JP5347269B2 - Imaging device - Google Patents

Description

  The present invention relates to an imaging apparatus and a method for controlling the imaging apparatus.

  2. Description of the Related Art Conventionally, a first state that enables observation of an object by a finder optical system and focus detection by a focus detection unit, and a second state that enables observation of an object by an image display means and focus detection by a focus detection unit There is known a camera that switches between (see Patent Document 1).

Japanese Patent No. 3697256

  In the camera disclosed in Patent Document 1, when a subject image is captured and a process based on the captured image is executed, the user can always observe the subject image using an observation optical system such as an optical viewfinder. I can't.

The image pickup apparatus according to the first aspect of the present invention can be switched to the first state arranged in the photographing optical path or the second state retracted from the photographing optical path. The first mirror that divides the light into reflected light and transmitted light can be switched to the third state that is arranged in the photographing optical path, or the fourth state that is retracted from the photographing optical path. A second mirror that reflects the transmitted light transmitted through the first mirror; and the reflected light is incident when the first mirror is in the first state; and the subject when the first mirror is in the second state. A finder in which a light beam from the first mirror is not incident, and the transmitted light transmitted through the first mirror when the first mirror is in the first state and the second mirror is in the fourth state; The first mirror is the first mirror And when the second mirror is in the fourth state, the light beam from the subject is received, the first mirror is in the first state, and the second mirror is in the third state. An imaging device that does not receive the transmitted light and the light flux from the subject, and a control unit that controls the first mirror and the second mirror, the control unit before the half-press operation In addition, after the first mirror and the second mirror are controlled so that the first mirror is in the first state and the second mirror is in the fourth state, The first mirror and the second mirror are controlled so that one mirror is in the first state and the second mirror is in the third state, and the first mirror is moved to the first state. In the second state, the second mirror is in the fourth shape. And controlling said first mirror and said second mirror such that.
The imaging device according to the invention of claim 4 can be switched to the first state arranged in the photographing optical path or the second state retracted from the photographing optical path, and when in the first state, the light flux from the subject is changed. The first mirror that divides the light into reflected light and transmitted light can be switched to the third state that is arranged in the photographing optical path, or the fourth state that is retracted from the photographing optical path. A second mirror that divides the transmitted light transmitted through the first mirror into reflected light and transmitted light; and the reflected light is incident when the first mirror is in the first state; A finder in which a light beam from the subject is not incident when in the second state, the first mirror is in the first state, and the second mirror is transmitted through the first mirror when in the fourth state Receiving the transmitted light, When the mirror is in the second state and the second mirror is in the fourth state, the light beam from the subject is received, the first mirror is in the first state, and the second mirror An image sensor that receives the transmitted light that has passed through the first mirror and the second mirror, and a control unit that controls the first mirror and the second mirror, The control unit controls the first mirror and the second mirror so that the first mirror is in the first state and the second mirror is in the fourth state before being half-pressed. After the half-pressing operation is performed, the first mirror and the second mirror are controlled so that the first mirror is in the first state and the second mirror is in the third state, and the full-pressing operation is performed. After the first mirror is in the second state Ri, wherein the second mirror is to control the first mirror and the second mirror such that the fourth condition.

  According to the present invention, when a subject image is captured and a process based on the captured image is executed, the user can always observe the subject image using the observation optical system.

-First embodiment-
FIG. 1 is a configuration diagram of a camera 1 according to an embodiment of the present invention. A camera 1 shown in FIG. 1 includes a photographing lens 2, a main mirror 3, a sub mirror 4, a pentaprism 5, an eyepiece lens 6, an eyepiece shutter 7, a light receiving element 8, a focus detection device 9, an image sensor 10, a control device 11, and a rear liquid crystal. A display 12 and a lens driving device 13 are provided.

