JP2007251656A - Image sensing device, its control method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the output signals of an image sensing device from deteriorating due to noises that occur when the driven unit is driven by the drive mechanism of a camera and to carry out an adjustment of a focal point at a high speed. <P>SOLUTION: When AF is carried out, an image sensing process is limited while the driven part is driven on the basis of the lens characteristics of a lens-replaceable camera system or the amount of noises contained in the output signals of an image sensing device and the level of noises caused by drive of a driven unit. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an imaging apparatus, a control method thereof, and a program, and in particular, during operation of a driving unit of the imaging apparatus according to a type of a photographing lens unit attached to the imaging apparatus and a noise amount in an output signal from the imaging unit. The present invention relates to an imaging apparatus capable of selectively inhibiting the operation of an imaging means of the imaging apparatus, a control method thereof, and a program for causing a computer to execute the control method.

  In an image pickup system that generates an image signal based on an electric signal from an image pickup element, a focus state, a diaphragm, a zoom position, and the like are generally controlled by electrically driving a lens or the like. However, a motor, which is a driving unit that generates the electric driving force, generates electrical noise that degrades a readout signal from the image sensor depending on the type of the motor.

Therefore, the operation timing of both means is controlled so that the electric drive means for driving the driven part such as the lens drive mechanism, the exposure control mechanism, and the film winding mechanism and the image pickup means for picking up the subject image do not operate simultaneously in parallel. A camera that prevents signal degradation is known (for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-142686

  However, according to the operation timing control in the camera described in Patent Document 1, simultaneous parallel operation (hereinafter referred to as simultaneous operation) of the drive unit and the imaging unit is always prohibited. That is, when no noise is generated, the simultaneous operation is prohibited even though it is not necessary to prohibit the simultaneous operation. For this reason, the required drive time of the driven part by the drive means is increased accordingly. This is particularly noticeable in the case of a camera to which the taking lens unit can be attached and detached, such as a single-lens reflex camera. In other words, the lens unit may or may not generate noise because the lens unit produced in the past does not take measures against motor noise. When a lens unit that is unlikely to generate noise is attached to a camera (imaging device), it is unnecessary to prohibit simultaneous operation of the driving unit and the imaging unit as described in Patent Document 1.

  An object of the present invention is to make an computer execute an imaging apparatus capable of preventing deterioration of an output signal of an imaging means due to noise generated when a driven part is driven by the driving means of the imaging apparatus, and a control method thereof. Is to provide a program for the purpose.

  In order to achieve the above object, as a technical feature of the present invention, there is provided a control method of an image pickup apparatus having an image pickup means for outputting an electric signal in accordance with an input subject light, wherein the drive unit is driven. The timing of the drive control operation of the driven part and the output operation of the electric signal by the image pickup means are made different as the noise amount of the electric signal increases.

  According to the present invention, it is possible to prevent the output signal from the imaging means from being deteriorated or further deteriorated. Further, it is possible to realize a high speed driving operation of the driving means and a high speed imaging operation of the imaging means.

  Hereinafter, an imaging device according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a single-lens reflex digital camera system including a digital camera which is an imaging apparatus according to a first embodiment of the present invention.

  As shown in FIG. 1, the digital camera system includes a digital camera 200 and a photographing lens unit 100 (imaging optical system) that can be attached to and detached from the digital camera 200 via a mount mechanism (not shown). The mount mechanism is provided with an electrical contact group 107, and when the lens unit 100 is attached to the camera 200, each contact of the contact group 107 is closed. Various electrical signals such as control signals, status signals, and data signals are exchanged between the camera 200 and the lens unit 100 via the contact group 107. Various voltage currents are supplied to each part of the camera 200 and the lens unit 100. When the contact group 107 is closed, the system controller 223 of the camera 200 determines whether the lens unit 100 is attached to the camera 200. Accordingly, communication can be performed between the digital camera 200 and the photographing lens unit 100, and the photographing lens 101 and the diaphragm 102 in the photographing lens unit 100 can be driven. Further, the contact group 107 may be configured to transmit not only an electrical signal but also an optical signal, an audio signal, and the like.

