JP2008185611A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an out-of-focus image from being shown in displaying a live view. <P>SOLUTION: The imaging apparatus includes: a display means capable of displaying an image obtained by picking up an image through a photographic lens; a display instruction means for instructing to display the image by the display means; a focus adjustment control means for detecting the focusing state of the photographic lens and making a focus adjustment for the photographic lens based on the focused state; and a control means for making the focus adjustment for the photographic lens by the focus adjustment control means when the display instruction means instructs to display the image, thereby displaying the image obtained by the focus adjustment onto the display means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an imaging apparatus that adjusts the focus of a photographing lens.

  2. Description of the Related Art Conventionally, when performing live view display in a single-lens reflex digital camera, a device that retracts a quick return mirror from an imaging optical system and displays an image obtained in that state is known (see Patent Document 1). .

JP 2001-272593 A

  When an image by live view display is displayed on the conventional camera described above, the focus of the photographing lens is adjusted by executing a contrast detection type autofocus process based on the displayed image. Therefore, immediately after the live view display, the focus adjustment of the photographic lens has not yet been performed, and thus a blurred image may be displayed.

An image pickup apparatus according to the present invention detects display means capable of displaying an image obtained by picking up an image by a photographing lens, display instruction means for instructing display of an image by the display means, and a focus adjustment state of the photographing lens. The focus adjustment control means for adjusting the focus of the photographing lens based on the focus adjustment state, and when the display instruction means instructs display of the image, the focus adjustment control means performs the focus adjustment of the photographing lens, And control means for displaying on the display means an image obtained with the focus adjusted.
According to a second aspect of the present invention, in the imaging apparatus according to the first aspect, the focus adjustment control means can be set so as to perform the focus adjustment of the photographing lens by a manual operation regardless of the focus adjustment state. When the display instruction means instructs the display of the image while the focus adjustment control means is set to perform the focus adjustment by manual operation, the focus adjustment control is performed so as to perform the focus adjustment based on the focus adjustment state. The setting of the means is changed.
According to a third aspect of the present invention, in the imaging apparatus according to the first or second aspect, the focus adjustment control means detects a plurality of focus adjustment states at a plurality of positions in the screen by the photographing lens, and the plurality of focus adjustment states. Any one of the focus adjustment states can be selected from the control means, and the control means displays the image obtained in a state where the focus adjustment is performed based on the focus adjustment states selected from the plurality of focus adjustment states by the focus adjustment control means. Is displayed.
According to a fourth aspect of the present invention, there is provided the imaging apparatus according to the third aspect, further comprising: an eyepiece for observing an image by the photographing lens; and a detection unit for detecting whether the photographer has looked into the eyepiece. Prepare. In this imaging apparatus, the control means detects a plurality of focus adjustment states when an instruction to display an image is given by the display instruction means in a state where the detection section detects that the photographer is not looking into the eyepiece. The image obtained in the state where the focus adjustment is performed based on the focus adjustment state selected from the above is displayed on the display means.
According to a fifth aspect of the present invention, in the imaging apparatus according to the third or fourth aspect, the display unit detects a focus adjustment state selected by the focus adjustment control unit from a plurality of positions in the screen by the photographing lens. The position is displayed.
A sixth aspect of the present invention is the imaging apparatus according to any one of the first to fifth aspects, further comprising a second focus adjustment control unit that detects a focus adjustment state of the photographing lens based on a value related to a contrast of the image. . In this imaging apparatus, the second focus adjustment control means detects the focus adjustment state based on the state where the focus adjustment is performed by the focus adjustment control means.

  According to the present invention, it is possible to prevent a blurred image from being displayed during live view display.

-First embodiment-
A single-lens reflex digital camera equipped with a focus adjustment apparatus according to an embodiment of the present invention will be described below. This camera adjusts the focus of the photographing lens by hybrid AF that uses both auto-focusing of phase difference detection (hereinafter referred to as phase-difference AF) and auto-focusing of contrast detection (hereinafter referred to as contrast AF). Is what you do. The phase difference AF is an autofocus that detects the defocus amount of the photographing lens based on the positional relationship between a pair of images by two light beams that have passed through different areas of the photographing lens, and performs focus adjustment based on the detection result. This is the method. On the other hand, contrast AF is an autofocus method that detects a value related to the contrast of an image by a photographing lens and performs focus adjustment based on the detection result.

