JP2012008307A - Imaging apparatus and display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus and a display method, whereby usability for focusing is improved in manual focus operation.SOLUTION: A determination is made whether manual focus mode (MF mode) has been set or not (S53). If determined as the MF mode, a determination is made whether a distance ring has been manually operated or not (S59). If the distance ring is operated, a display enlarging magnification is set based on contrast information and lens information (S61 to S65). Live view display is carried out at the set display magnification (S69).

Description

  The present invention relates to an imaging device and a display method, and more particularly to an imaging device and a display method capable of manual focus.

  Conventionally, cameras having a manual focus mode are known. In this camera, by manually operating a focus adjusting member such as a distance ring provided on the photographing lens, the focus lens can be moved according to the operation direction and the operation amount, thereby performing focusing. Further, in a camera with a manual focus mode, if a live view image can be displayed on the rear liquid crystal display unit or the like, the photographer can perform manual focus while viewing the live view image.

  In such a camera with manual focus, when the screen display of the rear liquid crystal display unit is small, the degree of focus adjustment is difficult to understand, and focusing is difficult. In view of this, a camera that enlarges and displays an image in response to a manual operation of the focus adjustment member has been proposed (see Patent Document 1).

JP 2009-118515 A

  However, if the shooting lens is greatly out of focus, or if the shooting magnification is high, such as in macro shooting, even if the Live View image is enlarged and displayed unnecessarily, the subject in the screen to be focused It is difficult to understand the position and part of the subject being enlarged, and it is not easy to use.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an imaging apparatus and a display method that improve the usability of focusing when performing a manual focus operation.

  In order to achieve the above object, a photographing apparatus according to a first aspect of the present invention includes a photographing optical system for forming a light beam from a subject, and a manual for changing a focal position of the photographing optical system in accordance with an operation by a photographer. Focus adjustment means, imaging means for repeatedly acquiring an image based on the luminous flux from the subject, contrast detection means for detecting the contrast of the subject image based on the image acquired by the imaging means, and the imaging means Based on the display means for displaying an image as a live video, the optical information of the photographing optical system, and the contrast detected by the contrast detection means, the magnification of the live video displayed on the display means is determined. Display control means.

In the photographing apparatus according to a second aspect, in the first aspect, the optical information is focal length information of the photographing optical system, and the display control means includes the focal length information of the photographing optical system and the focal length information. The magnification is determined based on the contrast.
In the photographing apparatus according to a third aspect, in the first aspect, the optical information is information related to a photographing magnification of the photographing optical system, and the display control means is a photographing magnification of the photographing optical system. The magnification is determined based on the information related to the image and the contrast.

According to a fourth aspect of the present invention, in the first invention, the optical information is information related to a teleconverter mounted on the photographing optical system, and the display control means includes information related to the teleconverter. The magnification is determined based on the contrast.
In the photographing apparatus according to a fifth aspect based on the first aspect, the optical information is information regarding whether or not the photographing optical system is a macro lens, and the display control means relates to the macro lens. The magnification is determined based on the information and the contrast.

According to a sixth aspect of the present invention, in the first aspect, the display control unit is configured to display a magnification based on the optical information of the photographing optical system and the contrast detected by the contrast detection unit. And a frame display corresponding to the obtained display enlargement ratio is displayed.
According to a seventh aspect of the present invention, there is provided a photographing apparatus according to the first aspect, wherein the photographing apparatus includes a camera body and a lens unit that can be attached to and detached from the camera body. The lens unit includes the photographing optical system, The camera body has the manual focus adjustment means, the camera body has the imaging means, contrast detection means, display means, and display control means, and the lens unit and the camera body are connected by communication means. The camera body acquires the optical information via the communication means.

  In the display method according to the eighth aspect of the invention, it is determined whether or not the distance ring is manually operated. When the distance ring is operated, the display magnification is set based on the contrast information and the lens information. Live view is displayed at the set display magnification.

  According to the present invention, it is possible to provide a photographing apparatus and a display method that improve the usability of focusing when performing a manual focus operation.

1 is a block diagram illustrating an overall configuration mainly including an electric system of a digital camera according to a first embodiment of the present invention. It is a flowchart which shows the main flow of the camera main body of the digital camera in 1st Embodiment of this invention. It is a flowchart which shows the live view operation | movement of the digital camera in 1st Embodiment of this invention. It is a flowchart which shows the imaging | photography operation | movement of the digital camera in 1st Embodiment of this invention. It is a flowchart which shows the operation | movement of the display magnification setting of the digital camera in 1st Embodiment of this invention. It is a flowchart which shows the 1st modification of the operation | movement of the display magnification setting setting of the digital camera in 1st Embodiment of this invention. It is a flowchart which shows the 2nd modification of the operation | movement of the display magnification setting setting of the digital camera in 1st Embodiment of this invention. It is a flowchart which shows the 3rd modification of the operation | movement of the display magnification setting setting of the digital camera in 1st Embodiment of this invention. It is a flowchart which shows the main flow of the interchangeable lens of the digital camera in 1st Embodiment of this invention. In the digital camera concerning 1st Embodiment of this invention, it is a figure which shows a mode that it is displayed on the display part in the state which cannot focus on a to-be-photographed object. In the digital camera concerning 1st Embodiment of this invention, it is a figure which shows a mode that the object is displayed on the display part in the focused state. In the digital camera concerning 1st Embodiment of this invention, it is a figure which shows a mode that a to-be-photographed object is focused on the display part, and is displayed in the enlarged state. In the digital camera concerning 1st Embodiment of this invention, it is a figure which shows the relationship between contrast, a focal distance, and magnification. It is a figure which shows the relationship between a contrast, imaging | photography magnification, and an enlargement magnification in the 1st modification of the digital camera concerning 1st Embodiment of this invention. It is a figure which shows the relationship between contrast, a teleconverter, and an enlargement magnification in the 2nd modification of the digital camera concerning 1st Embodiment of this invention. It is a figure which shows the relationship between a contrast, a macro lens, and an expansion magnification in the 3rd modification of the digital camera concerning 1st Embodiment of this invention. It is a flowchart which shows the live view operation | movement of the digital camera in 2nd Embodiment of this invention. It is a figure which shows a mode that the frame display which shows the expansion part of a to-be-photographed object is displayed on the display part in the digital camera concerning 2nd Embodiment of this invention.

  Hereinafter, a preferred embodiment will be described using a camera to which the present invention is applied. A digital camera according to a preferred embodiment of the present invention has an imaging unit, and the imaging unit converts a subject image into image data, and based on the converted image data, a display unit arranged on the back of the main body. A live view for displaying a subject image in a live view has a display function. The photographer determines the composition and the photo opportunity by observing the live view display. Further, a distance ring for manual focus is provided in the photographing lens barrel, and it is possible to focus manually by operating this distance ring. Further, when manually focusing, the magnification ratio of the subject image on the display unit is changed according to the live view display state such as the contrast state of the photographing lens. During the release operation, image data is recorded on the recording medium. The image data recorded on the recording medium can be reproduced and displayed on the display unit when the reproduction mode is selected.