  For the sake of illustration, only one photographing lens 101 is shown in FIG. 1, but it is well known that many lenses such as a focus lens and a zoom lens are actually used. A shooting light beam (subject light beam) from a subject image (not shown) is guided to the quick return mirror 202 of the camera 200 through the shooting lens 101 and the diaphragm 102 of the lens unit 100. The quick return mirror 202 is supported so as to be movable between a mirror down position and a mirror up position and to be rotatable around a mirror rotation axis. The central portion of the quick return mirror 202 is a half mirror. When the quick return mirror 202 is positioned at the mirror-down position as shown in FIG. 1, a part of the subject light beam can pass through the quick return mirror 202. The transmitted light beam is reflected downward by the sub-mirror 203 installed on the quick return mirror 202 and is incident on a well-known phase difference AF sensor unit 204. For example, the AF sensor unit 204 includes a plurality of line sensors each including a field lens, a reflecting mirror, a secondary imaging lens, a diaphragm, and a CCD. The focus detection circuit 205 controls the AF sensor unit 204 in accordance with a control signal from the system controller 223, and performs focus detection by a known phase difference detection method.

  On the other hand, the photographing light beam reflected by the quick return mirror 202 reaches the eyes of the photographer through the pentaprism 201 and the eyepiece lens 206.

  When the quick return mirror 202 is positioned at the mirror-up position, the light beam from the photographic lens 101 passes through the aperture 102, the focal plane shutter 208 that is a mechanical shutter, and the filter 209, and is an image pickup device that is an image pickup unit. To the image sensor 210. The image sensor 210 is preferably composed of a solid-state imaging device such as a CCD or CMOS, but may be an imaging tube such as a silver salt film or a vidicon.

  The filter 209 has a function of cutting infrared rays and guiding only visible light to the image sensor 210 and a function as an optical low-pass filter. The focal plane shutter 208 has a front curtain and a rear curtain, and controls transmission and blocking of a light beam incident on the shutter 208 from the photographing lens 101. The sub mirror 203 is folded when the quick return mirror 202 is up.

  A system controller 223 (hereinafter also referred to as a CPU 223) of the digital camera 200 functions as a control unit that is configured by the CPU and controls the entire digital camera 200, and appropriately controls the operation of each part of the camera.

  The system controller 223 is connected to the lens control circuit 104 and the aperture control circuit 106 in the photographing lens unit 100 via a contact group 107. The system controller 223 controls, via the lens control circuit 104, the lens driving mechanism 103 that moves the photographing lens 101 in the optical axis direction and performs focusing. Thereby, a subject image is formed on the image sensor 210. Further, the system controller 223 controls the aperture driving mechanism 105 that drives the aperture 102 via the aperture control circuit 106 according to the set Av value (aperture value).

  The lens control circuit 104 has a lens information storage device (not shown) that stores lens-specific information (for example, focal length, wide aperture, and lens ID assigned to each lens). This lens information storage device stores information received from the sequence controller 223 of the digital camera 200 in addition to lens-specific information.

  The system controller 223 also controls the up / down driving of the quick return mirror 202 and the shutter charge / mirror driving mechanism 211 for controlling the shutter charge of the focal plane shutter 208, and the traveling of the front and rear curtains of the focal plane shutter 208. A shutter control mechanism 212 is connected. The drive source of the front and rear curtains of the focal plane shutter 208 is constituted by a spring, and a spring charge is required for the next operation after the shutter travels. The shutter charge / mirror drive mechanism 211 controls this spring charge. Further, the click return mirror 202 is raised and lowered by the shutter charge / mirror drive mechanism 211.

  The system controller 223 is connected to a photometric circuit 207 that is an automatic exposure device. The photometric circuit 207 is connected to a photometric sensor (not shown) disposed in the vicinity of the eyepiece lens 206. The photometric sensor measures the luminance of the subject, and its output is supplied to the system controller 223 via the photometric circuit 207. The system controller 223 outputs a control signal to the shutter control mechanism 212 based on the set Tv value (shutter speed). The shutter control mechanism 212 controls the traveling of the front curtain and rear curtain of the focal plane shutter 208.

  Further, an EEPROM 222 is connected to the system controller 223. The EEPROM 222 stores parameters that need to be adjusted to control the digital camera 200, camera ID information used for individual identification of the digital camera, AF correction data adjusted by the reference lens, automatic exposure correction value, and the like. Is configured.

