GB2265989A - Control apparatus of focus and shutter of camera - Google Patents

Abstract

A focus and shutter control apparatus of a camera includes an actuating member (4A) which is driven by a reversible motor (1), an automatic focus control mechanism (50A) which determines a displacement of a focus adjusting lens in accordance with a displacement of the actuating member in one direction, and a shutter control mechanism (40) which determines the opening angle of the shutter mechanism in accordance with a displacement of the actuating member in the other direction. A shutter biasing means (114) biases the shutter mechanism in a direction to open the photographing aperture so that opening of the shutter mechanism is effected by the biasing means. Closing of the shutter mechanism is effected by movement of the actuating member in response to reversal of the motor. <IMAGE>

Description

CONTROL APPARATUS OF FOCUS AND SHUTTER OF CAMERA The present invention relates to a focus and shutter control apparatus for a lens shutter type of camera having an automatic focusing function (AF function) and an automatic exposure function (AE function).

In a camera having a photographing lens which has therein a focus lens and a lens shutter mechanism, the focus lens is moved to a focal point by the rotation of a single reversible motor in one direction and the lens shutter, which also serves as a diaphragm, is actuated to open at a predetermined diaphragm value (aperture) for a predetermined period of time by the rotation of the reversible motor in the reverse direction. In the conventional control apparatus, the operational speed of the shutter, at which the shutter is opened and closed, is determined by the rotational speed of the motor.Since the rotational speed of the motor is independent of the direction of rotation thereof, the characteristics of the opening and closing movement of the shutter describe an inverted symmetrical V-shape, an apex of which corresponds to the largest aperture, resulting in difficulties for realizing a high speed shutter. One solution thereto is to have a difference in the rotational speed of the motor between the forward rotation and the reverse rotation. However, there are many technological problems to be solved in obtaining such a motor.

Therefore the development of a high shutter speed has not been so rapid as expected.

An object of the present invention is to provide a lens shutter mechanism realizing a high speed shutter which eliminates the problem of the prior art as mentioned above.

According to the present invention, there is provided a focus and shutter control apparatus of a camera comprising: an actuating member drivable by a reversible motor; an automatic focus control member for setting a focused state in accordance with a movement of the actuating member towards a first direction; a shutter control member for moving a shutter mechanism to close in correspondence with a movement of the actuating member towards a second direction; biasing means for biasing said shutter mechanism to open whereby the shutter mechanism is moved to open by means of the biasing means and whereby the shutter mechanism is moved to close by means of movement of said actuating member in response to reversal of the motor.

If the shutter biasing means continuously biases the shutter mechanism to open the same, an electromagnetic holding mechanism which holds the shutter mechanism in a closed position against the shutter biasing means is additionally provided.

Preferably, the apparatus further comprises a control means whereby said motor is reversed after the shutter mechanism has completed movement to said determined opening angle.

Alternatively, the apparatus further comprises a control means whereby said motor is reversed before the shutter mechanism has completed movement to said determined opening angle.

Conveniently, the apparatus further comprises a shutter holding mechanism for maintaining the shutter mechanism in a closed position against the biasing means and for releasing the shutter mechanism when said actuating member has moved to a position for moving the shutter mechanism to said determined angle.

In one case, said shutter holding mechanism comprises an electromagnetic holding mechanism.

It is preferred that said biasing means continuously biases the shutter mechanism to open.

Conveniently, the biasing force of the biasing means increases in accordance with movement of the actuating member in the second direction to open the shutter mechanism.

In another embodiment, said actuating member includes an exposure setting cam portion and wherein a relative spacing between said portion and the shutter control member determines the opening angle, and wherein said relative spacing is variable with movement of the actuating member towards said second direction.

The apparatus may further comprise a detecting means for detecting the position of the actuating member.

Preferably, movement of the actuating member is stopped according to a detected object luminance during said movement of the automatic focus control member.

In another embodiment, movement of the actuating member is stopped according to a detected object luminance during said movement to open the shutter mechanism.

Conveniently, further movement of the actuating member, after release of said coupling, un-sets said focused state.

Reference is made to parent patent application number 9008290.0 from which the present application has been divided.

