JP2019179051A - Imaging apparatus, finder, and imaging system - Google Patents

Abstract

To provide an electric view finder which enables detection of an approach with substantially the same detection sensitivity.SOLUTION: An electronic view finder 400, which is removably attached to an imaging apparatus, includes: an eyepiece optical axis rotatable around an imaging apparatus; a dichroic mirror 406 dividing a detected light into a reflected light and a transmitting light; a movable mirror 407 guiding the reflected light substantially in parallel to the eyepiece optical axis; and an angle detector 409 detecting the angle of rotation of the eyepiece optical axis, the imaging apparatus changing at least one of the intensity of the detected light, the sensitivity of light reception of light receiving means, or the threshold value on the basis of the angle of rotation detected by the angle detector 409.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an imaging apparatus such as a single-lens reflex camera, a finder, a control method thereof, and a program.

  2. Description of the Related Art Some imaging apparatuses such as an optical viewfinder and a single-lens reflex camera having a rear display unit include a proximity detection system that detects a proximity state between an object outside the imaging apparatus and the optical viewfinder. . With the proximity detection system, for example, when the user is looking through the optical viewfinder, it is determined that the user is in the proximity state, and power saving is realized by hiding the rear display unit.

  Some electronic viewfinders that can be attached to and detached from the imaging apparatus and whose eyepiece optical axis can rotate with respect to the imaging apparatus are equipped with a light emitting element and a light receiving element used in the proximity detection system. The light emitting element and the light receiving element are provided in the vicinity of the eyepiece window of the electronic viewfinder, and move following the rotation of the eyepiece optical axis. The imaging apparatus detects the proximity state between the object and the electronic viewfinder by using such a light emitting element and a light receiving element.

  In Patent Document 1, a proximity detection system is realized by a light emitting element and a light receiving element fixed to an imaging apparatus body by controlling the light intensity and the like of the light emitting element according to the rotation angle of the eyepiece optical axis of the electronic viewfinder. Technology is disclosed.

JP 2011-164314 A

  By using the prior art disclosed in Patent Document 1, the proximity detection function of the electronic viewfinder can be realized only by the proximity detection system of the imaging apparatus without mounting the light emitting element and the light receiving element on the electronic viewfinder. Therefore, an increase in cost can be suppressed.

  However, since the conventional technique disclosed in Patent Document 1 only controls the light intensity and the like of the light emitting element according to the rotation angle of the eyepiece optical axis of the electronic viewfinder, the detection sensitivity of the proximity detection function of the optical viewfinder There is a problem that is not constant. As a result, the frequency of occurrence of erroneous detection may increase.

  Therefore, an object of the present invention is to enable proximity detection of an optical viewfinder and an electronic viewfinder with substantially constant detection sensitivity while suppressing an increase in cost.

In order to achieve the above object, an imaging system according to the present invention includes:
An imaging device and an electronic viewfinder that can be attached to and detached from the imaging device, wherein the imaging device is an optical viewfinder, a light emitting unit that emits detection light, and the detection reflected by an object outside the imaging device A light receiving unit that receives light; and a proximity determination unit that determines whether or not the object is close to the optical viewfinder based on a light reception result of the light receiving unit based on a predetermined threshold, The electronic viewfinder includes an eyepiece optical axis that is rotatable with respect to the imaging device, an optical path dividing unit that divides the detection light into reflected light and transmitted light, and a guide that guides the reflected light substantially parallel to the eyepiece optical axis. And an angle detection unit that detects a rotation angle of the eyepiece optical axis, and the imaging device is configured to detect the intensity of the detection light based on the rotation angle detected by the angle detection unit, Receiving sensitivity of the optical means, or characterized by having a control means for changing at least one of the threshold.

  According to the present invention, it is possible to perform proximity detection with few false detections by enabling proximity detection of an optical viewfinder and an electronic viewfinder with substantially constant detection sensitivity while suppressing an increase in cost. Thereby, it is possible to appropriately control the display of the electronic viewfinder and the rear display unit, and it is possible to provide an imaging system that realizes power saving and usability improvement.

It is a figure which shows schematic structure inside the camera which concerns on embodiment. It is an external view of the proximity detection unit vicinity seen from the camera back. It is explanatory drawing of the proximity detection system at the time of EVF non-wearing. It is a figure which shows schematic structure of EVF. It is explanatory drawing of a proximity detection system at the time of EVF mounting | wearing ((theta) = 0). It is explanatory drawing of a proximity detection system at the time of EVF mounting | wearing ((theta) ≠ 0). It is a figure which shows the example of light emission intensity control with respect to the angle of an EVF eyepiece optical axis. It is a flowchart which shows imaging | photography operation | movement.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a diagram showing a schematic configuration inside a single-lens reflex camera (hereinafter referred to as a camera) constituting the imaging system according to the present embodiment.