  The main mirror 3 and the sub mirror 4 are arranged in the optical path of the light beam incident from the photographing lens 2 constituting the imaging optical system. The main mirror 3 is a half mirror that transmits part of the light beam from the photographing lens 2 and reflects the other light beam to the pentaprism 5. The main mirror 3 can be retracted from the optical path of the light flux through the photographing lens 2 by changing its position in accordance with the control of the control device 11. On the other hand, the sub mirror 4 is a normal mirror, and reflects the light beam transmitted through the main mirror 3 and guides it to the focus detection device 9. The sub mirror 4 is disposed so as to be able to advance and retreat in the optical path of the light beam from the photographing lens 2 independently of the main mirror 3 by changing its position according to the control of the control device 11.

  The pentaprism 5 guides the light beam reflected by the main mirror 3 to the eyepiece 6. The eyepiece 6 forms an image based on the light beam reflected by the main mirror 3 and guided by the pentaprism 5 and presents it to the photographer as a viewfinder image. In other words, the pentaprism 5 and the eyepiece 6 allow the photographer to observe an image formed by the light beam that has been incident through the photographing lens 2 and reflected by the main mirror 3. The eyepiece shutter 7 is controlled to be opened and closed under the control of the control device 11. At the time of shooting, the eyepiece shutter 7 is closed by the control device 11 in order to prevent unnecessary light from the eyepiece 6 from entering the image sensor 10.

  Further, the pentaprism 5 guides a part of the light beam reflected by the main mirror 3 to the light receiving element 8. The light receiving element 8 receives the light beam reflected by the main mirror 3 and guided by the pentaprism 5 through an optical member such as a prism or a lens, and outputs a light reception signal corresponding to the light intensity to the control device 11.

  The focus detection device 9 includes a focus detection optical system for forming a pair of subject images for each of a plurality of focus detection areas set in advance in the image plane by the photographing lens 2, and a pair of formed subject images. And a pair of line sensors for detecting the light intensity. When the focus detection device 9 receives the light beam reflected by the sub mirror 4, the focus detection device 9 controls a light reception signal (focus detection signal) corresponding to the light intensity of the subject image detected by the line sensor in each focus detection area. Output to the device 11.

  The image sensor 10 receives a light beam from the photographing lens 2, captures an image from the photographing lens 2, and outputs an imaging signal to the control device 11. Note that the submirror 4 is retracted from the optical path when imaging is performed by the imaging element 10. On the other hand, since the main mirror 3 is a half mirror, it may not be retracted from the optical path during imaging.

  The control device 11 controls the operation of the main mirror 3 and the sub mirror 4, and also receives the light reception signal output from the light receiving element 8, the focus detection signal output from the focus detection device 9, and the image pickup signal output from the image sensor 10. Based on the above, various processes are performed. Specific processing contents will be described later.

  The rear liquid crystal display 12 operates according to the control of the control device 11 and displays various images such as a captured image. Note that a subject image can be captured by the image sensor 10 before the release button (not shown) is fully pressed by the photographer, and the obtained captured image can be displayed on the rear liquid crystal display 12 in real time. Such display of the captured image is called live view.

  The lens driving device 13 drives the photographing lens 2 in accordance with the control of the control device 11 and adjusts the focus of the photographing lens 2. The taking lens 2 and the lens driving device 13 are stored in the lens unit of the camera 1, and the other components are stored in the main body unit of the camera 1. The lens unit is detachable from the main body unit.

  Next, operations performed by the camera 1 of the present embodiment will be described. The camera 1 can switch between three types of modes according to the operation state by changing the positions of the main mirror 3 and the sub mirror 4 under the control of the control device 11. FIG. 1 shows the state of the first mode. In the first mode, both the main mirror 3 and the sub mirror 4 are disposed in the optical path of the light beam from the photographing lens 2.

  In the first mode, as described above, a part of the light beam from the photographing lens 2 is reflected by the main mirror 3 and guided to the eyepiece lens 6. As a result, the photographer can observe the image by the photographing lens 2 with the viewfinder. In this state, when the light receiving element 8 receives the light flux from the photographing lens 2 reflected by the main mirror 3, a light reception signal is output from the light receiving element 8 to the control device 11. The control device 11 performs a predetermined process based on the light beam received by the light receiving element 8 using the light reception signal output from the light receiving element 8 in this way. For example, at least one of a photometric process for detecting the light flux for detecting brightness and an image analyzing process for detecting the position of the main subject and the shooting scene is performed.