  Furthermore, the camera of the present embodiment retracts a quick return mirror that exists on the optical path from the photographing lens to the image sensor in accordance with an instruction from the photographer, and in that state, the image of the subject obtained by the image sensor is liquid crystal Show on the display. Thus, the photographer can confirm the composition before photographing without looking through the viewfinder. Displaying the subject image in this manner is hereinafter referred to as live view display.

  FIG. 1 is a block diagram illustrating a main configuration of the camera according to the present embodiment. A lens barrel 2 having a photographic lens is mounted on the camera body 1 in a replaceable manner. In the lens barrel 2, photographing lenses 201a to 201c, an AF drive motor 202, and a diaphragm member 203 are provided. The photographing lens 201 b is a focus adjustment lens that is driven by an AF drive motor 202.

  In the camera body 1, there are a phase difference AF detection element 101, an AF-CCD control unit 102, a focus detection calculation unit 103, a contrast calculation unit 104, an image pickup element 105, a quick return mirror 106, a sub mirror 107, a finder screen 108, a penta A prism 109, an eyepiece lens 110, and an eyepiece unit 111 are provided. The AF-CCD control unit 102, the focus detection calculation unit 103, and the contrast calculation unit 104 are realized by the function of the control circuit 100 including a CPU, ROM, RAM, various peripheral circuits, and the like.

  The phase difference AF detection element 101 has a mask part (not shown), a re-imaging lens, an AF CCD line sensor arranged at a plurality of positions, and the like. The phase difference AF detection element 101 is input with a light flux from a subject that is incident through the photographing lenses 201 a to 201 c, passes through the quick return mirror 106, and is reflected by the sub mirror 107. After splitting this incident light beam into two light beams that pass through different areas of the photographic lens by the mask part, a pair of subject images are re-imaged on the CCD line sensor by the re-imaging lens, and the detection result of the image position is obtained. A representative image signal is output from the CCD line sensor.

  A pair of subject images re-imaged on the CCD line sensor in the phase difference AF detection element 101 approach each other in a so-called front pin state in which the photographing lenses 201a to 201c form a sharp image of the subject before the planned focal plane, Conversely, in a so-called rear pin state in which a sharp image of the subject is connected behind the planned focal plane, they move away from each other. Further, in a focused state in which the photographing lenses 201a to 201c form a sharp image of the subject on the planned focal plane, the pair of subject images relatively match. Therefore, by re-imaging a pair of subject images as described above and detecting the image position by the CCD line sensor, the focus adjustment of the photographing lenses 201a to 201c is performed based on the incident light flux from the photographing lenses 201a to 201c. A state is detected.

  The AF-CCD control unit 102 controls the gain amount and accumulation time of the CCD line sensor provided in the phase difference AF detection element 101. Further, one of the focus detection areas is selected from a plurality of focus detection areas set in the image plane by the incident light beams from the photographing lenses 201a to 201c. The image signal in the selected focus detection area is read from the CCD line sensor of the phase difference AF detection element 101 and output to the focus detection calculation unit 103.

  Based on the output value of the CCD line sensor read by the AF-CCD control unit 102, the focus detection calculation unit 103 calculates a defocus amount representing the focus adjustment state (focus amount) of the photographing lenses 201a to 201c. To do. Then, the drive amount of the focus adjustment lens 201 b is determined based on the calculated defocus amount, and a drive control signal is output to the AF drive motor 202. In response to this drive control signal, the AF drive motor 202 drives the focus adjustment lens 201b, thereby performing focus adjustment of the photographing lenses 201a to 201c by phase difference AF.

