JP5831070B2 - Imaging device - Google Patents

Description

  The present invention relates to an imaging apparatus.

  Conventionally, an imaging device in which an array of a plurality of focus detection pixels that generate a pair of image signals corresponding to a pair of images formed by a pair of light beams passing through a photographing optical system is mixed in the array of imaging pixels is provided. The focus of the so-called pupil division phase difference detection method that detects the focus state of the photographing optical system based on the deviation amount of the pair of image signals generated by the focus detection pixel while generating the image signal by the output of the imaging pixel An imaging device having a detection function is known (for example, see Patent Document 1).

JP 2009-75407 A

  Here, in the prior art, since the focus detection pixels are arranged in the image sensor, the generation intervals of a pair of image signals used for focus detection are compared when continuous shooting is performed using a mechanical shutter. It has the characteristic of becoming longer. In such a conventional technique, when continuous shooting is performed using a mechanical shutter, a pair of image signals used for focus detection is the same as when continuous shooting is performed using an electronic shutter. When added, there were the following problems. That is, when continuous shooting is performed using a mechanical shutter, the generation interval of a pair of image signals used for focus detection is relatively long, and therefore, the degree of coincidence between the added image signals over time is increased. If it is lowered, there is a problem that the focus detection accuracy is lowered as a result.

  The problem to be solved by the present invention is to provide an imaging apparatus capable of appropriately performing focus detection of an optical system.

  The present invention solves the above problems by the following means. In the following description, the reference numerals corresponding to the drawings showing the embodiments of the present invention are used for explanation, but these reference numerals are only for facilitating the understanding of the present invention and are not intended to limit the invention. Absent.

[1] an imaging apparatus of the present invention includes an imaging unit for chromatic plurality of pixels (221, 222a, 222b) for outputting a signal by photoelectrically converting light incident through the imaging optical system (31, 32, 33) the and (22), and a mechanical shutter (23) for mechanically controlling the exposure of the imaging unit, and an electronic shutter for controlling the exposure of the imaging unit electronically, the signals output from the plurality of pixels, the A focus detection unit (21) that performs time series addition for each of a plurality of pixels , and detects a shift between the focus position of the imaging optical system and the position of the imaging unit from the phase difference of the added signals, and performs focus detection; the shutter for use in shooting, and the mechanical shutter, said control unit to switch the electronic shutter (21), wherein the focus detection unit, and when performing focus detection using the mechanical shutter, the electronic Shutter The number of times of adding the signals output from the plurality of pixels is made different when the focus detection is performed using.
[2] In the imaging apparatus of the present invention, the number of times of adding the signal when focus detection is performed using the mechanical shutter (23) is the same as that when the focus detection is performed using the electronic shutter. It can be configured to be less than the number of times.

[3] In the imaging apparatus of the present invention, the focus detection unit (21), the picture element (222a, 222b) based on the number of the signal generated within a predetermined time by the mechanical shutter (23) addition number of the signal in the case of using, and can be configured as to set the addition number of the signal in the case of using the electronic shutter.

[ 4 ] In the imaging apparatus of the present invention, the imaging unit (22) includes a plurality of focus detection pixels (222a, 222b), and the focus detection unit (21) includes the plurality of focus detection pixels. The output signal can be configured to be added in time series for each of the plurality of focus detection pixels .

  [4] In the imaging device of the present invention, continuous shooting can be performed using the mechanical shutter (23), and through images, moving images, and continuous shooting can be performed using the electronic shutter. It can be configured to be.

  According to the present invention, focus detection of an optical system can be performed appropriately.

FIG. 1 is a block diagram showing a camera according to the present embodiment. FIG. 2 is a front view showing an imaging surface of the imaging device shown in FIG. FIG. 3 is a front view schematically showing the arrangement of the focus detection pixels 222a and 222b by enlarging the vicinity of the focus detection pixel row 22a of FIG. FIG. 4 is an enlarged front view showing one of the imaging pixels 221. FIG. 5A is an enlarged front view showing one of the focus detection pixels 222a, and FIG. 5B is an enlarged front view showing one of the focus detection pixels 222b. FIG. 6 is an enlarged cross-sectional view showing one of the imaging pixels 221. FIG. 7A is an enlarged cross-sectional view showing one of the focus detection pixels 222a, and FIG. 7B is an enlarged cross-sectional view showing one of the focus detection pixels 222b. 8 is a cross-sectional view taken along line VIII-VIII in FIG. FIG. 9 is a flowchart showing the operation of the camera according to the present embodiment. FIG. 10A is a diagram illustrating an example of shooting operation timing in a mode in which continuous shooting is performed using the mechanical shutter 23, and FIG. 10B is a diagram illustrating continuous shooting using the electronic shutter. FIG. 10C is a diagram illustrating an example of the accumulation timing of the image sensor 22 in the performing mode, and FIG. 10C is a diagram illustrating an example of the accumulation timing of the image sensor 22 during the through image display.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a main part configuration diagram showing a digital camera 1 according to an embodiment of the present invention. A digital camera 1 according to the present embodiment (hereinafter simply referred to as a camera 1) includes a camera body 2 and a lens barrel 3, and the camera body 2 and the lens barrel 3 are detachably coupled by a mount unit 4. Yes.

  The lens barrel 3 is an interchangeable lens that can be attached to and detached from the camera body 2. As shown in FIG. 1, the lens barrel 3 includes a photographic optical system including lenses 31, 32, 33 and a diaphragm 34.

  The lens 32 is a focus lens, and can adjust the focal length of the photographing optical system by moving in the direction of the optical axis L1. The focus lens 32 is provided so as to be movable along the optical axis L1 of the lens barrel 3, and its position is adjusted by the focus lens drive motor 36 while its position is detected by the encoder 35.

  The specific configuration of the moving mechanism along the optical axis L1 of the focus lens 32 is not particularly limited. For example, a rotating cylinder is rotatably inserted into a fixed cylinder fixed to the lens barrel 3, a helicoid groove (spiral groove) is formed on the inner peripheral surface of the rotating cylinder, and the focus lens 32 is fixed. The end of the lens frame is fitted into the helicoid groove. Then, by rotating the rotary cylinder by the focus lens drive motor 36, the focus lens 32 fixed to the lens frame moves straight along the optical axis L1.