  The system controller 223 is connected to an image data controller 220 constituted by a DSP (digital signal processor). The image data controller 220 executes control of the image sensor 210, correction and processing of image data input from the image sensor 210, based on instructions from the system controller 223. Auto white balance is also included in the image data correction and processing items. Auto white balance is a function that corrects a portion of maximum brightness in a captured image to a predetermined color (white). In auto white balance, the correction amount can be changed by a command from the system controller 223.

  The image data controller 220 receives a timing pulse signal from the timing pulse generation circuit 217 and the timing pulse generation circuit 217 that outputs a timing pulse signal necessary for driving the image sensor 210. An A / D converter 216 that converts an analog signal output from the sensor 210 and corresponding to a subject image into a digital signal, and a DRAM 221 that temporarily stores image data (digital data) obtained by the A / D conversion. It is connected. The DRAM 221 is used for temporarily storing image data before processing or data conversion into a predetermined format.

  A D / A converter 215 is connected to the image data controller 220. An LCD monitor device 213 is connected to the D / A converter 215 via an encoder circuit 214. The LCD monitor device 213 is a circuit that displays image data picked up by the image sensor 210, and generally includes a color liquid crystal display element. The image data controller 220 converts the image data on the DRAM 221 into an analog signal by the D / A converter 215 and outputs the analog signal to the encoder circuit 214. The encoder circuit 214 converts the output of the D / A converter 215 into a video signal (for example, an NTSC signal) necessary for driving the LCD monitor device 213.

  An image compression circuit 219 is connected to the image data controller 220. The image compression circuit 219 performs compression and conversion (for example, JPEG) of image data stored in the DRAM 221. The converted image data is stored in the recording medium 218. As the recording medium, a hard disk, a flash memory, a floppy (registered trademark) disk, or the like is used.

  A noise amount detection circuit 241 is connected to the image data controller 220 and the system controller 223, and constitutes a means for detecting the amount of noise included in the image.

  A contrast detection circuit 242 is connected to the image data controller 220. The contrast detection circuit 242 operates based on a command from the system controller 223, detects the contrast in a predetermined direction of the image data corrected by the image data controller 220, and stores the contrast evaluation value in the EEPROM 222.

  The system controller 223 further includes a communication interface circuit 224 provided for connection to an external communication terminal device, information on the operation mode of the digital camera 200, exposure information (shutter time, aperture value, etc.), and the like on the external liquid crystal display device 250. And an operation display circuit 225 displayed on the internal liquid crystal display device 251, a main electronic dial 226, an AF correction determination switch 227, and a measurement for selecting a focus detection position to be used from a plurality of focus detection positions of the AF sensor 204. A distance point selection button 228, a mode selection button 229 for setting a mode for causing the digital camera 200 to execute a desired operation by the user, and a first release switch (release) for starting a photographing preparation operation such as photometry and distance measurement. Switch SW1) 231 and the second release for starting the imaging operation And pitch (the release switch SW2) 230, an AF mode selection button 233, is connected to the metering mode selection button 235.

  The operation of the digital camera system configured as described above will be described in detail with reference to FIG.

  FIG. 2 is a flowchart showing a control procedure in the contrast AF mode in the digital camera system of FIG.

  In FIG. 2, in step S <b> 201, the system waits until a signal indicating that the power button of the digital camera 200 is pressed and the power is turned on or a signal indicating that the lens unit 100 is attached to the camera 200 is generated. If a signal is caught, it will transfer to step S202 (lens information acquisition means). In step S <b> 202, the camera 200 communicates with the currently mounted photographic lens unit 100 via the contact group 107 and acquires a lens ID representing the type of the photographic lens 101.

  In step S203, the acquired lens ID and the lens data stored in the EEPROM 222 are collated, and the lens driving motor constituting a part of the lens driving mechanism 103 of the lens unit 100 from the lens data corresponding to the acquired lens ID. Get motor information that represents the type. Here, in step S202, instead of acquiring the lens ID, a lens driving motor ID that makes it possible to identify the type of the lens driving motor and information that makes it possible to identify the noise generation level by the lens driving motor are obtained. It doesn't matter.

