JP2019095631A - Imaging apparatus, lens device and imaging apparatus system - Google Patents

Abstract

To provide an imaging apparatus capable of: appropriately illuminating with an interchangeable lens having an illumination light source for illuminating a subject, in which such appropriate illumination has been difficult while maintaining compatibility with conventional models, due to a necessity for both a camera main body and the interchangeable lens having the illumination light source being communicative to information on illumination; and obtaining a timing for illumination from a camera main body not compatible with the interchangeable lens having the illumination light source even if the interchangeable lens is attached to the camera main body.SOLUTION: An imaging apparatus includes a camera main body and an interchangeable lens attachable to/detachable from the camera main body. The interchangeable lens having an illumination light source is configured to determine whether or not to illuminate the illumination light source from status information on the interchangeable lens.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an imaging device such as a camera system in which an interchangeable lens is detachable, and more particularly to an interchangeable lens having an illumination light source.

  In a camera system in which the interchangeable lens can be attached and removed, macro shooting is performed in which the lens barrel of the lens is brought close to the subject for shooting, but at that time the lens barrel of the lens blocks ambient light and shadows appear in the photographed photos. There were times when it was reflected and it became dark.

  For example, Patent Document 1 discloses the following technical contents. An illumination light source is disposed at the tip of the interchangeable lens, and by turning on the illumination at the time of macro photographing, it is possible to photograph an object brightly and clearly without the need for accessories such as a flash.

  Patent Document 2 discloses the following technical contents. In the interchangeable lens in which the illumination light source is disposed at the tip as in Patent Document 1, when the shutter speed is slower than the hand-held shooting limit speed, the macroscopic light source can be made to emit light automatically for easy macro shooting It has been realized.

Unexamined-Japanese-Patent No. 2001-27780 Unexamined-Japanese-Patent No. 2007-47192

  However, in Japanese Patent Application Laid-Open Nos. 2007-47192 and 2007-47192, it is necessary for the interchangeable lens having the camera body and the illumination light source to be mutually compatible with the communication of information related to the illumination light source. , It was difficult to do proper lighting. When the interchangeable lens having the illumination light source is attached to the camera body not compatible with the interchangeable lens having the illumination light source, it is not possible to acquire the timing of lighting from the camera body.

  Therefore, an object of the present invention is to provide an interchangeable lens capable of performing illumination at an appropriate timing even when the interchangeable lens having an illumination light source is mounted on a camera body not compatible with the interchangeable lens having an illumination light source. It is to be.

  In order to achieve the above object, according to the present invention, in an imaging device comprising a camera body and an interchangeable lens detachable from the camera body, whether or not the interchangeable lens having an illumination light source emits the illumination light source Is determined from the status information of the interchangeable lens. The interchangeable lens detects whether or not the camera body is compatible with the interchangeable lens having the illumination light source when the camera body is mounted, and the camera body is compatible if the camera body is compatible. Lighting the illumination light source in accordance with an instruction from.

  According to the present invention, it is possible to obtain a bright and clear photographed image without the need for troublesome operations in macro photography in which the lens barrel of the lens is brought close to the subject and photographing is performed. It becomes.

Configuration diagram of an embodiment of the present invention Flow chart when the interchangeable lens detects macro ring light compatible / non-compliant and switches the mode A flowchart for the interchangeable lens to determine whether to cause the illumination light source to emit light according to the position of the focus lens when mounted on a macro ring light incompatible camera A flowchart for the interchangeable lens to determine whether the illumination light source emits light according to the state of the release button of the camera body when mounted on a macro ring light incompatible camera A flowchart for the interchangeable lens to determine whether or not the illumination light source is made to emit light by the signal of the gyro inside the interchangeable lens when mounted on a macro ring light incompatible camera A flowchart for disabling the illumination light source of the interchangeable lens when mounted on a macro ring light incompatible camera Display part of macro ring light compatible camera When mounted on a macro ring light compatible camera, the interchangeable lens emits an illumination light source according to a command from the camera body

Example 1
FIG. 1 is a block diagram of an image pickup apparatus including a camera body according to an embodiment of the present invention and an interchangeable lens that is detachable from the camera body. The interchangeable lens 100 is detachably connected to the camera body 200 via a mount 300.

  The interchangeable lens 100 has a photographing optical system. The photographing optical system is composed of a plurality of optical lens units, and forms an optical image of an object (object). The photographing optical system of this embodiment includes, in order from the incident direction of the object image, a field lens 101, a zoom lens 102 as a variable power lens, an aperture unit 105 for adjusting the light quantity, an afocal lens 103, and a focus lens 104 as a focusing lens. Have. A lens configuration in which the focus lens 104 is disposed rearward when viewed from the object side in this manner is called a rear focus lens, and is generally used in a small interchangeable lens camera or the like.

  A zoom lens 102 which moves in the optical axis direction to change the focal length and a focus lens 104 which moves in the optical axis direction to adjust the focus are held by lens holding frames 106 and 107, respectively. The lens holding frames 106 and 107 are configured to be movable in the optical axis direction by the guide axes, and the zoom lens and the focus lens are moved in the optical axis direction by the actuators 110 and 111.

