Patent Publication Number: US-11022860-B2

Title: Imaging apparatus, method for controlling imaging apparatus, and processing apparatus

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a U.S. National Phase of International Patent Application No. PCT/JP2018/015802 filed on Apr. 17, 2018, which claims priority benefit of Japanese Patent Application No. JP 2017-081529 filed in the Japan Patent Office on Apr. 17, 2017. Each of the above-referenced applications is hereby incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present technology relates to an imaging apparatus, a method for controlling the imaging apparatus, and a processing apparatus, and more particularly, to an imaging apparatus and the like that adjust main light emission on the basis of a result of pre-light emission. 
     BACKGROUND ART 
     For example, a flash photographing apparatus is described in PTL 1. The flash photographing apparatus controls the amount of main light emission with photometric values using pre-light emission and distance information received from a distance measurement section. 
     CITATION LIST 
     Patent Literature 
     
         
         [PTL 1] 
       
    
     Japanese Patent Laid-Open No. 2004-258431 
     SUMMARY 
     Technical Problem 
     Conventionally, so-called bounce photographing has been known. In the bounce photographing, flash light does not directly strike a subject. Instead, photographing is performed by emitting flash light toward a ceiling, a wall surface, or the like such that the light reflected off the ceiling, the wall surface, or the like strikes the subject. In this case, the optical path is longer than the distance indicated by distance information. 
     Conventionally, therefore, when bounce photographing is performed, the amount of main light emission is controlled on the basis of the estimated subject distance using the pre-light emission without using the distance information. However, the estimated subject distance using the pre-light emission is significantly influenced by the level of the reflectance of the subject. For example, in a case where the reflectance of the subject is extremely high, the result is sometimes such that the estimated subject distance using the pre-light emission becomes smaller than the distance indicated by the distance information received from the distance measurement section even at the time of bounce photographing. In a case where the amount of main light emission is controlled only by the estimated subject distance using the pre-light emission, the underexposure may occur. 
     It is an object of the present technology to increase the accuracy of adjusting the main light emission. 
     Solution to Problem 
     A concept of the present technology lies in an imaging apparatus (processing apparatus) including a control section configured to adjust, in a case of bounce light emission, an amount of main light emission on the basis of an estimated pre-light-emitted subject distance or information corresponding to the estimated pre-light-emitted subject distance and an estimated lens-focused subject distance, the estimated pre-light-emitted subject distance and the information corresponding to the estimated pre-light-emitted subject distance being obtained by pre-light-emission processing, the estimated lens-focused subject distance being obtained from focus information through a lens. 
     In the present technology, an estimated pre-light-emitted subject distance or information corresponding to the estimated pre-light-emitted subject distance is obtained by pre-light-emission processing. An estimated lens-focused subject distance is obtained from focus information through a lens. Further, an amount of main light emission is adjusted on the basis of the estimated pre-light-emitted subject distance or the information corresponding to the estimated pre-light-emitted subject distance and the estimated lens-focused subject distance. 
     For example, near-side lens error information may be reflected in the estimated lens-focused subject distance. In addition, for example, in a case where the estimated pre-light-emitted subject distance is greater than the estimated lens-focused subject distance, the control section may adjust the amount of main light emission for the case of the bounce light emission without using the estimated lens-focused subject distance. In addition, for example, the control section may obtain an estimated subject distance for adjusting the main light emission on the basis of the estimated pre-light-emitted subject distance or the information corresponding to the estimated light-emitted subject distance and the estimated lens-focused subject distance and adjust the amount of main light emission on the basis of the estimated subject distance for adjusting light. 
     For example, in a case where the estimated pre-light-emitted subject distance is smaller than the estimated lens-focused subject distance, the control section may set, as the final estimated subject distance, a distance made closer to the estimated lens-focused subject distance from the estimated pre-light-emitted subject distance by a predetermined amount. In this case, for example, the control section may set the estimated lens-focused subject distance as the estimated subject distance for adjusting the main light emission. In addition, in this case, for example, in a case where the estimated pre-light-emitted subject distance is smaller than the estimated lens-focused subject distance by a certain amount or greater, the control section may set, as the estimated subject distance for adjusting the main light emission, a distance increased from the estimated pre-light-emitted subject distance by up to the certain amount. 
     For example, the control section may acquire, from a lens apparatus, information regarding the estimated lens-focused subject distance in which the near-side lens error information is reflected. In addition, for example, the control section may acquire the near-side lens error information from a lens apparatus and obtain information regarding the estimated lens-focused subject distance in which the near-side lens error information is reflected. 
     In addition, for example, a holding section configured to hold the near-side lens error information may be further included. The control section may acquire the near-side lens error information from the holding section and obtain information regarding the estimated lens-focused subject distance in which the near-side lens error information is reflected. In this case, for example, a communication section configured to acquire the near-side lens error information from an external server and hold the near-side lens error information in the holding section may be further included. In addition, in this case, for example, a user operation section configured to input the near-side lens error information and hold the near-side lens error information in the holding section may be further included. 
     In the present technology, as described above, in the case of the bounce light emission, the amount of main light emission is adjusted on the basis of the estimated pre-light-emitted subject distance or the information corresponding to the estimated pre-light-emitted subject distance and the estimated lens-focused subject distance. Therefore, it is possible to increase the accuracy of adjusting the main light emission when the bounce light emission is performed. 
     It is noted that in the present technology, for example, in a state where a light-emitting section is fixed to a housing of the imaging apparatus, the control section may adjust, in the case of the bounce light emission, the amount of main light emission on the basis of the estimated pre-light-emitted subject distance and the estimated lens-focused subject distance. With this configuration, in a case where the optical path is shorter than the estimated lens-focused subject distance generated on the basis of the focus information, it is possible to prevent a decrease in the accuracy of adjusting the main light emission due to the use of the estimated lens-focused subject distance. 
     In addition, in the present technology, for example, the control section may correct the estimated pre-light-emitted subject distance on the basis of information regarding an orientation of a light-emitting section. With this configuration, it is possible to obtain the estimated pre-light-emitted subject distance more appropriately and further increase the accuracy of adjusting the main light emission for the case of bouncing. 
     In this case, for example, the control section may obtain a correction amount of the estimated pre-light-emitted subject distance on the basis of a light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. Further, in this case, for example, the control section may acquire, from the light-emitting section, information regarding the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. In addition, in this case, for example, a holding section configured to hold the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section may be further included. The control section may acquire, from the holding section, information regarding the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. 
     In addition, another concept of the present technology includes a control section configured to control: processing of obtaining an estimated pre-light-emitted subject distance obtained by pre-light-emission processing; processing of obtaining an estimated near-side subject distance in which near-side lens error information is reflected and an estimated near-side subject distance in which far-side lens error information is reflected, the estimated near-side subject distances being obtained from focus information through a lens; processing of correcting the estimated pre-light-emitted subject distance on the basis of information regarding an orientation of a light-emitting section; and processing of adjusting an amount of main light emission on the basis of the estimated pre-light-emitted subject distance corrected, the estimated near-side subject distance, and an estimated far-side subject distance. 
     In the present technology, an estimated pre-light-emitted subject distance is obtained by pre-light-emission processing. An estimated near-side subject distance in which near-side lens error information is reflected and an estimated near-side subject distance in which far-side lens error information is reflected are obtained from focus information through a lens. The estimated pre-light-emitted subject distance is corrected on the basis of information regarding an orientation of a light-emitting section. Further, an amount of main light emission is adjusted on the basis of the estimated pre-light-emitted subject distance corrected, the estimated near-side subject distance, and an estimated far-side subject distance. 
     For example, the control section may obtain a correction amount of the estimated pre-light-emitted subject distance on the basis of a light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. In this case, for example, the control section may acquire, from the light-emitting section, information regarding the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. In addition, in this case, for example, a holding section configured to hold the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section may be further included. The control section may acquire, from the holding section, information regarding the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. 
     In the present technology, as described above, the estimated pre-light-emitted subject distance is corrected and used according to the information regarding the orientation of the light-emitting section. It is possible to obtain the estimated pre-light-emitted subject distance more appropriately and increase the accuracy of adjusting the main light emission. 
     Advantageous Effect of Invention 
     According to the present technology, it is possible to increase the accuracy of adjusting the main light emission. It is noted that the effects described in the present specification are merely examples and are not limitative. In addition, additional effects may be exhibited. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a block diagram illustrating an example of a configuration of an imaging system as an embodiment. 
         FIGS. 2A and 2B  depict diagrams illustrating states of direct irradiation and bounce irradiation. 
         FIG. 3  is a flowchart (1/2) illustrating an example of control processing at the time of photographing. 
         FIG. 4  is a flowchart (2/2) illustrating the example of the control processing at the time of the photographing. 
         FIG. 5  is a flowchart illustrating an example of control processing of light-emission photographing. 
         FIG. 6  is a flowchart illustrating an example of control processing of a pre-light-adjustment sequence. 
         FIGS. 7A, 7B, and 7C  depict diagrams for describing a configuration and operation of a photometry section. 
         FIGS. 8A, 8B, 8C, 8D, 8E, 8F, 8G, 8H, and 8I  depict diagrams for describing the configuration and operation of the photometry section. 
         FIG. 9  is a flowchart illustrating an example of control processing of calculation of the amount of main light emission. 
         FIG. 10  is a diagram illustrating an example of a correspondence relationship between an actual subject distance [m] and distance information output from a lens apparatus. 
         FIG. 11  is a diagram illustrating an example of a correspondence relationship between an actual subject distance [DV] and a difference between the distance information output from a lens apparatus  200  and an actual distance. 
         FIG. 12  is a diagram for describing correction when a final estimated subject distance dv_final is obtained. 
         FIG. 13  is a diagram for describing correction when the final estimated subject distance dv_final is obtained. 
         FIG. 14  is a diagram for describing correction when the final estimated subject distance dv_final is obtained. 
         FIG. 15  is a diagram for describing correction when the final estimated subject distance dv_final is obtained. 
         FIG. 16  is a flowchart illustrating another example of control processing of calculation of the amount of main light emission. 
         FIG. 17  is a flowchart illustrating an example of control processing of a main-light-emission photographing sequence. 
         FIG. 18  is a flowchart illustrating an example of control processing of acquisition of a state of an external flash in a case where the amount of main light emission is controlled according to the bounce accuracy. 
         FIG. 19  is a diagram illustrating a relationship between an optical axis of the external flash and the vertical accuracy (elevation angle) θf from the optical axis. 
         FIG. 20  is a diagram illustrating a light-emission-amount attenuation rate for each of the angular directions in the light distribution angles of 0 to 90 degrees in the vertical direction according to respective flash zoom positions. 
         FIG. 21  is a diagram illustrating a relationship among the optical axis of the external flash, the vertical accuracy (elevation angle) θf from the optical axis thereof, and the bounce angle θb. 
         FIG. 22  is a diagram illustrating an example of a relationship between the vertical angle° from the optical axis of a light-emitting section and the light-emission attenuation rate. 
         FIG. 23  is a diagram illustrating an example of a relationship between the vertical angle° from the optical axis of the light-emitting section and the light-distribution-angle correction amount (EV). 
         FIG. 24  is a flowchart illustrating an example of control processing of calculation of the amount of main light emission. 
         FIG. 25  is a diagram illustrating an example of combinations for switching a main-light-emission control type according to a relationship between respective flash zoom positions and flash bounce angles. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, a mode for carrying out the invention (hereinafter referred to as “embodiment”) will be described. It is noted that the description will be made in the following order. 
     1. Embodiment 
     2. Modification 
     1. Embodiment 
     [Example of Configuration of Imaging System] 
       FIG. 1  illustrates an example of a configuration of an imaging system  10  as the embodiment. The imaging system  10  includes an imaging apparatus  100  and an interchangeable lens  200 . The imaging system  10  is implemented by, for example, a digital still camera (for example, a digital single-lens camera) whose lens is replaceable. 
     The imaging apparatus  100  is an imaging apparatus that captures an image of a subject to generate image data (a captured image) and record the generated image data as image content (still image content or moving image content). In addition, the interchangeable lens  200  can be mounted on the imaging apparatus  100  through a lens mount (not illustrated). 
     The interchangeable lens  200  is an interchangeable lens unit that can be mounted on the imaging apparatus  100  through the lens mount (not illustrated). The interchangeable lens  200  includes a lens section  211 , an aperture  212 , an interchangeable-lens control section  220 , and a communication section  221 . 
     The imaging apparatus  100  includes a bus  101 , a shutter  111 , a shutter control section  112 , an imaging element  113 , an imaging control section  114 , an operation section  121 , an operation control section  122 , a display section  131 , and a display control section  132 . In addition, the imaging apparatus  100  includes a memory  141 , a memory control section  142 , a ROM (Read Only Memory)  151 , and a RAM (Random Access Memory)  152 . 
     In addition, the imaging apparatus  100  includes a CPU (Central Processing Unit)  153  and a communication interface  154 . In addition, the imaging apparatus  100  includes a communication section  161 , a photometry section  162 , a distance measurement section  163 , an external flash  171 , a light-emission control section  172 , and a connection section  173 . It is noted that the bus  101  is a system bus. The respective sections included in the imaging apparatus  100  are connected so to be communicable with each other through the bus  101 . 