  As described above, the focus lens 32 fixed to the lens frame by rotating the rotary cylinder with respect to the lens barrel 3 moves straight in the direction of the optical axis L1, but the focus lens drive motor 36 as the drive source is the lens. The lens barrel 3 is provided. The focus lens drive motor 36 and the rotary cylinder are connected by a transmission composed of a plurality of gears, for example, and when the drive shaft of the focus lens drive motor 36 is driven to rotate in any one direction, it is transmitted to the rotary cylinder at a predetermined gear ratio. Then, when the rotating cylinder rotates in any one direction, the focus lens 32 fixed to the lens frame moves linearly in any direction of the optical axis L1. When the drive shaft of the focus lens drive motor 36 is rotated in the reverse direction, the plurality of gears constituting the transmission also rotate in the reverse direction, and the focus lens 32 moves straight in the reverse direction of the optical axis L1. .

  The position of the focus lens 32 is detected by the encoder 35. As described above, the position of the focus lens 32 in the optical axis L1 direction correlates with the rotation angle of the rotating cylinder, and can be obtained by detecting the relative rotation angle of the rotating cylinder with respect to the lens barrel 3, for example.

  As the encoder 35 of this embodiment, an encoder that detects the rotation of a rotating disk coupled to the rotational drive of the rotating cylinder with an optical sensor such as a photo interrupter and outputs a pulse signal corresponding to the number of rotations, or a fixed cylinder And the contact point of the brush on the surface of the flexible printed wiring board provided on either one of the rotating cylinders, and the brush contact provided on the other, the amount of movement of the rotating cylinder (in either the rotational direction or the optical axis direction) A device that detects a change in the contact position according to the detection circuit using a detection circuit can be used.

  The focus lens 32 can move in the direction of the optical axis L1 from the end on the camera body side (also referred to as the closest end) to the end on the subject side (also referred to as the infinite end) by the rotation of the rotating cylinder described above. it can. Incidentally, the current position information of the focus lens 32 detected by the encoder 35 is sent to the camera control unit 21 to be described later via the lens control unit 37, and the focus lens drive motor 36 calculates the focus calculated based on this information. The driving position of the lens 32 is driven by being sent from the camera control unit 21 via the lens control unit 37.

  The diaphragm 34 is configured such that the aperture diameter around the optical axis L1 can be adjusted in order to limit the amount of light flux that passes through the photographing optical system and reaches the image sensor 22 and to adjust the blur amount. The adjustment of the aperture diameter by the diaphragm 34 is performed, for example, by sending an appropriate aperture diameter calculated in the automatic exposure mode from the camera control unit 21 via the lens control unit 37. Further, the set aperture diameter is input from the camera control unit 21 to the lens control unit 37 by a manual operation by the operation unit 28 provided in the camera body 2. The aperture diameter of the aperture 34 is detected by an aperture sensor (not shown), and the lens controller 37 recognizes the current aperture diameter.

  The lens control unit 37 is electrically connected to the camera control unit 21 by an electric signal contact unit 41 provided on the mount unit 4, and is driven by the focus lens 32 and opened by the diaphragm 34 based on a command from the camera control unit 21. In addition to adjusting the aperture, lens information such as the position of the focus lens 32 and the aperture diameter of the diaphragm 34 is transmitted to the camera control unit 21.

  On the other hand, the camera body 2 is provided with an imaging element 22 that receives the light beam L1 from the photographing optical system on a planned focal plane of the photographing optical system, and a mechanical shutter 23 is provided on the front surface thereof. Examples of the mechanical shutter 23 include those having a front curtain and a rear curtain, and the front curtain and the rear curtain can shield a photographic light beam that reaches the image sensor 22. When the element 22 is exposed, the front curtain and the rear curtain form slits and travel with a predetermined time difference, so that the photographing light flux can be guided to the image sensor 22.

  The image sensor 22 is composed of a device such as a CCD or a CMOS, converts the received optical signal into an electrical signal, and sends it to the camera control unit 21. The captured image information sent to the camera control unit 21 is sequentially sent to the liquid crystal drive circuit 25 and displayed on the electronic viewfinder (EVF) 26 of the observation optical system, and a release button ( When (not shown) is fully pressed, the photographed image information is recorded in the camera memory 24 which is a recording medium. The camera memory 24 can be either a removable card type memory or a built-in memory. Details of the structure of the image sensor 22 will be described later.

  The camera body 2 is provided with an observation optical system for observing an image picked up by the image pickup device 22. The observation optical system of the present embodiment includes an electronic viewfinder (EVF) 26 composed of a liquid crystal display element, a liquid crystal driving circuit 25 that drives the electronic viewfinder (EVF) 26, and an eyepiece lens 27. The liquid crystal drive circuit 25 reads the captured image information captured by the image sensor 22 and sent to the camera control unit 21, and drives the electronic viewfinder 26 based on the read image information. Thereby, the user can observe the current captured image through the eyepiece lens 27. Note that, instead of or in addition to the observation optical system using the optical axis L2, a liquid crystal display may be provided on the back surface of the camera body 2, and a photographed image may be displayed on the liquid crystal display.

  A camera control unit 21 is provided in the camera body 2. The camera control unit 21 is electrically connected to the lens control unit 37 through an electric signal contact unit 41 provided in the mount unit 4, receives lens information from the lens control unit 37, and defocuses to the lens control unit 37. Send information such as volume and aperture diameter. The camera control unit 21 reads out the pixel output from the image sensor 22 as described above, generates image information by performing predetermined information processing on the read out pixel output as necessary, and generates the generated image information. Are output to the liquid crystal drive circuit 25 and the camera memory 24 of the electronic viewfinder 26. The camera control unit 21 controls the entire camera 1 such as correction of image information from the image sensor 22 and detection of a focus adjustment state and an aperture adjustment state of the lens barrel 3.

  In addition to the above, the camera control unit 21 detects the focus state of the photographic optical system by the phase detection method and the focus state of the photographic optical system by the contrast detection method based on the pixel data read from the image sensor 22. I do. A specific focus state detection method will be described later.

  The operation unit 28 is an input switch for a photographer to set various operation modes of the camera 1 such as a shutter release button and a moving image shooting start switch. The operation unit 28 switches between an auto focus mode / manual focus mode and an auto focus mode. In particular, the one-shot mode / continuous mode can be switched. In addition to the above, the operation unit 28 switches the shooting mode, specifically, the switching between the still image shooting mode / moving image shooting mode, and the still image shooting mode / still image continuous shooting mode. The shooting mode can be switched. Various modes set by the operation unit 28 are sent to the camera control unit 21, and the operation of the entire camera 1 is controlled by the camera control unit 21. The shutter release button includes a first switch SW1 that is turned on when the button is half-pressed and a second switch SW2 that is turned on when the button is fully pressed.

