JP2010231152A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress imaging in a defocused state, which results from a shake in the direction of an optical axis, by detecting the focused state of an imaging optical system. <P>SOLUTION: The imaging apparatus includes: an imaging optical system 102 for imaging a subject image on an imaging means 207; focus detecting means 203 and 204 for detecting a focused state of the imaging optical system; calculating means 106 and 107 for calculating a shake in the direction of an optical axis, which results from acceleration acting on the imaging optical system. If the amount of shake in the direction of the optical axis, calculated by the calculating means, is within a focused range when a focused state is detected by the focus detecting means, photographing is attainable. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an imaging apparatus having focus detection means for detecting a focus state of an imaging optical system.

  2. Description of the Related Art In recent years, an imaging apparatus such as a camera is generally provided with an automatic focusing apparatus that performs shooting after changing an optical system to a focused state. In particular, many digital single-lens reflex cameras include a secondary imaging phase difference type focus detection device. It is also possible to perform focus detection repeatedly at time intervals of several tens of milliseconds, and to perform in-focus and out-of-focus determination more accurately and quickly than other focus detection methods such as a contrast method. It is.

  On the other hand, in recent years, there are many imaging devices that are equipped with an angular velocity sensor such as a gyro sensor and perform angular shake correction based on the detected angular velocity of the imaging device. Furthermore, in Patent Document 1, so-called translational shake in a direction orthogonal to the optical axis, which is difficult to remove by using the output of the gyro sensor, is removed by the acceleration sensor output. In addition, Patent Document 1 includes a technique that includes an accelerometer to detect a slight movement in the optical axis direction, and enables correction of shake in the optical axis direction by measuring acceleration in the optical axis direction. It is disclosed.

JP 09-080523 A

  However, in a secondary imaging phase difference type focus detection device that is often mounted on a digital single-lens reflex camera, the integration time of an AF (autofocus) sensor becomes long when the subject is dark. Therefore, the imaging state cannot always be detected in a short cycle. In addition, since the imaging state is detected discontinuously, there is an interval between focus detections, especially when the integration time for detecting the imaging state is long, the imaging by the movement of the camera body The time when the state change cannot be recognized becomes a level that cannot be ignored.

  This problem becomes apparent when the subject deviates from the depth of field due to slight fluctuations in the optical axis direction under conditions with high imaging magnification (so-called macro imaging) such as equal magnification imaging. Therefore, an apparatus that can continuously detect the imaging state has been desired.

(Object of invention)
An object of the present invention is to provide an imaging apparatus capable of detecting an in-focus state of an imaging optical system and suppressing photographing in an out-of-focus state due to shake in the optical axis direction.

  In order to achieve the above object, the present invention provides an imaging optical system that forms an image of a subject on an imaging unit, a focus detection unit that detects a focusing state of the imaging optical system, and the imaging optical system. And an optical axis direction shake calculating means for calculating an optical axis direction shake calculating means for calculating an optical axis direction shake due to an acceleration acting on the optical axis, and when the in-focus state is detected by the focus detecting means, the optical axis direction shake calculating means Thus, the imaging apparatus can capture images when the shake amount calculated in the optical axis direction is within the in-focus range.

  ADVANTAGE OF THE INVENTION According to this invention, the imaging device which can detect the focusing state of an imaging optical system and can suppress imaging | photography in the out-of-focus state by an optical axis direction shake can be provided.

It is a block diagram which shows the outline of the imaging device which concerns on each Example of this invention. 1 is a block diagram illustrating a configuration of an imaging apparatus according to Embodiment 1. FIG. 3 is a flowchart showing the operation of the main part of the first embodiment. 3 is a timing chart for explaining the operation of the main part of the first embodiment. FIG. 6 is a block diagram illustrating a configuration of an imaging apparatus according to a second embodiment. 10 is a flowchart showing the operation of the main part of the second embodiment. 10 is a timing chart for explaining the operation of the main part of the second embodiment. FIG. 10 is a block diagram illustrating a configuration of an imaging apparatus according to a third embodiment. 12 is a flowchart showing the operation of the main part of the third embodiment. 12 is a timing chart for explaining the operation of the main part of the third embodiment.