  FIG. 1 is a block diagram showing an overall configuration mainly including an electric system of a digital camera according to the first embodiment of the present invention. In the digital camera according to the present embodiment, the interchangeable lens 100 and the camera body 200 are configured separately, and the interchangeable lens 100 is detachable from a mount opening (not shown) on the front surface of the camera body 200. The subject luminous flux formed by the photographing lenses 101a and 101b in the interchangeable lens 100 (the photographing lenses 101a and 101b are collectively referred to as the photographing optical system 101) is guided into the camera body 100 through the mount opening. When the interchangeable lens 100 is attached to the camera body 200, it is electrically connected at the communication contact 300. Also, an attachment / detachment detection switch 259 is provided in the camera main body 200 and in the vicinity of the mount opening, so that the mounting state of the interchangeable lens 100 and the camera main body 200 can be detected.

  Inside the interchangeable lens 100, a photographing optical system 101 for focus adjustment and focal length adjustment, and a diaphragm 103 for adjusting the aperture amount are arranged. The photographing optical system is driven by an optical system driving mechanism 107, and the diaphragm 103 is driven by an aperture driving mechanism 109. The position of the photographing optical system 101 driven by the optical drive mechanism 107 is detected by the optical position detection mechanism 105, and the focus adjustment lens position (focus position) and focal length (zoom position) of the photographing optical system 101 can be detected. it can. A rotatable distance ring 112 is provided around the interchangeable lens 100, and the rotation direction (operation direction) and the rotation amount (operation amount) of the distance ring 112 are detected by the encoder 110.

  The optical position detection mechanism 105, the optical system drive mechanism 107, the aperture drive mechanism 109, and the encoder 110 are each connected to a lens CPU 111, and the lens CPU 111 is connected to the camera body 200 via a communication contact 300. The lens CPU 111 controls the interchangeable lens 100. The lens CPU 111 controls the optical system driving mechanism 107 to perform focusing and zoom driving, and controls the diaphragm driving mechanism 109 to perform aperture value control.

  In addition, the lens CPU 111 transmits lens information regarding the focus adjustment lens position (focus position) and the focal length detected by the optical position detection mechanism 105 to the camera body 200. In addition, an electrically rewritable nonvolatile memory in the lens CPU 111 or in the interchangeable lens 100 (not shown) includes focal length information of the interchangeable lens 100 (the shortest focal length and the longest focal length in the case of a zoom lens), an open aperture. Value, minimum aperture value, shootable distance range (including closest distance), lens color balance information, aberration information, information for AF, whether or not a macro lens, teleconverter, etc., lens information such as lens type Is remembered. Information regarding the state of the interchangeable lens 100 such as the aperture state of the aperture (whether the aperture is in the open aperture state or the aperture state) and the operation state (operation direction, operation amount) of the distance ring 112 is also lens information. The lens information is transmitted from the lens CPU 111 to the camera body 200 via the communication contact 300.

  Further, the lens CPU 111 also transmits information to the camera body 200 indicating completion of aperture stop completion or aperture opening completion by the aperture drive mechanism 109 and lens drive completion by the optical system drive mechanism 107.

  A focal plane type shutter 203 for controlling exposure time and shielding the image sensor 221 is disposed in the camera body 200 on the optical axis of the imaging optical system 101 and on the imaging optical path. The shutter 203 is driven and controlled by a shutter driving mechanism 213.

  An image sensor unit 290 is disposed behind the shutter 203. The image pickup device unit 290 is a unit in which the dustproof filter 205, the infrared cut filter 209, the optical low-pass filter 210, and the image pickup device 221 are integrally formed. The image pickup device unit 290 is integrally stored in a sealed package, and dust is contained in the package. It is configured not to invade. The image sensor unit 290 is displaced two-dimensionally in the XY plane perpendicular to the optical axis of the photographing optical system 101 by the blur correction mechanism 260.

  The blur correction mechanism 260 includes an actuator composed of a piezoelectric element drive motor or the like as a drive source, and two-dimensionally displaces the image sensor unit 290 within an XY plane perpendicular to the optical axis of the photographing optical system 101. An angular velocity sensor 297a using a gyro is disposed in the camera body 200, and an output of the angular velocity sensor 297a is connected to an angular velocity detection circuit 297b. The angular velocity sensor 297a outputs a shake signal corresponding to the shake generated in the camera body 200, and the angle side detection circuit 297b amplifies the shake signal and performs AD conversion.

  The angular velocity sensor 297a and the angular velocity detection circuit 297b constitute blur detection means 297, and the output of the angular velocity detection circuit 297b is connected to a sequence controller (hereinafter referred to as “body CPU”) 229. The body CPU 229 outputs a shake control signal that cancels out the shake of the camera body 200 based on the shake signal detected by the shake detection unit 297, and the actuator drive circuit 296 outputs to the actuator in the shake correction drive mechanism 260. A drive signal is output. As a result, the image sensor 221 is moved in a direction perpendicular to the optical axis of the imaging optical system 101, the blur applied to the camera body 200 is canceled, and an image sensor shift type camera shake correction operation for preventing image degradation is executed. .

  A dustproof filter 205 constituting the image sensor unit 290 is disposed behind the shutter 203. The dust-proof filter 205 prevents dust generated in the mount opening of the camera main body 200 and inside the main body from adhering to the image sensor 221 and the optical element, and shadows of the dust appear in the subject image, resulting in an unsightly image.

  A piezoelectric element 207 is fixed to the entire circumference or a part of the peripheral edge of the dust filter 205. The piezoelectric element 207 is connected to a dustproof filter drive circuit 211. The piezoelectric element 207 vibrates the dust filter 205 with ultrasonic waves of a predetermined frequency based on the drive signal of the dust filter drive circuit 211. As the dust filter 205 vibrates with ultrasonic waves, dust attached to the front surface of the dust filter 205 is removed.

  An infrared cut filter 209 for cutting an infrared light component from the subject light beam is disposed behind the dust-proof filter 205, and an optical low-pass filter 210 for removing a high frequency component from the subject light beam is disposed behind the dust filter 205. ing. An imaging element 221 is disposed behind the optical low-pass filter 210 and photoelectrically converts the subject image formed by the photographing optical system 101 into an analog image signal. In the present embodiment, it goes without saying that a two-dimensional solid-state image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) can be used as the image sensor 211.