An example of the present invention will be described below in detail with reference to the accompanying drawings, in which: Fig. 1 is a schematic front elevational view before the operation of the apparatus starts; Fig. 2 is a view similar to Fig. 1, when a motor rotates in the clockwise direction; Fig. 3 is a view similar to Fig. 1, when the motor rotates in the counterclockwise direction; Fig. 4 is a time chart showing operations of the apparatus shown in Fig.

1; and, Fig. 5 is a time chart showing different operations of the apparatus shown in Fig. 1.

Figs. 1 through 5 show a focus and shutter control apparatus of the present invention in which a shutter biasing means continuously biases a shutter mechanism to open the same. Namely, the shutter is opened by a spring force and is closed by the movement of an actuating member 4A which is in turn actuated by the motor. Since the opening of the shutter is carried out by the spring force, not only a high speed shutter can be realised, but also a long exposure can be easily performed, for example by stopping the motor, because the closing of the shutter is effected by the motor.

In the embodiment illustrated in Figs. 1 through 5, automatic focus is effected by the movement of the actuating member 4A in the right hand direction and automatic exposure is effected by the movement of the actuating member 4A in the left hand direction.

A reversible motor 1 which is secured to a shutter base plate (not shown) has an output shaft 2 having a pinion 3 secured thereto. An actuating member 4A which has elongate holes 7 and 8 extending in the right and left hand directions in Fig. 1 is located on the shutter base plate. In the elongate holes 7 and 8 are fitted corresponding pins 5 and 6 which are secured to the shutter base plate so that the actuating member 4A can move in the direction of the length of the elongate holes 7 and 8, i. e. in the right and left hand directions in Fig. 1.

The actuating member 4A is provided on its lower edge with a rack 9 which is engaged by a double gear 10 which is in turn engaged by the pinion 3 so that the rotation of the motor 1 is transmitted to the actuating member 4A through the pinion 3, the double gear 10 and the rack 9. As a result, the actuating member 4A is moved in the right or left hand direction in Fig. 1 in accordance with the direction of rotation of the motor 1.

A detector 72 which detects the rotational displacement of the motor 1 has a light emitter 70, a light receiver 71 which is opposed to the light emitter 70, and a light interrupter 73 which is mounted to the drive shaft 2 of the motor 1 to periodically interrupt light of the light emitter 70.

A control circuit 80 is electrically connected to the motor 1 and the light emitter 70, and the light receiver 71, respectively. An AF object distance measuring circuit of an AF object distance measuring device, an AE photometering circuit of an AE photometer and a power source are also connected to the control circuit 80.

On the shutter base plate is provided an automatic focus drive member 50A which has elongate holes 53 and 54 in which guide pins 51 and 52, provided on the shutter base plate, are fitted so that the automatic focus drive member 50 can be moved in the right or left hand directions in Fig. 1, similar to the actuating member 4A.

The automatic focus drive member 50A is continuously biased by a coil spring 55A in the left hand direction so that the automatic focus drive member 50A bears at the left end edge 50a thereof against a right bent end 4a of the actuating member 4A. The movement of the automatic focus drive member 50A in the left hand direction is restricted by a stop pin 56A.

Ratchet teeth 59 are formed on the lower edge of the automatic focus drive member 50A and are engaged by the engaging end of an engaging lever 63A which is pivoted to the shutter base plate through a shaft 61A. The engaging lever 63A is biased to rotate in the counterclockwise direction to engage with the ratchet teeth 59.

The actuating member 4A has an extension arm 4b which is provided on its front end with a releasing pin 64A which comes into engagement with the engaging lever 63A when the actuating member 4A moves in the left hand direction by a predetermined displacement to release the engaging thereof with the automatic focus drive member 50A.

A shutter mechanism 40 has a sector 41 which is composed of two blades to open and close a lens aperture Ap. For clarification, only one blade of the sector 41 is shown in Fig. 1. The sector 41 is rotatably attached to the shutter base plate by a pivot shaft 42.

An automatic exposure drive member 30A which drives the shutter mechanism 40 is in the form of a crank lever which is rotatably supported by the shutter base plate through a shaft 113. The automatic exposure drive member 30A is provided on its arms with a pin 43A and a follower pin 115 with the pin 43A fitted in an elongate hole 41a formed in the sector 41. The automatic exposure drive member 30A is biased by a tensile spring 114 in a direction in which the sector 41 is opened.