  As shown in FIG. 1, the lens unit 100 is detachably attached to the camera 200 via a lens mounting mechanism of the mount portion. An electrical contact unit 104 is provided in the mount portion. The camera 200 communicates with the lens unit 100 via the electrical contact unit 104 to control the focus lens 101 in the lens unit 100. In FIG. 1, only the focus lens 101 is shown as the lens in the lens unit 100, but a variable power lens or a fixed lens may be provided in addition to this.

  The luminous flux from the subject is guided to the main mirror 201 in the camera 200 through the lens unit 100. The main mirror 201 is disposed obliquely with respect to the optical axis in the photographing optical path, and guides a light beam from the subject to an upper optical viewfinder (hereinafter referred to as OVF) 210; It is possible to move to the second position where it is retracted out of the photographing optical path.

  The central part of the main mirror 201 is a half mirror, and when the main mirror 201 is in the first position, a part of the light beam from the subject passes through the half mirror part. The light beam that has passed through the half mirror part is reflected by the sub mirror 202 provided on the back side of the main mirror 201 and guided to the focus detection device 203.

  On the other hand, the light beam reflected by the main mirror 201 is guided to the OVF 210. The OVF 210 includes a focus detection plate 2101, an OVF field frame 2102, an OVF display unit 2103, a pentaprism 2104, an OVF eyepiece 2105, and an OVF eyepiece frame 2106. The light beam reflected by the main mirror 201 forms a primary image on a focus detection plate 2101 disposed at a position optically conjugate with the image sensor 224. The light (subject image) diffused and transmitted by the focus detection plate 2101 passes through the OVF field frame 2102, passes through the OVF display unit 2103, and is converted into an erect image by the pentaprism 2104. The erect image is magnified by the OVF eyepiece 2105 and is observed by a photographer looking into the eyepiece frame 2106.

  The OVF field frame 2102 is disposed in the vicinity of the focus detection plate 2101, and the area captured by the image sensor 224 is visually recognized by the photographer by shielding the periphery of the light diffused and transmitted by the focus detection plate 2101. Let

  The in-OVF display unit 2103 is disposed in the vicinity of the focus detection plate 2101 and displays various types of shooting information of the camera such as a focus detection area, an aperture value, and a shutter speed, and superimposes the information on the subject image to form an eyepiece. It is presented to the photographer looking through the frame 2106.

  A part of the light diffused and transmitted by the focus detection plate 2101 passes through the photometric lens 221, forms a secondary image on the photometric sensor 222, and the photometric sensor 222 receives the light.

  When the main mirror 201 is raised to the second position, the sub mirror 202 is also folded with respect to the main mirror 201 and retracted out of the photographing optical path. Thereby, the light beam from the lens unit 100 passes through the focal plane shutter 223 which is a mechanical shutter and reaches the image sensor 224. The focal plane shutter 223 limits the amount of light incident on the image sensor 224. The imaging sensor 224 includes a photoelectric conversion element such as a CCD sensor or a CMOS sensor that outputs an electrical signal, and generates an image by photoelectrically converting the subject image formed by the lens unit 100.

  The camera 200 has a CPU 225 that controls the entire camera. The CPU 225 communicates with the lens control circuit 103 in the lens unit 100 via the electrical contact unit 104. The lens control circuit 103 controls the lens driving mechanism 102 in accordance with a signal from the CPU 225, and drives the focus lens 101 in the optical axis direction to perform focusing. The lens driving mechanism 102 has a stepping motor as a driving source.

  The CPU 225 is connected to an EEPROM 226 which is a storage unit. The EEPROM 226 adjusts parameters that need to be adjusted to control the camera, camera ID (identification) information that is unique information for identifying the individual camera, and parameters related to shooting acquired in the camera manufacturing process. The value etc. are memorized.

  The CPU 225 is connected to an operation detection unit (not shown) for the photographer to communicate his intention to the camera. The operation detection unit detects operations such as a release button and a selection button.

  The rear display unit 227 is a display device for displaying an image captured by the image sensor 224, items set by the photographer, and the like, and is generally configured by a color liquid crystal display element. A display control unit (not shown) connected to the CPU 225 controls the display of the rear display unit 227 and the OVF display unit 2103.