  The best mode for carrying out the present invention is as shown in Examples 1 to 3 below.

  FIG. 1 is a configuration diagram showing an outline of an imaging apparatus (digital single-lens reflex camera) according to Embodiment 1 of the present invention.

  Inside the interchangeable lens 101, a focus lens 102 for focus adjustment, and a lens driving unit 103 that drives the focus lens 102 to change the imaging state of the focus lens 102 (imaging position of the subject) are provided. Yes. Further, a lens drive control unit 105 that controls the lens drive unit 103 is provided on the main board. Further, two axes included in a plane orthogonal to the optical axis 104 indicated by a one-dot chain line (the XY plane when the vertical direction in FIG. 1 is the Y direction and the vertical direction in the drawing is the X direction), and the optical axis direction An acceleration sensor 106 capable of measuring acceleration is provided. Further, an acceleration calculation unit 107 is provided on the main board to calculate the optical axis direction shake in the direction of the optical axis 104 by integrating the acceleration information measured by the acceleration sensor 106 in the second order.

  A camera main body 201 to / from which the interchangeable lens 101 is attached / detached via a lens mount is provided with a secondary imaging optical system 202. A part of the light beam that has passed through the interchangeable lens 101 is guided to the secondary imaging optical system 202. As a result, two images divided by the separator lens are formed on an AF (autofocus) sensor, which will be described later, and the in-focus state (in-focus state) of the focus lens 102 provided in the interchangeable lens 101 is determined from the amount of deviation between the two images. Movement amount) is calculated. Specifically, the imaging state of the subject, that is, the lens driving amount to the in-focus position of the focus lens 102 is calculated by the secondary imaging phase difference method.

  In the first embodiment, as will be described later, the output of the acceleration sensor 106 is further used in a form that complements the in-focus state detection operation that is intermittently performed only by the AF sensor. Thereby, it has higher time resolution and enables continuous determination of in-focus and out-of-focus rather than intermittent as in the prior art.

  FIG. 2 is a block diagram showing a configuration of main parts in the interchangeable lens 101 and the camera body 201 in the imaging apparatus having the above-described configuration, and the same parts as those in FIG.

  The release button 205 is a two-stage pressing switch mounted on the camera body 201, and the switch S1 for starting a shooting preparation operation such as focus detection is turned on by pressing up to the first stage, and the second stage is pressed. The switch S2 for starting the photographing operation is turned on by pressing until. When the switch S1 is turned on, the AF sensor 203 and the lens driving amount calculation unit 204 start focus detection (detection of the imaging state of the focus lens 102) by the secondary imaging phase difference method. Then, based on the calculated lens driving amount, lens driving which is a focus adjustment operation described later is started. After that, when the switch S2 is turned on by pressing the release button 205 up to the second stage, the photographing operation is performed by the image capturing unit 207 when the image capturing control unit 206 permits photographing as described later.

  In an actual imaging apparatus, the ON signal of the switch S1 is input to a camera microcomputer (not shown) provided in the camera body 201. Then, the AF sensor 203 performs photoelectric conversion of the subject image and accumulation operation of the signal (hereinafter simply referred to as accumulation) in accordance with an instruction from the camera microcomputer. Similarly, the lens driving amount calculation unit 204 calculates the imaging state of the focus lens 102 based on the accumulation result in accordance with an instruction from the camera microcomputer. An ON signal of the switch S2 is also input to the camera microcomputer, and the imaging control unit 206 performs an imaging unit 207 at a later-described timing based on information on an optical axis direction shake by an later-described acceleration calculation unit 107 according to an instruction from the camera microcomputer. Will be allowed to shoot. However, in FIG. 2, only the main part is shown for simplification of the drawing.