  Further, in the first mode shown in FIG. 1, the light beam transmitted through the main mirror 3 out of the light beam from the photographing lens 2 is reflected by the sub mirror 4 and guided to the focus detection device 9. When this light beam is received by the focus detection device 9, a focus detection signal is output from the focus detection device 9 to the control device 11. The control device 11 performs focus detection processing based on the light beam received by the focus detection device 9 using the focus detection signal output from the focus detection device 9 in this manner, and detects the focus adjustment state of the photographing lens 2. Based on this result, the control device 11 controls the lens driving device 13 to adjust the focus of the photographing lens 2.

  In the focus detection process performed by the control device 11 using the focus detection signal, one of the focus detection areas is set as the focus target area in accordance with the photographer's instruction or the image analysis process result. Then, the shift amount of the pair of subject images corresponding to the set focus target area is obtained based on the focus detection signal output from the focus detection device 9. From this deviation amount, a defocus amount indicating the focus adjustment state of the photographic lens 2, specifically, a deviation amount between the planned focal plane and the imaging plane and a defocus amount indicating the direction thereof are obtained. Such a focus detection processing method is called a pupil division phase difference detection method.

  Next, the second mode will be described. FIG. 2 shows the state of the second mode. In the second mode, the main mirror 3 is disposed in the optical path of the light beam from the photographic lens 2, but the sub mirror 4 is retracted from the optical path.

  In the second mode, as in the first mode described above, the light beam from the photographing lens 2 is reflected by the main mirror 3 and guided to the eyepiece lens 6 so that the photographer can observe the image by the photographing lens 2 with the viewfinder. It becomes. At this time, similarly to the first mode, a light reception signal may be output from the light receiving element 8 to the control device 11, and processing based on the light reception signal may be executed in the control device 11. Alternatively, the processing based on the light reception signal from the light receiving element 8 may not be executed in the control device 11.

  In the second mode shown in FIG. 2, since the sub mirror 4 is retracted from the optical path, the light beam transmitted through the main mirror 3 out of the light beam from the photographing lens 2 is guided to the image sensor 10 without being reflected. When the image sensor 10 receives this light beam, an image by the imaging lens 2 is captured by the image sensor 10 via the main mirror 3, and an image signal is output from the image sensor 10 to the control device 11.

  The control device 11 performs a predetermined process based on an image captured by the image sensor 10 using the image signal output from the image sensor 10. For example, light beam photometric processing for detecting brightness, focus detection processing for detecting the focus adjustment state of the taking lens 2, image analysis processing for detecting the position of the main subject and the shooting scene, etc. At least one process is performed. Further, the live view display described above may be performed on the rear liquid crystal display 12. Note that the focus detection process performed at this time is performed by obtaining a focus evaluation value corresponding to the contrast of the image captured by the image sensor 10 while changing the focus adjustment state of the photographic lens 2. Such a focus detection processing method is called a contrast detection method.

  Finally, the third mode will be described. FIG. 3 shows the state of the third mode. In the third mode, both the main mirror 3 and the sub mirror 4 are retracted from the optical path of the light beam from the photographing lens 2.

  In the third mode, unlike the first mode and the second mode described above, since the light flux from the photographing lens 2 is not reflected by the main mirror 3, the image by the photographing lens 2 cannot be observed with the viewfinder. Further, since the light beam from the photographic lens 2 is not received by the light receiving element 8, the processing based on the light reception signal from the light receiving element 8 cannot be executed in the control device 11.