     The lens section  211  is a group of lenses that collect light incident from the subject. The light collected by the group of lenses is incident on the imaging element  113 . It is noted that the lens section  211  includes a focus lens for focusing, a zoom lens for enlarging the subject, and the like. In addition, each lens included in the lens section  211  is controlled by the interchangeable-lens control section  220  such that a zoom function, a focus function, and the like are realized. 
     The communication section  221  communicates with the communication section  161  of the imaging apparatus  100 . The communication section  221  receives request information from the imaging apparatus  100  and transmits the request information to the interchangeable-lens control section  220 . The interchangeable-lens control section  220  controls the lens section  211  and the aperture  212  on the basis of a drive request included in the request information. In addition, state information indicating the position of each lens of the lens section  211  and the state of the aperture  212  transmitted from the communication section  221  and the interchangeable-lens control section  220  is transmitted to the imaging apparatus  100 . 
     The aperture  212  adjusts the amount of incident light that passes through the lens section  211 . The light that has been adjusted by the aperture  212  is incident on the imaging element  113 . In addition, the aperture  212  is controlled by the interchangeable-lens control section  220 . 
     The shutter  111  physically blocks light to be incident on the imaging element  113  on the basis of the control by the shutter control section  112 . That is, the shutter  111  adjusts the amount of light by passing or blocking light to be incident on the imaging element  113 . It is noted that although an example described herein uses the shutter that physically blocks light to be incident on the imaging element  113 , an electronic shutter that can realize the function equivalent to this shutter may be used. The shutter control section  112  controls the shutter  111  on the basis of the control by the CPU  153 . 
     On the basis of the control by the imaging control section  114 , the imaging element  113  converts, for each pixel, an optical image (subject image) of the subject, which has been formed on a light receiving surface by light incident through the lens section  211  and the aperture  212 , into electrical signals and outputs image signals (image data) for one screen. The image signals output from the imaging element  113  are subjected to various types of image processing through the bus  101 . 
     In addition, the image signals output from the imaging element  113  are used to perform various types of computational processing. Examples of the computational processing to be performed include AF (Auto Focus) computational processing, AE (Automatic Exposure) computational processing, and AWB (Auto White Balance) computational processing. 
     It is noted that as long as all or part of the image data accumulated in the imaging element can be read on the basis of the control by the imaging control section  114 , various types of configurations can be used as accumulation and reading configurations for the imaging element. In addition, a CCD (Charge Coupled Device) sensor, a CMOS (Complementary Metal Oxide Semiconductor) sensor, or the like can be used as the imaging element  113 , for example. 
     The imaging control section  114  controls imaging processing and output processing of the imaging element  113  on the basis of the control by the CPU  153 . Specifically, the imaging control section  114  generates timing signals for performing imaging control (for example, drive timing signals necessary when the imaging element  113  accumulates and reads image signals for each screen) and supplies the generated timing signals to the imaging element  113 . When various types of timing signals are supplied to the imaging element  113 , the imaging element  113  uses the timing signals as timing signals for the imaging processing and the processing of outputting the image signals. 
     The operation section  121  includes operation members such as buttons for performing various types of operations and receives an operation input from a user. On the basis of the control by the CPU  153 , the operation control section  122  performs control related to the operation input received by the operation section  121 . 
     The content of the operation input received by the operation section  121  is transmitted to the CPU  153  through the operation control section  122 . The operation section  121  is an interface for reflecting a request from the user in the imaging apparatus  100 . It is noted that in addition to the operation members such as the buttons arranged on the outer surface of the imaging apparatus  100 , a touch panel may be provided on the display section  131  to receive an operation input from the user on the touch panel. 
     The display section  131  displays images corresponding to various types of image data supplied from the display control section  132 . The display control section  132  causes the display section  131  to display various types of image data on the basis of the control by the CPU  153 . In addition, the display section  131  provides, together with an image to be displayed, information and the like associated with the image. For example, the display section  131  sequentially displays the image data (captured image) output from the imaging element  113  and subjected to various types of image processing. 
     In addition, the display section  131  displays an image corresponding to an image file stored in the memory  141 , for example. It is noted that a display panel such as an organic EL (Electro Luminescence) panel or an LCD (Liquid Crystal Display) can be used as the display section  131 , for example. In addition, a touch panel may be used, for example. On the touch panel, the user can perform an operation input by touching or approaching the user&#39;s finger on the display surface. 
     The memory  141  is a non-volatile storage apparatus that records image data and the like on the basis of the control by the memory control section  142 . The memory control section  142  performs memory control such as reading of data from the memory  141  and writing of data to the memory  141  on the basis of the control by the CPU  170 . 
     The image data output from the imaging element  113  and subjected to various types of image processing are recorded on the memory  141  as an image file (a still image file or a moving image file). It is noted that the memory  141  may be detachable from the imaging apparatus  100  or may be fixed or built in the imaging apparatus  100 . In addition, another storage medium such as a semiconductor memory, a magnetic disk, an optical disc, or the like can be used as the memory  141 , for example. 
     The ROM  151  is a non-volatile memory that stores a program to be executed by the CPU  153 , software, data, and the like. The RAM  152  is a volatile memory that holds data that should be temporarily held and data that are rewritable when the CPU  153  operates. 
     The CPU  153  controls each section of the imaging apparatus  100  on the basis of the program, software, and the like stored in the ROM  151 . That is, the CPU  153  executes the program, software, and the like to collectively control components that are communicable through the bus  101 . 
     The communication interface (communication I/F)  154  transmits or receives information by communicating with an external device, for example, a personal computer connected through a digital interface or an external server connected through a network. For example, the communication interface  154  can transmit an image file recorded on the memory  141  to the server on the network for storage. In addition, for example, the communication interface  154  can access the server on the network to acquire an update program or other information necessary for the CPU  153  to control the imaging apparatus  100 . 
     The photometry section  162  receives part of the light incident through the lens section  211  and the aperture  212 . The photometry section  162  generates a photometric signal related to the luminosity on the subject side, that is, the subject brightness, and transmits the photometric signal to the CPU  152 . For example, the photometry section  162  includes a photometric sensor whose light receiving section is divided into a plurality of photometric areas. An optical image for the subject is divided into the plurality of photometric areas, and photometric values are individually obtained in the respective photometric areas. 
     The distance measurement section  163  computes an estimated subject distance on the basis of focus lens position information (focus information) transmitted from the interchangeable lens  200  by communication, and transmits the estimated subject distance to the CPU  151 . The estimated subject distance indicates the distance from the imaging apparatus  100  to the subject. It is noted that in a case where information regarding the above-described estimated subject distance is transmitted from the interchangeable lens  200  by communication, the computation of the estimated subject distance in the distance measurement section  163  is not necessary. It is noted that in addition to the configuration for obtaining the subject distance by computation on the basis of the focus lens position information (focus information), it is also conceivable that the distance measurement section  163  has a configuration for obtaining the subject distance information using an ultrasonic wave, a laser, or the like. 
     The external flash  171  is included in an external light-emitting section. For example, the external flash  171  is mounted using the connection section  173  provided on an upper portion of a housing of the imaging apparatus  100  and is provided so as to irradiate the subject with flash light. The external flash  171  is discharge equipment such as, for example, a xenon lamp and can emit strong light only for a moment to irradiate the subject with a strong flash of light. It is noted that a built-in flash is omitted in the example in the figure. 
     The external flash  171  can change the irradiation direction and selectively perform direct or bounce irradiation as irradiation of an imaging target.  FIG. 2A  illustrates a state of direct irradiation (direct light emission) where the bounce angle θb is 0 degree.  FIG. 2B  illustrates a state of bounce irradiation (bounce light emission) where the bounce angle θb is not 0 degree. 
     The light-emission control section  172  controls the amount of light emission and the light emission timing of the external flash  171  on the basis of the control by the CPU  153 . In this embodiment, pre-light emission (preliminary light emission) is performed prior to main light emission for imaging the subject. On the basis of this result, the amount of main light emission is appropriately adjusted. 
     Flowcharts in  FIGS. 3 and 4  illustrate an example of control processing in the CPU  153  at the time of photographing. First, the CPU  153  starts the control processing when power is on in step ST 1 . Next, the CPU  153  performs power-on processing and initial settings in step ST 2 . 
     Next, the CPU  153  acquires operation information in step ST 3 . In this case, the CPU  153  acquires the operation information such as an exposure mode, an exposure correction value, a preview, and AF/MF switching. Next, the CPU  153  acquires lens information such as an aperture and a focal length in step ST 4 . 
     Next, in step ST 5 , the CPU  153  determines whether or not the external flash  171  has been mounted. In a case where the external flash  171  has been mounted, the CPU  153  acquires a state of the external flash  171  in step ST 6 . The state of the external flash  171  includes information such as on/off of light emission and bouncing. 
     Next, in step ST 7 , the CPU  153  determines whether or not the external flash  171  is in a bounce state. The CPU  153  determines whether or not the external flash  171  is in the bounce state on the basis of bounce information acquired from the external flash  171  in step ST 6 . It is noted that the CPU  153  may perform processing of determining whether or not the external flash  171  faces the subject and in a case where the CPU  153  has determined that the external flash  171  does not face the subject as a result of the processing, the CPU  153  may determine that the external flash  171  is in the bounce state. In a case where the external flash  171  is in the bounce state, the CPU  153  sets a bounce flag in step ST 8 . After the processing in step ST 8 , the CPU  153  proceeds to processing in step ST 9 . It is noted that in a case where the external flash  171  has not been mounted in step ST 5  or the external flash  171  is not in the bounce state in step ST 7 , the CPU  153  immediately proceeds to processing in step ST 9 . 
     In step ST 9 , the CPU  153  displays a live view on the display section  131  while computing photographing exposure control values. Next, in step ST 10 , the CPU  153  determines whether or not to emit light. For example, the CPU  153  determines not to emit light in a case where non-light emission has been set. In addition, for example, in a case where automatic light emission has been set and the subject brightness is sufficient according to the photometric signal, the CPU  153  determines not to emit light. 
     In a case where the CPU  153  has determined to emit light, the CPU  153  sets a light-emission flag in step ST 11 , and then proceeds to processing in step ST 12 . On the other hand, in a case where the CPU  153  has determined not to emit light, the CPU  153  immediately proceeds to processing in step ST 12  without setting the light-emission flag. 
     In step ST 12 , the CPU  153  displays a live view while setting and controlling photographing gain. Next, the CPU  153  sets and controls the shutter speed (SS) in step ST 13 . Further, the CPU  153  sets and controls an aperture value in step ST 14 . 
     Next, in step ST 15 , the CPU  153  determines whether S 1  is on, that is, whether or not a shutter button has been half-pressed. In a case where S 1  is not on, the CPU  153  returns to the processing in step ST 3 . On the other hand, in a case where S 1  is on, the CPU  153  performs auto-focus control in step ST 16 . 
     Next, the CPU  153  acquires auto-focus information in step ST 17 . The auto-focus information includes, for example, information regarding the estimated subject distance generated on the basis of in-focus/out-of-focus and the focus information. For example, the information regarding the estimated subject distance is supplied directly to the imaging apparatus  200  from the lens apparatus  200  or calculated by the distance measurement section  163  on the basis of the focus information supplied from the lens apparatus  200  to the imaging apparatus  100 . 
     In addition, for example, in a case where the information regarding the estimated subject distance is supplied from the lens apparatus  200  to the imaging apparatus  100 , pieces of information regarding an estimated near-side subject distance and an estimated far-side subject distance or pieces of information regarding near-side and far-side errors are also supplied at the same time. The estimated near-side subject distance includes a near-side error. The estimated far-side subject distance includes a far-side error. In a case where the pieces of information regarding the near-side and far-side errors are supplied, the pieces of information regarding the estimated near-side subject distance including the near-side error and the estimated far-side subject distance including the far-side error are computed and used on the basis of the pieces of information regarding the near-side and far-side errors and the information regarding estimated subject distance. 
     Next, in step ST 18 , the CPU  153  determines whether S 2  is on, that is, whether or not the shutter button has been deep-pressed. In a case where S 2  is not on, the CPU  153  returns to the processing in step ST 3 . On the other hand, in a case where S 2  is on, the CPU  153  proceeds to processing in step ST 19 . 
     In step ST 19 , the CPU  153  determines whether or not the light-emission flag has been set. In a case where the light-emission flag has been set, the CPU  153  performs light-emission photographing processing in step ST 20 , and then records image data on a medium in step ST 21 . On the other hand, in a case where the light-emission flag has not been set, the CPU  153  performs non-light-emission photographing processing in step ST 22 , and then records image data on the medium in step ST 21 . It is noted that in this embodiment, the medium is the memory  141  (see  FIG. 1 ). 
     Next, in step ST 23 , the CPU  153  determines whether or not a power-off operation has been performed. In a case where the power-off operation has not been performed, the CPU  153  returns to the processing in step ST 3 . On the other hand, in a case where the power-off operation has been performed, the CPU  153  performs power-off processing in step ST 24 , and then ends the control processing in step ST 25 . 
     A flowchart in  FIG. 5  illustrates an example of control processing of light-emission photographing in the CPU  153 . First, the CPU  153  starts the control processing in step ST 31 . Then, the CPU  153  executes control processing of a pre-light-adjustment sequence in step ST 32 , and executes control processing of calculation of the amount of main light emission in step ST 33 . In addition, the CPU  153  executes control processing of a main-light-emission photographing sequence in step ST 34 . Then, after the processing in step ST 34 , the CPU  153  ends the control processing in step ST 35 . 
     A flowchart in  FIG. 6  illustrates an example of the control processing of the pre-light-adjustment sequence in the CPU  153 . First, the CPU  153  starts the control processing in step ST 40 . After that, the CPU  153  sets pre-light-emission control values in step ST 41 . 
     In this case, the CPU  153  uses a flash appropriate guide number calculation formula represented by the following mathematical formula (1) to calculate the amount of pre-light emission from the ISO sensitivity, distance information, and aperture information, for example. 
     