  Next, the image sensor 22 according to the present embodiment will be described.

  FIG. 2 is a front view showing the imaging surface of the imaging element 22, and FIG. 3 is a front view schematically showing the arrangement of the focus detection pixels 222a and 222b by enlarging the vicinity of the focus detection pixel row 22a in FIG.

  As shown in FIG. 3, the imaging element 22 of the present embodiment includes a green pixel G having a color filter in which a plurality of imaging pixels 221 are two-dimensionally arranged on the plane of the imaging surface and transmit a green wavelength region. A red pixel R having a color filter that transmits a red wavelength region and a blue pixel B having a color filter that transmits a blue wavelength region are arranged in a so-called Bayer Arrangement. That is, in four adjacent pixel groups 223 (dense square lattice arrangement), two green pixels are arranged on one diagonal line, and one red pixel and one blue pixel are arranged on the other diagonal line. The image sensor 22 is configured by repeatedly arranging the pixel group 223 on the imaging surface of the image sensor 22 in a two-dimensional manner with the Bayer array pixel group 223 as a unit.

  The unit pixel group 223 may be arranged in a dense hexagonal lattice arrangement other than the dense square lattice shown in the figure. Further, the configuration and arrangement of the color filters are not limited to this, and an arrangement of complementary color filters (green: G, yellow: Ye, magenta: Mg, cyan: Cy) can also be adopted.

  FIG. 4 is an enlarged front view showing one of the imaging pixels 221, and FIG. 6 is a cross-sectional view. One imaging pixel 221 includes a micro lens 2211, a photoelectric conversion unit 2212, and a color filter (not shown), and a photoelectric conversion unit is formed on the surface of the semiconductor circuit substrate 2213 of the image sensor 22 as shown in the cross-sectional view of FIG. 2212 is built in and a microlens 2211 is formed on the surface. The photoelectric conversion unit 2212 is configured to receive an imaging light beam that passes through an exit pupil (for example, F1.0) of the photographing optical system by the micro lens 2211, and receives the imaging light beam.

  Further, on the imaging surface of the imaging element 22, five focus detection pixel rows 22a to 22e in which focus detection pixels 222a and 222b are arranged instead of the above-described imaging pixel 221 are provided. As shown in FIG. 3, one focus detection pixel column is configured by a plurality of focus detection pixels 222 a and 222 b being alternately arranged adjacent to each other in a horizontal row. In the present embodiment, the focus detection pixels 222a and 222b are densely arranged without providing a gap at the position of the green pixel G and the blue pixel B of the image pickup pixel 221 arranged in the Bayer array.

  Note that the positions of the focus detection pixel rows 22a to 22e shown in FIG. 2 are not limited to the illustrated positions, and may be any one, two, three, or four locations, and more than six locations. It can also be arranged at the position. FIG. 3 shows an example in which the focus detection pixel array is configured by 16 focus detection pixels 222a and 222b, but the number of focus detection pixels configuring the focus detection pixel array is limited to this example. Is not to be done.

  FIG. 5A is an enlarged front view showing one of the focus detection pixels 222a, and FIG. 7A is a cross-sectional view of the focus detection pixel 222a. FIG. 5B is an enlarged front view showing one of the focus detection pixels 222b, and FIG. 7B is a cross-sectional view of the focus detection pixel 222b. As shown in FIG. 5A, the focus detection pixel 222a includes a micro lens 2221a and a semicircular photoelectric conversion unit 2222a. As shown in the cross-sectional view of FIG. A photoelectric conversion portion 2222a is formed on the surface of the semiconductor circuit substrate 2213, and a micro lens 2221a is formed on the surface. The focus detection pixel 222b includes a micro lens 2221b and a photoelectric conversion unit 2222b as shown in FIG. 5B, and a semiconductor of the image sensor 22 as shown in a cross-sectional view of FIG. 7B. A photoelectric conversion unit 2222b is formed on the surface of the circuit board 2213, and a microlens 2221b is formed on the surface. Then, as shown in FIG. 3, these focus detection pixels 222a and 222b are alternately arranged adjacent to each other in a horizontal row, thereby forming focus detection pixel rows 22a to 22c shown in FIG.

  The photoelectric conversion units 2222a and 2222b of the focus detection pixels 222a and 222b have such a shape that the microlenses 2221a and 2221b receive a light beam that passes through a predetermined region (eg, F2.8) of the exit pupil of the photographing optical system. Is done. Further, the focus detection pixels 222a and 222b are not provided with color filters, and their spectral characteristics are the total of the spectral characteristics of a photodiode that performs photoelectric conversion and the spectral characteristics of an infrared cut filter (not shown). ing. However, it may be configured to include one of the same color filters as the imaging pixel 221, for example, a green filter.

  In addition, although the photoelectric conversion units 2222a and 2222b of the focus detection pixels 222a and 222b illustrated in FIGS. 5A and 5B have a semicircular shape, the shapes of the photoelectric conversion units 2222a and 2222b are not limited thereto. Other shapes such as an elliptical shape, a rectangular shape, and a polygonal shape can also be used.

  Here, a so-called phase difference detection method for detecting the focus state of the photographing optical system based on the pixel outputs of the focus detection pixels 222a and 222b described above will be described.

  FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 3. The focus detection pixels 222 a-1, 222 b-1, 222 a-2, and 222 b-2 that are arranged in the vicinity of the photographing optical axis L 1 and adjacent to each other are It shows that light beams AB1-1, AB2-1, AB1-2, and AB2-2 irradiated from the distance measuring pupils 351 and 352 of the exit pupil 350 are received. 8 illustrates only the focus detection pixels 222a and 222b that are located in the vicinity of the photographing optical axis L1, but other focus detection pixels other than the focus detection pixels illustrated in FIG. 8 are illustrated. In the same manner, the light beams emitted from the pair of distance measuring pupils 351 and 352 are respectively received.