  The contrast calculation unit 104 calculates a focus evaluation value corresponding to the contrast of the subject image by removing a high-frequency component from the image pickup signal output from the image sensor 105 and performing a known focus evaluation value calculation. In a focused state in which the photographing lenses 201a to 201c form a sharp image on the image sensor 105, the blur of the edge of the subject image is minimized and the contrast is maximized, so that the focus evaluation value is also maximized. Then, the drive amount of the focus adjustment lens 201 b is determined based on the calculated focus evaluation value, and a drive control signal is output to the AF drive motor 202 in the same manner as the focus detection calculation unit 103. The AF drive motor 202 drives the focus adjustment lens 201b in accordance with the drive control signal, thereby performing focus adjustment of the photographing lenses 201a to 201c by contrast AF.

  As the image sensor 105, a CCD, a CMOS, or the like is used. Between the photographing lenses 201a to 201c and the image sensor 105, a quick return mirror 106 that reflects the incident light beam from the subject that has passed through the photographing lenses 201a to 201c to the finder optical system is disposed. A part of the incident light beam passes through the semi-transmissive region of the quick return mirror 106, is reflected downward by the sub mirror 107, and then enters the phase difference AF detection element 101.

  The incident light beam reflected by the quick return mirror 106 forms a subject image on a finder screen 108 provided at a position optically equivalent to the image sensor 105. The subject image formed on the finder screen 108 is guided from the pentaprism 109 to the eyepiece 111 through the eyepiece 110. The photographer can check the composition before photographing by looking through the eyepiece 111 and visually recognizing the subject image.

  When shooting or live view display is performed on the camera body 1, the quick return mirror 106 and the sub mirror 107 are moved from the optical path to the outside of the optical path, and a subject image is formed on the image sensor 105 by the incident light flux. . A captured image is acquired by capturing the subject image with the image sensor 105 and recorded in a memory card (not shown). The operations of the quick return mirror 106 and the sub mirror 107 are controlled by the control circuit 100.

  The camera according to the embodiment described above is provided with an MF / AF changeover switch (not shown). By operating this, the photographer can select either the MF mode or the AF mode as the focus adjustment mode. The MF mode is a manual focus adjustment mode. When this focus adjustment mode is selected, the focus adjustment of the photographing lenses 201a to 201c is performed by a manual operation of the photographer. On the other hand, the AF mode is an automatic focus adjustment mode. When this focus adjustment mode is selected, the focus adjustment of the photographing lenses 201a to 201c is automatically performed by the camera.

  In addition, the camera according to the present embodiment includes an AF mode switching switch (not shown). By operating this, the photographer can further set the AF mode to either the single AF (AF-S) mode or the continuous AF (AF-C) mode. In the AF-S mode, when the photographer presses the release button halfway when acquiring a captured image, the focus of the photographing lens is adjusted, and after focusing, the focus is fixed. In the AF-C mode, the focus is repeatedly adjusted even after focusing, and when the subject moves while the release button is pressed halfway, the focus is continuously adjusted according to the movement. Note that the AF-S mode and the AF-C mode may be automatically switched according to the movement of the subject without the photographer operating the AF mode switch.

  The MF / AF changeover switch and the AF mode changeover switch described above are not limited to mechanical switches. For example, it may be switched on the menu screen.

  A rear view of the camera described above is shown in FIG. A liquid crystal display (LCD) 112, a live view execution switch 113, and a switch group 114 are provided on the back surface of the camera body 1, in addition to the eyepiece 111 described above. The LCD 112 displays various screens according to the photographer's operation. For example, a menu screen or a captured image recorded on a memory card is displayed on the LCD 112. In live view display, the image of the subject is displayed on the LCD 112 as described above.

  The live view execution switch 113 is a switch for performing live view display. When this switch is operated by the photographer to instruct image display, the quick return mirror 106 and the sub mirror 107 are retracted from the optical path as described above, and the subject image acquired by the image sensor 105 is displayed on the LCD 112. To display live view.

  The switch group 114 is a switch for executing various operations other than the live view display. For example, a playback button for displaying a recorded captured image, a delete button for deleting the captured image, a menu screen Menu buttons, cursor keys, etc. are displayed. Since the switches included in the switch group 114 are not directly related to the present invention, detailed description thereof is omitted.