  A proximity detection unit 230 and an accessory base 240, which will be described later, are connected to the CPU 225 by electrical contacts and connection lines (not shown).

  FIG. 2 is an external view of the vicinity of the proximity detection unit viewed from the rear of the camera.

  The proximity detection unit 230 includes a light emitting element 2301, a light receiving element 2302, and a light shielding plate 2303. Under the control of the CPU 225, the light emitting element 2301 emits detection light having a wavelength in the infrared region. The detection light is reflected by an object 300 described later outside the camera 200, and the reflected light is received by the light receiving element 2302. The light shielding plate 2303 shields the detection light emitted from the light emitting element 2301 from being directly received by the light receiving element 2302.

  FIG. 3 is an explanatory diagram of the proximity detection system when the EVF is not installed.

The object 300 has a predetermined reflectivity and diffusely reflects incident light with uniform intensity in all directions regardless of incident light. The light emission intensity of the light emitting element 2301 when the EVF is not attached is P ₀ , and the amount of received light is E. The distance D from the light emitting element 2301 to the object 300 is designed so that proximity determination is performed when D ≦ D ₀ and proximity determination is not performed when D> D ₀ , and the determination threshold is adjusted in the manufacturing process. . In addition, the distance from the OVF eyepiece frame 2106 to the object 300 when D = D ₀ is D ′ ₀ and the amount of light received by the light receiving element 2302 is E ₀ .

  FIG. 4 is a diagram showing a schematic configuration of the EVF. FIG. 4A is a sectional view of the inside, and FIG. 4B is a side view of the appearance.

  The EVF 400 is detachably attached to and electrically connected to the accessory base 240 of the camera 200 by the EVF base 401. The in-EVF display unit 402 is composed of a color liquid crystal display element, and displays an image based on the control of the CPU 225. The image on the EVF display unit 402 is magnified by the EVF eyepiece lens 403 and is observed by a photographer looking into the EVF eyepiece frame 404. The optical axis of the EVF eyepiece lens 403 is referred to as an EVF eyepiece optical axis. The EVF head 405 includes an EVF display unit 402, an EVF eyepiece lens 403, and an EVF eyepiece frame 404, and can be manually rotated by a photographer.

  The dichroic mirror 406 transmits the low wavelength side of the detection light emitted from the light emitting element 2301 and reflects the high wavelength side. The detection light transmitted by the dichroic mirror 406 is diffusely reflected by the object 300, passes through the dichroic mirror 406 again, and is received by the light receiving element 2302. The detection light reflected by the dichroic mirror 406 is reflected by the movable mirror 407, travels substantially parallel to the EVF eyepiece optical axis, and is diffusely reflected by the object 300. Thereafter, the light diffusely reflected by the object 300 is reflected again by the movable mirror 407 and the dichroic mirror 406 and received by the light receiving element 2302.

  The gear 408 transmits the power when the photographer rotates the EVF head 405 to the movable mirror 407 and rotates the movable mirror 407. The rotation direction of the movable mirror 407 is the same as that of the EVF head 405, and the rotation angle of the movable mirror 407 is ½ of the rotation angle of the EVF head 405 and the rotation angle θ of the EVF eyepiece optical axis. This is because the detection light reflected by the movable mirror 407 is substantially parallel to the EVF eyepiece optical axis.

  The EVF angle detector 409 detects the rotation angle θ of the EVF eyepiece optical axis and transmits information on the rotation angle θ to the CPU 225.

  FIG. 5 is an explanatory diagram of the proximity detection system when the EVF is mounted when θ = 0.

d ₁ is the distance from the light emitting element 2301 to the dichroic mirror 406. d ₂ is the distance from the dichroic mirror 406 to the object 300. d ₃ is the distance from the dichroic mirror 406 to the movable mirror 407. d ₄ is the distance from the movable mirror 407 to the object 300. D _{1 (} not shown) is the total length of the path until detection light (hereinafter referred to as transmission detection light) emitted from the light emitting element 2301 and transmitted by the dichroic mirror 406 reaches the object 300. D _{2 (} not shown) is emitted from the light emitting element 2301, is reflected by the dichroic mirror 406, and then reflected by the movable mirror 407 (hereinafter, referred to as reflected detection light) is a total path to the object 300. Length. D ′ ₁ is the distance from the OVF eyepiece frame 2106 to the object 300. D ′ ₂ is the distance from the EVF eyepiece frame 404 to the object 300. D ₁ and _{D 2} is expressed by the following equation.