  Here, the exit pupil 350 is an image set at a distance D in front of the microlenses 2221a and 2221b of the focus detection pixels 222a and 222b arranged on the planned focal plane of the photographing optical system. The distance D is a value uniquely determined according to the curvature and refractive index of the microlens, the distance between the microlens and the photoelectric conversion unit, and the distance D is referred to as a distance measurement pupil distance. The distance measurement pupils 351 and 352 are images of the photoelectric conversion units 2222a and 2222b respectively projected by the micro lenses 2221a and 2221b of the focus detection pixels 222a and 222b.

  In FIG. 8, the arrangement direction of the focus detection pixels 222a-1, 222b-1, 222a-2, 222b-2 coincides with the arrangement direction of the pair of distance measuring pupils 351, 352.

  As shown in FIG. 8, the microlenses 2221a-1, 2221b-1, 2221a-2, and 2221b-2 of the focus detection pixels 222a-1, 222b-1, 222a-2, and 222b-2 are photographic optical systems. Near the planned focal plane. The shapes of the photoelectric conversion units 2222a-1, 2222b-1, 2222a-2, 2222b-2 arranged behind the micro lenses 2221a-1, 2221b-1, 2221a-2, 2221b-2 are the same as Projected onto the exit pupil 350 that is separated from the lenses 2221 a-1, 2221 b-1, 2221 a-2, and 2221 b-2 by a distance measurement distance D, and the projection shape forms distance measurement pupils 351 and 352.

  That is, the microlens and the photoelectric conversion unit in each focus detection pixel so that the projection shapes (distance measurement pupils 351 and 352) of the focus detection pixels coincide on the exit pupil 350 at the distance D. Is determined, and the projection direction of the photoelectric conversion unit in each focus detection pixel is thereby determined.

  As shown in FIG. 8, the photoelectric conversion unit 2222a-1 of the focus detection pixel 222a-1 is formed on the microlens 2221a-1 by the light beam AB1-1 that passes through the distance measuring pupil 351 and goes to the microlens 2221a-1. A signal corresponding to the intensity of the image to be output is output. Similarly, the photoelectric conversion unit 2222a-2 of the focus detection pixel 222a-2 passes through the distance measuring pupil 351, and the intensity of the image formed on the microlens 2221a-2 by the light beam AB1-2 toward the microlens 2221a-2. The signal corresponding to is output.

  Further, the photoelectric conversion unit 2222b-1 of the focus detection pixel 222b-1 passes through the distance measuring pupil 352, and the intensity of the image formed on the microlens 2221b-1 by the light beam AB2-1 directed to the microlens 2221b-1. Output the corresponding signal. Similarly, the photoelectric conversion unit 2222b-2 of the focus detection pixel 222b-2 passes through the distance measuring pupil 352, and the intensity of the image formed on the microlens 2221b-2 by the light beam AB2-2 toward the microlens 2221b-2. The signal corresponding to is output.

  Then, a plurality of the above-described two kinds of focus detection pixels 222a and 222b are arranged in a straight line as shown in FIG. Of the pair of images formed on the focus detection pixel array by the focus detection light fluxes passing through each of the distance measurement pupil 351 and the distance measurement pupil 352. Data on the distribution is obtained. In the present embodiment, the obtained intensity distribution data is added for each of the focus detection pixels 222a and 222b in time series to obtain added intensity distribution data. Then, by applying an image shift detection calculation process such as a correlation calculation process or a phase difference detection process to the obtained addition intensity distribution data, an image shift amount by a so-called phase difference detection method can be detected.

  Then, a conversion calculation is performed on the obtained image shift amount according to the center-of-gravity interval of the pair of distance measuring pupils, thereby obtaining a focal plane corresponding to the current focal plane (the position corresponding to the position of the microlens array on the planned focal plane). The deviation of the focal plane in the detection area), that is, the defocus amount can be obtained.

  In the present embodiment, as described above, the intensity distribution data obtained is added along the time series to amplify the intensity of the signal obtained by each focus detection pixel 222a, 222b. be able to. Therefore, by performing image shift detection calculation processing using the added intensity distribution data obtained by adding the intensity distribution data along the time series, the detection accuracy of the image shift amount by the phase difference detection method, The calculation accuracy of the defocus amount can be improved.

  The calculation of the image shift amount by the phase difference detection method and the calculation of the defocus amount based thereon are executed by the camera control unit 21.

  Further, the camera control unit 21 reads the output of the imaging pixel 221 of the imaging element 22 and calculates a focus evaluation value based on the read pixel output. This focus evaluation value can be obtained by, for example, extracting a high frequency component of an image output from the imaging pixel 221 of the imaging element 22 using a high frequency transmission filter and integrating the extracted high frequency component. It can also be obtained by extracting high-frequency components using two high-frequency transmission filters having different cutoff frequencies and integrating them.

  Then, the camera control unit 21 sends a control signal to the lens control unit 37 to drive the focus lens 32 at a predetermined sampling interval (distance) to obtain a focus evaluation value at each position, and the focus evaluation value is maximum. The focus detection by the contrast detection method is performed in which the position of the focus lens 32 is determined as the in-focus position. Note that this in-focus position is obtained when, for example, when the focus evaluation value is calculated while driving the focus lens 32, the focus evaluation value rises twice and then moves down twice. Can be obtained by performing an operation such as interpolation using the focus evaluation value.

  Next, an example of the operation of the camera 1 in the present embodiment will be described along the flowchart shown in FIG. Hereinafter, an operation example in the case where the still image continuous shooting mode is selected from among the still image shooting modes via the operation unit 28 will be described. The following operation is started when the camera 1 is turned on.

  First, in step S1, processing for starting accumulation by the image sensor 22 is performed. In the present embodiment, the electronic shutter function provided in the image sensor 22 is used to repeatedly accumulate at a predetermined frame rate f1, and thereby the image data obtained by the image pixel 221 and the five focus detection pixels. A pair of image data corresponding to the pair of images obtained by the focus detection pixels 222a and 222b constituting the columns 22a to 22e are repeatedly output to the camera control unit 21 at the frame rate f1.

  Next, in step S2, generation of a through image by the camera control unit 21 and display of the through image by the electronic viewfinder 26 of the observation optical system are started. Specifically, the pixel data of the imaging pixel 221 of the imaging element 22 is read by the camera control unit 21, and the camera control unit 21 generates a through image based on the read data. The through image generated by the camera control unit 21 is sent to the liquid crystal drive circuit 25 and displayed on the electronic viewfinder 26 of the observation optical system. As a result, the user can view the moving image of the subject through the eyepiece lens 27. The generation of the through image and the display of the through image are repeatedly executed at a predetermined frame rate f1 in synchronization with the accumulation operation by the image sensor 22.