  In the third mode shown in FIG. 3, since the main mirror 3 and the sub mirror 4 are both retracted from the optical path, the light flux from the photographing lens 2 is directly guided to the image sensor 10. When this light beam is received by the image pickup device 10 and an image is taken by the photographing lens 2, an image pickup signal is output from the image pickup device 10 to the control device 11. The control device 11 can perform the same processing as in the above-described second mode by using the imaging signal output from the imaging element 10 in this way. Furthermore, since the light flux from the photographing lens 2 is directly guided to the image sensor 10, it is also suitable for acquiring a real photographed image, that is, a captured image to be recorded on a memory card (not shown).

  When the second mode and the third mode are compared, the light flux from the photographic lens 2 reaches the image sensor 10 after passing through the main mirror 3 in the second mode, whereas in the third mode. The light beam from the photographing lens 2 reaches the image sensor 10 directly without passing through the main mirror 3. Therefore, in the second mode and the third mode, the optical path length difference of the light flux is generated by the main mirror 3. In order to remove the influence of such an optical path length difference, correction is performed on the processing result in the second mode. That is, the control device 11 corrects the result of the processing in the state where the main mirror 3 is disposed in the optical path in the second mode, based on the optical path length difference of the light beam generated by the main mirror 3.

  As described above, in the first mode and the second mode, various processes are performed by the control device 11 while the photographer can observe the viewfinder image. Therefore, the photographer can obtain a feeling of use equivalent to that of a conventional single-lens reflex camera.

  In the first mode, the light beam from the photographing lens 2 is received by the light receiving element 8 and the focus detection device 9. Based on the light beam thus received, the control device 11 performs a light metering process, a focus detection process, an image analysis process, and the like. Therefore, power consumption can be reduced as compared with other modes using the image sensor 10. In addition, since focus detection processing is performed using the pupil division phase difference detection method, high-speed focus adjustment is possible.

  On the other hand, in the second mode or the third mode, an image by the light flux from the photographing lens 2 is captured by the image sensor 10. The control device 11 performs the above processing based on the image thus captured. In general, the imaging element 10 has a larger number of pixels than the light receiving element 8 and the line sensor of the focus detection device 9, so that an image having a higher resolution than these can be obtained. Therefore, it is possible to perform processing with higher accuracy than in the first mode.

  Further, in the third mode, the light beam from the photographic lens 2 is directly guided to the image sensor 10 without passing through the main mirror 3, so that an image by the photographic lens 2 is larger in the image sensor 10 than in the second mode. An image can be taken. Therefore, even when the brightness of the image by the photographing lens 2 is low, highly accurate processing can be performed, and imaging can be performed without impairing the original texture of the image.

  The camera 1 can continuously switch between the above modes during the photographing operation. For example, before the release button is half-pressed by the photographer, the mode is switched to the second mode, and the light beam photometry processing and image analysis processing based on the image captured by the image sensor 10 are performed. When the release button is pressed halfway, the mode is switched to the first mode to perform photometric processing of the light beam based on the light beam received by the light receiving element 8 and image analysis processing, and to the light beam received by the focus detection device 9. Based on the focus detection process. When the release button is fully pressed, the mode is switched to the third mode, and an image captured by the image sensor 10 is recorded as a captured image.

  Note that switching between the first mode and the second mode is performed by changing the position of the sub mirror 4 in accordance with the control of the control device 11. That is, the control device 11 changes the position of the sub-mirror 4 to perform processing based on the image picked up by the image pickup device 10 and the light reception signal output from the light receiving device 8 or the focus detection signal output from the focus detection device 9. It functions as a selection means for causing the control device 11 to selectively perform processing based on the above. The switching between the second mode and the third mode is performed by changing the position of the main mirror 3 in accordance with the control of the control device 11.

