation are separated). For the above reason, shutter control during film movement is permitted only in 1/8000, 1/4000, and 1/2000.

In S200, the aperture value already calculated is output to the aperture control circuit 26. The diaphragm control circuit 26 drives the diaphragm based on this data. In S202,
UP the quick return mirror 29 to the mirror control unit 20
The command to make it output is output. In S204, the shutter time value already calculated is output to the shutter control circuit 22. The shutter control circuit 22 applies a voltage to the shutter 31 based on this data. While the voltage is applied, light is transmitted and the film 30 is exposed. S2
At 06, since the exposure is completed, the film counter is incremented.

In step S208, the film counter value and the photographing data are stored in the storage circuit 16. In S210, it is determined whether or not the continuous shooting mode is set. When not in the continuous shooting mode, a sequence in which the operation and the film winding operation are separated between the shutters is executed. The continuous shooting mode is set by one of the operation switches 14. The case where the continuous shooting mode is not set will be described. In S212, the counter inside the μCOM 11 is cleared. Then, in S214, the counting operation is permitted. This counter is for counting clock signals input from CLK. The clock signal is a signal reproduced from the magnetic track of the film 30. The amount of movement of the film 30 can be detected by counting this signal. Here, it is assumed that the clock signal of 600 is the amount of the film 30 necessary for one frame shooting.

In step S216, v ₁ is set as the moving speed of the film 30 in the D / A converter 101.
It is assumed that v ₁ = 240 [mm / sec]. S218
Then, a signal is output to the decoder 121 for winding the film and rotating the rewinding motor 119 clockwise. Then, the winding of the film 30 starts. In S220, a command to DOWN the quick return mirror 29 is output to the mirror control unit 20. In S221, a command for returning the diaphragm 36 to the open state is issued.
Output to. In S222, the process waits until the counter reaches 400. When the process proceeds to S224, v ₂ is set as the moving speed of the film 30 in the D / A converter 101. It is assumed that v ₂ = 120 [mm / sec].

Then, in S226, the process waits until the counter reaches 500. When the process proceeds to S228, the moving speed of the film 30 to the D / A converter 101 is v ₃
Set. It is assumed that v ₃ = 60 [mm / sec]. 590 less 10 counts than the winding amount for one frame
It waits in S230 until the counter reaches. When the counter reaches 590, in S232, the D / A converter 1
Set film moving speed 0 to 01. Then S2
At 34, the motor 119 is braked.

After waiting for 50 seconds in S236, the motor 119 is turned off in S238. S224
The movement speed of the film 30 is gradually reduced by the processing of to S238, and the movement of the film 30 is stopped at the target value. In S240, it is determined from the value of the film counter whether all the films 30 have been shot. When all the films 30 have been photographed, the process proceeds to the subroutine "rewind". When the film 30 remains, the process returns to the main routine. In the continuous shooting mode, the process proceeds from S210 to S250. In S250, it is determined whether the calculated shutter speed is longer than 1/1000. 1/1
When it is longer than 000, the operation of opening the shutter 31 during the film movement is not executed. Therefore, the process proceeds to S212. When the shutter speed is shorter than 1/2000, S2
Move to 52. The operations of S252 to S258 are the same as the operations of S212 to S218 described above. S2
At 60, it is judged from the value of the film counter whether photographing is possible. When the film 30 does not remain, the continuous shooting mode operation cannot be executed. Therefore, the process proceeds to S220. When the film 30 remains, the process proceeds to S262 and the state of the 2R switch is determined. When the switch is off, the operation must end. Therefore, the process proceeds to S220. When the switch is ON,
The process moves to S264. And the shutter speed is 1/800
It is determined whether it is 0. When it is 1/8000, no problem occurs even if the film 30 is exposed while the film moving speed is 240 [mm / sec]. Therefore, S27
The process proceeds to step 6 and waits until the winding of the film 30 which has been exposed is completed. When winding is completed, the counter is initialized in S278 and S280 in preparation for the next winding operation. In S282, the shutter speed is output to the shutter control circuit 22. Therefore, the film 30 is exposed during the film movement. If the shutter speed is 1/4000 or 1/2000, the process proceeds from S264 to S266. Since the film speed is reduced when the counter reaches 400, the film speed v ₂ is set in the D / A converter 101 in S268. v ₂ = 120 [mm / s
ec]. When the shutter speed is 1/4000, there is no problem even if the film 30 is exposed at the film speed v ₂ . Therefore, the process proceeds from S270 to S276. When the shutter speed is 1/2000, the process proceeds from S270 to S272. Then, it waits until the counter reaches 500. When the process proceeds to S274, the film speed v ₃ is set in the D / A converter 101. v ₃ = 60
[Mm / sec]. At this speed, there is no problem even if the exposure is performed at a shutter speed of 1/2000. S2
When the exposure of the film 30 at 82 is completed, S28
At 4, the film counter is incremented. S28
At 6, the film counter value and the shooting data are stored in the storage circuit 16. Then, in order to increase the winding speed of the film 30, in step S290, v ₁ is set as the film moving speed in the D / A converter 101. Then, the process proceeds to S260 to determine whether to continue the operation.