       
         
           
             
               
                 
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                   1 
                   ) 
                 
               
             
           
         
       
     
     Next, the CPU  153  transmits the amount of pre-light emission from the light-emission control section  172  to the external flash  171  in step ST 42  and performs pre-light emission in step ST 43  to acquire photometric values from the photometry section  162  in step ST 44 . 
     As described above, the photometry section  162  includes the photometric sensor whose light receiving section is divided into the plurality of photometric areas. An optical image for the subject is divided into the plurality of photometric areas, and photometric values are individually obtained in the respective photometric areas. In a case where there is a plurality of photometric areas separated in a matrix of m×n, m×n photometric values lvl_pre_0 to lvl_pre (m*n−1) are obtained. Here, each of 0 to m*n−1 denotes a number of each of the photometric areas. For example,  FIG. 7A  illustrates an example in which the photometry section  162  includes 9×6=54 photometric areas that are each assigned an area number from 0 to 53. 
     Next, returning to  FIG. 6 , the CPU  153  acquires photometric values from the photometry section  162  in step ST 46  without performing pre-light emission in step ST 45 . In a case where there is a plurality of photometric areas separated in a matrix of m×n, m×n photometric values lvl_nonpre_0 to lvl_nonpre_(m*n−1) are obtained. 
     Next, in step  47 , the CPU  153  calculates a pre-light-adjustment evaluation value level_eva_pre by subtracting the photometric value at the time of non-light emission from the photometric value at the time of light emission for each photometric area and weighting and adding each resulting value. The following mathematical formula (2) represents a formula for calculating the pre-light-adjustment evaluation value level_eva_pre. A weighting coefficient for the k-th area is denoted by ak. 
     