  The image sensor 221 is connected to the image sensor drive circuit 223, and the image sensor drive circuit 223 is driven and controlled by a control signal from the input / output circuit 239. The image sensor driving circuit 223 reads an analog image signal from the image sensor 221, amplifies this signal, and performs analog-digital conversion (AD conversion) or the like. An output of the image sensor driving circuit 223 is connected to a preprocessing circuit 225, and the preprocessing circuit 225 performs various preprocessing such as pixel thinning processing for live view display.

  The output of the preprocessing circuit 225 is connected to the contrast AF circuit 226, and the contrast AF circuit 226 extracts a high frequency component (contrast signal) of the image signal output from the preprocessing circuit 225. The range of the image from which the contrast signal is extracted receives an instruction from the sequence controller, and performs extraction for an area such as the AF target, the entire imaging screen, or the enlarged display area. The extracted contrast signal is output to the body CPU 229.

  The output of the preprocessing circuit 225 is connected to a data bus 261 in an ASIC (Application Specific Integrated Circuit) 262. The data bus 261 includes an image processing circuit 227, a body CPU 229, a compression / decompression circuit 231, a video signal output circuit 233, an SDRAM control circuit 237, an input / output circuit 239, a communication circuit 241, a recording medium control circuit 243, and a flash memory control circuit. 247 and a switch detection circuit 253 are connected. In the present embodiment, the above-described contrast AF circuit 226 is disposed outside the ASIC 262. However, the contrast AF circuit 226 may be disposed within the ASIC 262.

  An image processing circuit 227 connected to the data bus 261 performs digital amplification (digital gain adjustment processing), color correction, gamma (γ) correction, contrast correction, black and white / color of digital image data output from the preprocessing circuit 225. Various image processing such as mode processing and live view display processing are performed. Further, the image processing circuit 227 determines whether or not a face portion is included in the image using the image data, and if included, determines the position and size of the face. Note that dedicated hardware may be used for face detection. Also, the luminance distribution and saturation of the image data are determined.

  The body CPU 229 connected to the data bus 261 controls the operation of this digital camera according to the program stored in the flash memory 249. Further, as described above, the body CPU 229 receives the contrast signal from the contrast AF circuit 226 and controls the automatic focus adjustment of the photographing optical system including the photographing optical system 101 via the lens CPU 111.

  The compression / decompression circuit 231 connected to the data bus 261 compresses the image data stored in the SDRAM 238 using JPEG or TIFF. Note that image compression is not limited to JPEG or TIFF, and other compression methods can be applied.

  The video signal output circuit 233 connected to the data bus 261 is connected to the rear liquid crystal monitor 26 and the finder liquid crystal monitor (abbreviated as “F liquid crystal monitor” in the figure) 29 via the liquid crystal monitor drive circuit 235. The video signal output circuit 233 converts the image data stored in the SDRAM 238 or the recording medium 245 into a video signal to be displayed on the rear liquid crystal monitor 26 and / or the finder liquid crystal monitor 29.

  The rear liquid crystal monitor 26 is disposed on the rear surface of the camera body 200. However, the rear liquid crystal monitor 26 is not limited to the rear surface as long as it can be observed by the photographer. The in-viewfinder liquid crystal monitor 29 is disposed at a position that can be observed by the photographer through the viewfinder eyepiece, and, like the rear liquid crystal monitor 26, is not limited to the liquid crystal and may be another display device. It is possible to use only the liquid crystal monitor 26 for observing the subject image, and omit the viewfinder eyepiece and the viewfinder liquid crystal 29.

  The SDRAM 238 is connected to the data bus 261 via the SDRAM control circuit 237, and the SDRAM 238 temporarily stores the image data processed by the image processing circuit 227 or the image data compressed by the compression / expansion circuit 231. This is a buffer memory.

  The input / output circuit 239 is connected to the above-described dustproof filter drive circuit 211, shutter drive mechanism 213, and image sensor drive circuit 223, and controls input / output of data with each circuit such as the body CPU 229 via the data bus 261. The communication circuit 241 is connected to the lens CPU 111 via the communication contact 300 and is also connected to the data bus 261. The communication circuit 241 exchanges data and communicates control commands between the lens CPU 111 and the body CPU.

  A recording medium control circuit 243 connected to the data bus 261 is connected to the storage medium 245 and controls recording and reproduction of image data and the like on the recording medium 245. The recording medium 245 is configured so that any one of rewritable recording media such as CompactFlash (registered trademark), SD memory card (registered trademark), and Memory Stick (registered trademark) can be loaded. It is removable with respect to. In addition, a hard disk unit such as a microdrive (registered trademark) or a wireless communication unit may be connectable.

  A flash memory control circuit 247 connected to the data bus 261 is connected to a flash memory 249. The flash memory 249 is an electrically rewritable nonvolatile memory and controls the operation of the camera. Programs for control, adjustment values for control, and the like are stored. The body CPU 229 controls the digital camera in accordance with programs, adjustment values, and the like stored in the flash memory 249.

  The switch detection circuit 253 connected to the data bus 261 is connected to the power switch 257, other various switches 255, and the above-described attachment / detachment detection switch 259. The power switch 257 is turned on / off in conjunction with a power switch lever for controlling the power supply of the camera body 200 and the interchangeable lens 100. Other various switches 255 include a switch linked to the release button, a switch linked to the playback button for instructing the playback mode, and a cross button for instructing the movement of the cursor displayed on the screen of the rear liquid crystal monitor 26. There are a switch linked to the mode dial, a switch linked to the OK button for determining each selected mode, etc., and a switch linked to the mode dial for instructing the photographing mode.

  The release button has a first release switch that is turned on when the photographer is half-pressed and a second release switch that is turned on when the photographer is fully pressed. When the first release switch (hereinafter referred to as 1R) is turned on, the camera performs photographing preparation operations such as focus detection, focusing of the photographing lens, and photometry of the subject brightness, and the second release switch (hereinafter referred to as 2R). When turned on, a shooting operation for capturing image data of the subject image is executed based on the output of the image sensor 221.

  Next, the operation in this embodiment will be described with reference to FIGS. 2 to 5 and FIGS. 9 to 13. FIG. 2 is a main flow showing the operation after the power-on reset by the body CPU 229 on the camera body 200 side.

  When a battery is loaded in the camera body 200 or an external power source is connected, this flow starts. First, it is determined whether or not the power switch 257 of the camera body 200 is on (S1). If the result of the determination is that the power switch 257 is off, a sleep state, which is a low power consumption state, is entered (S3). This sleep state is canceled when the power switch 257 is turned off. On the other hand, if the result of determination in step S1 is that the power switch 257 is on, or if the sleep state is exited in step S3, power supply is started (S5). Thereby, power is supplied to each mechanism and each circuit in the camera body 200 and the interchangeable lens 100.