D ₁ = d ₁ + d ₂
D ₂ = d ₁ + d ₃ + d ₄
Here, when the light receiving sensitivity of the light receiving element 2302 is constant, the amount of light received by the light receiving element 2302 with respect to the emission intensity of the detection light attenuates in inverse proportion to the square of the distance from the light emitting element 2301 to the object 300.

Next, when θ = 0, a method for detecting proximity of OVF and EVF with the same detection sensitivity as when EVF is not mounted will be described. In the present embodiment, controlling the light emission intensity P of the light emitting element 2301 will be described as an example. That is, by controlling P, it is achieved that the received light amount E becomes E = E ₀ when D ′ ₁ = D ′ ₂ = D ′ ₀ .

First, the transmittance D ₁ ² / (D ₁ ² + D ₂ ² ) so that the received light amounts of the transmission detection light and the reflection detection light when θ = 0 and D ′ ₁ = D ′ ₂ = D ′ ₀ are equal. A dichroic mirror 406 having a reflectance D ₁ ² / (D ₁ ² + D ₂ ² ) is used.

If the light emission intensity P when θ = 0 is P ₀ , the received light amount E when D ′ ₁ = D ′ = D ′ ₀ is expressed by the following equation.

E = E ₀ × (D ₁ ² + D ₀ ² ) / (D ₁ ² + D ₂ ² )
Therefore, the light emission intensity P and the light emission gain g are set to P = g × P _0.
g = (D ₁ ² + D ₂ ² ) / (D ₁ ² + D ₀ ² )
, E = E ₀ , and the proximity detection of OVF and EVF can be performed with the same detection sensitivity as when EVF is not mounted.

  FIG. 6 is an explanatory diagram of the proximity detection system when the EVF is mounted when θ ≠ 0.

  FIG. 6A is an explanatory diagram in the case where the object 300 faces the OVF eyepiece optical axis, and shows an OVF proximity detection system.

EVF when mounted, the conditions to be satisfied in order to proximity detection of the OVF by the detection sensitivity equivalent to EVF is not mounted, when the D _'1 = D' _0, that the received light amount E is E = _{E 0} is there. As in the case of θ = 0, the light emission gain g ₁ that satisfies this condition is calculated from D ₁ and D ₂ .

  FIG. 6B is an explanatory diagram in the case where the object 300 faces the EVF eyepiece optical axis, and shows an EVF proximity detection system.

EVF when mounted, the conditions to be satisfied in order to proximity detection of the EVF by the detection sensitivity equivalent to EVF is not mounted, when the D _'2 = D' _0, that the received light amount E is E = _{E 0} is there. As in the case of θ = 0, the light emission gain g ₂ that satisfies this condition is calculated from D ₁ and D ₂ .

  FIG. 7 is a diagram illustrating an example of emission intensity control with respect to the angle of the EVF eyepiece optical axis. The horizontal axis of the graph is the angle θ of the EVF eyepiece optical axis, and the vertical axis is the light emission gain g. The light emission gain is expressed by the following equation.

g = g ₁ + g ₂
D ₀ = 70 mm, D ′ ₀ = 60 mm, and when θ = 0, d ₁ = 5 mm, d ₂ = 65 mm, d ₃ = 10 mm, and d ₄ = 65 mm.

  When parameters are set as described above and the emission intensity P is controlled using g shown in FIG. 7, proximity detection of OVF and EVF can be performed with the detection sensitivity almost the same as when EVF is not installed when EVF is installed. Is possible.

  The error in detection sensitivity when the EVF is mounted and when the EVF is not mounted varies depending on the above parameters. In the present embodiment, the case where the same light emission gain g is used regardless of the photographing mode described later has been described, but when the detection sensitivity error is large, a different light emission gain g may be used depending on the photographing mode.

  FIG. 8 is a flowchart showing the photographing operation.

  When the camera is turned on in step S01, the process proceeds to step S02. Step S01 is repeated until the camera is turned on.

  In step S <b> 02, the CPU 225 determines whether the EVF 400 is attached to the camera 200 based on information from the accessory base 240. When the EVF 400 is attached to the camera 200, the process proceeds to step S03. On the other hand, if the EVF 400 is not attached to the camera 200, the process proceeds to step S04.

  In step S03, the EVF angle detector 409 detects the rotation angle θ of the EVF eyepiece optical axis. Information on the rotation angle θ of the EVF eyepiece optical axis detected by the EVF angle detector 409 is transmitted to the CPU 225 via the EVF base 401 and the accessory base 240. When the information about the rotation angle θ of the EVF eyepiece optical axis is transmitted to the CPU 225, the process proceeds to step S04.