       
         
           
             
               
                 
                   
                       
                   
                   ⁢ 
                   
                     [ 
                     
                       Math 
                       . 
                       
                           
                       
                       ⁢ 
                       2 
                     
                     ] 
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     level_eva 
                     ⁢ 
                     _pre 
                   
                   = 
                   
                     
                       ( 
                       
                         
                           
                             ∑ 
                             
                               
                                 m 
                                 * 
                                 n 
                               
                               - 
                               1 
                             
                           
                           
                             k 
                             = 
                             0 
                           
                         
                         ⁢ 
                         
                           ( 
                           
                             ak 
                             * 
                             
                               ( 
                               
                                 
                                   lvl_pre 
                                   ⁢ 
                                   _k 
                                 
                                 - 
                                 
                                   lvl_nonpre 
                                   ⁢ 
                                   _k 
                                 
                               
                               ) 
                             
                           
                           ) 
                         
                       
                       ) 
                     
                     ⁢ 
                     
                       / 
                     
                     ⁢ 
                     
                       ( 
                       
                         
                           
                             ∑ 
                             
                               
                                 m 
                                 * 
                                 n 
                               
                               - 
                               1 
                             
                           
                           
                             k 
                             = 
                             0 
                           
                         
                         ⁢ 
                         ak 
                       
                       ) 
                     
                   
                 
               
               
                 
                   ( 
                   2 
                   ) 
                 
               
             
           
         
       
     
       FIG. 7B  illustrates weighting coefficients a 0  to a 53  set in advance in a case where the photometry section  162  includes, as illustrated in  FIG. 7A , the 54 photometric areas denoted by the area numbers 0 to 53. The weighting coefficients a 0  to a 53  correspond to the respective photometric areas.  FIG. 7C  illustrates a specific example of the weighting coefficients a 0  to a 53 . 
     Next, in step ST 48 , the CPU  153  computes dv_main, which is an estimated subject distance using the pre-light emission. In this case, in a case where the amount of pre-light emission is assumed to be iv_pre, the aperture at the time of the pre-light emission is assumed to be av_pre, and the sensitivity (gain control) at the time of the pre-light emission is assumed to be sv_pre, a distance dv_pre (Apex), which is appropriate for the amount of pre-light emission, is obtained by the following mathematical formula (3).
 
 dv _pre= iv _pre− av _pre+ sv _pre   (3)
 
     The estimated subject distance using the pre-light emission dv_main is computed by the following mathematical formula (4) using the pre-light-adjustment evaluation value level_eva_pre calculated in step ST 47 , dv_pre obtained by the mathematical formula (3), and a target level level_target. It is noted that dv_main is set to a designated predetermined value in the case of level_eva_pre=0.
 
 dv _main= dv _pre−log 2(level_eva_pre/level_target)    (4)
 
     After the processing in step ST 48 , the CPU  153  ends the control processing in step ST 49 . 
     Here, specific examples of calculation of the pre-light-emission evaluation value level_eva_pre and the estimated subject distance using the pre-light emission dv_main will be described. First, the pre-light-emission evaluation value level_eva_pre will be described with reference to  FIGS. 8A, 8B, 8C, 8D, 8E, 8F, 8G, 8H, and 8I .  FIG. 8A  illustrates a live view. In addition,  FIG. 8B  illustrates an exposure state at the timing of the non-pre-light emission.  FIG. 8C  illustrates a detected value (photometric value) in each photometric area in the exposure state. 
       FIG. 8D  illustrates an exposure state at the timing of the pre-light emission.  FIG. 8E  illustrates a detected value (photometric value) in each photometric area in the exposure state.  FIG. 8F  illustrates a detected state. As illustrated in  FIG. 8G , each photometric value at the timing of the non-pre-light emission is subtracted from the corresponding photometric value at the timing of the pre-light emission to obtain a difference value for each photometric area. 
       FIG. 8H  illustrates the weighting coefficient ak for each photometric area.  FIG. 8I  illustrates the values each obtained by multiplying the difference value of each photometric area by the corresponding weighting coefficient ak. Therefore, in this specific example, the pre-light-emission evaluation value level_eva_pre is calculated as 14, as represented by the mathematical formula (5). 
     
       
         
           
             
               
                 
                   
                       
                   
                   ⁢ 
                   
                     [ 
                     
                       Math 
                       . 
                       
                           
                       
                       ⁢ 
                       3 
                     
                     ] 
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       
                         
                           level_eva 
                           ⁢ 
                           _pre 
                         
                         = 
                           
                         ⁢ 
                         
                           
                             ( 
                             
                               
                                 
                                   ∑ 
                                   
                                     
                                       m 
                                       * 
                                       n 
                                     
                                     - 
                                     1 
                                   
                                 
                                 
                                   k 
                                   = 
                                   0 
                                 
                               
                               ⁢ 
                               
                                 ( 
                                 
                                   ak 
                                   * 
                                   
                                     ( 
                                     
                                       
                                         lvl_pre 
                                         ⁢ 
                                         _k 
                                       
                                       - 
                                       
                                         lvl_nonpre 
                                         ⁢ 
                                         _k 
                                       
                                     
                                     ) 
                                   
                                 
                                 ) 
                               
                             
                             ) 
                           
                           ⁢ 
                           
                             / 
                           
                           ⁢ 
                           
                             ( 
                             
                               
                                 
                                   ∑ 
                                   
                                     
                                       m 
                                       * 
                                       n 
                                     
                                     - 
                                     1 
                                   
                                 
                                 
                                   k 
                                   = 
                                   0 
                                 
                               
                               ⁢ 
                               ak 
                             
                             ) 
                           
                         
                       
                     
                   
                   
                     
                       
                         = 
                           
                         ⁢ 
                         
                           808 
                           ⁢ 
                           
                             / 
                           
                           ⁢ 
                           57 
                         
                       
                     
                   
                   
                     
                       
                         = 
                           
                         ⁢ 
                         14 
                       
                     
                   
                 
               
               
                 
                   ( 
                   5 
                   ) 
                 
               
             
           
         
       
     
     Next, the estimated subject distance using the pre-light emission dv_main will be described. For example, the Apex value of each control value is assumed to be as follows. 
     Amount of pre-light emission: iv_pre
         Gno.2.0-&gt;iv_pre=−3       

     Aperture at the time of the pre-light emission: av_pre
         Fno.4.0-&gt;av_pre=4       

     Sensitivity (gain control) at the time of the pre-light emission: sv_pre
         ISO400-&gt;sv_pre=7       

     The distance dv_pre (Apex), which is appropriate for the amount of pre-light emission, is calculated from each control value, as represented by the following mathematical formula (6).
 
 dv _pre= iv _pre− av _pre+ sv _pre=−3−4+7=0   (6)
 
     As described above, the pre-light-emission evaluation value level_eva_pre is assumed to be calculated as 14. In addition, the target level level_target is assumed to be, for example, 40. The target level is a target exposure value, and the amount of main light emission is determined so as to reach this exposure value. 
     Pre-light-emission evaluation value: level_eva_pre
         level_eva_pre=14       

     Target level: level_target
         level_target=40       

     Therefore, in this specific example, the estimated subject distance dv_main is calculated as 1.515, as represented by the following mathematical formula (7). Here, 2{circumflex over ( )}(1.515/2)=1.69, and dv_main=1.515 corresponds to 1.69 m. 
     