  Next, lens information is acquired (S7). In this step, the focal position information and focal length information of the photographing optical system 101 detected by the optical position detection mechanism 105 is acquired from the lens CPU 111 via the communication circuit 241, and the closest focal length and long focal length focal length are acquired. Lens information such as specific information of various interchangeable lenses 100 such as an aperture value, an exposure correction value for each focal length, a peripheral light amount correction value (shading), a peripheral color correction value, and a distortion aberration correction value are acquired. In addition, information is also acquired on accessories related to lenses such as intermediate rings and teleconverters, and the presence or absence of wearing is also detected.

  When the lens information is acquired, the operation mode and parameter setting are performed next (S9). In this step, if there is information such as a photographing mode set by a mode dial (not shown), ISO sensitivity, manually set shutter speed, aperture value, etc., those photographing conditions are read.

  Subsequently, the live view operation is started (S11). Here, based on the image signal from the image sensor 221, the subject image is displayed as a moving image on the rear liquid crystal monitor 26 for observing the subject image. When the live view operation is started, the photometry / exposure amount is calculated (S13). In this step, the subject brightness is obtained based on the output of the image sensor 221, and exposure control values such as a shutter speed and an aperture value for appropriate exposure are calculated according to the shooting mode and shooting conditions using the subject brightness.

  Once the photometry / exposure amount is calculated, a live view operation is performed (S15). As will be described later, if the power switch is on in step S25, the process returns to step S13, and after the imaging operation / image processing of the image sensor 221 is performed in step S13 in this processing loop, the rear surface The display on the liquid crystal monitor 26 is updated, and live view display is performed by moving image display. Further, in the live view operation subroutine, when manual focus is set, enlarged display is performed according to the operation of the distance ring 112. A detailed flow of this live view operation will be described later with reference to FIG.

  Once the live view operation has been performed, it is next determined whether or not the playback switch is on (S17). Here, it is determined whether or not the playback switch linked to the playback button is on. If the result of this determination is that the regeneration switch is on, regeneration operation is performed (S31). In this reproduction operation, the captured image recorded on the recording medium 245 is reproduced and displayed on the rear liquid crystal monitor 26.

  If the playback operation is performed or if the result of determination in step S17 is that the playback switch is not on, it is next determined whether or not the menu switch is on (S19). Here, it is determined whether or not the menu switch linked to the menu button is on.

  If the result of determination in step S19 is that the menu switch is on, menu setting operation is performed (S33). In this menu setting operation, a menu screen is displayed on the rear liquid crystal monitor 26 and is displayed on various setting screens such as ISO sensitivity, white balance, manual focus (MF) mode, autofocus (AF) mode, and image stabilization mode. The photographer sets various modes and parameters by operating the cross button and the OK button. Executes the menu set mode. For example, when the image stabilization mode is set, the image stabilization operation is executed during the live view operation and the shooting operation.

  The MF mode is a mode for performing focusing by manually operating the distance ring 112 by the photographer. When the MF mode is set, the MF assist mode can be set. The MF assist mode is a mode for enlarging and displaying a live view in order to facilitate focusing when operating the distance ring 112. At this time, optical information of the photographing optical system such as a contrast state and a focal length is displayed. Change magnification based on.

  If the menu setting operation is performed or if the result of determination in step S21 is that the menu switch is not on, it is next determined whether or not the 1R switch is on (S21). Here, it is determined whether or not the 1R switch that is turned on when the release button is half-pressed is not turned on.

  If the result of determination in step S <b> 21 is that the 1R switch is on, a shooting operation is performed (S <b> 35). Here, in the AF mode, the photographing optical system 101 is focused by contrast AF, and an exposure control value for appropriate exposure is calculated by photometry / exposure calculation. When the 2R switch that is turned on when the release button is fully pressed is turned on, an exposure operation is performed, and image data of a still image is recorded on the recording medium 245. A detailed flow of this photographing operation will be described later with reference to FIG.

  When the photographing operation is finished, or if the result of determination in step S21 is that the 1R switch is not on, it is next determined whether or not the lens is removed (S23). Here, it is determined by the attachment / detachment detection switch 259 whether or not the interchangeable lens 100 has been removed from the camera body 200. If the result of this determination is that the interchangeable lens 100 has been removed, the live view operation is stopped (S37), and the power supply is stopped (S39). Since the interchangeable lens 100 is removed and no subject image is formed on the image sensor 221, the live view display is stopped and the power supply is stopped to prevent waste of power.

  Subsequently, it is determined whether or not the interchangeable lens 100 is attached (S41). Here, it is determined whether or not the removed interchangeable lens 100 is mounted again. This determination is detected by interrupt processing when the attachment / detachment detection switch 259 is turned on. If the lens attachment is detected by this determination, the process returns to step S5 to execute the above-described operation.

  If the result of determination in step S23 is that the lens has not been removed, it is next determined whether or not the power switch 257 is on (S25). In the present embodiment, when the power switch 257 is turned on, the power on mode is set and the camera is in an operating state. Thereafter, when the power switch 257 is turned off, the camera enters a power-off mode, and the camera is deactivated.

  If the result of determination in step S25 is that the power switch 257 is on, it is in power-on mode, so processing returns to step S13 and the above-described operation is executed. That is, when the power is on, steps S13 to S23 are repeatedly executed. On the other hand, if the result of determination in step S25 is that the power switch 257 is not on, a power off mode is entered and power supply is stopped (S27). When the power supply is stopped, the process returns to step S3 to enter the sleep state described above.

  Next, the live view operation in step S15 will be described using the flowchart shown in FIG. If the live view operation flow is entered, first, an imaging process is performed (S51). Here, the image sensor 221 acquires image data.

  Once the imaging process has been performed, it is next determined whether or not the current camera focus mode is set to the MF mode (S53). As described above, since the MF mode is set in the menu setting operation in step S33, it is determined whether or not the MF mode is selected in this step.

  If the result of determination in step S53 is that MF mode has been set, then lens communication is carried out (S55). In this step, communication with the lens CPU 111 in the interchangeable lens 100 is performed, and information regarding the type and state of the interchangeable lens 100 is acquired. The lens information relates to, for example, a focal length, a focus adjustment lens position (focus position), whether or not it is a macro lens, a shootable distance range, and the like. In addition, when the aperture 103 is operated or the distance ring 112 is operated, information on the operation direction and the operation amount is acquired.

  Once lens communication has been carried out, it is next determined whether or not the camera is set to the MF assist mode (S57). As described above, since the MF assist mode is set on the menu screen, it is determined here whether or not the MF assist mode is set on the menu screen.

  If the result of determination in step S57 is MF assist mode, it is next determined whether or not the distance ring has been operated (S59). In the lens communication in step S55 described above, since information regarding the operation state of the distance ring 112 is acquired, determination is made based on this information.

  If the result of determination in step S59 is that the distance ring 112 has been operated, then contrast detection is performed (S61). In this step, the contrast AF circuit 226 detects a contrast signal based on the image data acquired from the image sensor 221. Here, the extraction range of the contrast signal is a range displayed on the rear liquid crystal monitor 26. Therefore, when the image is not enlarged, the contrast of the entire screen is detected. When the image is already enlarged, the contrast of the image corresponding to the enlarged portion of the image is detected.