  As shown in FIG. 3A, eleven focus detection areas a to k are set in the image plane of incident light beams from the photographing lenses 201a to 201c. The focus detection areas a to k are displayed so as to overlap the subject image in the viewfinder. In live view display, the image can be displayed over the subject on the LCD 112.

  When adjusting the focus of the photographing lenses 201a to 201c, one of the focus detection areas a to k is selected. Then, one of the defocus amounts corresponding to the selected focus detection area is selected from the plurality of defocus amounts detected in each focus detection area. The photographing lenses 201a to 201c are brought into focus by adjusting the focus of the photographing lenses 201a to 201c based on the defocus amount thus selected. Therefore, the focus detection area selected when the photographing lenses 201a to 201c are brought into focus is hereinafter also referred to as a focus area.

  The focus detection area can be selected manually by the photographer. Alternatively, the optimum focus detection area can be automatically selected in the camera according to the shooting situation. For example, a focus detection area for detecting a defocus amount indicating the closest side is automatically selected. Regardless of which method is used to select the focus detection area, a frame is displayed around the focus detection area. FIG. 3B shows an example in which all the focus detection areas a to k are displayed surrounded by a frame. In practice, only the periphery of the selected focus detection area is surrounded by a frame. In live view display, it is also possible to display only the frame of the selected focus detection area on the subject image without displaying the focus detection areas a to k.

  Next, processing when performing live view display will be described. FIG. 4 shows a flowchart of live view display. This flowchart is started in the control circuit 100 when the camera body 1 is powered on.

  In step S101, it is determined whether or not the photographer has instructed live view display by operating the live view execution switch 113. When the live view execution switch 113 is operated to instruct live view display, the process proceeds to the next step S102. In step S102, phase difference AF is performed. At this time, by the quick return mirror 106 and the sub mirror 107 placed on the optical path, the incident light beams from the photographing lenses 201a to 201c are guided to the phase difference AF detection device 101, and the defocus amount corresponding to each focus detection area is obtained. . Then, based on the defocus amount obtained for the selected focus detection area, the focus detection calculation unit 103 performs focus adjustment of the photographing lenses 201a to 201c.

  In step S103, the operations of the quick return mirror 106 and the sub mirror 107 are controlled to be retracted from the optical path. As a result, incident light beams from the photographing lenses 201 a to 201 c are guided to the image sensor 105. In the next step S104, live view display is turned on, and the image of the subject acquired by the image sensor 105 is displayed on the LCD 112.

  Note that the processing in steps S102 to S104 described above is performed regardless of the setting state of the focus adjustment mode. That is, even when the camera is in the MF mode or AF-S mode, the live view execution switch 113 is operated by the photographer to instruct live view display. In this case, the setting of the focus detection calculation unit 103 is changed so that the focus of the photographing lenses 201a to 201c is adjusted by the phase difference AF in step S102. Thereafter, in step S103, incident light beams from the photographing lenses 201a to 201c are guided to the image sensor 105, and an image of the subject is displayed on the LCD 112 in step S104.

  In step S105, focus determination is performed based on the result of the phase difference AF in step S102. If the focus adjustment of the photographing lenses 201a to 201c is appropriately performed in step S102, it is determined that the in-focus state is achieved, and the process proceeds to step S106. On the other hand, if the defocus amount cannot be calculated correctly in step S102 and focus adjustment is not performed appropriately, it is determined that the subject is out of focus and the process proceeds to step S107.

  If it is determined in step S105 that the subject is in focus, in step S106, the focus detection area selected in the phase difference AF in step S102, that is, the focus detection area selected in step S102, is displayed on the image of the subject. . An example of the display screen of the LCD 112 at this time is shown in FIG. In the screen example of FIG. 5, among the focus detection areas a to k, focus detection areas i, j, and k at positions corresponding to the person 300 closest to the subject are displayed as the focus areas. Yes.