       
         
           
             
               
                 
                   
                     
                       
                         dv_main 
                         = 
                           
                         ⁢ 
                         
                           dv_pre 
                           - 
                           
                             log 
                             ⁢ 
                             
                                 
                             
                             ⁢ 
                             2 
                             ⁢ 
                             
                               ( 
                               
                                 level_eva 
                                 ⁢ 
                                 _pre 
                                 ⁢ 
                                 
                                   / 
                                 
                                 ⁢ 
                                 level_target 
                               
                               ) 
                             
                           
                         
                       
                     
                   
                   
                     
                       
                         = 
                           
                         ⁢ 
                         
                           0 
                           - 
                           
                             log 
                             ⁢ 
                             
                                 
                             
                             ⁢ 
                             2 
                             ⁢ 
                             
                               ( 
                               
                                 14 
                                 ⁢ 
                                 
                                   / 
                                 
                                 ⁢ 
                                 40 
                               
                               ) 
                             
                           
                         
                       
                     
                   
                   
                     
                       
                         = 
                           
                         ⁢ 
                         1.515 
                       
                     
                   
                 
               
               
                 
                   ( 
                   7 
                   ) 
                 
               
             
           
         
       
     
     It is noted that in a case where the pre-light-emission evaluation value level_eva_pre is 0, that is, there is no reflection of the pre-light emission, it is determined that the subject is at an extremely distant position and dv_main is set to a designated large predetermined value. 
       FIG. 9  illustrates an example of the control processing of calculation of the amount of main light emission in the CPU  153 . First, the CPU  153  starts the control processing in step ST 51 . Next, in step ST 52 , the CPU  153  determines whether there is so-called AF low contrast where lens distance information cannot be used because of the in focus or indeterminate state. In a case where there is no AF low contrast, dv_lensNear and dv_lensFar are acquired as pieces of information regarding the distance from the camera (imaging apparatus) to the subject. 
     While dv_lensNear denotes the estimated near-side subject distance including the near-side error by the DV unit, dv_lensFar denotes the estimated far-side subject distance including the far-side error by the DV unit. DV refers to a unit of the Apex value indicating a distance. A relationship between the distance [m] and DV is as follows. It is noted that here, dv denotes a numerical value, while DV denotes the unit. 
     dv[DV]=log 2(dist[m]{circumflex over ( )}2) or dv[DV] 32  2×log 2(dist[m]) 
     dist: distance [m] 
     log 2: logarithm to the base  2   
     dist{circumflex over ( )}2: the square of dist 
     For example, the information regarding the estimated near-side subject distance dist_lensNear[m] and the information regarding the estimated far-side subject distance dist_lensFar[m] are supplied from the lens apparatus  200  to the imaging apparatus  100 , together with the information regarding the estimated subject distance dist_lensTyp[m].  FIG. 10  illustrates an example of a correspondence relationship between the actual subject distance [m] and the distance information output from the lens apparatus  200 . The CPU  153  can convert each of dist_lensNear[m] and dist_lensFar[m] into the DV unit system to obtain dv_lensNear[DV] and dv_lensFar[DV], respectively. The better the lens accuracy and focusing accuracy, the smaller the difference between dv_lensNear and dv_lensFar. 
     It is noted that in this case, dv_lensTyp[DV], dv_lensNear[DV], and dv_lensFar[DV], which are the pieces of distance information in the DV unit system, may be supplied from the lens apparatus  200  to the imaging apparatus  100 . Here, dv_lensTyp[DV] is obtained by converting dist_lensTyp[m] into the DV unit system. 
     Alternatively, for example, the information regarding the near-side error (dist_lensNear-dist_lensTyp)[m] and the information regarding the far-side error (dist_lensFar-dist_lensTyp)[m] are supplied from the lens apparatus  200  to the imaging apparatus  100 , together with the information regarding the estimated subject distance dist_lensTyp[m]. From these pieces of information, the CPU  153  can obtain the information regarding the estimated near-side subject distance dist_lensNear[m] including the near-side error and the information regarding the estimated far-side subject distance dist_lensFar[m] including the far-side error. Further, each of dist_lensNear[m] and dist_lensFar[m] can be converted into the DV unit system to obtain dv_lensNear[DV] and dv_lensFar[DV], respectively. 
     It is noted that dv_lensTyp[DV], which is distance information in the DV unit system, and (dv_lensNear-dv_lensTyp)[DV] and (dv_lensFar-dv_lensTyp)[DV], which are pieces of error information in the DV unit system, may be supplied from the lens apparatus  200  to the imaging apparatus  100 .  FIG. 11  illustrates an example of a correspondence relationship between the actual subject distance [DV] and the difference [DV] between the distance information output from the lens apparatus  200  and the actual distance, that is, (dv_lensNear-dv_lensTyp)[DV] and (dv_lensFar-dv_lensTyp)[DV]. 
     In addition, it is also conceivable to supply dist_lensTyp[m] or dv_lensTyp[DV], which is the information regarding the estimated subject distance, from the lens apparatus  200  to the imaging apparatus  100  and acquire (dist_lensNear-dist_lensTyp)[m] and (dist_lensNear-dist_lensTyp)[m] or (dv_lensNear-dv_lensTyp)[DV] and (dv_lensFar-dv_lensTyp)[DV], which are the pieces of error information, from the correspondence relationship between the estimated subject distances and the errors stored in association with the interchangeable lens  200  in a holding section, for example, the ROM  151  or the RAM  152 . 
     In this case, correspondence relationships between the estimated subject distances and the errors corresponding to a plurality of the interchangeable lenses  200  may be stored in advance in the holding section. Alternatively, when the interchangeable lens  200  is mounted on the imaging apparatus  100 , the communication interface  154  may download, from the external server, a correspondence relationship between the estimated subject distances and the errors corresponding to the interchangeable lens  200  on the basis of lens information regarding the interchangeable lens  200  and store the correspondence relationship in the holding section. 
     In addition, in this case, a correspondence relationship between the estimated subject distances and the errors corresponding to the interchangeable lens  200 , which has been input by the user from the operation section  121 , may be stored in advance in the holding section. In this case, since it is difficult to input the errors corresponding to all the estimated subject distances, the user may input only errors corresponding to several estimated subject distances and the CPU  153  may perform approximation computation using the input errors to interpolate error information corresponding to the other distances. 
     Next, returning to  FIG. 9 , in step ST 53 , the CPU  153  determines whether or not there is AF low contrast. In a case where there is AF low contrast, the CPU  153  proceeds to processing in step ST 54 . In this step ST 54 , the CPU  153  sets a final estimated subject distance dv_final for calculating the amount of main light emission as the estimated subject distance using the pre-light emission dv_main. 
     Next, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and main-light-emission exposure control values in step ST 55 . In this case, in a case where the aperture at the time of the main light emission is assumed to be av_main and the sensitivity (gain control) at the time of the main light emission is assumed to be sv_main, the amount of main light emission iv_main is obtained by the following mathematical formula (8) and a flash appropriate guide number Gno. is obtained by the following mathematical formula (9).
 
 iv _main= dv _final+ av _main− sv _main   (8)
 
Gno.=2{circumflex over ( )}(( iv _main+5)/2)   (9)
 
     Here, specific examples of calculation of the amount of main light emission iv_main and the flash appropriate guide number Gno. will be described. The control values (aperture and sensitivity) at the time of the main light emission are assumed to be the following values, for example. The control values may not necessarily match the control values at the time of the pre-light emission. 
     Aperture at the time of the main light emission: av_main
         Fno.4.0-&gt;av_main=4       

     Sensitivity (gain control) at the time of the main light emission: sv_main
         ISO800-&gt;sv_main=8       

     The amount of main light emission iv_main is calculated from each control value, as represented by the following mathematical formula (10). It is noted that the value of dv_final is assumed to be 1.515, which has been obtained by the above-described mathematical formula (7). In addition, the flash appropriate guide number Gno. is obtained as 2.4, as represented by the following mathematical formula (11).
 
 iv _main= dv _final+ av _main− sv _main=1.515+4−8=−2.485   (10)
 
Gno.=2{circumflex over ( )}((−2.485+5)/2)=2.4   (11)
 