  Once contrast detection is performed, lens information is received (S63). Here, communication with the lens CPU 111 in the interchangeable lens 100 is performed, and information regarding the current state of the interchangeable lens 100 is acquired. Specifically, the status information includes the amount of aperture, the focal length of the zoom lens, the focus position of the photographing optical system 1010, the presence / absence of a teleconverter for increasing the focal length, and the like.

  When the lens information is received, next, the display magnification is set (S65). Since the MF assist mode is set in step S57 and the distance ring 112 has been operated in step S59, an enlargement magnification for enlarging the live view display is set in step S65. . The display magnification is set based on the contrast detected in step S61 and information on the state of the interchangeable lens 100 acquired in step S63. A detailed flow of setting the display magnification will be described later with reference to FIG. If the display magnification ratio is switched quickly according to the contrast detection result, the display will change suddenly, making it difficult to operate. A stable display switching may be performed by providing.

  If the result of determination in step S53 is that it is not MF mode, it is AF mode, so contrast AF is performed (S71). In this step, based on the image data acquired from the image sensor 221, the contrast AF circuit 226 extracts a contrast signal, and the body CPU 229 performs focusing of the photographing optical system 101 so that the contrast signal has a peak.

  If contrast AF is performed in step S71, or if the result of determination in step S57 is that the MF assist mode has not been set, or if the result of determination in step S59 is that the distance ring has not been operated, a display is displayed. The enlargement magnification is set to 1 (S73). When AF mode is set, when MF mode is set but MF assist mode is not set, or when MF assist mode is set and distance ring is not operated Since the magnified display of the subject image in live view display is not performed, the magnification is set to 1.

  If the display enlargement magnification is set to 1 in step S73 or the display enlargement magnification is set in step S65, image processing is then performed (S67). Here, the preprocessing circuit 225 and the image processing circuit 227 perform image processing on the image data subjected to the imaging processing in step S51.

  Once image processing has been performed, live view display is then performed (S69). Here, live view display is performed on the rear liquid crystal monitor 26 and the in-viewfinder liquid crystal monitor 29 using the image data subjected to the image processing. If the MF assist mode is set, the subject is displayed in live view at the display magnification set in step S65. In other modes, the subject is displayed in live view at the magnification 1.

  Next, the display magnification setting in step S65 will be described using the flowchart shown in FIG. When the display magnification setting flow is entered, it is first determined whether or not the image stabilization mode is set (S111). When the image stabilization mode is set, the blur correction drive mechanism 260 drives the image sensor 221 so as to cancel the blur based on the blur amount detected by the blur detection unit 297. Since the image stabilization mode is set on the menu screen, in this step, it is determined whether or not the image stabilization mode is set on the menu screen.

  If the result of determination in step S111 is that the image stabilization mode has not been set, an enlargement magnification corresponding to the focal length and contrast is set (S113). As the magnification setting, for example, as shown in FIG. 13A, when the focal length is 200 mm or more and the contrast is low, the magnification is set to 1. The magnification is increased and the focal length is shortened. When the magnification is increased, the focal length is 100 mm or less, and the contrast is high, the enlargement magnification is set to 7 times. That is, in this embodiment, the magnification is reduced as the contrast is lower and the focal length is larger.

  The contrast used for obtaining the magnification is calculated by comparing the contrast value calculated and output by the contrast AF circuit 226 based on a predetermined image area such as an enlarged display area with a predetermined contrast determination value. It is determined which of the three levels, / low, and in the relationship diagram shown in FIG. 13A, an item corresponding to the focal length is referred to and an enlargement magnification corresponding to the contrast is selected.

  On the other hand, if the image stabilization mode has been set as a result of the determination in step S111, the enlargement ratio corresponding to the focal length, the contrast, and the image stabilization mode is set (S115). As the magnification setting, for example, as shown in FIG. 13B, when the focal length is 200 mm or more and the contrast is low, the enlargement magnification is set to 1. As the contrast is increased and the focal length is shortened, the magnification is increased. When the magnification is increased, the focal length is 100 mm or less, and the contrast is high, the enlargement magnification is set to 10 times.

  Even when the image stabilization mode is set, the enlargement magnification is set such that the lower the contrast and the greater the focal length, the smaller the enlargement magnification. When the image stabilization mode is set, the effect of camera shake is reduced by the image stabilization operation. Therefore, the enlargement magnification is set larger than when the image stabilization mode is not used.

  When the enlargement magnification is set in step S113 or step S115, the process returns to the original flow.

  Thus, in the display magnification setting flow, the display magnification is appropriately set according to the focal length and contrast. That is, in a state where the focus is not good, in other words, in a state where the contrast is “low”, the display can be enlarged as shown in FIG. Even when the contrast is low, as shown in FIG. 11, the magnification can be set to a recognizable level, and the usability of manual focus can be improved.

  Further, since the contrast increases as the focus is adjusted by the manual focus operation, the display is enlarged as shown in the change from FIG. 11 to FIG. it can.

  Next, the photographing operation in step S35 will be described using the flowchart shown in FIG. If the shooting operation flow is entered, it is first determined whether or not the AF mode is set (S81). Since the AF mode is set on the menu screen, the determination is made here based on the mode setting on the menu screen.

  If the result of determination in step S81 is AF mode, contrast AF is executed (S83). Here, based on the contrast signal extracted by the contrast AF circuit 226, the driving direction of the photographing optical system 101 is determined, the peak position of the contrast is searched while driving in this direction, and the detected peak position is determined as the photographing optical system 101. Stop as the focal point. If the MF mode is set, the lens CPU 111 performs manual adjustment of the photographing optical system 101 in accordance with the operation of the distance ring 112 as will be described later.

  If contrast AF is executed, or if the result of determination in step S81 is not AF mode, that is, if it is MF mode, then photometry / exposure amount calculation is performed (S85). Here, similarly to step S13, subject brightness is measured based on the output from the image sensor 221, and an exposure control value for appropriate exposure is calculated based on this photometric value.

  Once photometry / exposure calculation has been carried out, it is next determined whether or not the 2R switch is on (S87). Here, it is determined whether or not the release button is fully pressed and the 2R switch is turned on. If the result of determination in step S87 is that the 2R switch is not on, it is next determined whether or not the 1R switch is on (S89). If the result of this determination is that the 1R switch has not been turned on, the photographer's finger or the like has been released from the release button, so the flow of the photographing operation is terminated and the original flow is restored.

  On the other hand, if the result of determination in step S89 is that the 1R switch is on, processing returns to step S87. When the photographer maintains the half-pressed state of the release button, a standby state is detected in which steps S87 and S89 are detected alternately.