  In step S204, the lens unit 100 currently mounted on the digital camera 200 generates motor noise from the motor information and the like obtained in step S203, causing the output signal from the image sensor (imaging device) 210 to deteriorate. Determine if it is a thing. This determination may be made based on the type of motor or based on information indicating whether the noise level exceeds a predetermined amount.

  If it is determined that the output signal from the image sensor 210 is deteriorated, the process proceeds to step S205, and the continuous scan (continuous shooting) setting state is stored in the EEPROM 222 as a prohibited state. If it is determined that the output signal is not deteriorated, the process proceeds to step S206, and the continuous scan setting state is stored in the EEPROM 222 as the permitted state.

  If it is determined in step S207 that the first release switch 231 has been pressed for a long time, the process proceeds to step S208. In step S208, the quick return mirror 202 is positioned at the mirror up position, the shutter 208 is opened, and the image sensor 210 is brought into an exposure state.

  In step S209, the continuous scan setting state stored in the EEPROM 222 is acquired, and it is determined whether the continuous scan is prohibited or the continuous scan is permitted. If the continuous scan is prohibited, the process proceeds to step S210. If the continuous scan is permitted, the process proceeds to step S212.

  Here, the contrast AF in the continuous scan prohibition state in step S210 and the contrast AF in the continuous scan permission state in step S212 will be described with reference to the contrast AF timing chart shown in FIGS. 3 (a) and 3 (b). explain in detail.

  In general, contrast AF is a peak for detecting an in-focus state based on “exposure”, “accumulation”, “reading a signal from an image sensor”, “contrast evaluation of an image signal read from an image sensor”, and “contrast evaluation result” The lens is adjusted to the in-focus state by repeating a series of operations of “determination” and “lens driving for changing the focus state of the lens based on the contrast evaluation result” several times. Here, in order to increase the speed, it is conceivable to operate the imaging process and the lens driving process in parallel as shown in FIG. 3A. However, some lens units generate strong motor noise when driving the lens. is there. In the case of the parallel operation, there is a possibility that the output signal may be deteriorated due to the motor noise at the time of image pickup processing, in particular, reading of the output signal from the image pickup device. In this case, there is a problem that an appropriate result cannot be obtained in the subsequent contrast evaluation, and the accuracy of contrast AF is lowered.

  Therefore, in the present embodiment, this problem is solved by switching the control during contrast AF when the motor noise has an effect and when it is not.

  When there is no influence of motor noise, that is, in contrast AF in the continuous scan permission state shown in FIG. 3A, the imaging process is any one of “exposure”, “accumulation”, and “reading of a signal from the imaging device”. The lens can be driven even in this state. As a result, the imaging process and the lens driving process are performed separately and independently. However, this means that lens driving considering the influence of motor noise is not performed. That is, the contrast evaluation must be performed based on the signal read from the imaging signal, and it is necessary to synchronize the imaging process and the lens driving process in contrast evaluation.

  On the other hand, when there is an influence of motor noise, that is, during contrast AF in the continuous scan prohibited state shown in FIG. 3B, “exposure”, “accumulation”, “signal readout processing from the image sensor” Is controlled not to be executed simultaneously with lens driving. Thereby, the output signal from the image sensor due to motor noise is prevented from deteriorating.

  In each of steps S211 and S213 in FIG. 2, a case where the in-focus state, which is a contrast AF end condition, or a case where the first release switch 231 is turned off is detected, and any one end condition is detected. If the establishment of is detected, the contrast AF is terminated.

  As described above, in this embodiment, the digital camera 200 communicates with the photographing lens unit 100 attached to the digital camera 200 to acquire lens characteristics, and determines whether or not motor noise occurs or is likely to occur. I do. And the setting state of the continuous scanning process which performs an imaging process and a lens drive process in parallel is switched between a permission state and a prohibition state according to the determination result regarding noise generation. As a result, it is possible to prevent deterioration of the output signal from the image sensor due to motor noise during contrast AF. Further, for a lens unit in which the influence of motor noise is a predetermined level or less, the imaging AF and the lens driving process are performed in parallel, so that the contrast AF can be speeded up.

  In the present embodiment, the control method for switching between the state in which the parallel operation of the image pickup unit and the lens driving unit is prohibited and the state in which it is allowed during contrast AF has been described in consideration of the influence of motor noise. The application target of is not limited to this.