According to 1st Embodiment described above, there exists the following effect.
(1) The camera 1 is arranged in an optical path of a light beam from the photographing lens 2 and an image sensor 10 that receives a light beam from the photographing lens 2 that is an imaging optical system and picks up an image by the photographing lens 2. A main mirror 3 that transmits a part of the light beam to the image sensor 10 and reflects the other of the light beam, a pentaprism 5 that enables the photographer to observe an image of the light beam reflected by the main mirror 3 as a viewfinder image, and an eyepiece A lens 6 and a control device 11 are provided. In the second mode, the control device 11 performs a predetermined process based on an image captured by the image sensor 10 via the main mirror 3 in a state where the finder image can be observed by the pentaprism 5 and the eyepiece 6. Since it did in this way, in the state which a user can observe a subject image using the pentaprism 5 and eyepiece 6 which are observation optical systems, the subject image is imaged, and processing based on the captured image is performed by the control device 11. Can be executed in

(2) In the second mode, the control device 11 performs photometry and photographing of the light flux from the photographing lens 2 based on the image picked up by the image pickup device 10 in a state where the finder image can be observed by the pentaprism 5 and the eyepiece 6. At least one process of detecting the focus adjustment state of the lens 2 and analyzing the image by the photographing lens 2 is performed. Since it did in this way, a highly accurate process can be performed based on an image with high resolution.

(3) In the first mode, the light receiving element 8 receives the light beam from the photographing lens 2 reflected by the main mirror 3, and the control device 11 performs processing based on the light beam received by the light receiving element 8. Since it did in this way, various processes can be performed, reducing power consumption.

(4) In the third mode, the control device 11 performs processing based on the light beam received by the image sensor 10 while the main mirror 3 is retracted from the optical path of the light beam from the photographing lens 2. Since it did in this way, even if it is a case where the brightness | luminance of the image by the photographic lens 2 is low, while being able to perform a highly accurate process, it can image without impairing the original texture of an image.

(5) In the second mode, the control device 11 corrects the processing result in a state in which the main mirror 3 is disposed in the optical path, based on the optical path length difference of the light beam generated by the main mirror 3. Since it did in this way, the influence on the processing result by the optical path length difference can be removed, and the correct processing result can be obtained.

(6) In the first mode or the second mode, the control device 11 determines the focus adjustment state of the photographic lens 2 based on the light beam from the photographic lens 2 that has passed through the main mirror 3. That is, in the first mode, the light beam from the photographing lens 2 that has been transmitted through the main mirror 3 and reflected by the sub-mirror 4 is received by the focus detection device 9, and a focus detection signal is output from the focus detection device 9 to the control device 11. . Based on this focus detection signal, the control device 11 performs focus detection processing by the pupil division phase difference detection method to obtain the focus adjustment state of the photographic lens 2. On the other hand, in the second mode, the image sensor 10 receives the light beam from the photographing lens 2 that has passed through the main mirror 3, and outputs an image signal from the image sensor 10 to the control device 11. Based on this imaging signal, the control device 11 performs a focus detection process by a contrast detection method to obtain the focus adjustment state of the photographing lens 2. Since it did in this way, focus adjustment of the photographic lens 2 can be performed in the state which can observe a finder image.

(7) The camera 1 is arranged so as to be able to advance and retreat in the optical path of the light beam from the photographic lens 2 independently of the main mirror 3, and is a sub-mirror that reflects the light beam transmitted through the main mirror 3 while being positioned in the optical path. 4 and a focus detection device 9 that receives the light beam reflected by the sub mirror 4 and outputs a focus detection signal that is a light reception signal. In the switching between the first mode and the second mode, the control device 11 changes the position of the sub-mirror 4 to the processing based on the image captured by the image sensor 10 and the focus detection signal output from the focus detection device 9. The control device 11 itself selectively performs the processing based on it. Since it did in this way, according to the operation state of the camera 1, a 1st mode and a 2nd mode can be switched quickly and an appropriate process can be performed in each mode.

-Second Embodiment-
Next, another embodiment of the present invention will be described. FIG. 4 is a configuration diagram of the camera 1A according to the present embodiment. This camera 1A has the same configuration as the camera 1 according to the first embodiment shown in FIG. 1 except for the sub mirror 4A. Unlike the sub mirror 4 of the camera 1 in FIG. 1, the sub mirror 4A is a half mirror that reflects a part of the light beam from the photographing lens 2 and passes the other.