  As a result of the determination in step S87, when the 2R switch is turned on, the shooting preparation operation is shifted to the exposure operation. First, a narrowing execution instruction is issued (S91). Here, the aperture value calculated in step S85 is transmitted to the lens CPU 111, the aperture of the aperture 103 is instructed, and the aperture operation is performed up to the aperture value transmitted by the aperture drive mechanism 109. Subsequently, it is determined whether or not the narrowing is completed (S93). When the narrowing is completed, a completion signal is transmitted from the lens CPU 111, and it waits for this signal to be transmitted.

  If narrowing is completed as a result of the determination in step S93, an exposure operation is then performed (S95). In this exposure operation, first, the front curtain of the shutter 203 is caused to travel, and charge accumulation of pixel signals of the image sensor 221 is started. When the shutter time determined by the exposure calculation or the manually set shutter time elapses, the rear curtain of the shutter 203 is caused to travel, and charge accumulation in the image sensor 221 is stopped.

  When the exposure operation is finished, next, an instruction to open the aperture is given (S97). Here, the lens CPU 111 is instructed to open the aperture 103, and the aperture driving mechanism 109 performs the opening operation up to the open aperture value. Subsequently, it is determined whether or not the aperture has been fully opened (S99). When the opening of the aperture is completed, an opening completion signal is transmitted from the lens CPU 111, and it is awaited that this signal is transmitted.

  If the result of determination in step S99 is that aperture opening is complete, image processing is next carried out (S101). Here, the image signal of the image sensor 221 read by the image sensor drive circuit 223 is subjected to image processing by the pre-processing circuit 225, the image processing circuit 227, the compression / decompression circuit 231, and the like. Once image processing has been carried out, next image recording is carried out (S103). Here, the image data subjected to the compression processing or the like is recorded on the recording medium 245. When the image recording is finished, the shooting operation flow is ended, and the original flow is restored.

  Next, the operation of the lens CPU 111 in the interchangeable lens 100 will be described using the flowchart shown in FIG. This interchangeable lens main flow starts when the interchangeable lens is powered on, that is, when the interchangeable lens 100 is attached to the camera body 200 and power is supplied from the built-in battery on the camera body 200 side or an external power source.

  When the power-on reset on the lens side starts, it is first determined whether or not there is a lens information request (S151). In steps S7, S55, S63, etc., the body CPU 229 requests various lens information such as focal length information, focal position information, and status information of the interchangeable lens 100. Therefore, in step S151, it is determined whether or not there is a request for such lens information.

  If the result of determination in step S151 is that there is a request for lens information, lens information is transmitted (S171). Here, the lens CPU 111 transmits lens information to the body CPU 229 via the communication circuit 241.

  If the result of determination in step S151 is that there has been no lens information request, it is next determined whether or not an instruction to narrow down has been received (S153). In step S91, the body CPU 229 issues a narrowing execution instruction. In this case, the body CPU 229 also transmits information on the narrowing aperture value.

  As a result of the determination in step S153, if there is a narrowing execution instruction, a narrowing operation is performed (S173). Here, the lens CPU 111 causes the aperture driving mechanism 109 to perform the aperture operation up to the received aperture value. When the narrowing-down operation is completed, a narrowing-down completion signal is transmitted to the body CPU 229.

  If the result of determination in step S153 is that no narrowing execution instruction has been received, it is next determined whether or not an aperture opening execution instruction has been received (S155). In step S97, the body CPU 229 issues an aperture opening execution instruction.

  If the result of determination in step S155 is that there is an aperture opening execution instruction, the aperture opening operation is executed (S175). Here, the lens CPU 111 causes the aperture driving mechanism 109 to perform the opening operation up to the open aperture value. When the aperture opening operation is finished, an opening completion signal is transmitted to the body CPU 229.

  If the result of determination in step S155 is that it has not received an aperture opening execution instruction, it is next determined whether or not a lens drive execution instruction has been received (S157). The body CPU 229 issues a lens drive execution instruction together with information on the drive direction and drive amount in the contrast AF in steps S71 and S83.

  If the result of determination in step S157 is that there is a lens drive execution instruction, lens drive is executed (S177). Here, the lens CPU 111 instructs the optical system driving mechanism 107 to drive the photographing optical system 101 with the received driving direction and driving amount. When the driving is completed, a lens driving completion signal is transmitted to the body CPU 229.

  If each operation | movement is performed in step S171, S173, S175, S177, it will return to step S151.

  If the result of determination in step S157 is that there is no lens drive execution instruction, it is next determined whether or not the camera body is set to MF mode (S159). Here, communication with the camera body 100 is performed, and information on whether or not the MF mode is set is acquired and determined.

  If the result of determination in step S159 is that the MF mode has been set, it is detected whether or not the distance ring 112 has been operated (S161). The lens CPU 111 detects and determines the state of the distance ring 112. If the result of this determination is that the distance ring has not been operated, or if the result of determination in step S159 is that there is no MF mode, processing returns to step S151.

  If the result of determination in step S161 is that the distance ring 112 has been operated, lens driving is performed in accordance with the operation of the distance ring (S163). In this step, the operation direction and the operation amount of the distance ring 112 are detected, and lens driving is executed according to the detection result. Once the lens is driven, information on the distance ring operation is transmitted to the camera body (S165). In this step, when transmitting information during the distance ring operation by communication with the camera body, for example, position information of the focus lens may be transmitted to the camera body. If the information during distance ring operation is transmitted, it will return to step S161.

  In this way, the focus lens is driven according to the operation of the distance ring and the manual focus operation is performed by the processing loop of steps S161 to S165. In this embodiment, when step S165 is executed, the process returns to step S161. However, the present invention is not limited to this, and the process may return to step S151. In this case, the release operation can be quickly executed when the release button is fully pressed during the manual focus operation.

  As described above, in the first embodiment of the present invention, during the manual focus operation, based on the focal length information that is the optical characteristic information of the interchangeable lens and the contrast of the subject image, the live view operation is performed. The magnification of display on the rear liquid crystal monitor 26 is set. For this reason, image display suitable for performing focusing by visual observation can be performed.

  Further, when the image stabilization mode is set, the enlargement magnification is set to be larger than that when the image stabilization mode is not set. For this reason, if there is a risk of camera shake, it will be enlarged and displayed at a low magnification, so the subject to be focused will not be enlarged unnecessarily, even though the image is blurred. It is possible to easily recognize the position in the screen and which part of the subject is enlarged, and the convenience of focusing by manual focus operation is improved.

  Next, the operation of the first modification of the display magnification setting shown in FIG. 5 will be described using the flowchart shown in FIG.

  If the display magnification setting flow is entered, first, the photographing magnification is calculated (S121). Here, the photographing magnification (= focal length / subject distance) is obtained from the focal length acquired through communication with the interchangeable lens 100 and the focus adjustment lens position (information corresponding to the subject distance).