  On the other hand, if it is determined in step S105 that the image is out of focus, in step S107, the LCD 112 displays that the image is out of focus. A display screen example of the LCD 112 at this time is shown in FIG. In the screen example of FIG. 6, all the focus detection areas a to k are displayed in a blinking manner, thereby indicating that the focus is not achieved.

  In step S108, an initial position of the focus detection area for executing contrast AF is set, and the set initial position is displayed on the LCD 112. An example of the display screen at this time is shown in FIG. FIG. 7A shows an example of a screen when it is determined in step S105 that the focus state is achieved. FIG. 7A shows an example of a screen when it is determined that the focus detection area i is optimal as the initial position among the focus areas i, j, and k described above. At this time, for example, the focus detection area indicating the closest defocus amount in the in-focus area is determined to be the optimum focus detection area as the initial position. On the other hand, FIG. 7B is an example of a screen when it is determined in step S105 that the camera is out of focus. In this screen example, the focus detection area f located at the center is set as the initial position.

  In step S109, contrast AF is performed based on the image of the subject acquired by the image sensor 105. At this time, the focus adjustment state of the photographing lenses 201a to 201c is detected based on the state in which the focus adjustment by the phase difference AF is performed in step S102, and the focus adjustment by the contrast AF is performed. Specifically, the focus adjustment lens 201b is moved back and forth by a predetermined width from the position determined in step S102, and the change in the contrast of the image generated in the focus detection area set as the initial position at that time is changed to the focus in the contrast calculation unit 104. Calculated as change in evaluation value. Then, the focus adjustment of the photographing lenses 201a to 201c is performed based on the obtained change in focus evaluation value, that is, the change in contrast. Accordingly, after performing the focus adjustment by the phase difference AF in step S102, the focus adjustment by the contrast AF is further performed.

  If the process of step S101-S109 demonstrated above is performed, the flowchart of FIG. 4 will be complete | finished.

  In addition, when displaying the focus area of phase difference AF in step S106, it is good also as displaying with the form different from having demonstrated with the example of a screen of FIG. Examples thereof are shown in FIGS. FIG. 8 shows an example in which only the in-focus area i determined to be optimal among the in-focus areas i, j, and k is displayed with a frame surrounded by a frame, for example, for indicating the closest defocus amount. ing. On the other hand, FIG. 9 shows an example in which the frame for the focusing area i determined to be optimal and the frames for the other focusing areas j and k are displayed in different display forms. In FIGS. 8 and 9, the vicinity of the person 300 is shown enlarged so that the display contents can be easily understood.

  In addition, the display method of the focus area demonstrated so far, and the display method which shows that it is out of focus is an example to the last. Therefore, various display methods can be used in addition to the contents described.

According to the embodiment described above, the following operational effects can be achieved.
(1) When the live view execution switch 113 is operated by the photographer and a live view display instruction, that is, an instruction to display a subject image by the LCD 112 is made (step S101), the focus detection calculation unit 103 causes the photographing lens 201a to operate. The focus adjustment of .about.201c is performed by phase difference AF (step S102), and the image obtained in that state is displayed on the LCD 112 (step S104). Since it did in this way, it can prevent that a blur image is displayed in the case of a live view display.

(2) When the live view execution switch 113 is operated and the live view display is instructed in the state where the MF mode for performing the focus adjustment by manual operation is set, the phase difference AF is detected and detected. The setting of the focus detection calculation unit 103 is changed so that the focus adjustment based on the defocus amount is performed. Since this is done, it is possible to prevent the out-of-focus image from being displayed during live view display regardless of the setting state of the focus adjustment mode.

(3) When performing focus adjustment by phase difference AF in step S102, a plurality of defocus amounts in focus detection areas a to k corresponding to a plurality of positions in the screen by the photographing lens are detected, and the plurality of defocus amounts are detected. Select one of the defocus amounts from the defocus amount. Then, an image of the subject obtained in a state where the focus is adjusted based on the selected defocus amount is displayed on the LCD 112 in step S104. Since it did in this way, even if there are various subjects with different distances from the camera, it is possible to perform live view display with appropriate focus adjustment.