In step S04, the CPU 225 determines the light emission intensity P of the light emitting element 2301. If EVF400 is attached to the camera 200, CPU 225 determines the light emission intensity P to P = g × _{P 0.} However, the light emission gain g is determined by the rotation angle θ of the EVF eyepiece optical axis received by the CPU 225 and the curve of FIG. 7 stored in the EEPROM 226. On the other hand, if the EVF400 is not attached to the camera 200, CPU 225 determines the light emission intensity P to P = _{P 0.} When the light emission intensity P is determined, the process proceeds to step S05.

  In step S05, the CPU 225 determines the shooting mode. When the photographing mode change button (not shown) is not pressed by the photographer, the CPU 225 determines that the OVF photographing mode is set, and proceeds to step S06. On the other hand, when a shooting mode change button (not shown) is pressed by the photographer, the CPU 225 determines that the shooting mode is the LV (live view) shooting mode, and proceeds to step S10.

  In step S06, the rear display unit 227 displays various types of shooting information. When the rear display unit 227 displays various shooting information, the process proceeds to step S07.

In step S07, the CPU 225 performs proximity detection. The detection light is emitted by the light emitting element 2301 with the emission intensity P, reflected by the object 300, and received by the light receiving element 2302. If the amount of light E received by the light receiving element 2302 is E ≧ E _{0 with} respect to the threshold value E ₀ , the CPU 225 determines that it is in the proximity state, and proceeds to step S 08. On the other hand, if E <E _0, the CPU 225 determines that it is not in the proximity state, and proceeds to step S16.

  In step S08, the rear display unit 227 is not displayed. When the rear display unit 227 is not displayed, the process proceeds to step S09.

  In step S09, the OVF display unit 2103 displays various types of shooting information. When the in-OVF display unit 2103 displays various types of shooting information, the process proceeds to step S16.

  In step S10, a mirror up operation is performed under the control of the CPU 225. When the main mirror 201 and the sub mirror 202 are retracted to the second position, the process proceeds to step S11.

  In step S <b> 11, the rear display unit 227 displays an image captured by the imaging sensor 224 and various types of shooting information. When the rear display unit 227 displays, the process proceeds to step S12.

  In step S <b> 12, as in step S <b> 02, the CPU 225 determines whether the EVF 400 is attached to the camera 200 based on information from the accessory base 240. When the EVF 400 is attached to the camera 200, the process proceeds to step S13. On the other hand, if the EVF 400 is not attached to the camera 200, the process proceeds to step S16.

In step S13, as in step S07, the CPU 225 performs proximity detection. If E ≧ E _0, the CPU 225 determines that it is in the proximity state, and proceeds to step S14. On the other hand, if E <E _0, the CPU 225 determines that it is not in the proximity state, and proceeds to step S16.

  In step S14, as in step S08, the rear display unit 227 is not displayed. When the rear display unit 227 is not displayed, the process proceeds to step S15.

  In step S15, the EVF display unit 402 displays an image captured by the image sensor 224 and various types of shooting information. When the in-EVF display unit 402 displays, the process proceeds to step S16.

  In step S16, the CPU 225 determines whether or not the release button has been half-pressed by the photographer (SW1 is ON). If the release button is pressed halfway, the process proceeds to step S16. On the other hand, if the release button is not pressed halfway, the process proceeds to step S05.

  In step S17, a focus adjustment operation is performed under the control of the CPU 225. The focus adjustment operation is performed by automatically driving the focus lens 101 to the focus position with respect to the subject based on the output signal of the subject image acquired by the focus detection device 203 by the phase difference detection method. When the focus adjustment operation is completed, the process proceeds to step S18.

  In step S18, an exposure control operation is performed under the control of the CPU 225. The exposure control operation is performed based on the output signal of the subject image acquired by the photometric sensor 222, the control value of an aperture stop (not shown) in the lens unit 100, the shutter speed control value of the focal plane shutter 204, or the image sensor 205. The light receiving sensitivity is set. When the exposure control operation is completed, the process proceeds to step S19.

  In step S19, the CPU 225 confirms whether or not the release button has been fully pressed by the photographer (whether SW2 is ON). If it is confirmed that the release button has been fully pressed, the process proceeds to step S20. Step S19 is repeated until it is confirmed that the release button has been fully pressed.