  In so-called macro photography, when the switch S1 is turned on as described above, the AF sensor 203 and the lens drive amount calculation unit 204 form an image of the subject, that is, the lens drive amount that is the amount of movement of the focus lens 102 to the focal point. Is calculated. The lens driving amount is input from the camera body 201 to the lens driving control unit 105 in the interchangeable lens 101. Then, the lens drive control unit 105 drives the focus lens 102 to the in-focus position according to the lens drive amount via the lens drive unit 103.

  In addition, an acceleration sensor 106 is provided in the interchangeable lens 101 as shown in FIG. 1, and an acceleration that varies in the direction of the optical axis 104 is always detected in accordance with an instruction from a lens microcomputer (not shown). The detected acceleration signal is output to the acceleration calculation unit 107, and the acceleration calculation unit 107 performs second-order integration of acceleration to calculate the displacement in the optical axis direction (optical axis shake).

  When the focus lens 102 reaches the in-focus position by the lens driving, the lens driving is stopped. However, as will be described later with reference to FIG. 4, the imaging state of the subject is continuously maintained by the AF sensor 203 and the lens driving amount calculation unit 204 thereafter. Is detected. Then, when it is determined that the focus lens 102 is in the in-focus range as a result of the subsequent imaging state detection, the output (information on shake in the optical axis direction) of the acceleration calculation unit 107 at that time is the position information of the focus lens 102. Reset as origin. Although details will be described later, this is an operation for correcting the drift of the second-order integral value of the acceleration output in the acceleration calculation unit 107.

  Thereafter, the lens drive control unit 105 does not drive the focus lens 102 until the switch S1 is turned off and the process returns to the start stage.

  Since the acceleration calculation unit 107 performs second-order integration, there is a concern about the instability of the calculation result. However, by performing the reset operation as described above, the calculation that tends to diverge is returned to the beginning, and the calculation of the acceleration calculation unit 107 is performed. Accuracy can be stabilized.

  Assume that the release button 205 is further pressed, the switch S2 is turned on, and an instruction to start shooting is given. Then, after the reset operation, the imaging control unit 206 only determines that the position of the focus lens 102 is in the in-focus range from the state of shake in the optical axis direction continuously calculated by the acceleration calculation unit 107. Imaging by the imaging unit 207 is permitted. As a result, a photographing operation is performed by the exposure amount adjusting unit (not shown) for adjusting the exposure amount and the imaging unit 207.

  Next, the operation of the main part of the series of the imaging apparatus will be described using the flowchart shown in FIG. This flowchart starts when the main power supply of the camera body 201 is turned on and ends when the main power supply is turned off. This flowchart is repeatedly executed while the main power supply is turned on.

  The operation is started from step # 101. First, in step # 102, the state of the switch S1 is determined. If it is not turned on, it waits in this step # 102 until it is turned on. Thereafter, when the switch S1 is turned on, the process proceeds to step # 103. Then, the AF sensor 203 and the lens driving amount calculation unit 204 detect the imaging state of the subject by the secondary imaging phase difference method, that is, detect the in-focus state of the focus lens 102 based on the accumulation result. If it is not in focus, the lens drive amount to the in-focus position is calculated. In the subsequent step # 104, the lens drive control unit 105 drives the focus lens 102 to the in-focus position via the lens drive unit 103 based on the calculated lens drive amount.

  In the next step # 105, it is determined whether or not the focus lens 102 has moved to the in-focus position. If it is determined that the focus lens 102 has been reached, the process proceeds to step # 106, and the drive of the focus lens 102 is completed. In the next step # 107, a camera microcomputer (not shown) causes the AF sensor 203 to perform accumulation again, and determines the imaging state of the subject based on the accumulation result. If it can be confirmed that the position is in the in-focus position, the information on the optical axis direction shake calculated by the second-order integration is reset by the acceleration calculation unit 107 at that time. Although details will be described later with reference to FIG. 4, the second-order integral value (displacement of the focus lens 102 in the direction of the optical axis 104) of the acceleration calculation unit 109 at the time of focusing is set to zero.