  For example, as described in Japanese Patent Laid-Open No. 2000-292684, the present invention can also be applied to AF calibration that corrects phase difference AF using contrast AF. In this case, the focus position is adjusted according to the focus state detected based on the phase difference of the output signals from each of the pair of sensor arrays that output signals in accordance with the incident light. Phase difference AF means, corresponding to the AF sensor 204, the focus detection circuit 205, the system controller 223, the lens control circuit 104, and the lens driving mechanism 103 in FIG. 1))) and the contrast from the image signal of the image sensor Second focus detection means for performing autofocus by evaluating the above (corresponding to image sensor 210, A / D converter 216, timing pulse generation circuit 217, image data controller 220, system controller 223, and contrast detection circuit 242 in FIG. 1) Relative shift amount is calculated from autofocus data from It is. Then, the detection error of the first focus detection unit is corrected by adding correction based on the relative deviation amount to the autofocus data of the first focus detection unit (AF calibration for calibrating the phase difference AF unit). means). Further, when the AF calibration unit operates, continuous imaging of the imaging unit with driving of the driving unit is limited according to the lens information.

  Further, the present invention can be applied to a case where live view display is performed by performing continuous scanning (continuous shooting), or when moving image recording (continuous shooting) is performed. Imaging will be limited. In the present embodiment, the application example to the single-lens reflex type digital camera system has been described. However, the application example of the present invention is not limited to the single-lens reflex type digital camera system.

  Next, an imaging apparatus according to the second embodiment of the present invention will be described.

  Although the interchangeable lens type camera is used in the first embodiment, the camera used in this embodiment is not limited to this. That is, in this embodiment, a camera in which the lens unit and the camera unit are integrated may be used, and even in such an integrated camera, the simultaneous parallel operation of the imaging unit and the lens driving unit is selectively prohibited to prevent noise. In the case where noise is not generated while realizing the imaging that avoids the influence of the above, the simultaneous parallel operation is allowed and the drive control time of the imaging is reduced.

  The control method according to this embodiment is switched between a state in which simultaneous parallel operation of the image pickup unit and the lens driving unit is prohibited and a state in which it is allowed at the time of contrast AF based on a noise level included in an output signal from the image pickup device with reference to FIG. Will be described. Note that the basic configuration of the camera system in the second embodiment is the same as that in the first embodiment, and thus description thereof is omitted here. Also, in FIG. 4, description of steps having the same numbers as those in the flowchart of FIG. 2 according to the first embodiment is omitted.

  In FIG. 4, in step S <b> 401 following step S <b> 201, one image is taken without opening the shutter, and an output signal is read from the image sensor 210 and stored in the DRAM 221. In step S <b> 402, one lens is shot without opening the shutter while driving the lens with the same shooting parameters as in step S <b> 401, and an output signal is read from the image sensor 210 and stored in the DRAM 221.

  In step S403, the total two image signals stored in the DRAM 221 in each of step S401 and step S402 are sent to the noise detection circuit 241 to extract the difference between the two images to detect the motor noise amount during lens driving. The detected motor noise amount is stored in the EEPROM 222.

  In step S404, it is determined whether or not the amount of noise stored in the EEPROM 222 in step S403 exceeds a predetermined level. If it exceeds the predetermined level, it is determined that there is an influence of motor noise, and the process proceeds to step S205. If the amount of noise does not exceed the predetermined level, the process proceeds to step S206.

  In the noise determination in the present embodiment, it is not necessary to perform communication with the photographing lens unit 100 and thereby acquire a lens ID that makes it possible to identify the type of lens and other information indicating lens characteristics. Further, it is not necessary to provide the camera unit with information for determining the lens driving motor from the lens ID. Therefore, a noise level can be determined by a similar noise determination unit even in a lens that does not have a lens ID or a lens that will be developed in the future, and the switching control of continuous scanning can be performed based on the result.

  That is, when it is determined that the output signal from the image sensor is largely deteriorated due to motor noise, it is possible to prevent the output signal from being deteriorated by separately executing the imaging process and the lens driving process. . In addition, since the operation of the imaging process and the motor drive process is switched depending on whether the noise is high or low, the speed can be increased.