(4) The LCD 112 displays the focus detection area at the position where the defocus amount selected in the phase difference AF performed in step S102 is detected as a focus area in the live view display (step S102). S106). Since this is done, it is possible to inform the photographer of which position in the screen is focused on during live view display.

(5) The focus adjustment state of the photographing lenses 201a to 201c is detected with reference to the state in which the focus adjustment by the phase difference AF is performed in step S102, and the focus adjustment by the contrast AF is further performed (step S109). Since it did in this way, the focus of the image displayed at the time of live view display can be adjusted more correctly and quickly.

-Second Embodiment-
Next, a single-lens reflex digital camera equipped with a focus adjustment apparatus according to a second embodiment of the present invention will be described below. In addition to the configuration of the camera according to the first embodiment shown in the block diagram of FIG. 1, the camera of this embodiment further has a mechanism for detecting whether or not the photographer has looked into the eyepiece 111. . Such a detection mechanism is realized, for example, by providing a sensor for detecting the contact of the face in the eyepiece 111 or by providing a sensor for detecting reflected light from the eyeball in the viewfinder. In addition to this, it is possible to detect whether or not the photographer has looked into the eyepiece 111 by various methods.

  FIG. 10 shows a flowchart of processing executed when live view display is performed in the camera of this embodiment. In this flowchart, the same steps as those in the flowchart executed in the first embodiment shown in FIG. 4 are denoted by the same step numbers. A description of the processing of the same step number will be omitted below.

  In step S301, it is determined whether the photographer has looked into the eyepiece 111 based on the detection result obtained by the detection mechanism as described above. If it is detected that the photographer has looked into the eyepiece 111, the process proceeds to step S302. If not detected, the process proceeds to step S303.

  When the process proceeds to step S302, in step S302, phase difference AF is performed according to camera settings. In this case, the focus adjustment of the photographing lenses 201a to 201c is performed based on the defocus amount of the focus detection area designated in advance in the camera. The focus detection area designated in advance here corresponds to the focus detection area when the photographer has manually selected the focus detection area. If the focus detection area is set to be automatically selected, a focus detection area that matches a predetermined selection condition is applicable. For example, as described above, the focus detection area that overlaps with the subject located closest to the front corresponds to this. By executing step S302, when the photographer instructs live view display while looking into the eyepiece 111, the subject image can be displayed in live view in the same focus state as the viewfinder image. .

  On the other hand, when the process proceeds to step S303, in step S303, phase difference AF by automatic selection is performed. In this case, similarly to the case where the focus detection area is set to be automatically selected in step S302 described above, the defocus amount of the focus detection area that matches a predetermined selection condition is selected. Then, the focus adjustment of the photographing lenses 201a to 201c is performed based on the selected defocus amount.

  When either step S302 or S303 described above is executed, the process proceeds to step S103. In step S103 and subsequent steps, processing similar to that described in FIG. 4 is executed. When all the processes are executed, the flowchart of FIG.

  According to the second embodiment described above, it is detected whether or not the photographer has looked into the eyepiece 111. When the live view execution switch 113 is operated and a live view display instruction is given in a state where it is detected that the photographer does not look into the eyepiece unit 111, phase difference AF by automatic selection is performed. (Step S303). At this time, a plurality of defocus amounts in each focus detection area are detected, one of the defocus amounts is selected, and the focus of the photographing lenses 201a to 201c is selected based on the selected defocus amount. Make adjustments. The subject image obtained in this state is displayed on the LCD 112 in step S104. Since this is done, it is possible to prevent the out-of-focus image from being displayed even when the photographer performs live view display without looking at the viewfinder image.

  In each of the embodiments described above, contrast AF is always performed after performing phase difference AF during live view display. However, contrast AF may be omitted by performing only phase difference AF. Good. Further, in that case, the present invention can be applied to a camera that performs only phase difference AF. Alternatively, a camera that performs only contrast AF instead of phase difference AF during live view display may be used.