Against the tensile spring 114, the automatic exposure drive member 30A is maintained at a closed position, in which the sector is closed, by a magnet 81. The magnet 81, when energized, attracts an armature 117 which is provided on the automatic exposure drive member 30A to maintain the sector 41 in the closed position against the tensile spring 114. The supply of the electrical power to the magnet 81 is controlled by the control circuit 80.

On the upper edge of the actuating member 4A are provided an exposure setting cam portion 116 which is engaged by the follower pin 115 of the automatic exposure drive member 30A and a switch cam portion 131. The cam portion 116 has an oblique cam surface which comes into engagement with the follower pin 115 to determined the sector angle. Consequently, the sector angle is determined by the point at which the follower pin 115 engages with the cam portion 116 during the movement of the actuating member 4A within the automatic exposure control area. The upper end of the cam portion 116 is connected to a horizontal edge 116a to keep the sector in the closed position.

A switch 123 which detects the position of the actuating member 4A is actuated by the switch cam portion 131 of the actuating member 4A through a switch lever 127.

In a coil portion 123a of the switch 123, which is made of a torsion spring, is loosely inserted an insulation pin 124 provided on the shutter base plate above the left end of the actuating member 4A. Movable contacts 123b and 123c of the switch 123 are located at the two bottom apexes of an imaginary triangle defined by the movable contacts and the insulation pin 124 which is located at the remaining apex of the triangle.

The movable contacts 123b and 123c are elastically engaged by contact pins 125 and 126 provided on the shutter base plate, respectively. The contact pins 125 and 126 are electrically connected to the control circuit 80.

The switch lever 127 is pivoted to the shutter base plate through a pin 128 and is biased to rotate in the clockwise direction by a coil spring 129.

An insulation pin 130 provided on the switch lever 127 at one end thereof is pressed against the switch cam portion 131, which is formed on the upper edge of the actuating member 4A, by the coil spring 129. The switch lever 127 is provided on its opposite end with an insulation pin 132 to separate the movable contact 123c from the contract pin 126.

The lower end of the switch cam portion 131 is connected to the horizontal edge portion 116a which maintains the insulation pin 132 separate from the movable contact 123c. The upper end of the switch cam portion 131 is connected to a horizontal edge 131a which causes the insulation pin 132 to engage with the movable contact 123c to maintain the latter separate from the contact pin 126.

The apparatus of the invention operates as follows.

When the release button (not shown) of a camera is pushed down in a position shown in Fig. 1, the AF object distance measuring and the AE photmetering can be effected. A command signal is supplied from the control circuit 80 to the reversible motor 1, in accordance with the detection signals, to rotate the motor 1 in the counterclockwise direction.

When the motor 1 rotates in the counterclockwise direction, the actuating member 4A begins moving in the right direction as in Fig. 2. This corresponds to time T1 in Fig. 4(A).

When the actuating member 4A moves right in Fig. 1, the switch cam portion 131 pushes the pin 130, and accordingly, the switch lever 127 rotates in the counterclockwise direction. As a result, the insulation pin 132 pushes the movable contact 123c cf the switch 123 so that the movable contact 123c separates from the associated contact pin 126 to mdke the switch 123 OFF.

This corresponds to time T1 in Fig. 4(C).

When the OFF signal of the switch 123 is detected in the control circuit 80, the control circuit 80 counts the number of pulses generated by the light receiver 71 of the rotational displacement detector 72 of the motor 1. The displacement of the actuating member 4A in the right direction is arithmetically determined by the counted number of pulses.

When the actuating member 4A moves right, the bent end 4a thereof pushes the left edge 50a of the automatic focus drive member 50A so that the automatic focus drive member 50A moves in the same direction against the coil spring 55A. Since the follower pin 115 of the automatic exposure drive member 30A engages with the horizontal edge portion 116a of the actuating member 4A, the automatic exposure drive member 30A does not move, and accordingly, the sector 40 maintains the lens aperture Ap in the closed position.

When the actuating member 4A has moved right and hence moved the photographing lens 57 in the same direction by a displacement corresponding to the detected focal length (the object distance), the control circuit 80 commands the motor 1 to rotate in the reverse direction (clockwise direction).

The rotation of the motor 1 in the clockwise direction causes the actuating member 4A to move left from a position shown in Fig. 2. However, since the ratchet teeth 59 are engaged by the engaging lever 63A, the automatic focus drive member 50A does not move, so that the automatically set position of the lens 57 is maintained, as shown in Fig. 4(E).