  The object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus, and a computer (or CPU, MPU, etc.) of the system or apparatus. Is also achieved by reading and executing the program code stored in the storage medium.

  In this case, the program code itself read from the storage medium realizes the novel function of the present invention, and the program code and the storage medium storing the program code constitute the present invention.

  The storage medium for supplying the program code is, for example, a flexible disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW. Magnetic tape, nonvolatile memory card, ROM, etc. can be used.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (Operating System) running on the computer based on the instruction of the program code. Includes a case where the functions of the above-described embodiments are realized by performing part or all of the actual processing.

  Further, after the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. This includes the case where the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

1 is a block diagram of a single-lens reflex digital camera system according to a first embodiment of the present invention. 3 is a flowchart showing a control procedure in a contrast AF mode in the digital camera system shown in FIG. 1. It is a timing chart at the time of contrast AF, (a) shows the case where the parallel operation | movement of an imaging process and a lens drive process is permitted, (b) shows the case where a parallel operation is prohibited. It is a flowchart which shows the control procedure in contrast AF mode in the digital camera system which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Shooting lens unit 101 Shooting lens 102 Aperture 103 Lens drive mechanism 104 Lens control circuit 105 Aperture drive mechanism 106 Aperture control circuit 200 Digital camera 204 AF sensor 205 Focus detection circuit 207 Photometry circuit 210 Image sensor 217 Timing pulse generation circuit 218 Image data recording Media 220 Image data controller 221 DRAM
222 EEPROM
223 System controller 228 AF point selection button 229 Shooting mode selection button
230 Second release switch 231 First release switch 233 AF mode selection button
235 Metering mode selection button 241 Noise detection circuit 242 Contrast detection circuit

Claims (10)

Drive control means for controlling the drive of the driven part;
Imaging means for outputting an electrical signal in accordance with the input subject light,
The timing of the drive control operation of the driven unit by the drive control unit and the output operation of the electrical signal by the imaging unit are made different as the amount of noise of the electrical signal by driving the driven unit increases. An imaging device. An imaging apparatus in which an imaging optical system having a driven part and a driving means for driving the driven part is detachable,
Imaging means for outputting an electrical signal in accordance with the input subject light;
Information acquisition means for acquiring information from the mounted imaging optical system;
Control means for limiting continuous imaging by the imaging means with driving of the driving means according to the information obtained by the information acquisition means;
An imaging device comprising: Imaging means for outputting an electrical signal in accordance with the input subject light;
Noise amount detection means for detecting the amount of noise included in the electrical signal output from the imaging means;
Control means for restricting continuous imaging of the imaging means with driving of the driving means for driving the driven part according to the amount of noise obtained by the noise amount detecting means;
An imaging device comprising:   The noise amount detection means picks up an image without opening the shutter and outputs the first electric signal output from the image pickup means, and the drive means drives the driven portion and outputs the image. The imaging apparatus according to claim 3, wherein the noise amount is detected based on a second electrical signal.   The restriction on the continuous imaging of the imaging unit by the control unit is to shift the operation timing of the imaging unit and the operation timing of the driving unit, according to any one of claims 2 to 4. The imaging device described.   The imaging apparatus according to claim 1, wherein the driven unit includes at least one of a focus lens, a zoom lens, and a diaphragm. A method for controlling an image pickup apparatus having an image pickup means for outputting an electric signal in accordance with input subject light,
A control method characterized in that the timing of the drive control operation of the driven unit and the output operation of the electrical signal by the imaging means are made different as the amount of noise of the electrical signal due to driving of the driven unit increases. A control method for an image pickup apparatus having an image pickup means that is detachable from an image pickup optical system having a driven part and a drive means for driving the driven part, and that outputs an electric signal in accordance with input subject light. And
An information acquisition step of acquiring information from the mounted imaging optical system;
A control step of restricting continuous imaging by the imaging unit with driving of the driving unit according to the information obtained in the information acquisition step;
A control method characterized by comprising: A method for controlling an image pickup apparatus having an image pickup means for outputting an electric signal in accordance with input subject light,
A control step of restricting continuous imaging by the imaging means with driving of the driven part according to the amount of noise included in the output electrical signal;
A control method characterized by comprising:   The program for making a computer perform the control method of any one of Claim 7 thru | or 9.

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