  Once the shooting magnification is calculated, the enlargement magnification is set according to the shooting magnification (S123). Here, the magnification is set according to the photographing magnification and contrast. For example, as shown in FIG. 14, when the photographing magnification is 100 or more and the contrast is low, the enlargement magnification is set to 1. As the contrast increases, or as the photographing magnification decreases, the enlargement magnification is increased and the photographing magnification is 10 or less. If the contrast is high, the magnification is set to 7 times. That is, in the present embodiment, the magnification is reduced as the contrast is lower and the photographing magnification is larger.

  Since the display magnification is set according to the photographing magnification, an appropriate magnification can be set regardless of the type of interchangeable lens, for example, the zoom position of a telephoto lens, wide-angle lens, or zoom lens. Note that the photographing magnification may be calculated by the lens CPU 111 in the interchangeable lens 100 and transmitted from the interchangeable lens 100 to the body CPU 229 of the camera body 200 as photographing magnification information during lens communication. When the enlargement ratio is set, the original flow is restored.

  Next, the operation of the second modification example of the display magnification setting shown in FIG. 5 will be described using the flowchart shown in FIG.

  If the display magnification setting flow is entered, it is first determined whether or not a teleconverter (abbreviated as telecon in the figure) is attached (S131). When communicating with the interchangeable lens, communication is also performed with the teleconverter, and information on whether or not the teleconverter is mounted is also acquired, and thus determination is made based on this information. The teleconverter (not shown) has a configuration that can be mounted between the interchangeable lens 100 and the camera body 200, and includes a teleconverter CPU therein, and a communication circuit 241 of the camera body 200 via the mount contact 300. Communication is possible. There are several types of teleconverters with different magnifications.

  If the result of determination in step S131 is that the teleconverter is attached, the magnification of the teleconverter and the enlargement magnification corresponding to the contrast are set (S133). Here, based on the teleconverter magnification and contrast acquired by communication with the teleconverter, the enlargement magnification is obtained from, for example, a table showing the teleconverter contrast and the enlargement magnification as shown in FIG. In the example shown in FIG. 15, there are two types of magnifications of the teleconverter, 2 × and 1.4 ×, and the magnification is reduced as the magnification of the teleconverter is higher and the contrast is lower.

  If the result of determination in step S <b> 131 is that no teleconverter is attached, an enlargement factor corresponding to the contrast is set (135). Here, the higher the contrast, the higher the magnification is set. In the example shown in FIG. 15, the enlargement magnification according to the contrast is obtained in the column without the teleconverter.

  When the enlargement ratio is set in step S133 or step S135, the process returns to the original flow.

  Thus, in this modification, it is determined whether or not the teleconverter is mounted, and when the teleconverter is mounted, the enlargement magnification is set according to the magnification of the teleconverter. In the case of shooting at a high shooting magnification with a teleconverter attached, the display magnification can be set smaller. When a teleconverter is installed, the live view image is not enlarged unnecessarily, and the position of the subject to be focused on the screen and which part of the subject is easily recognized can be easily recognized. This improves the usability of focusing by manual focus operation.

  Next, the operation of the third modification of the display magnification setting shown in FIG. 5 will be described using the flowchart shown in FIG.

  If the display magnification setting flow is entered, it is first determined whether or not the interchangeable lens is a macro lens (S141). Here, since information on whether or not the lens is a macro lens is acquired at the time of communication with the interchangeable lens 100, the determination is made based on this information.

  If the result of determination in step S141 is that a macro lens has been attached, next, an enlargement magnification is set in accordance with the macro lens type and contrast (S143). Here, for example, an enlargement magnification corresponding to the contrast in the macro lens column of FIG. 16 is set. At this time, a plurality of enlargement magnifications may be selected according to information on the type of macro lens such as the maximum magnification obtained by lens communication.

  On the other hand, if the result of determination in step S141 is that no macro lens is mounted, next, an enlargement magnification is set in accordance with the contrast (S145). Here, the higher the contrast, the higher the magnification is set. In the example shown in FIG. 16, the enlargement magnification according to the contrast is obtained in a column other than the macro lens.

  When the enlargement magnification is set in step S143 or step S145, the process returns to the original flow.

  As described above, in this modification, it is determined whether or not the macro lens is attached. When the macro lens is attached, the display magnification is set according to the photographing magnification of the macro lens. In the case of high-magnification shooting with a macro lens attached, the display magnification can be set smaller. When the shooting magnification is high as in macro shooting, the Live View image is not enlarged unnecessarily, and it is easy to determine the position of the subject on the screen and which part of the subject is being enlarged. This makes it possible to recognize and improve the convenience of focusing by manual focus operation.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment of the present invention, when the MF assist mode is set, manual focus is performed according to the operation of the distance ring 112, and at that time, according to the optical information and the contrast information, FIGS. As shown in FIG. 12, the live view image was enlarged and displayed. However, in the first embodiment, it is not clear which area is enlarged before being enlarged. Therefore, in the present embodiment, the area to be enlarged is indicated by a frame display before being enlarged and displayed.

  The configuration of the present embodiment is the same as the electrical configuration of the first embodiment shown in FIG. 1, and the flowcharts shown in FIGS. 2 to 9 are also the flowcharts of the live view operation shown in FIG. Since only the flowchart shown in FIG. 17 is replaced, this different flowchart will be mainly described.

  In the flowchart shown in FIG. 17, the processing from step S51 to S69 is the same as the flow shown in FIG. 3, and the case where the result of determination in step S59 is No is different. If the result of determination in step S57 is that the MF assist mode is set, and the result of determination in step S59 is that the distance ring operation has not been performed, the frame display of the enlarged region is performed in step S201 and subsequent steps. Process.

  First, contrast detection is performed as in step S61 (S201), and lens information is received as in step S63 (S203). Subsequently, the display magnification is calculated (S205). Here, as described in the flow of FIGS. 5 to 8, the enlargement magnification is obtained using FIGS.

  Once the display magnification is obtained, the frame display is then displayed (S207). Here, when the display magnification is currently displayed at 1 ×, a frame display corresponding to the display magnification obtained in step S205 is displayed. Once the frame display is displayed, next, image processing is performed (S209). Here, image processing is performed with a live view image having a display magnification of 1 ×. Subsequently, live view display is performed (S211). Here, an image in which a frame display is superimposed on a live view image having a display magnification of 1 is displayed. When live view display is performed, the original flow is restored.

  FIG. 18 shows live view display on the rear liquid crystal monitor 26 in the present embodiment. In FIG. 18, a frame display 400 indicating the area to be enlarged next is displayed on the screen. When the manual focus operation is performed and the focus is achieved, the contrast is improved, and when the manual focus is temporarily stopped, an area to be enlarged and displayed next is shown.