  On the other hand, if it is determined as a result of the imaging state of the subject that the focus lens 102 is not in the in-focus position, the lens driving control unit 105 and the lens driving unit 103 are used again based on the imaging state obtained at that time. The focus lens 102 is focused.

  In the next step # 108, the process waits until the release button 205 is pressed to the second stage and the switch S2 is turned on. It should be noted that if the release button 205 is not pressed until the first stage during this standby and the switch S1 is turned off, the process returns to step # 102.

  In the next step # 109, the process returns to step # 108 until it is determined that the position of the focus lens 102 is in the in-focus range from the information on the shake in the optical axis direction continuously calculated by the acceleration calculation unit 107. Repeat the operation. In other words, even when the switch S2 is turned on, if the focus lens 102 is not in the focus range (a predetermined range including the focus position (within the depth of field)) in consideration of the information on the shake in the optical axis direction, It does not shift to the shooting operation (does not allow imaging). Thereafter, when it is determined that the focus lens 102 is in the in-focus range, the process proceeds to step # 110, and the imaging control unit 206 permits imaging by the imaging unit 111. Therefore, a known shooting operation by the imaging unit 207 or the like is performed.

  FIG. 4 is a timing chart showing a series of operations including the reset operation described above. The reset operation will be described using a shake waveform in the direction of the optical axis. 4A to 4E, the horizontal axis represents elapsed time. In addition, the vertical axis in FIG. 4A indicates the amount of shake in the optical axis direction.

  4A shows an actual optical axis direction shake waveform 31 of the focus lens 102 and an optical axis direction shake which is a second order integration value obtained by second order integration of the output of the acceleration sensor 106 by the acceleration calculation unit 107. FIG. A waveform 32 is shown. 4B shows the photoelectric conversion and accumulation operation 33 of the AF sensor 203 and the imaging state determination timing 34 by the lens drive amount calculation unit 204, and FIG. 4C shows the drive waveform of the lens drive unit 103. 35 are shown respectively. Further, FIG. 4D shows the on / off states of the switches S1 and S2 when the release button 205 is pressed, and FIG. 4E shows the photographing availability determination 37 by the imaging control unit 206, respectively.

  Since the second-order integral value obtained by the acceleration calculation unit 107 is unstable in a low frequency region, there is a problem that the output drifts after the focus lens 102 is driven and before focusing is confirmed. However, when the in-focus state is confirmed, the second-order integral value by the acceleration calculation unit 107 at that time is set to zero (zero displacement in the optical axis direction), thereby correcting the drift of the second-order integral value until then. can do.

  Here, the calculation of the optical axis direction shake waveform 32, which is the second-order integration result by the acceleration calculation unit 107, is started, for example, when the switch S1 is turned on by pressing the release button 205 up to the first stage. Then, accumulation is performed by the AF sensor 203, and a lens drive amount is obtained by the lens drive amount calculation unit 204 based on the accumulation result, and the focus lens 102 is driven. Thereafter, accumulation is performed again by the AF sensor 203, and focusing determination is performed by a camera microcomputer (not shown) based on the result. Then, the deviation component value D due to drift is reduced so that the second-order integral value at the timing B, which is the average time of the accumulation time of the AF sensor 203, is near zero with respect to the timing A when the in-focus is confirmed. It is said that this is reset. This is because the timing at which the focus determination is performed in the lens driving amount calculation unit 204 corrects the delay time that the AF sensor 203 has with respect to the timing at which photoelectric conversion is performed.