  The camera 1A according to the present embodiment can switch between the first mode, the second mode, and the third mode in accordance with the operating state, similarly to the camera 1 described above. In the first mode, as shown in FIG. 4, the main mirror 3 and the sub mirror 4 </ b> A are both arranged in the optical path of the light beam via the photographing lens 2. As a result, like the camera 1, the photographer 2 can observe the image by the photographing lens 2 with the viewfinder. Further, the light beam from the photographic lens 2 reflected by the main mirror 3 is received by the light receiving element 8, a light reception signal is output from the light receiving element 8, and the light beam from the photographic lens 2 reflected by the sub mirror 4A is focus-detected. The light is received by the device 9 and a focus detection signal is output from the focus detection device 9. Various processes are performed by the control device 11 using the light reception signal and the focus detection signal.

  Further, since the sub mirror 4A is a half mirror, the light beam transmitted through the main mirror 3 and the sub mirror 4A out of the light beam from the photographing lens 2 is guided to the image sensor 10. When the image sensor 10 receives this light beam, an image by the imaging lens 2 is captured by the image sensor 10 via the main mirror 3 and the sub mirror 4A, and an image signal is output from the image sensor 10 to the control device 11. Various processes based on the image picked up by the image pickup device 10 are performed by the control device 11 using this image pickup signal.

  Since the operation of the camera 1A in the second mode and the third mode is the same as that of the camera 1 according to the first embodiment, the description thereof is omitted.

  The camera 1 </ b> A according to the second embodiment described above includes the sub mirror 4 </ b> A that transmits a part of the light beam from the photographing lens 2. In the first mode, the image sensor 10 receives the light beam transmitted through the sub mirror 4A. Thus, the subject image can be captured in a state where the user can observe the subject image using the pentaprism 5 and the eyepiece lens 6 which are observation optical systems without retracting the sub mirror 4A from the optical path. The control device 11 can execute processing based on an image captured by the element 10 and based on the captured image.

  In each of the above-described embodiments, the example in which the focus detection process by the contrast detection method is performed when the image pickup element 2 captures an image by the imaging lens 10 is described. However, this is performed by the pupil division phase difference detection method. It may be. That is, in the imaging pixel array of the imaging element 10, focus detection pixels that receive a pair of light beams that have passed through different portions of the pupil of the photographing lens 2 are mixedly arranged, and the output of the focus detection pixels is It may be used to obtain the focus adjustment state.

  Each embodiment and modification 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 by one embodiment of this invention. It is a figure which shows the state of a 2nd mode. It is a figure which shows the state of 3rd mode. It is a block diagram of the camera by other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A: Camera 2: Shooting lens 3: Main mirror 4, 4A: Sub mirror 5: Penta prism 6: Eyepiece lens 8: Light receiving element 9: Focus detection apparatus 10: Imaging element 11: Control apparatus

Claims (6)