When the actuating member 4A comes to the initial position shown in Fig.

1, the pin 130 of the switch lever 127 moves from the horizontal edge portion 131a of the actuating member 4A to the switch cam portion 131. As a result, the lever 127 rotates in the clockwise direction so that the insulation pin 132 separates from the movable contact 123c of the switch 123. Consequently, the switch 123 is made ON. This corresponds to time T3 in Fig. 4(c).

The ON signal of the switch 123 is detected in the control circuit 80 so that the latter again counts the number of pulses generated from the light receiver 71 of the detector 72 to arithmetically determine the displacement of the actuating member 4A in the left direction from the initial position.

Thus, the actuating member 4A is moved to the automatic exposure control area.

The control circuit 80, when it receives the ON signal of the switch 123, supplied electrical power to the electromagnet 81 to energize the latter.

As a result, the armature 117 is attracted by the electromagnet 81.

Accordingly, even when the cam portion 116 comes to a position in which it is opposed to the follower pin 115 of the automatic exposure drive member 30A, neither the automatic exposure drive member 30A not the sector 41 move so that the lens aperture Ap is kept closed.

When the actuating member 4A comes to a position corresponding to the optimum exposure detected by the AE photometer, that is, when the pin 115 of the automatic exposure drive member 30A comes to be opposed to the portion of the cam portion 116 that gives an optimum exposure, the control circuit 80 stops the motor 1 to stop the actuating member 4A. This corresponds to time T4 in Fig. 4. In this state, there is a gap between the follower pin 115 of the automatic exposure drive member 30A and the portion of the cam portion 116 mentioned above. The gap corresponds to the opening angle of the sector 41.

When no electrical power is supplied to the electromagnet 81, the armature 117 is released from the electromagnet 81. Therefore, when the electromagnet 81 is inactivated, the automatic exposure drive member 30A is quickly rotated until the pin 115 is brought into engagement with the cam portion 116 by the spring force of the coil spring 114. At the same time, the sector 41 of the shutter mechanism 40 is quickly rotated to open the lens aperture, as shown in Fig. 3. Namely, the shutter is opened by the spring force. The wave shape of the opening movement of the sector 41 is as shown in Fig. 4(F) in which a quick movement from the closed position to the open position takes place.

After the lapse of a predetermined exposure time, at time T5, the motor 1, which has stopped, begins rotating again in the counterclockwise direction.

The rotation of the motor 1 in the counterclockwise direction causes the actuating member tA to move right from the position shown in Fig. 3 so that the cam portion 116 pushes the follower pin 115. As a result, the automatic exposure drive member 30A is rotated in the clockwise direction so that the sector 41 rotates in the counterclockwise direction to close the lens aperture Ap.

When the actuating member 4A comes to the initial position, the lens aperture Ap is closed by the engagement of the pin 115 and the horizontal edge portion 116a. This corresponds to time T6 in Fig. 4(F).

When the actuating member 4A passes the initial position, the insulation pin 130 comes into abutment with the switch cam portion 131 to rotate the switch lever 127 so that the insulation pin 132 of the switch lever 127 engages with the movable contact 123c of the switch 123 to temporarily make the switch 123 OFF. This corresponds to time T6 in Fig. 4(C). The OFF signal is detected by the control circuit 80 so that the motor 1 is reversed in the clockwise direction.

Thereafter, the actuating member 4A moves left toward the automatic exposure control area so that the insulation pin 132 separates from the movable contact 123c to make the switch 123 ON again.

In accordance with the ON signal of the switch 123, the control circuit 80 counts the number of pulses generated from the light receiver 71 to determine the displacement of the actuating member 4A in the left hand direction. At the same time, the electromagnet 81 is energized to attract the armature 117. As a result, the automatic exposure drive member 3 0A maintains the lens aperture Ap in the closed position.

A further movement of the actuating member 4A in the left hand direction beyond the automatic exposure control area causes the pin 64A of the extension arm 4b of the actuating member 4A to engage the engaging lever 63A to rotate the latter in the counterclockwise direction. Consequently, the engaging lever 63A, which had been engaged by the ratchet teeth 59 is disengaged therefrom so that the automatic focus drive member 50A is moved left by the spring 55A to be returned to the initial position in which it bears against the stop pin 56A.