  Thereafter, when the switch S2 is turned on by pressing the release button 203 up to the second stage, when the second-order integral value in the acceleration calculation unit 107 becomes close to zero (within the focusing range), the imaging control unit 206 Shooting is permitted and shooting is possible. On the other hand, shooting is not permitted when the second-order integral value in the acceleration calculation unit 107 is a value other than near zero (within the focusing range). Here, the expression “near zero” means that the actual focus range changes depending on the shooting conditions (focal length and aperture) at that time. For example, when the aperture is reduced, the second floor of the acceleration calculation unit 107 is slightly increased. This is because even if the integrated value deviates from zero, it is determined whether to allow photographing.

  In this way, the lens driving amount calculation unit 204 is configured to operate in a form complemented by the acceleration calculation unit 107. Therefore, as shown in FIG. 4, even after a time shorter than the sampling rate Taf for detecting the position of the focus lens 102, it is possible to continuously perform in-focus / in-focus determination. In addition, since it is not permitted to shoot at the time of out-of-focus, it is possible to reduce the occurrence of out-of-focus pictures.

  5 to 7 are diagrams for explaining an imaging apparatus according to the second embodiment of the present invention. Specifically, FIG. 5 is a block diagram showing a circuit configuration of a main part of the imaging apparatus, FIG. 6 is a flowchart showing the operation, and FIG. 7 is a timing chart for explaining the operation. 4 to 6 correspond to FIGS. 2 to 4 according to the first embodiment, and corresponding portions are denoted by the same reference numerals and step numbers, and description thereof is omitted.

  In FIG. 5, reference numeral 208 denotes a selection panel provided in the camera body 201, which allows the user to select a method for processing continuously shot images in the continuous shooting mode from the following four modes.

  When the user selects the first selection mode (MODE 1), the continuous image captured by the imaging unit 207 according to an instruction from the imaging control unit 206 is stored (stored) in the storage unit 210 by the image processing unit 209. The

  When the second selection mode (MODE 2) is selected by the user, a continuously shot image acquired by the imaging unit 207 according to an instruction from the imaging control unit 206 is displayed on the display unit (not shown) so that the user can check all the images. . Then, only the image selected by the user is stored in the storage unit 210.

  When the user selects the third selection mode (MODE 3), only the in-focus photograph acquired by the image capturing unit 207 according to an instruction from the image capturing control unit 206 is selected by the image processing unit 209 and stored in the storage unit 210. Saved. The in-focus photograph selection method performed by the image processing unit 209 is, for example, a method of selecting the one having the highest contrast value at the frame position selected as the focus detection area by the AF sensor 203 and the lens driving amount calculation unit 204.

  When the user selects the fourth selection mode (MODE 4), the continuously shot images acquired by the imaging unit 207 in response to an instruction from the imaging control unit 206 are subjected to image synthesis processing by the image processing unit 209 and processed as one image. It is stored in the storage unit 210. The image composition process performed by the image processing unit 209 is a process of creating an image having a deep depth of field in a pseudo manner by superimposing focused portions of the images, for example.

  Next, operations of main parts will be described with reference to the flowchart of FIG. In FIG. 6, step # 101 to step # 109 are the same as those in FIG. 3, so step # 201 and subsequent steps will be described.

  If it is determined in step # 109 in FIG. 6 that the focus lens 102 is in the in-focus range, the process proceeds to step # 201. Here, the imaging control unit 206 determines whether the mode selected by the selection panel 208 by the user is MODE1. Determine whether or not. As a result of the determination, if it is MODE1, the process proceeds to step # 202, and the image capturing unit 207 is permitted to capture an image by MODE1.

  If it is determined in step # 201 that the mode is not MODE1, the process proceeds to step # 203, and the imaging control unit 206 determines whether the mode selected by the selection panel 208 by the user is MODE2. As a result of the determination, if it is MODE2, the process proceeds to step # 204, and the imaging unit 207 is permitted to take an image by MODE2.