     Returning to  FIG. 9 , after the processing in step ST 55 , the CPU  153  ends the control processing in step ST 56 . 
     In a case where there is no AF low contrast in step ST 53 , the CPU  153  determines or not in step ST 57  whether the bounce flag has been set. In a case where the bounce flag has not been set, the CPU  153  proceeds to processing in step ST 58 . 
     In this step ST 58 , the CPU  153  determines whether or not the estimated subject distance using the pre-light emission dv_main is within a range from the estimated far-side subject distance dv_lensFar to the estimated near-side subject distance dv_lensNear. In a case where the CPU  153  determines that the estimated subject distance using the pre-light emission dv_main is within the range, the CPU  153  sets the final estimated subject distance dv_final for calculating the amount of main light emission as the estimated subject distance using the pre-light emission dv_main in step  54 . Further, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In a case where the CPU  153  determines in step ST 58  that the estimated subject distance using the pre-light emission dv_main is not within the range, the CPU  153  proceeds to processing in step ST 59 . In this step ST 59 , the CPU  153  determines whether or not the estimated subject distance using the pre-light emission dv_main is within a far range longer than dv_lensFar+2DV. 
     In a case where dv_main &gt;dv_lensFar+2DV is satisfied in step ST 59 , the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount suppression side by subtracting only 2DV from the estimated subject distance using the pre-light emission dv_main in step ST 60 .  FIG. 12  illustrates a correction state for this case. In the example in the figure, “x” denotes the estimated subject distance using the pre-light emission dv_main, while “o” denotes the final estimated subject distance dv_final. It is noted that 2DV is an example and not a limitation. 
     After the processing in this step ST 60 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In addition, in a case where dv_main &gt;dv_lensFar+2DV is not satisfied in step ST 59 , the CPU  153  determines in step ST 61  whether or not the estimated subject distance using the pre-light emission dv_main is within a far range longer than dv_lensFar. 
     In a case where dv_main &gt;dv_lensFar is satisfied, the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount suppression side by setting the final estimated subject distance dv_final as the estimated far-side subject distance dv_lensFar in step ST 62 .  FIG. 13  illustrates a correction state for this case. In the example in the figure, “x” denotes the estimated subject distance using the pre-light emission dv_main, while “o” denotes the final estimated subject distance dv_final. It is noted that 2DV is an example and not a limitation. 
     After the processing in this step ST 62 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In addition, in a case where dv_main &gt;dv_lensFar is not satisfied in step ST 61 , the CPU  153  determines in step ST 63  whether or not the estimated subject distance using the pre-light emission dv_main is within a near range equal to or less than dv_lensFar−2DV. 
     In a case where dv_main &lt;=dv_lensNear−2DV is satisfied, the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount increase side by adding only 2DV to the estimated subject distance using the pre-light emission dv_main in step ST 64 .  FIG. 14  illustrates a correction state for this case. In the example in the figure, “x” denotes the estimated subject distance using the pre-light emission dv_main, while “o” denotes the final estimated subject distance dv_final. It is noted that 2DV is an example and not a limitation. 
     After the processing in this step ST 64 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In addition, in a case where dv_main &lt;=dv_lensNear−2DV is not satisfied in step ST 63 , the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount increase side by setting the final estimated subject distance dv_final as the estimated near-side subject distance dv_lensNear in step ST 65 .  FIG. 15  illustrates a correction state for this case. In the example in the figure, “x” denotes the estimated subject distance using the pre-light emission dv_main, while “o” denotes the final estimated subject distance dv_final. 
     After the processing in this step ST 65 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In addition, in a case where the bounce flag has been set in step ST 57 , the CPU  153  proceeds to processing in step ST 66 . In this step ST 66 , the CPU  153  determines whether or not the estimated subject distance using the pre-light emission dv_main is within a near range equal to or less than the estimated near-side subject distance dv_lensNear. 
     In a case where dv_main &lt;=dv_lensNear is not satisfied, the CPU  153  sets the final estimated subject distance dv_final for calculating the amount of main light emission as the estimated subject distance using the pre-light emission dv_main in step  54 . Further, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     On the other hand, in a case where dv_main &lt;=dv_lensNear is satisfied in step ST 66 , the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount increase side by setting the final estimated subject distance dv_final as the estimated near-side subject distance dv_lensNear in step ST 65  (see  FIG. 15 ). After the processing in this step ST 65 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     It is noted that although the CPU  153  proceeds to the processing in step ST 66  in a case where the bounce flag has been set in step ST 57  in the example of the control processing illustrated in the flowchart in  FIG. 9 , the CPU  153  may proceed to the processing in step ST 63 . In this case, in a case where dv_main &lt;=dv_lensNear−2DV is satisfied, the final estimated subject distance dv_final is obtained by adding only 2DV to the estimated subject distance using the pre-light emission dv_main. In a case where dv_main &lt;=dv_lensNear−2EV is not satisfied, the final estimated subject distance dv_final is set as the estimated near-side subject distance dv_lensNear. 
     In addition, a flowchart in  FIG. 16  illustrates another example of the control processing of calculation of the amount of main light emission in the CPU  153 . In  FIG. 16 , steps corresponding to the steps in  FIG. 9  will be assigned the same reference signs, and the detailed description thereof will be omitted. 
     In a case where the bounce flag has not been set in step ST 57 , the CPU  153  proceeds to processing in step ST 71 . In this step ST 71 , the CPU  153  determines whether or not the estimated subject distance using the pre-light emission dv_main is within the range from the estimated far-side subject distance dv_lensFar to the estimated near-side subject distance dv_lensNear. 
     In a case where the CPU  153  determines that the estimated subject distance using the pre-light emission dv_main is within the range, the CPU  153  sets the final estimated subject distance dv_final for calculating the amount of main light emission as the estimated subject distance using the pre-light emission dv_main in step  54 . Further, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In a case where the CPU  153  determines in step ST 71  that the estimated subject distance using the pre-light emission dv_main is not within the range, the CPU  153  proceeds to processing in step ST 72 . In this step ST 72 , the CPU  153  determines whether or not the estimated subject distance using the pre-light emission dv_main is within the far range longer than dv_lensFar. 
     In a case where dv_main &gt;dv_lensFar is satisfied, the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount suppression side by setting the final estimated subject distance dv_final as the estimated far-side subject distance dv_lensFar in step ST 73  (see  FIG. 13 ). On the other hand, in a case where dv_main &gt;dv_lensFar is not satisfied, the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount increase side by setting the final estimated subject distance dv_final as the estimated near-side subject distance dv_lensNear in step ST 74  (see  FIG. 15 ). 
     After the processing in this step ST 73  or ST 74 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In addition, in a case where the bounce flag has been set in step ST 57 , the CPU  153  proceeds to processing in step ST 75 . In this step ST 75 , the CPU  153  determines whether or not the estimated subject distance using the pre-light emission dv_main is within the near range equal to or less than the estimated near-side subject distance dv_lensNear. 
     In a case where dv_main &lt;=dv_lensNear is not satisfied, the CPU  153  sets the final estimated subject distance dv_final for calculating the amount of main light emission as the estimated subject distance using the pre-light emission dv_main in step  54 . Further, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     On the other hand, in a case where dv_main &lt;=dv_lensNear is satisfied in step ST 75 , the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount increase side by setting the final estimated subject distance dv_final as the estimated near-side subject distance dv_lensNear in step ST 74  (see  FIG. 15 ). After the processing in this step ST 74 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     It is noted that although there is no limitation to the correction amount in the control processing of calculation of the amount of main light emission illustrated in the flowchart in  FIG. 16 , there is a limitation to the correction amount in the control processing of calculation of the amount of main light emission illustrated in the above flowchart in  FIG. 9 . The correction limitation is set in consideration of the presence of models with poor focusing accuracy. 
     Some models have poor focusing accuracy and often fall into “false focusing” (the camera determines that the subject is in focus, but the subject is actually not in focus) without becoming AF low contrast. Setting the limitation to the correction amount can suppress the degree of overexposure and underexposure in a case where false focusing has occurred. This limits the extent of damage to exposure. 
     In addition, although the correction amount is limited to 2DV in the control processing of calculation of the amount of main light emission illustrated in the flowchart in  FIG. 9 , this limitation amount should be set depending on the lens accuracy and the focusing accuracy. In many cases, the lens accuracy and the focusing accuracy also depend on the focal length at the time of photographing (generally, it is difficult to attain the lens accuracy on the wide-angle side). 
     A flowchart in  FIG. 17  illustrates an example of control processing of the main-light-emission photographing sequence in the CPU  153 . First, the CPU  153  starts the control processing in step ST 81 . After that, the CPU  153  sets pre-light-emission control values in step ST 82 . 
     Next, the CPU  153  transmits the amount of main light emission from the light-emission control section  172  to the external flash  171  in step ST 83  and opens the shutter  111  to start exposure in step ST 84 . In step ST 85 , the CPU  153  performs main-light-emission trigger control to perform main light emission. After that, the CPU  153  closes the shutter to end exposure in step ST 86 . 
     Next, the CPU  153  performs imaging processing in step ST 87 . After the processing in this step ST 87 , the CPU  153  ends the control processing in step ST 88 . 
     As described above, in the imaging apparatus  100  in the imaging system  10  illustrated in  FIG. 1 , in a case where the external flash  171  is in the bounce state in which the external flash  171  does not face the subject and the estimated subject distance using the pre-light emission dv_main is within the near range equal to or less than the estimated near-side subject distance dv_lensNear, the final estimated subject distance dv_final is corrected to the light-emission-amount increase side. Therefore, it is possible to make the final estimated subject distance dv_final close to an appropriate value in a case where the reflectance of the subject is extremely high. This, as a result, makes it possible to increase the accuracy of adjusting the main light emission. 
     2. Modification 
     It is noted that although in the example described in the above-described embodiment, the amount of main light emission is controlled depending on whether the external flash  171  performs direct irradiation or bounce irradiation, that is, whether bouncing is on or off, it is also conceivable to control the amount of main light emission according to the bounce angle. 
     In a case where the amount of main light emission is controlled according to the bounce accuracy, the processing in steps ST 6  to ST 8  in the above-described flowchart in  FIGS. 2A and 2B  are replaced with processing in steps STST 92  to ST 94  illustrated in a flowchart in  FIG. 18 . 
     In a case where the external flash  171  has been mounted in step ST 5 , the CPU  153  proceeds to processing in step ST 92 . In this step ST 92 , the CPU  153  acquires, from the external flash  171 , direct light/bounce angle information, flash zoom information, and light-emission-amount attenuation rate information corresponding to the light distribution angle of flash light emission. It is noted that it is also conceivable that the CPU  153  acquires the light-emission-amount attenuation rate information corresponding to the light distribution angle from the holding section in the imaging apparatus  100 , for example, the ROM  151  or the RAM  152  on the basis of the bounce angle information acquired from the external flash  171 . 
     In this case, correspondence relationships between the bounce angles and the light-emission-amount attenuation rates corresponding to a plurality of the external flashes  171  may be stored in advance in the holding section. Alternatively, when the external flash  171  is mounted on the imaging apparatus  100 , the communication interface  154  may download, from the external server, a correspondence relationship between the bounce angles and the light-emission-amount attenuation rates corresponding to the external flash  171  on the basis of information regarding the external flash  171  and store the correspondence relationship in the holding section. 
     In addition, in this case, a correspondence relationship between the bounce angles and the light-emission-amount attenuation rates, which has been input by the user from the operation section  121 , may be stored in advance in the holding section. In this case, since it is difficult to input the light-emission-amount attenuation rates corresponding to all the bounce angles, the user may input only the light-emission-amount attenuation rates corresponding to several bounce angles and the CPU  153  may perform approximation computation using the input light-emission-amount attenuation rates to interpolate the light-emission-amount attenuation rates corresponding to the other bounce angles. 
     Next, the CPU  153  computes the attenuation rate of a direct-light component from the light distribution angle of flash light emission and the bounce angle in step ST 93 . Next, the CPU  153  calculates the light-emission-amount correction amount (light-distribution-angle correction amount) corresponding to the attenuation rate in step ST 94 . After the processing in step ST 94 , the CPU  153  proceeds to processing in step ST 9 . It is noted that in step ST 5 , in a case where the external flash  171  has not been mounted, the CPU  153  immediately proceeds to the processing in step ST 9 . 
       FIG. 19  illustrates a relationship between the optical axis of the external flash  171  and the vertical accuracy (elevation angle) θf from the optical axis.  FIG. 20  illustrates the light-emission-amount attenuation rate for each of the angular directions in the light distribution angles of 0 to 90 degrees in the vertical direction according to the respective flash zoom positions. 
     For example, in a case where the flash zoom position is set for a focal length of 35 mm, the amount of light emission at an elevation angle of 40° with respect to the optical axis of the light-emitting section of the flash is attenuated by 30% from the amount of light emission at the optical axis. Since the light-emission-amount attenuation rates at each flash zoom position depend on the optical design of the light-emitting section of the flash, the imaging apparatus (camera)  100  obtains information from the light-emitting section of the flash. Alternatively, in a case where the light-emission-amount attenuation rates are the same among any flashes in terms of the optical design, the light-emission-amount attenuation rates may be held as a table in the imaging apparatus (camera)  100 . 
     Although the attenuation rates at the identical angles in the vertical direction have the same numerical value in  FIG. 20 , the attenuation rates may have different numerical values in the vertical direction. In a case where the attenuation rate is known, the light-distribution-angle correction amount (EV) corresponding to the attenuation rate can be obtained by the following mathematical formula (12).
 