  In step S3, the calculation process of the defocus amount by the phase difference detection method by the camera control unit 21 is started. In the present embodiment, the calculation process of the defocus amount by the phase difference detection method is performed as follows. That is, first, the camera control unit 21 reads a pair of image data corresponding to a pair of images obtained by the focus detection pixels 222 a and 222 b configuring the five focus detection pixel rows 22 a to 22 e of the image sensor 22. . In this case, when a specific focus detection position is selected by a user's manual operation, only data from focus detection pixels corresponding to the focus detection position may be read. In the present embodiment, based on the obtained pair of image data, intensity distribution data of a pair of images is generated, and the generated intensity distribution data is generated for each focus detection pixel 222a, 222b in time series. Is added to obtain the added intensity distribution data. Then, the camera control unit 21 executes image shift detection calculation processing (correlation calculation processing) based on the obtained added intensity distribution data, and image shift at the focus detection positions corresponding to the five focus detection pixel rows 22a to 22e. The amount is calculated, and the image shift amount is converted into a defocus amount.

  The number of intensity distribution data added when obtaining the added intensity distribution data is not particularly limited. For example, the number of intensity distribution data obtained from the focus detection pixels 222a and 222b within a predetermined time is set as the addition number. can do. In this case, the predetermined time is not particularly limited. For example, when the defocus amount is detected based on the intensity distribution data added within the predetermined time, the detection error of the defocus amount is equal to or less than the predetermined value. It can be time to become. Further, the number of additions of intensity distribution data may be appropriately determined according to the frame rate f1, and is a number that can be determined that the degree of coincidence between the intensity distribution data to be added is relatively high (that is, the intensity distribution data to be added). However, the number can be determined to be based on the same subject.

  Further, the camera control unit 21 evaluates the reliability of the calculated defocus amount. The reliability of the defocus amount is evaluated based on, for example, the degree of coincidence and contrast of a pair of image data. Then, the calculation process of the defocus amount by such a phase difference detection method is repeatedly executed at a predetermined frame rate f1 in synchronization with the accumulation operation by the image sensor 22.

  In step S4, a focus evaluation value calculation process by the camera control unit 21 is started. In the present embodiment, the focus evaluation value calculation process is performed by reading out the pixel output of the imaging pixel 221 of the imaging element 22, extracting a high-frequency component of the read-out pixel output using a high-frequency transmission filter, and accumulating these. Done. The focus evaluation value is calculated only when the specific focus detection position is selected by the user's manual operation or the subject recognition mode, and only the pixel output of the imaging pixel 221 corresponding to the selected focus detection position. It is good also as a structure which reads. The focus evaluation value calculation process is repeatedly executed at a predetermined frame rate f1 in synchronization with the accumulation operation by the image sensor 22.

  In step S5, the camera control unit 21 determines whether the shutter release button provided in the operation unit 28 is half-pressed (the first switch SW1 is turned on). If the first switch SW1 is turned on, the process proceeds to step S6. On the other hand, if the first switch SW1 is not turned on, step S5 is repeated until the first switch SW1 is turned on. In other words, until the first switch SW1 is turned on, accumulation by the image sensor 22, generation / display of a through image, defocus amount calculation processing by the phase difference detection method, and focus evaluation value calculation processing are repeatedly executed.

  In step S6, the camera control unit 21 determines whether or not the defocus amount has been calculated by the phase difference detection method. If the defocus amount can be calculated, it is determined that distance measurement is possible, and the process proceeds to step S13. On the other hand, if the defocus amount cannot be calculated, it is determined that distance measurement is impossible, and the process proceeds to step S7. In the present embodiment, even when the defocus amount can be calculated, even when the reliability of the calculated defocus amount is low, it is treated that the defocus amount cannot be calculated, and the process proceeds to step S7. Let's go ahead. In the present embodiment, for example, when the subject has a low contrast, the subject is an ultra-low brightness subject, or the subject is an ultra-high brightness subject, it is determined that the reliability of the defocus amount is low. .

  In step S6, the above determination may be performed using the result of the most recent defocus amount calculation process. However, in the most recent defocus amount calculation process, the defocus amount is continuously obtained. If the defocus amount cannot be calculated, or if the reliability of the defocus amount is low continuously, it is determined that distance measurement is impossible, and the process proceeds to step S7. In this case, if the defocus amount is calculated even once, it may be determined that distance measurement is possible and the process proceeds to step S13.

  If it is determined in step S6 that the defocus amount has been calculated and it is determined that distance measurement is possible, the process proceeds to step S13, and a focusing operation based on the defocus amount detected by the phase difference detection method is performed. . That is, in step S13, processing for driving the focus lens 32 to the in-focus position is performed based on the defocus amount detected by the phase difference detection method. Specifically, the camera control unit 21 calculates the lens driving amount necessary to drive the focus lens 32 to the in-focus position from the defocus amount detected by the phase difference detection method. The lens driving amount is sent to the lens driving motor 36 via the lens control unit 37. Then, the lens driving motor 36 drives the focus lens 32 to the in-focus position based on the lens driving amount calculated by the camera control unit 21.

  In the present embodiment, the camera control unit 21 repeatedly detects the defocus amount by the phase difference detection method even while the lens driving motor 36 is driven and the focus lens 32 is driven to the in-focus position. If, as a result, a new defocus amount is detected, the camera control unit 21 drives the focus lens 32 based on the new defocus amount.

  In step S13, the camera control unit 21 performs a scanning operation prohibition process as well as a process of driving the focus lens 32 to the in-focus position. Specifically, the camera control unit 21 sends a scan operation prohibition command to the lens control unit 37, and the scan operation is prohibited. The scan operation will be described later.

  When the driving of the focus lens 32 to the in-focus position is completed, the process proceeds to step S15.

  On the other hand, if it is determined in step S6 that the defocus amount cannot be calculated, or if it is determined that the calculated defocus amount is not reliable, the process proceeds to step S7. The control unit 21 performs a scan operation start process. In the scanning operation of this embodiment, the focus lens driving motor 36 scans the focus lens 32 at a predetermined driving speed, the camera control unit 21 calculates the defocus amount by the phase difference detection method, and the focus evaluation. The calculation of the value is simultaneously performed at the frame rate f1, and thereby, the detection of the in-focus position by the phase difference detection method and the detection of the in-focus position by the contrast detection method are performed simultaneously at the frame rate f1. .