After the automatic focus drive member 50A is returned to the initial position, the motor 1 is rotated in the counterclockwise direction at time T7 in Fig. 4, so that the actuating member 4A begins moving from the abovementioned position beyond the automatic exposure control area in the right hand direction. When the actuating member 4A is returned to the initial position shown in Fig. 1, a slight movement of the actuating member 4A in the right hand direction causes the switch lever 127 to be rotated in the counterclockwise direction by the switch cam portion 131 so that the insulation pin 132 causes the movable contact 123c to separate from the contact pin 126 to make the switch OFF. This corresponds to time T8 in Fig.

4.

The OFF signal is detected by the control circuit 80 so that the control circuit 80 rotates the motor 1 in the clockwise direction to move the actuating member 4A in the left hand direction. By a slight movement of the actuating member 4A in the left hand direction, the switch lever 127 is rotated in the clockwise direction by the switch cam portion 131 so that the insulation pin 132 separates from the movable contact 123c to make the switch ON.

Then the motor 1 is stopped and the actuating member 4A is returned to the initial position shown in Fig. 1. Simultaneously, the supply to the electromagnet 81 is stopped so that sequential operations for a series of automatic focus control and automatic exposure control are finished.

With the present invention, since the follower pin 115 is brought into contact with the cam portion 116 to open the sector 41 when the closed position of the sector 41 is released by the electromagnet 81, a very quick opening operation of the sector 41 can be performed to realize a high speed shutter.

Furthermore, since the opening angle of the sector 41 is determined by the displacement of the actuating member 4A having the cam portion 116, and since the actuating member 4A can be slowly, precisely and certainly moved by the motor 1, a desired exposure can be precisely obtained.

Fig. 5 shows another embodiment of the present invention.

In the embodiment illustrated in Fig. 4, the motor 1 is stopped when the follower pin 115 is opposed to the portion of the cam portion 116 that gives a desired exposure. After the lapse of a predetermined time, the motor 1 is driven again to cause the cam portion 116 to close the sector 41. Thus, a long period of exposure time can be realized, as mentioned before.

However, it takes a certain interval of time (several tens of milliseconds) to restart the motor which has been stopped. This has an adverse influence on a quick closing of the shutter.

The embodiment illustrated in Fig. 5 is directed to an improvement thereof.

In Fig. 5 the operations from time T1 to time T3 and the operations after time T6 are the same as those in Fig. 4.

The actuating member 4A begins moving left at time T2 and is returned to the initial position at time T3. Thereafter, the actuating member 4A moves further in the left hand direction to come to the terminal end of the automatic control exposure area. This corresponds to time T4' in Fig. 5 at which the control circuit 80 issues a command signal to the motor 1 to rotate in the counterclockwise direction at the terminal end of the automatic control exposure area, thereby to move the actuating member 4A in the right hand direction.

The displacement of the actuating member 4A is arithmetically controlled from time T3 at which the switch 123 is made ON. When the switch 123 is made ON, the control circuit 80 supplies electrical power to the electromagnet 81 so that the lens aperture Ap is maintained in the closed position by the sector 41.

When the actuating member 4A is moved by a predetermined displacement corresponding to a desired exposure detected by the AE photometer, that is, when the follower pin 115 is opposed to the portion to the cam portion 116 that gives a desired exposure, the control circuit 80 stops the supply of electrical power to the electromagnet 81. This corresponds to time T5' in Fig.

5.

At time T5', there is a gap between the follower pin 115 and the abovementioned portion of the cam portion 116 to determine the sector opening angle, similar to the embodiment shown in Fig. 4. When the supply to the electromagnet 81 is stopped, the pin 115 is quickly brought into contact with the cam portion 116 by the spring force of the coil spring 114 to open the shutter aperture Ap at a predetermined angle corresponding to a desired exposure.

A further movement of the actuating member 4A in the right direction causes the sector 41 to gradually close the lens aperture Ap in accordance with the profile of the cam portion 116 and completely closes the lens aperture to the initial position of the actuating member 4A. This corresponds to time T6 in Fig. 5.