Light-distribution-angle correction amount ( EV )=Log 2(1/(1−attenuation rate))   (12)
 
     Generally, the amount of light emission instructed by the camera to the flash is the amount of light emission at the center of the optical axis of the light-emitting section. In a case where the camera gives an instruction to the flash taking into account the light-distribution-angle correction amount obtained by the above-described mathematical formula (12) for the amount of light emission at an angle deviated from the light-emission optical axis, the amount of light emission at this angle becomes the amount of light emission desired by the camera. 
     Incidentally, in a case where the light-emitting section of the flash is bounced upward, the subject on the photographing optical axis (lens optical axis) is irradiated with the direct-light component of the flash depending on the bounce angle.  FIG. 21  illustrates a relationship among the optical axis of the external flash  171 , the vertical accuracy (elevation angle) θf from the optical axis thereof, and the bounce angle θb. An angle area in a hatched portion denotes the direct-light component of the flash. The subject is directly irradiated with the light emission in this angle area. 
     A correlation between the “light-emitting section of the flash—the subject” distance and the amount of light emission holds true for this direct-light component. 
     Aperture av=log 2 (Fno.{circumflex over ( )}2) 
     Sensitivity sv=log 2(ISO/100)+5 
     Distance dv=log 2(dist{circumflex over ( )}2) dist[m] 
     Amount of pre-light emission iv=log 2(Gno.{circumflex over ( )}2)−5
         Amount of light emission Gno.=Distance[m]×Aperture Fno./√/(Sensitivity ISO/100)
 
( iv=dv+av−sv )
       

     As described above, the direct-light component has been subjected to the light-distribution-angle correction amount corresponding to the angle. Assuming that the bounce angle from the lens optical axis is θb, the light-distribution-angle correction amount thereof is the light-distribution-angle correction amount for an angle of:
 
θ=θ f−θb  
 
       FIG. 22  illustrates an example of a relationship between the vertical angle° from the optical axis of the light-emitting section and the light-emission attenuation rate, with a denoting for a focal length of 16 mm, b for a focal length of 35 mm, c for a focal length of 70 mm, and d for a focal length of 105 mm. In addition,  FIG. 23  illustrates an example of a relationship between the vertical angle° from the optical axis of the light-emitting section and the light-distribution-angle correction amount (EV), with a denoting for a focal length of 16 mm, b for a focal length of 35 mm, c for a focal length of 70 mm, and d for a focal length of 105 mm. 
     A flowchart in  FIG. 24  illustrates an example of control processing of calculation of the amount of main light emission in the CPU  153 . In  FIG. 24 , parts corresponding to the parts in  FIG. 16  are assigned the same reference signs and illustrated, and the detailed description thereof will be omitted, as appropriate. 
     First, in step ST 51 , the CPU  153  starts the control processing. Next, in step ST 52 A the CPU  153  determines whether there is so-called AF low contrast where the lens distance information cannot be used because of the in focus or indeterminate state. In a case where there is no AF low contrast, dv_lensNear and dv_lensFar are acquired as pieces of information regarding the distance from the camera (imaging apparatus) to the subject. 
     Next, in step ST 101 , the CPU  153  uses the following mathematical formula (13) to calculate dv_main_1, which factors in the light-distribution-angle correction amount into the estimated subject distance using the pre-light emission dv_main. At the time of the direct light, dv_main_1=dv_main.
 
 dv _main_1 =dv _main−Light-distribution-angle correction amount   (13)
 
     Next, in step ST 53 , the CPU  153  determines whether or not there is AF low contrast. In a case where there is AF low contrast, the CPU  153  proceeds to processing in step ST 54 . In this step ST 54 , the CPU  153  sets the final estimated subject distance dv_final for calculating the amount of main light emission as the estimated subject distance using the pre-light emission dv_main_1. 
     Next, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . In this case, in a case where the aperture at the time of the main light emission is assumed to be av_main and the sensitivity (gain control) at the time of the main light emission is assumed to be sv_main, the amount of main light emission iv_main is obtained by the following mathematical formula (14) and the flash appropriate guide number Gno. is obtained by the following mathematical formula (15).
 
 iv _main= dv _final+ av _main− sv _main+light-distribution-angle correction amount   (14)
 
Gno.={circumflex over ( )}2(( iv _main+5)/2)   (15)
 