  For example, in FIG. 8, in the case of the condition of “macro lens” and contrast “low”, the image is displayed at an enlargement magnification of 1. When the contrast changes from “low” to “medium” as the focus approaches the focus by the manual focus operation, the magnification will be doubled. This is indicated by a display 400.

  In the present embodiment, since the photographer can know in advance the area to be enlarged by displaying the enlarged display scheduled area in a frame, it is possible to provide an imaging apparatus that is easy to use for composition setting and the like.

  In this embodiment, in FIG. 18, instead of increasing the display magnification, the frame display 400 may be changed to 401, and the frame display corresponding to the area to be enlarged may be changed. Alternatively, after the frame display 400 is displayed for a predetermined time, the display is enlarged, and the area to be enlarged is visually confirmed before enlargement, and then manual focusing is performed while viewing the enlarged display. In this case, the usability can be further improved. In addition, by moving the frame display indicating the range to be magnified up, down, left and right using an operation button such as a cross button, the user can adjust the focus of the target location without changing the composition. May be. In addition, if the display magnification ratio is switched quickly according to the contrast detection result, the display will change suddenly, making it difficult to operate. A stable display switching may be performed by providing.

  As described above, in each embodiment and each modification of the present invention, the rear liquid crystal is based on the optical information such as focal length information, photographing magnification information, teleconverter mounting, macro lens mounting, and contrast information, and contrast information. The magnification of the live view image displayed on the display unit such as the monitor 26 is changed. For this reason, in the manual focus operation, the usability of focusing can be improved.

  In each embodiment and each modification of the present invention, the interchangeable lens 100 and the camera body 200 are configured separately. However, the present invention is not limited to this, and the interchangeable lens 100 and the camera body 200 are configured integrally. Also good.

  In the relationship diagrams for obtaining the enlargement magnification shown in FIGS. 13 to 16, the contrast determination value is divided into three. However, the present invention is not limited to this, and the number of divisions may be increased. Further, although the focal length is divided into three in FIG. 13, the photographing magnification is divided into three in FIG. 14, and the magnification of the teleconverter is two steps in FIG. 15, this is not limiting, and the number of divisions may be increased. Finer settings can be made by increasing the number of divisions. Further, the contrast determination value may be changed as appropriate according to shooting conditions, shooting modes, optical specifications of the interchangeable lens, and subject conditions such as luminance.

  In each embodiment and each modification of the present invention, live view display is performed on the rear liquid crystal monitor 26 and enlargement display is performed in the MF assist mode. Instead of the rear liquid crystal monitor 26, the enlargement magnification to be displayed may be adjusted in the finder liquid crystal monitor 29.

  In each embodiment and each modification of the present invention, a digital camera has been described as an apparatus for shooting. However, the camera may be a digital single-lens reflex camera or a compact digital camera, such as a video camera, movie It may be a moving image camera such as a camera, or may be a camera built in a mobile phone, a personal digital assistant (PDA), a game machine, or the like. In any case, the present invention can be applied to any photographing apparatus capable of manual focusing.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, you may delete some components of all the components shown by embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

26... Rear liquid crystal monitor, 29... Finder liquid crystal monitor, 100... Interchangeable lens, 101... Photographing optical system, 101 a. Diaphragm, 105 ... Optical position detection mechanism, 107 ... Optical system drive mechanism, 109 ... Diaphragm drive mechanism, 110 ... Encoder, 111 ... Lens CPU, 112 ... Distance ring, 200 ..Camera body, 203 ... Shutter, 205 ... Dustproof filter, 207 ... Piezoelectric element, 209 ... Infrared cut filter, 210 ... Optical low-pass filter, 211 ... Dustproof filter drive Circuit, 213 ... Shutter drive mechanism, 221 ... Image sensor, 223 ... Image sensor drive circuit, 225 ... Pre-processing circuit, 226 ... Contrast AF circuit 227 ... Image processing circuit, 229 ... Body CPU, 231 ... Compression / decompression circuit, 233 ... Video signal output circuit, 235 ... Liquid crystal monitor drive circuit, 237 ... SDRAM control circuit, 238 ... SDRAM, 239 ... I / O circuit, 241 ... Communication circuit, 243 ... Recording medium control circuit, 245 ... Recording medium, 247 ... Flash memory control circuit, 249 ... Flash Memory, 253 ... Switch detection circuit, 255 ... Other switches, 257 ... Power switch, 259 ... Attach / detach detection switch, 260 ... Shake correction drive mechanism, 296 ... Actuator drive circuit, 297 ... blur detection means, 297a ... angular velocity sensor, 297b ... angular velocity detection circuit, 290 ... imaging device unit, 3 0 ... communication contact, 400 ... frame display, 401 ... frame display

Claims (8)

A photographic optical system for forming an image of a light flux from a subject;
Manual focus adjusting means for changing the focal position of the photographing optical system in accordance with an operation by the photographer;
Imaging means for repeatedly acquiring an image based on the luminous flux from the subject;
Contrast detection means for detecting the contrast of the subject image based on the image acquired by the imaging means;
Display means for displaying the image acquired by the imaging means as a live video;
Display control means for determining the magnification of the live video displayed on the display means based on the optical information of the photographing optical system and the contrast detected by the contrast detection means;
An imaging apparatus comprising: The optical information is focal length information of the photographing optical system,
The imaging apparatus according to claim 1, wherein the display control unit determines the enlargement magnification based on focal length information of the imaging optical system and the contrast. The optical information is information related to the photographing magnification of the photographing optical system,
2. The photographing apparatus according to claim 1, wherein the display control unit determines the enlargement magnification based on information related to a photographing magnification of the photographing optical system and the contrast. The optical information is information about a teleconverter attached to the photographing optical system,
The photographing apparatus according to claim 1, wherein the display control unit determines the enlargement magnification based on information on the teleconverter and the contrast. The optical information is information regarding whether or not the photographing optical system is a macro lens,
The imaging apparatus according to claim 1, wherein the display control unit determines the enlargement magnification based on information on the macro lens and the contrast.   The display control means obtains a display magnification ratio based on the optical information of the photographing optical system and the contrast detected by the contrast detection means, and displays a frame display corresponding to the obtained display magnification ratio. The imaging apparatus according to claim 1, wherein: The photographing apparatus is composed of a camera body and a lens unit that can be attached to and detached from the camera body.
The lens unit includes the photographing optical system and the manual focus adjusting unit,
The camera body has the imaging means, contrast detection means, display means, and display control means,
The lens unit and the camera body are connected by communication means, and the camera body acquires the optical information via the communication means.
The imaging apparatus according to claim 1, wherein: Determine whether the distance ring was manually operated,
When the distance ring is operated, the display magnification is set based on the contrast information and the lens information.
Live view display is performed with this set display magnification.
A display method characterized by that.