  Specifically, the camera control unit 21 sends a scan drive start command to the lens control unit 37, and the lens control unit 37 drives the focus lens drive motor 36 based on the command from the camera control unit 21 to focus. The lens 32 is scan-driven along the optical axis L1. Note that the scan driving of the focus lens 32 may be performed from the infinite end to the close end, or may be performed from the close end to the infinite end.

  The camera control unit 21 reads a pair of image data corresponding to the pair of images from the focus detection pixels 222a and 222b of the image sensor 22 at the frame rate f1 while driving the focus lens 32 at a predetermined driving speed. Based on this, the defocus amount is detected by the phase difference detection method, and the focus lens 32 is driven at a predetermined drive speed, and the pixels from the image pickup pixels 221 of the image pickup device 22 at the frame rate f1. An output is read out, and based on this, a focus evaluation value is calculated. By acquiring focus evaluation values at different focus lens positions, the focus position is detected by a contrast detection method.

  In step S8, it is determined whether the defocus amount has been calculated by the phase difference detection method as a result of the scanning operation performed by the camera control unit 21. If the defocus amount can be calculated, it is determined that distance measurement is possible and the process proceeds to step S13. On the other hand, if the defocus amount cannot be calculated, it is determined that distance measurement is not possible and the process proceeds to step S9. . In step S8, similarly to step S6 described above, even when the defocus amount can be calculated, the defocus amount cannot be calculated if the reliability of the calculated defocus amount is low. It is assumed that the process proceeds to step S9.

  In step S9, as a result of the scanning operation performed by the camera control unit 21, it is determined whether or not the in-focus position (the peak position of the focus evaluation value) has been detected by the contrast detection method. If the in-focus position can be detected by the contrast detection method, the process proceeds to step S14. If the in-focus position cannot be detected, the process proceeds to step S10.

  In step S <b> 10, the camera control unit 21 determines whether the scan operation has been performed for the entire driveable range of the focus lens 32. When the scan operation is not performed for the entire driveable range of the focus lens 32, the process returns to step S8, and steps S8 to S10 are repeated to perform the scan operation, that is, while the focus lens 32 is driven to scan. The operation of simultaneously executing the calculation of the defocus amount by the phase difference detection method and the detection of the in-focus position by the contrast detection method at the frame rate f1 is continuously performed. On the other hand, if the scan operation has been completed for the entire driveable range of the focus lens 32, the process proceeds to step S11.

  If it is determined in step S8 that the defocus amount has been calculated by the phase difference detection method as a result of executing the scanning operation, the process proceeds to step S13, and detection is performed by the phase difference detection method in the same manner as described above. A focusing operation is performed based on the defocus amount. When the driving of the focus lens 32 to the in-focus position is completed, the process proceeds to step S15.

  As a result of executing the scanning operation, when it is determined in step S9 that the in-focus position has been detected by the contrast detection method, the scanning operation is stopped, and the process proceeds to step S14 where the detection is performed by the contrast detection method. A focusing operation based on the focusing position is performed. That is, in step S14, focusing drive processing for driving the focus lens 32 to the focus position (the peak position of the focus evaluation value) is performed based on the focus position detected by the contrast detection method.

  When the driving of the focus lens 32 to the in-focus position is completed, the process proceeds to step S15.

  In the scanning operation of the present embodiment, the above-described steps S8 to S10 are repeatedly executed to detect the defocus amount by the phase difference detection method while the focus lens 32 is scan-driven at a predetermined driving speed. And the detection of the in-focus position by the contrast detection method is simultaneously executed at the frame rate f1. Then, as a result of repeatedly executing steps S8 to S10 described above, the focus detection result by the detection method in which the defocus amount is calculated or the in-focus position can be detected first among the phase difference detection method and the contrast detection method. The focus lens 32 is used to drive to the in-focus position. Further, as described above, in the scanning operation of this embodiment, after determining whether or not the defocus amount can be calculated by the phase difference detection method (step S8), the focus position can be detected by the contrast detection method. If the phase difference detection method and the contrast detection method can calculate the defocus amount and detect the in-focus position at the same time by determining whether or not the focus position has been detected, the focus by the phase difference detection method is determined. The detection result is adopted in preference to the focus detection result by the contrast detection method.

  Therefore, according to the present embodiment, when it is difficult to detect the focus state of the photographing optical system by the phase difference detection method (for example, when photographing a subject having a different reflectance and a different color, or photographing a low-luminance subject) The focus detection of the photographic optical system is appropriately performed in both cases where it is difficult to detect the focus state of the photographic optical system using a contrast detection method (for example, when shooting a subject with low brightness). Can do. In addition, according to the present embodiment, the defocus amount detection by the phase difference detection method and the in-focus position detection by the contrast detection method are simultaneously performed, and the focus of the photographing optical system is detected by the method in which the focus detection can be performed first. In order to perform the adjustment, for example, compared with a method in which the focus lens 32 is driven to the vicinity of the in-focus position by the phase difference detection method, and then the in-focus position is detected by the contrast detection method in the vicinity of the in-focus position. The system can be focused in a short time.

  On the other hand, if it is determined in step S10 that the scan operation has been completed for the entire driveable range of the focus lens 32, the process proceeds to step S11. In step S11, as a result of performing the scanning operation, focus detection could not be performed by any of the phase difference detection method and the contrast detection method, so that the scanning operation end processing is performed, and then in step S12 Advancing and in-focus indication is performed. The in-focus indication is performed by the electronic viewfinder 26, for example.

  If the focus lens 32 is driven to the in-focus position based on the results of the phase difference detection method or the contrast detection method in steps S13 and S14, the process proceeds to step S15 after the drive of the focus lens 32 is completed. Then, it is determined whether or not the shutter release button provided in the operation unit 28 is fully pressed (the second switch SW2 is turned on). If the shutter release button is not fully pressed (second switch SW2 is turned on), the process proceeds to step S16. On the other hand, if the shutter release button is fully pressed (second switch SW2 is turned on), Proceed to step S18.