     After the processing in step ST 55 , the CPU  153  ends the control processing in step ST 56 . 
     In a case where there is no AF low contrast in step ST 53 , the main-light-emission control type is selected on the basis of the bounce angle, the flash zoom position, and the photographing focal length in step ST 102 . Here, there are three main-light-emission control types: (1) use dv_lensNear and dv_lensFar; (2) use dv_lensNear only; and (3) not use dv_lensNear or dv_lensFar. 
     Here, the selection of the main-light-emission control type is further described. In the case of bouncing at an angle equal to or greater than a predetermined angle determined by the flash zoom position, no direct-light component exists in a lower part of the angle of view. In the case of bouncing at a further increased angle, the direct-light component completely deviates from the angle of view. Therefore, the correlation between the “light-emitting section of the flash-subject” distance and the amount of light emission does not hold true. 
       FIG. 25  illustrates an example of combinations for switching the main-light-emission control type according to the relationship between respective flash zoom positions and flash bounce angles. There are three different control types. The control type (1) is for a case where the light distribution angle is wide enough that light distribution reaches a lower part of the photographing angle of view even at the time of bouncing. The control type (1) is the same as the control at the time of no bouncing. The control type (3) is for a case where direct-light distribution does not enter the photographing angle of view at all. The control type (2) is for an intermediate area therebetween. 
     It is noted that although it is assumed in  FIG. 25  that the photographing angle of view (photographing focal length) and the flash zoom position are linked, some flashes have a mode in the flashes&#39; menu by which the flash zoom position is fixed regardless of the photographing focal length. In this case, although the combinations become different from the combinations in this table, the basic idea may only be as follows: select the control type (1) in a case where the photographing angle of view can be covered by the direct-light component; select the control type (3) in a case where light distribution is completely deviated; and select the control type (2) in the case of the intermediate condition that does not fall in either of the above conditions. 
     Returning to  FIG. 24 , after the processing in step ST 102 , the CPU  153  determines in step ST 103  what the main-light-emission-amount control type is. In a case where the main-light-emission-amount control type is the control type (3), the CPU  153  sets the final estimated subject distance dv_final for calculating the amount of main light emission as dv_main_1 in step  54 . Further, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In addition, in the case of the control type (1) in step ST 103 , the CPU  153  proceeds to processing in step ST 71 . In this step ST 71 , the CPU  153  determines whether or not dv_main_1 is within the range from the estimated far-side subject distance dv_lensFar to the estimated near-side subject distance dv_lensNear. 
     In a case where the CPU  153  determines that dv_main_1 is within the range, the CPU  153  sets the final estimated subject distance dv_final for calculating the amount of main light emission as dv_main_1 in step  54 . Further, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In a case where the CPU  153  determines in step ST 71  that dv_main_1 is not within the range, the CPU  153  proceeds to processing in step ST 72 . In this step ST 72 , the CPU  153  determines whether or not dv_main_1 is within the far range longer than dv_lensFar. 
     In a case where dv_main_1 &gt;dv_lensFar is satisfied, the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount suppression side by setting the final estimated subject distance dv_final as the estimated far-side subject distance dv_lensFar in step ST 73  (see  FIG. 13 ). On the other hand, in a case where dv_main_1 &gt;dv_lensFar is not satisfied, the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount increase side by setting the final estimated subject distance dv_final as the estimated near-side subject distance dv_lensNear in step ST 74  (see  FIG. 15 ). 
     After the processing in this step ST 73  or ST 74 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     In addition, in the case of the control type (2) in step ST 103 , the CPU  153  proceeds to processing in step ST 75 . In this step ST 75 , the CPU  153  determines whether or not dv_main_1 is within the near range equal to or less than the estimated near-side subject distance dv_lensNear. 
     In a case where dv_main_1 &lt;=dv_lensNear is not satisfied, the CPU  153  sets the final estimated subject distance dv_final for calculating the amount of main light emission as dv_main_1 in step  54 . Further, the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     On the other hand, in a case where dv_main_1 &lt;=dv_lensNear is satisfied in step ST 75 , the CPU  153  corrects the final estimated subject distance dv_final to the light-emission-amount increase side by setting the final estimated subject distance dv_final as the estimated near-side subject distance dv_lensNear in step ST 74  (see  FIG. 15 ). After the processing in this step ST 74 , the CPU  153  computes the amount of main light emission iv_main from the final estimated subject distance dv_final and the main-light-emission exposure control values in step ST 55 . After that, the CPU  153  ends the control processing in step ST 56 . 
     As described above, the processing of calculating the amount of main light emission illustrated in  FIG. 24  uses the estimated subject distance using the pre-light emission dv_main corrected on the basis of the light-distribution-angle correction amount obtained according to the orientation of the external flash  171 , that is, the bounce angle. Therefore, it is possible to obtain the final estimated subject distance dv_final more appropriately. This, as a result, makes it possible to increase the accuracy of adjusting the main light emission in a case where the light-emitting section does not face the subject. 
     In addition, it is conceivable that the processing of correcting the final estimated subject distance dv_final to the light-emission-amount increase side in the bounce state as in the above-described embodiment is not executed in a state where the external flash  171  is not fixed to the imaging apparatus  100  by the connection section  173 , for example, in a state where the external flash  171  is connected to the imaging apparatus  100  by wire or wireless. This is because in this state, there is a possibility that the optical path of the external flash  171  becomes shorter than the estimated subject distance actually generated on the basis of the focus information, and in this case, the erroneous final estimated subject distance dv_final is obtained, and the accuracy of adjusting the main light emission is reduced as a result. 
     In addition, although the preferred embodiment of the present disclosure has been described above in detail with reference to the accompanying drawings, the technical scope of the present disclosure is not limited to the example. A person having ordinally skill in the technical field of the present disclosure can obviously conceive of various kinds of alterations and modifications within the scope of the technical ideas described in the appended claims, and it should be understood that they will naturally come within the technical scope of the present disclosure. 
     In addition, the processing procedures described in the above-described embodiment may be regarded as a method including the series of procedures, or may be regarded as a program for causing a computer to carry out the series of procedures or as a recording medium storing the program. A CD (Compact Disc), an MD (MiniDisc), a DVD (Digital Versatile Disk), a memory card, a Blu-ray Disc (registered trademark), or the like can be used as the recording medium, for example. 
     In addition, the present technology can also be configured as follows. 
     (1) An imaging apparatus including: 
     a control section configured to adjust, in a case of bounce light emission, an amount of main light emission on the basis of an estimated pre-light-emitted subject distance or information corresponding to the estimated pre-light-emitted subject distance and an estimated lens-focused subject distance, the estimated pre-light-emitted subject distance and the information corresponding to the estimated pre-light-emitted subject distance being obtained by pre-light-emission processing, the estimated lens-focused subject distance being obtained from focus information through a lens. 
     (2) The imaging apparatus according to (1), in which near-side lens error information is reflected in the estimated lens-focused subject distance. 
     (3) The imaging apparatus according to (1) or (2), in which in a case where the estimated pre-light-emitted subject distance is greater than the estimated lens-focused subject distance, the control section is configured to adjust the amount of main light emission for the case of the bounce light emission without using the estimated lens-focused subject distance. 
     (4) The imaging apparatus according to any one of (1) to (3), in which the control section is configured to obtain an estimated subject distance for adjusting the main light emission on the basis of the estimated pre-light-emitted subject distance or the information corresponding to the estimated pre-light-emitted subject distance and the estimated lens-focused subject distance and adjust the amount of main light emission on the basis of the estimated subject distance for adjusting the main light emission. 
     (5) The imaging apparatus according to (4), in which in a case where the estimated pre-light-emitted subject distance is smaller than the estimated lens-focused subject distance, the control section is configured to set, as the estimated subject distance for adjusting the main light emission, a distance made closer to the estimated lens-focused subject distance from the estimated pre-light-emitted subject distance by a predetermined amount. 
     (6) The imaging apparatus according to (5), in which the control section is configured to set the estimated lens-focused subject distance as the estimated subject distance for adjusting the main light emission. 
     (7) The imaging apparatus according to (5), in which in a case where the estimated pre-light-emitted subject distance is smaller than the estimated lens-focused subject distance by a certain amount or greater, the control section is configured to set, as the estimated subject distance for adjusting the main light emission, a distance increased from the estimated pre-light-emitted subject distance by up to the certain amount. 
     (8) The imaging apparatus according to (2), in which the control section is configured to acquire, from a lens apparatus, information regarding the estimated lens-focused subject distance in which the near-side lens error information is reflected. 
     (9) The imaging apparatus according to (2), in which the control section is configured to acquire the near-side lens error information from a lens apparatus and obtain information regarding the estimated lens-focused subject distance in which the near-side lens error information is reflected. 
     (10) The imaging apparatus according to (2), further including: 
     a holding section configured to hold the near-side lens error information, 
     in which the control section is configured to acquire the near-side lens error information from the holding section and obtain information regarding the estimated lens-focused subject distance in which the near-side lens error information is reflected. 
     (11) The imaging apparatus according to (10), further including: 
     a communication section configured to acquire the near-side lens error information from an external server and hold the near-side lens error information in the holding section. 
     (12) The imaging apparatus according to (10), further including: 
     a user operation section configured to input the near-side lens error information and hold the near-side lens error information in the holding section. 
     (13) The imaging apparatus according to any one of (1) to (12), in which in a state where a light-emitting section is fixed to a housing of the imaging apparatus, the control section is configured to adjust, in the case of the bounce light emission, the amount of main light emission on the basis of the estimated pre-light-emitted subject distance and the estimated lens-focused subject distance. 
     (14) The imaging apparatus according to any one of (1) to (13), in which the control section is configured to correct the estimated pre-light-emitted subject distance on the basis of information regarding an orientation of a light-emitting section. 
     (15) The imaging apparatus according to (14), in which the control section is configured to obtain a correction amount of the estimated pre-light-emitted subject distance on the basis of a light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. 
     (16) The imaging apparatus according to (15), in which the control section is configured to acquire, from the light-emitting section, information regarding the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. 
     (17) The imaging apparatus according to (15), further including: 
     a holding section configured to hold the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section, 
     in which the control section is configured to acquire, from the holding section, information regarding the light-emission attenuation rate corresponding to the information regarding the orientation of the light-emitting section. 
     (18) A method for controlling an imaging apparatus, the method including: 
     adjusting, in a case of bounce light emission, an amount of main light emission on the basis of an estimated pre-light-emitted subject distance or information corresponding to the estimated pre-light-emitted subject distance and an estimated lens-focused subject distance, the estimated pre-light-emitted subject distance and the information corresponding to the estimated pre-light-emitted subject distance being obtained by pre-light-emission processing, the estimated lens-focused subject distance being obtained from focus information through a lens. 
     (19) A processing apparatus including: 
     a control section configured to adjust, in a case of bounce light emission, an amount of main light emission on the basis of an estimated pre-light-emitted subject distance or information corresponding to the estimated pre-light-emitted subject distance and an estimated lens-focused subject distance, the estimated pre-light-emitted subject distance and the information corresponding to the estimated pre-light-emitted subject distance being obtained by pre-light-emission processing, the estimated lens-focused subject distance being obtained from focus information through a lens. 
     (20) An imaging apparatus including: 
     a control section configured to control
         processing of obtaining an estimated pre-light-emitted subject distance obtained by pre-light-emission processing,   processing of obtaining an estimated near-side subject distance in which near-side lens error information is reflected and an estimated near-side subject distance in which far-side lens error information is reflected, the estimated near-side subject distances being obtained from focus information through a lens,   processing of correcting the estimated pre-light-emitted subject distance on the basis of information regarding an orientation of a light-emitting section, and   processing of adjusting an amount of main light emission on the basis of the estimated pre-light-emitted subject distance corrected, the estimated near-side subject distance, and an estimated far-side subject distance.       

     REFERENCE SIGNS LIST 
       10  . . . Imaging system 
       100  . . . Imaging apparatus 
       101  . . . Bus 
       111  . . . Shutter 
       112  . . . Shutter control section 
       113  . . . Imaging element 
       114  . . . Imaging control section 
       121  . . . Operation section 
       122  . . . Operation control section 
       131  . . . Display section 
       132  . . . Display control section 
       141  . . . Memory 
       142  . . . Memory control section 
       151  . . . ROM 
       152  . . . RAM 
       153  . . . CPU 
       161  . . . Communication section 
       162  . . . Photometry section 
       163  . . . Distance measurement section 
       171  . . . External flash 
       172  . . . Light-emission control section 
       173  . . . Connection section 
       200  . . . Interchangeable lens 
       211  . . . Lens section 
       212  . . . Aperture 
       220  . . . Interchangeable-lens control section 
       221  . . . Communication section