  Further, in each of the embodiments described above, an example in which a live view display instruction is performed by operating the live view execution switch 113 provided on the back surface of the camera body 1 has been described. However, the present invention is not limited to this, and it is possible to instruct live view display according to various operations such as operation of a shutter button, setting operation on a menu screen, and power-on.

  In each of the embodiments described above, the lens barrel has been described as a replaceable camera. However, the present invention is not limited to this and may be a lens-integrated camera.

  Each embodiment and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired. Other aspects conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

It is a block diagram of the camera which incorporated the focus adjustment apparatus of this invention. It is a rear view of the camera which incorporated the focus adjustment apparatus of this invention. It is a figure which shows a focus detection area. It is a flowchart of the process performed when performing live view display in the 1st Embodiment of this invention. It is a figure which shows the example of a display screen when a focus area is displayed on the image of a to-be-photographed object. It is a figure which shows the example of a display screen when it is out of focus. It is a figure which shows the example of a display screen when the initial position of a focus detection area is displayed. It is a figure which shows the example of a display screen when only the focusing area judged to be optimal is enclosed and displayed. It is a figure which shows the example of a display screen when displaying the frame with respect to the focusing area determined to be optimal, and the frame with respect to the other focusing area by a different display form. It is a flowchart of the process performed when performing live view display in the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Camera body, 2: Lens barrel, 100: Control circuit, 101: Phase difference AF detection element, 102: AF-CCD control part, 103: Focus detection calculation part, 104: Contrast calculation part, 105: Imaging element, 106: Quick return mirror, 107: Sub mirror, 108: Viewfinder screen, 109: Penta prism, 110: Eyepiece, 111: Eyepiece, 112: Liquid crystal display, 113: Live view execution switch, 114: Switch group, 201a- 201c: photographing lens, 202: AF drive motor, 203: diaphragm member

Claims (6)

Display means capable of displaying an image obtained by taking an image with a taking lens;
Display instruction means for instructing display of the image by the display means;
Focus adjustment control means for detecting a focus adjustment state of the photographing lens and performing focus adjustment of the photographing lens based on the focus adjustment state;
When the display instruction means instructs the display of the image, the focus adjustment control means adjusts the focus of the photographing lens, and the display means displays the image obtained in the state of the focus adjustment. An image pickup apparatus comprising a control means for displaying on the display. The imaging apparatus according to claim 1,
The focus adjustment control means can be set so as to adjust the focus of the photographing lens by manual operation regardless of the focus adjustment state,
The control means is set to the focus adjustment state when the display instruction means is instructed to display the image while the focus adjustment control means is set to perform the focus adjustment by the manual operation. An image pickup apparatus, wherein the setting of the focus adjustment control means is changed so as to perform focus adjustment based on the image pickup apparatus. The imaging device according to claim 1 or 2,
The focus adjustment control means can detect a plurality of the focus adjustment states at a plurality of positions in the screen by the photographing lens and select any one of the focus adjustment states from the plurality of focus adjustment states.
The control means displays on the display means the image obtained in a state in which the focus adjustment is performed based on a focus adjustment state selected from the plurality of focus adjustment states by the focus adjustment control means. An imaging device. The imaging device according to claim 3.
An eyepiece for observing an image by the taking lens;
A detection unit that detects whether or not a photographer has looked into the eyepiece unit,
The control means detects the plurality of focus adjustments when an instruction to display the image is given by the display instruction means in a state in which a photographer does not look into the eyepiece by the detection section. An image pickup apparatus, wherein the image obtained in a state where the focus adjustment is performed based on a focus adjustment state selected from the states is displayed on the display means. In the imaging device according to claim 3 or 4,
The image display apparatus, wherein the display unit displays a position where a focus adjustment state selected by the focus adjustment control unit is detected among a plurality of positions in the screen by the photographing lens. In the imaging device according to any one of claims 1 to 5,
A second focus adjustment control unit configured to detect a focus adjustment state of the photographing lens based on a value related to a contrast of the image;
The imaging apparatus according to claim 2, wherein the second focus adjustment control unit detects the focus adjustment state based on a state in which the focus adjustment is performed by the focus adjustment control unit.

Images