The first state arranged in the photographing optical path or the second state retracted from the photographing optical path can be switched, and when in the first state, the light beam from the subject is divided into reflected light and transmitted light. 1 mirror and
The second state can be switched to the third state arranged in the photographing optical path or the fourth state retracted from the photographing optical path, and reflects the transmitted light transmitted through the first mirror in the third state. Mirror,
A finder in which the reflected light is incident when the first mirror is in the first state, and a light beam from the subject is not incident when the first mirror is in the second state;
When the first mirror is in the first state and the second mirror is in the fourth state, the transmitted light transmitted through the first mirror is received, and the first mirror is in the second state. And when the second mirror is in the fourth state, the light beam from the subject is received, the first mirror is in the first state, and the second mirror is in the third state. An imaging device that does not receive the transmitted light and the luminous flux from the subject;
A control unit for controlling the first mirror and the second mirror,
The controller is
Before the half-pressing operation is performed, the first mirror and the second mirror are controlled so that the first mirror is in the first state and the second mirror is in the fourth state;
After the half-push operation is performed, the first mirror and the second mirror are controlled so that the first mirror is in the first state and the second mirror is in the third state,
The first mirror and the second mirror are controlled so that the first mirror is in the second state and the second mirror is in the fourth state after being fully pressed. Imaging device. The imaging device according to claim 1,
A photometric sensor for measuring light using the reflected light of the first mirror;
A focus detection unit that detects a focus adjustment state using the reflected light of the second mirror;
An output unit of the photometric sensor, an output of the focus detection unit, and a calculation unit that performs calculation using the output of the imaging device,
The controller is
Before the half-press operation is performed, the calculation unit is controlled to perform calculation using the output of the image sensor,
After the half-press operation is performed, the calculation unit is controlled to perform calculation using the output of the photometric sensor and the output of the focus detection unit,
An image pickup apparatus that controls the calculation unit to perform calculation using an output of the image sensor after a full-press operation is performed . The imaging device according to claim 2 ,
The controller is
Before the half-press operation is performed, the arithmetic unit is controlled to perform photometric processing and image analysis processing using the output of the imaging device,
After a half-press operation, the photometric sensor and the image analysis process are performed using the output of the photometric sensor, and the arithmetic unit is controlled to perform the focus detection process using the output of the focus detector.
An image pickup apparatus that controls the arithmetic unit so as to record an image picked up using an output of the image pickup element as a picked-up image after a full press operation . The first state arranged in the photographing optical path or the second state retracted from the photographing optical path can be switched, and when in the first state, the light beam from the subject is divided into reflected light and transmitted light. 1 mirror and
It is possible to switch to the third state arranged in the photographing optical path or the fourth state retracted from the photographing optical path, and when in the third state, the transmitted light transmitted through the first mirror is reflected and transmitted. A second mirror that splits into light;
A finder in which the reflected light is incident when the first mirror is in the first state, and a light beam from the subject is not incident when the first mirror is in the second state;
When the first mirror is in the first state and the second mirror is in the fourth state, the transmitted light transmitted through the first mirror is received, and the first mirror is in the second state. And when the second mirror is in the fourth state, the light beam from the subject is received, the first mirror is in the first state, and the second mirror is in the third state. An image sensor for receiving the transmitted light transmitted through the first mirror and the second mirror;
A control unit for controlling the first mirror and the second mirror,
The controller is
Before the half-pressing operation is performed, the first mirror and the second mirror are controlled so that the first mirror is in the first state and the second mirror is in the fourth state;
After the half-push operation is performed, the first mirror and the second mirror are controlled so that the first mirror is in the first state and the second mirror is in the third state,
The first mirror and the second mirror are controlled so that the first mirror is in the second state and the second mirror is in the fourth state after being fully pressed. Imaging device. The imaging apparatus according to claim 4,
A photometric sensor for measuring light using the reflected light of the first mirror;
A focus detection unit that detects a focus adjustment state using the reflected light of the second mirror;
An output unit of the photometric sensor, an output of the focus detection unit, and a calculation unit that performs calculation using the output of the imaging device,
The controller is
Before the half-press operation is performed, the calculation unit is controlled to perform calculation using the output of the image sensor,
After the half-press operation is performed, the calculation unit is controlled to perform calculation using the output of the photometric sensor, the output of the focus detection unit, and the output of the image sensor,
An image pickup apparatus that controls the calculation unit to perform calculation using an output of the image sensor after a full-press operation is performed . The imaging apparatus according to claim 5 ,
The controller is
Before the half-press operation is performed, the arithmetic unit is controlled to perform photometric processing and image analysis processing using the output of the imaging device,
After the half-press operation, the photometric sensor and the image analysis process are performed using the output of the photometric sensor, the focus detection process is performed using the output of the focus detection unit, and the focus is detected using the output of the image sensor. Controlling the calculation unit to perform detection processing;
An image pickup apparatus that controls the arithmetic unit so as to record an image picked up using an output of the image pickup element as a picked-up image after a full press operation .

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