When the actuating member 4A passes the initial position, the insulation pin 130 comes into engagement with the switch cam portion 131 to temporarily make the switch 123 OFF. The OFF signal is detected by the control circuit 80 and the motor 1 is rotated in the clockwise direction. The subsequent operations are the same as those in Fig. 4 With the embodiment illustrated in Fig. 5, since the engagement of the pin 115 with the cam portion 116 is effected during the movement of the actuating member 4A in the direction to close the sector 41, the closing operation of the sector 41 can be more quickly carried out than the embodiment shown in Fig. 4, thus resulting in a higher shutter speed.

It should be appreciated that various modifications can be applied to the embodiment illustrated in Figs. 1 through 3. For example, the actuating member 4A and the automatic focus drive member can be concentrically arranged with respect to the optical axis of the photographing lens 57.

It is possible to use a stepping motor as the motor 1 which is controlled by the control circuit 80 in which case the detector 72 which is comprised of the light emitter 70, the light receiver 71 and the interrupter 73 can be dispensed with.

As can be understood from the foregoing, with the embodiment illustrated in Figs. 1 through 5, since the contact portion of the automatic exposure control system is brought into contact with the exposure setting cam portion by a spring force or the like simultaneously with the release of the closing state of the sector by the electromagnet, the opening operation of the sector can be effected regardless of the number of revolutions of the motor and a quick opening of the lens aperture can be realized.

Furthermore, since the sector opening angle is determined by the displacement of the actuating member having the exposure setting cam portion and since the actuating member is slowly, certainly and precisely moved, it is possible to obtain an exact lens aperture from the sector to obtain a desired exposure.

In addition, since the closing operation of the sector, which is effected in association with the rotation of the motor, does not require a high precision of movement of the sector etc., in comparison with the opening operation thereof, a quick closing is made possible to realize a higher shutter speed.

Furthermore, since the actuating member which is moved between the automatic focus control area and the automatic exposure control area by the drive of the motor 1 releases the focused state set by the automatic focus control system after the completion of the exposure operation, the lens and shutter drive apparatus which can stably and reliably effect the abovementioned engaging and disengaging operations can be simplified.

Finally, with the present invention, since no magnet for automatic focusing is necessary, the apparatus can be simplified and made small and inexpensive.

Claims (13)

ClAIMS

1. A focus and shutter control apparatus of a camera comprising: an actuating member drivable by a reversible motor; an automatic focus control member for setting a focused state in accordance with a movement of the actuating member towards a first direction; a shutter control member for moving a shutter mechanism to close in correspondence with a movement of the actuating member towards a second direction; biasing means for biasing said shutter mechanism to open whereby the shutter mechanism is moved to open by means of the biasing means and whereby the shutter mechanism is moved to close by means of movement of said actuating member in response to reversal of the motor.

2. Apparatus as claimed in claim 1 comprising a control means whereby said motor is reversed after the shutter mechanism has completed movement to said determined opening angle.

3. Apparatus as claimed in claim 1 comprising a control means whereby said motor is reversed before the shutter mechanism has completed movement to said determined opening angle.

4. Apparatus as claimed in any preceding claim comprising a shutter holding mechanism for maintaining the shutter mechanism in a closed position against the biasing means and for releasing the shutter mechanism when said actuating member has moved to a position for moving the shutter mechanism to said determined angle.

5. Apparatus as claimed in claim 4 wherein said shutter holding mechanism comprises an electromagnetic holding mechanism.

6. Apparatus as claimed in any preceding claim wherein said biasing means continuously biases the shutter mechanism to open.

7. Apparatus as claimed in any preceding claim wherein the biasing force of the biasing means increases in accordance with movement of the actuating member in the second direction to open the shutter mechanism.

8. Apparatus as claimed in any preceding claim wherein said actuating member includes an exposure setting cam portion and wherein a relative spacing between said portion and the shutter control member determines the opening angle, and wherein said relative spacing is variable with movement of the actuating member towards said second direction.

9. Apparatus as claimed in any preceding claim further comprising a detecting means for detecting the position of the actuating member.

10. Apparatus as claimed in any preceding claim wherein movement of the actuating member is stopped according to a detected object luminance during said movement of the automatic focus control member.

11. Apparatus as claimed in any preceding claim wherein movement of the actuating member is stopped according to a detected object luminance during said movement to open the shutter mechanism.

12. Apparatus as claimed in any preceding claim wherein further movement of the actuating member, after release of said coupling, un-sets said focused state.

13. A focus and shutter control apparatus of a camera substantially as herein described with reference to the accompanying drawings.