  If it is determined in step # 203 that the mode is not MODE2, the process proceeds to step # 205, and the imaging control unit 206 determines whether or not the mode selected by the selection panel 208 by the user is MODE3. As a result of the determination, if it is MODE3, the process proceeds to step # 206, and the imaging unit 207 is permitted to take an image by MODE3.

  If it is determined in step # 205 that the mode is not MODE3, the process proceeds to step # 207, and the imaging control unit 206 permits the imaging unit 207 to perform imaging using MODE4.

  FIG. 7 is a timing chart showing the series of operations described above. The difference from FIG. 4 is that continuous shooting is performed after the determination of whether or not shooting is possible in FIG.

  In this way, the lens driving amount calculation unit 204 is configured to operate in a form complemented by the acceleration calculation unit 107. Therefore, as shown in FIG. 7, even after a time shorter than the sampling rate Taf for detecting the position of the focus lens 102, it is possible to continuously perform in-focus / in-focus determination. In addition, since it is not permitted to shoot at the time of out-of-focus, it is possible to reduce the occurrence of out-of-focus pictures. Furthermore, since continuous shooting is performed within the in-focus range, the probability of acquiring a focused photo is improved.

  8 to 10 are diagrams for explaining an image pickup apparatus according to Embodiment 3 of the present invention. Specifically, FIG. 8 is a block diagram showing a circuit configuration of a main part of the imaging apparatus, FIG. 9 is a flowchart showing the operation, and FIG. 10 is a timing chart for explaining the operation. 8 to 10 correspond to FIGS. 2 to 4 related to the first embodiment and FIGS. 5 to 7 related to the second embodiment, and the corresponding parts have the same reference numerals and step numbers. The description is omitted.

  In FIG. 8, 211 is a speaker device which is a voice notification means, and 212 is a display section which is a display means. In this case, when the imaging control unit 206 determines that the focus lens 102 is in the focus range, the user is notified (notified) that the subject is located in the focus range. In the selection panel 208 in the third embodiment, various notification methods can be selected.

  On the selection panel 208, the first notification method (notification MODE1) is selected by the user, and when the release button 205 is pressed, the accumulation operation instruction of the AF sensor 203 is given by turning on the switch S1, and then the photographing start instruction is given by turning on the switch S2. Suppose that was made. Then, during the period from the accumulation operation instruction to the imaging start instruction, when the focus lens 102 is located in the in-focus range based on the optical axis direction shake information obtained by the acceleration calculation unit 107, the speaker device 211 is used. The user is notified by voice using.

  In addition, it is assumed that the second notification method (notification MODE 2) is selected by the user on the selection panel 208. Assume that the release button 205 is pressed to instruct the accumulation operation of the AF sensor 203 when the switch S1 is turned on, and then the photographing start instruction is made when the switch S2 is turned on. Then, during the period from the accumulation operation instruction to the photographing start instruction, when the focus lens 102 is in the in-focus range based on the optical axis direction shake information obtained by the acceleration calculation unit 107, This is visually notified to the user using the display unit 212.

  In addition, it is assumed that the third notification method (notification MODE 3) is selected by the user on the selection panel 208. Assume that the release button 205 is pressed to instruct the accumulation operation of the AF sensor 203 when the switch S1 is turned on, and then the photographing start instruction is made when the switch S2 is turned on. Then, during the period from the accumulation operation instruction to the imaging start instruction, when the focus lens 102 is located in the in-focus range based on the optical axis direction shake information obtained by the acceleration calculation unit 107, the speaker device 211 is used. And the user is notified using the display unit 212.

  Next, operations of main parts will be described with reference to the flowchart of FIG. In FIG. 6, step # 101 to step # 109 are the same as in FIG. 3, so step # 301 and subsequent steps will be described.

  If it is determined in step # 109 in FIG. 9 that the focus lens 102 is in the in-focus range, the process proceeds to step # 301. Here, the imaging control unit 206 is in the notification MODE1 as the mode selected by the selection panel 208 by the user. It is determined whether or not. As a result of the determination, if it is the notification MODE1, the process proceeds to Step # 302, where notification by the notification MODE1 is performed.