  In step S16, the camera control unit 21 drives the focus lens 32 to the in-focus position, and then determines whether or not the defocus amount can be calculated by the phase difference detection method at the current lens position. . If the defocus amount can be calculated, the process proceeds to step S17. On the other hand, if the defocus amount cannot be calculated, the process returns to step S7, and the scan operation is executed again (steps S7 to S10). ). In step S16, as in step S6 described above, when the reliability of the calculated defocus amount is low, it may be handled that the defocus amount cannot be calculated, As in step S6 described above, the result of the most recent defocus amount calculation process may be used, or the result of the most recent defocus amount calculation process may be used.

  In step S17, it is determined whether or not the focus state of the optical system has changed. Specifically, when the value of the defocus amount by the phase difference detection method is equal to or greater than a predetermined value (for example, when the value of the defocus amount exceeds the depth of field), the optical system It can be determined that the focus state has changed. If it is determined in step S17 that the focus state of the optical system has changed, the process returns to step S13, and processing for driving the focus lens 32 is performed based on the latest detected defocus amount. On the other hand, if it is determined that the focus state of the optical system has not changed, the process returns to step S15, and until the shutter release button is fully pressed (the second switch SW2 is turned on) again, or defocused. Steps S15 to S17 are repeatedly executed until it is determined that the amount cannot be calculated.

  On the other hand, if it is determined in step S15 that the shutter release button is fully pressed (second switch SW2 is turned on), the process proceeds to step S18, and continuous shooting is started in step S18. When continuous shooting is started, continuous shooting is continued while the shutter release button is fully pressed (while the second switch SW2 is on) (step S19 = On the other hand, when the full release of the shutter release button is released (the second switch SW1 is turned off) (step S19 = Yes), the process proceeds to step S20, the continuous shooting is finished, and this process is finished.

  In the present embodiment, when continuous shooting is performed, for example, a mode in which continuous shooting is performed using the mechanical shutter 23 in accordance with the frame rate of the continuous shooting, and an electronic device provided in the image sensor 22 are provided. Switching to a mode in which continuous shooting is performed using a shutter is possible. That is, for example, when the frame rate of continuous shooting is relatively low (when the number of frames taken per second is relatively small), a mode in which continuous shooting is performed using the mechanical shutter 23 can be set. On the other hand, when the frame rate of continuous shooting is relatively high (when the number of frames taken per second is relatively large), a mode for performing continuous shooting using an electronic shutter can be set.

  In the mode in which continuous shooting is performed using the electronic shutter, for example, as shown in FIG. 10B, when the shutter release button is fully pressed (the second switch SW2 is turned on), the image sensor 22 is used. Using the electronic shutter function provided in the image sensor 22 at the set frame rate f3, continuous shooting by the image sensor 22, and acquisition of a pair of image data by the focus detection pixels 222a and 222b provided in the image sensor 22. Is repeatedly executed. In other words, continuous shooting and accumulation for focus detection (accumulation for shooting / AF in FIG. 10B) are repeatedly executed by the image sensor 22 at the set frame rate f3.

  In the present embodiment, in the mode in which continuous shooting is performed using the electronic shutter, as shown in FIG. 10B, the image sensor 22 before the second switch SW2 is turned on, that is, during through image display. Focus detection pixels under the same conditions (that is, the same accumulation time, photographing aperture, and photographing mode) as in the above-described accumulation (through image / AF accumulation in FIG. 10B), and also at a relatively high frame rate. Acquisition of a pair of image data (accumulation for focus detection) can be performed by 222a and 222b. Therefore, in the mode in which continuous shooting is performed using the electronic shutter, when the defocus amount is calculated by the phase difference detection method, the addition number of the intensity distribution data when obtaining the added intensity distribution data is set to the second switch SW2. Can be set to the same level as when the through image is being displayed. Note that the number of additions when performing continuous shooting using an electronic shutter is not particularly limited. For example, the number of additions in a mode in which continuous shooting is performed using an electronic shutter is used. When performing, it can set based on the number of intensity distribution data obtained within the predetermined time t. Here, the predetermined time t is a detection error of the defocus amount when the defocus amount is detected based on the added intensity distribution data obtained by adding the intensity distribution data obtained within the predetermined time t. Therefore, when the continuous shooting is performed using the electronic shutter, the number of additions in the mode in which the continuous shooting using the electronic shutter is performed is the intensity distribution data obtained within the predetermined time t. By setting based on the number, the defocus amount can be appropriately calculated in the mode in which continuous shooting is performed using the electronic shutter. For example, in a mode in which continuous shooting is performed using an electronic shutter, if seven intensity distribution data are obtained within a predetermined time t, the addition number in the mode in which continuous shooting is performed using an electronic shutter is set to 7. Can be set. Further, the number of additions in the mode for performing continuous shooting using the electronic shutter may be configured to be smaller than the number of intensity distribution data obtained within a predetermined time t according to the luminance of the subject. FIG. 10C shows an example of the accumulation timing of the image sensor 22 during through image display.

  In the mode in which continuous shooting is performed using the electronic shutter, the defocus amount is calculated by the phase difference detection method by the camera control unit 21 using such added intensity distribution data during continuous shooting. When the calculated defocus amount value is greater than or equal to a predetermined value (for example, when the defocus amount value exceeds the depth of field), the latest detected defocus amount is detected. The focus lens 32 is driven based on the focus amount.

  On the other hand, in the mode in which continuous shooting is performed using the mechanical shutter 23, as shown in FIG. 10A, when the second switch SW2 is turned on, shooting preparation operation and shooting operation for continuous shooting are performed. And after completion of photographing, accumulation for focus detection (acquisition of a pair of image data by the focus detection pixels 222a and 222b provided in the image sensor 22) is performed at a frame rate f2. By repeating, continuous shooting is executed.

  Note that, as the shooting preparation operation, an operation for changing the aperture 34 to an aperture value for main shooting or a shooting mode for main shooting (for example, a shooting mode for acquiring pixel data without thinning out) is performed. An operation for changing, and an operation for adjusting the position of an anti-vibration lens (not shown) can be mentioned. Further, as a photographing operation, the mechanical shutter 23 is opened while the image sensor 22 is exposed, the photographing light flux is guided to the image sensor 22, and then the mechanical shutter 23 is closed after a predetermined exposure time has elapsed, For example, an operation of shielding the imaging light flux reaching the lens 22 and ending the exposure by the image sensor 22 may be used. Further, as the photographing end operation, an operation for returning the diaphragm 34 to the aperture value for focus detection, and the photographing element 22 in the photographing mode for focus detection (for example, the same photographing mode as before the second switch SW2 is turned on). The operation to change is mentioned.