The operation of the continuous shooting mode will be described with reference to FIGS. The vertical axis of the figure shows the film moving speed, and the horizontal axis of the figure shows time. Here, it is assumed that the shooting operation is executed continuously for two frames. (A) shows the case where the continuous shooting mode is not set or the shutter speed is 1/100 in the continuous shooting mode
The operation when the time is longer than 0 is shown. v ₁ , v ₂ , and v ₃ are moving speeds of the film 30 described in the flowchart. The section SS1 indicates the exposure time of the film 30 for the first time. The section T ₀ is an acceleration section until the moving speed of the film 30 reaches v ₁ set in the D / A converter 101. Then, in the T ₁ section, the film 30 moves at the speed v ₁ . The section T ₂ shows the first deceleration operation.
The moving speed of the film 30 changes from v ₁ to v ₂ .
The section T ₃ shows the second deceleration operation. The moving speed of the film 30 changes from v ₂ to v ₃ . In the section T ₄ , the motor 119 is braked and the movement of the film 30 is stopped. Operation of the subroutine "exposure" is equivalent to the interval of up SS1~T _4. T ₅ is the operation of the main routine. Then, the second exposure operation starts from SS2. EXP1 with hatching indicates the film movement due to the first exposure operation. EXP2 without hatch is
This is the second film transfer.

The operations in the continuous shooting mode will be described below with reference to (b), (c) and (d). (B) shows shutter speed is 1 /
It is an exposure operation at the time of 8000. First film 30
When the exposure to the film is finished, the film 30 starts to be wound. However, since the film 30 is exposed while moving at v ₁ , the deceleration operation is not necessary even after the winding of one frame is completed. When the film 30 is wound up by one frame while keeping v _1, the second exposure is performed in the section SS2. Since the exposure operation is two-frame photography, the film 30 must be stopped after the second exposure is completed. Therefore, the section T of (a)
_The film 30 is wound by the same operation as _{1 to} T ₄ .
In the operation of (b), the sections T ₂ and T in (a) are
₃ ... No time loss with T ₀ . Therefore, the transition from the first exposure operation to the second exposure operation becomes faster. (C) is an operation when the shutter speed is 1/4000. At 1/4000, the moving speed of the film is v
An operation to decelerate from ₁ to v ₂ is required. Due to the loss of time generated by this operation, it becomes slower than the exposure operation at the time of 1/8000. (D) shutter speed is 1/2
This is the operation at the time of 000. At 1/2000, the film 30 cannot be exposed unless the film speed is v ₃ . Therefore the operation for decelerating the film moving speed from operation and v ₂ for decelerating from v ₁ to v ₂ to v ₃ are required. Therefore, the time loss is larger than the operation at the time of 1/4000.
However, compared to the operation shown in (a), the time required to shift from the first exposure operation to the second exposure operation is shorter.

The subroutine "rewind" based on FIG.
The operation of will be described. In S300, the D / A converter 1
Set v ₁ to 01 as the film moving speed. Then, in S302, the film winding / rewinding motor 119 is rotated counterclockwise. As a result, the film 30 is rewound onto the cartridge 70. Film 30 in S304
Clear the counter required to detect the movement amount of. S30
At 6, the counting operation of the counter is permitted. This counts the clock signal input to CLK.
In S308, data for one frame is read from the storage circuit 16. Then, this data is output from DATA in synchronization with the clock signal input to CLK. By this operation, data is recorded on the magnetic track. S310
Then, it waits until the value of the counter reaches 600. 60
When it reaches 0, the rewinding for one frame is completed. Therefore, in S312, the film counter is decremented. In S314, it is determined whether the film counter has reached 0. If it is not 0, the operation proceeds to S304 to continue the operation. When it reaches 0, the process proceeds to S316 and the motor 1
The drive of 19 is stopped.

[0043]

As described above in detail, in the present invention, continuous shooting is possible even if the film is not completely stopped, so that the continuous shooting speed can be increased.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an embodiment of the present invention.

FIG. 2 is a block configuration diagram showing the conceptual diagram of FIG. 1 in more detail.

FIG. 3 is a perspective view of the film control unit seen from behind.

FIG. 4 is a perspective view showing a film cartridge.

FIG. 5 is a block diagram showing a detailed configuration of a magnetic information control circuit and a film control unit.

FIG. 6 is a flowchart for explaining a main routine.

FIG. 7 is a diagram showing a relationship between shutter speed SS and film speed v.

FIG. 8 is a part of a flowchart for explaining an “exposure” subroutine.

FIG. 9 is a part of a flowchart for explaining an “exposure” subroutine.

FIG. 10 is a diagram for explaining an operation in a continuous shooting mode.

FIG. 11 is a flowchart for explaining the operation of the “rewind” subroutine.

FIG. 12 is a time chart for explaining the operation of the conventional camera.

[Explanation of symbols]

1 ... Film speed and position detecting means, 2 ... Winding motor, 3 ... Film, 4 ... CPU, 5 ... Shutter, 6 ...
Photometric means.

Claims (1)

[Claims] 1. A film speed detecting means for detecting a film moving speed during film winding, a winding film driving means for winding a film, a measuring means for measuring a brightness of an object, a shutter means for opening and closing a shutter, The shutter speed of the shutter means is determined based on the photometric value of the measuring means, and the determined shutter speed and the film speed detected by the film speed detecting means are predetermined with respect to the allowable blur amount of the image plane. A continuous shooting control means for controlling the shutter means and the film driving means so that the film moving means can continuously shoot the film when the relationship is satisfied. A camera that can shoot.