  If it is determined in step # 301 that it is not notification MODE1, the process proceeds to step # 303, and the imaging control unit 206 determines whether or not the mode selected by the selection panel 208 by the user is notification MODE2. . As a result of the determination, if it is the notification MODE2, the process proceeds to Step # 304, and notification by the notification MODE2 is performed.

  On the other hand, if it is determined in step # 303 that it is not the notification MODE 2, the process proceeds to step # 305. In step # 305, notification by notification MODE3 is performed.

  FIG. 10 is a timing chart showing the series of operations described above, and the difference from FIG. 4 is that it is determined whether or not photography is possible, instead of making a photography permission decision at the time of focusing and not allowing photography. .

  In this way, the lens driving amount calculation unit 204 is configured to operate in a form complemented by the acceleration calculation unit 107. Therefore, as shown in FIG. 10, even after a time shorter than the sampling rate Taf for detecting the position of the focus lens 102, it is possible to continuously perform in-focus / in-focus determination. In addition, since it is not permitted to shoot at the time of out-of-focus, it is possible to reduce the occurrence of out-of-focus pictures. Furthermore, since it is informed that shooting is possible within the in-focus range, it is possible to reduce the occurrence of out-of-focus pictures.

(Correspondence between Invention and Example)
The imaging unit 207 corresponds to the imaging unit of the present invention, and the focus lens 102 corresponds to the imaging optical system that forms the subject image on the imaging unit of the present invention. The AF sensor 203 and the lens driving amount calculation unit 204 correspond to a focus detection unit that detects the focus state of the imaging optical system according to the present invention. Further, the acceleration sensor 106 and the acceleration calculation unit 107 correspond to the optical axis direction shake calculation unit that calculates the optical axis direction shake due to the acceleration acting on the imaging optical system of the present invention. In addition, when the imaging control unit 206 detects an in-focus state by the focus detection unit of the present invention, the imaging control unit 206 determines that the optical axis direction shake amount calculated by the shake calculation unit is within the focus range. Equivalent to. Further, the speaker device 211 and the display unit 212 correspond to the notification unit of the present invention.

DESCRIPTION OF SYMBOLS 102 Focus lens 106 Acceleration sensor 107 Acceleration calculating part 203 AF sensor 204 Lens drive amount calculating part 206 Imaging control part 207 Imaging part 210 Storage part 211 Speaker apparatus 212 Display part

Claims (4)

An imaging optical system for forming a subject image on the imaging means;
A focus detection means for detecting a focus state of the imaging optical system;
An image pickup apparatus having an optical axis direction shake calculating means for calculating an optical axis direction shake due to acceleration acting on the imaging optical system,
When the focus detection unit detects an in-focus state, imaging is possible when the optical axis direction shake amount calculated by the optical axis direction shake calculation unit is within a focus range. apparatus. An imaging optical system for forming a subject image on the imaging means;
A focus detection means for detecting a focus state of the imaging optical system;
An image pickup apparatus having an optical axis direction shake calculating means for calculating an optical axis direction shake due to acceleration acting on the imaging optical system,
When an in-focus state is detected by the focus detection unit, continuous shooting is possible when the optical axis direction shake amount calculated by the optical axis direction shake calculation unit is within a focus range. Imaging device.   The imaging apparatus according to claim 2, further comprising a storage unit that stores an image corresponding to a user's selection among the continuously photographed images. An imaging optical system for forming a subject image on the imaging means;
A focus detection means for detecting a focus state of the imaging optical system;
Optical axis direction shake calculating means for calculating optical axis direction shake due to acceleration acting on the imaging optical system;
Informing means for informing when the in-focus state is detected by the in-focus detecting means when the in-focus amount calculated by the in-axis direction shake calculating means is within the in-focus range. An imaging device.

Images