  In the mode in which continuous shooting is performed using the mechanical shutter 23, as shown in FIG. 10A, focus detection by the image sensor 22 is performed during continuous shooting after the second switch SW2 is turned on. The time interval for storage (accumulation for AF in FIG. 10A) increases. Therefore, when calculating the defocus amount by the phase difference detection method in the mode in which continuous shooting is performed using the mechanical shutter 23, the addition number of the intensity distribution data when obtaining the additional intensity distribution data is calculated using an electronic shutter. If the number of additions in the continuous shooting mode is the same as the number of additions before the second switch SW2 is turned on, i.e., during live view display, between the intensity distribution data to be added due to camera shake or movement of the subject. As a result, the accuracy of the added intensity distribution data is reduced, and the calculation accuracy of the defocus amount is reduced.

  Therefore, in the present embodiment, in the mode in which continuous shooting is performed using the mechanical shutter 23, the addition number of the intensity distribution data when obtaining the additional intensity distribution data is set in the mode in which continuous shooting is performed using the electronic shutter. The number of additions and the number of additions before the second switch SW2 is turned on, that is, during the through image display, are set. That is, the addition number in the mode in which continuous shooting is performed using the mechanical shutter 23 is N2, the addition number in the mode in which continuous shooting is performed using the electronic shutter is N3, and the addition number during through image display is N1. In this case, N2 <N3 and N2 <N1 are set. The addition number N2 in the mode in which continuous shooting is performed using the mechanical shutter 23 may be set so as to satisfy the relationship of N2 <N3 and N2 <N1, and is not particularly limited, but the mechanical shutter 23 is used. In the continuous shooting mode, the addition number N2 is the intensity obtained within a predetermined time t when continuous shooting is performed using the mechanical shutter 23, as in the case of continuous shooting using the electronic shutter. It can be set based on the number of distribution data. The addition number N2 can also be set according to the frame rate f2 at the time of continuous shooting. For example, in the mode in which continuous shooting is performed using the mechanical shutter 23, when two intensity distribution data can be obtained within a predetermined time t, the addition number N2 = 2 can be set. That is, only two of the intensity distribution data obtained by the latest focus detection accumulation and the intensity distribution data obtained by the focus detection accumulation performed immediately before the latest continuous shooting are added. It can be set as a simple structure.

  Then, in the mode in which continuous shooting is performed using the mechanical shutter 23, during the continuous shooting, using the addition intensity distribution data added by such an addition number N2 (N2 <N3, N2 <N1), When the camera control unit 21 calculates the defocus amount by the phase difference detection method and the calculated defocus amount value is equal to or greater than a predetermined value (for example, the defocus amount value indicates the depth of field). In the case of exceeding the value), the focus lens 32 is driven based on the latest detected defocus amount.

  As described above, the camera 1 according to this embodiment operates.

  In the above-described operation example, as an example of a scene in which shooting is performed using the electronic shutter provided in the image sensor 22, the through image display and the continuous shooting are illustrated and described. Shooting can be performed using an electronic shutter. Even in this case, when calculating the defocus amount by the phase difference detection method, the number of additions of the intensity distribution data when obtaining the addition intensity distribution data can be the same as described above.

  In the present embodiment, when continuous shooting is performed using the mechanical shutter 23, the addition number of the intensity distribution data when obtaining the addition intensity distribution data for calculating the defocus amount by the phase difference detection method is set. The number of additions in the mode in which continuous shooting is performed using the electronic shutter, or the number before the second switch SW2 is turned on, that is, the number of additions during live view image display, is set. Therefore, according to the present embodiment, during continuous shooting using the mechanical shutter 23, the time interval of accumulation for focus detection by the image sensor 22 becomes large, and thus when obtaining the added intensity distribution data, It is possible to prevent the degree of coincidence between the intensity distribution data to be added from being remarkably lowered, and thereby the accuracy of the obtained addition intensity distribution data can be improved. As a result, the accuracy of calculating the defocus amount when continuous shooting is performed using the mechanical shutter 23 can be improved, and thus continuous shooting is performed using the mechanical shutter 23. When performing, it is possible to appropriately detect the focus of the photographing optical system.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Digital camera 2 ... Camera body 21 ... Camera control part 22 ... Imaging device 221 ... Imaging pixel 222a, 222b ... Focus detection pixel 23 ... Mechanical shutter 3 ... Lens barrel 32 ... Focus lens 36 ... Focus lens drive motor 37 ... Lens Control unit

Claims (5)

An imaging unit that have a plurality of pixels for outputting a signal light incident through the imaging optical system and photoelectrically converted,
A mechanical shutter that mechanically controls exposure of the imaging unit;
An electronic shutter for electronically controlling the exposure of the imaging unit,
The signals output from the plurality of pixels are added in time series for each of the plurality of pixels , and a shift between the focal position of the photographing optical system and the position of the imaging unit is detected from the phase difference of the added signals. A focus detection unit for performing focus detection,
The shutter for use in shooting, comprising said mechanical shutter, and a control unit for switching between the electronic shutter,
The focus detection unit is configured to change the number of times of adding signals output from the plurality of pixels when performing focus detection using the mechanical shutter and when performing focus detection using the electronic shutter. apparatus. The imaging apparatus according to claim 1,
The number of times of adding the signal when performing focus detection using the mechanical shutter is less than the number of times of adding the signal when performing focus detection using the electronic shutter. The imaging device according to claim 1 or 2 ,
The focus detection unit, based on the number of the signal generated within a predetermined time by the picture element, adding the number of the signal in the case of using the mechanical shutter, and the in the case of using the electronic shutter to set the addition number signal imaging device. In the imaging device in any one of Claims 1-3,
The imaging unit has a plurality of focus detection pixels,
The focus detection unit, the plurality of signals output from the focus detection pixels, imaging device for adding in time series for each of the plurality of focus detection pixels. In the imaging device according to any one of claims 1 to 4 ,
Using said mechanical shutter, is capable of continuous shooting, using the electronic shutter, photographing of the through image, capturing a moving image and continuous shooting imaging can der Ru imaging device.

Images