  In step S20, a photographing operation is performed under the control of the CPU 225. The CPU 225 transmits signals to a shutter control unit, a diaphragm driving unit, and an image sensor control unit (not shown). The image sensor 205 photoelectrically converts the subject image projected by the lens unit 100 and outputs an analog signal. The analog signal output to the image sensor 205 is processed by an image sensor control unit and an image processing unit (not shown), and a captured image is generated. When the shooting operation is completed, the entire camera flow is completed.

  As described above, the light intensity P of the light emitting element 2301 is controlled in accordance with the rotation angle θ of the EVF eyepiece optical axis, thereby suppressing an increase in cost and an optical viewfinder with a substantially constant detection sensitivity. In addition, proximity detection of the electronic viewfinder is possible.

  Although the present invention has been described together with the embodiments, the above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention is interpreted in a limited manner by these. It must not be. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

For example, in the above embodiment, the proximity detection of the optical viewfinder and the electronic viewfinder with the substantially constant detection sensitivity by controlling the light emission intensity P of the light emitting element 2301 has been described. However, the present invention is not limited to this, and can be achieved by controlling not the light emission intensity P of the light emitting element 2301 but the threshold value E ₀ for determining the light receiving sensitivity or the light receiving amount of the light receiving element 2302.

(Other embodiments)
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

100 lens units, 200 cameras,
210 optical viewfinder (OVF), 230 proximity detection unit,
2301 Light emitting element, 2302 Light receiving element, 300 Object,
400 electronic viewfinder (EVF), 406 dichroic mirror,
407 Movable mirror, 409 Angle detector

Claims (5)

An imaging system having an imaging device (200) and an electronic viewfinder (400) detachable from the imaging device,
The imaging device
An optical viewfinder (210);
A light emitting means (2301) for emitting detection light;
A light receiving means (2302) for receiving the detection light reflected by the object (300) outside the imaging device;
Proximity determination means for determining whether or not the object is close to the optical viewfinder based on a light reception result by the light receiving means based on a predetermined threshold;
Have
The electronic viewfinder is
An eyepiece optical axis rotatable with respect to the imaging device;
Optical path dividing means (406) for dividing the detection light into reflected light and transmitted light;
Light guiding means (407) for guiding the reflected light in parallel with the eyepiece optical axis;
Angle detection means for detecting a rotation angle of the eyepiece optical axis;
Have
The imaging apparatus controls to change at least one of the intensity of the detection light, the light receiving sensitivity of the light receiving means, or the threshold based on the rotation angle detected by the angle detecting means (409). An imaging system comprising means.   The imaging system according to claim 1, wherein the light guiding unit is a mirror that rotates according to the rotation angle.   The imaging system according to claim 1, wherein the optical path dividing unit is any one of a dichroic mirror, a polarization beam splitter, and a half mirror. An imaging device capable of detachably holding an electronic viewfinder,
The imaging device
An optical viewfinder,
A light emitting means for emitting detection light;
A light receiving means for receiving the detection light reflected by an object outside the imaging device;
Proximity determination means for determining whether or not the object is close to the optical viewfinder based on a light reception result by the light receiving means based on a predetermined threshold;
Have
The electronic viewfinder is
An eyepiece optical axis rotatable with respect to the imaging device;
Optical path dividing means for dividing the detection light into reflected light and transmitted light;
A light guiding means for guiding the reflected light in parallel with the eyepiece optical axis;
Angle detection means for detecting a rotation angle of the eyepiece optical axis;
Have
The imaging apparatus includes a control unit that changes at least one of the intensity of the detection light, the light reception sensitivity of the light receiving unit, or the threshold value based on the rotation angle detected by the angle detection unit. An imaging apparatus characterized by that. An electronic viewfinder that is detachable from an imaging device and has an eyepiece optical axis that is rotatable with respect to the imaging device,
The imaging device
An optical viewfinder,
A light emitting means for emitting detection light;
A light receiving means for receiving the detection light reflected by an object outside the imaging device;
Proximity determination means for determining whether or not the object is close to the optical viewfinder based on a light reception result by the light receiving means based on a predetermined threshold;
Have
The electronic viewfinder is
Optical path dividing means for dividing the detection light into reflected light and transmitted light;
A light guiding means for guiding the reflected light in parallel with the eyepiece optical axis;
Angle detection means for detecting a rotation angle of the eyepiece optical axis;
Have
The imaging apparatus includes a control unit that changes at least one of the intensity of the detection light, the light reception sensitivity of the light receiving unit, or the threshold value based on the rotation angle detected by the angle detection unit. An electronic viewfinder characterized by that.