  The lens control unit 120 includes a lens microcomputer 121, a power supply unit 122, and a communication unit 123, and performs various controls corresponding to commands transmitted from the camera body 200, which will be described later. The lens microcomputer 121 controls the driving of the photographing optical system according to a control signal supplied from the camera microcomputer 211 via the communication units 213 and 123. Further, control is performed according to an input from operation instruction means such as a focus ring 130 provided on the lens barrel of the interchangeable lens 100, and controls the overall operation of the interchangeable lens 100. The amount of rotation of the focus ring 130 is detected by the detection unit 131.

  The actuator 110 is a cam mechanism in which the zoom lens 102 moves along a mechanical groove, and performs zoom magnification operation of the imaging optical system. The position detection circuit 113 detects the amount and position of movement of the zoom lens 102 in the optical axis direction by the rotation of the zoom ring provided on the barrel of the interchangeable lens 100 (not shown), and supplies information to the lens microcomputer 121.

  The actuator 111 is driven by the drive circuit 114. The drive circuit 114 drives the actuator 111 in accordance with the drive signal input from the lens microcomputer 121. That is, the focus focusing operation accompanying the zoom magnification operation of the imaging optical system is performed by controlling the actuator 111 by an electronic cam system using cam locus data generally used in digital cameras and the like. The lens microcomputer 121 gives a drive signal to control the drive means.

  The diaphragm unit 105 for adjusting the light quantity has diaphragm blades 105a and 105b. The states of the diaphragm blades 105 a and 105 b are detected by the photo interrupter 116. The lens microcomputer 121 outputs a control signal from the drive circuit 115 based on the input signal. The drive circuit 115 drives the diaphragm actuator 112 based on the control signal.

  The camera body 200 includes an image sensor 201 such as a CCD sensor or a CMOS sensor that photoelectrically converts an optical image formed by a photographing optical system, an A / D conversion circuit 202, a signal processing circuit 203, a recording medium 204, a memory 205, and a display unit 206. , An operation input unit 207, a camera control unit 210, a camera microcomputer 211, a power supply unit 212, and a communication unit 213.

  The optical image that has passed through the interchangeable lens 100 is converted into an electrical signal (analog signal) by photoelectric conversion in the imaging device 201. The analog signal is converted into a digital signal by the A / D conversion circuit 202 and input to the signal processing circuit 203. The signal processing circuit 203 performs various types of image processing on the input electronic signal (digital signal) to generate focus information representing the in-focus state of the image, and generates luminance signal information representing the exposure state, Conversion to a recordable data format is performed.

  Thereafter, an output signal (video signal) from the signal processing circuit 203 is sent to the recording medium 204, and the video signal is recorded on the recording medium 204. At the same time, the subject image generated by the signal processing circuit 203 is displayed on the display unit 206, and it is possible to confirm the composition and in-focus state of the subject image being photographed. The display unit 206 further displays a menu screen operated by the photographer.

  The camera microcomputer 211 controls the camera body according to the input from the operation input unit 207 such as a photographing instruction switch, a menu screen, and a camera setting related switch. Further, the camera microcomputer 211 instructs the lens microcomputer 121 to drive the diaphragm unit 105 and the focus lens 104, control settings of the focus ring 130, operation request to the interchangeable lens 100, and setting.

  The interchangeable lens 100 and the camera body 200 are mechanically and electrically connected by a mount 300. Both are able to communicate via the terminal part of the mount 300. The lens microcomputer 121 and the camera microcomputer 211 communicate in synchronization with the control reference signal via the terminal units 310, 311 and 312. In addition, the interchangeable lens 100 learns the power from the camera body 200 through the terminal portions 301, 302, 303, and 304, and consumes it as drive power of various actuators 110, 111, and 112, processing power of the lens microcomputer 121, and the like. There is.

  Hereinafter, the present invention will be described. In addition to the above description, the interchangeable lens 100 has an illumination light source 401. The illumination light source 401 is disposed at a position at which light can be emitted in the optical axis direction, and is configured of a light emitting diode (LED) and a resistor that controls the amount of light emission. It is possible to shine brightly.

  FIG. 2 is a flowchart of determining whether the interchangeable lens 100 is attached to a camera corresponding to the interchangeable lens having an illumination light source. When the interchangeable lens 100 having the illumination light source 401 is attached to the camera body 200 (S101), the interchangeable lens 100 having the macro ring light determines whether the camera body corresponds to the interchangeable lens having the illumination light source 401 from the camera body judge. If the camera body 200 does not receive information indicating that it is compatible with the interchangeable lens having the illumination light source 401, switching to the macro ring light non-compliant camera mode is performed to determine whether the illumination light source is made to emit light based on the status information of the interchangeable lens 100 (S104).

  When the mode switching is completed, the mode switching sequence is ended (S106). FIG. 3 is a flowchart of determining whether to cause the illumination light source 401 to emit light according to the state of the focus lens 104. When shooting is started in the macro ring light incompatible camera mode (S201), the lens microcomputer 121 of the interchangeable lens 100 monitors the position of the focus lens 104. When the position of the focus lens 104 of the interchangeable lens 100 is equal to or less than a predetermined value, that is, when the position detection circuit 113 detects that the object is close to the object (S202), the lens microcomputer 121 causes the illumination light source 401 to emit light (S203). .

  Furthermore, when the illumination light source 401 emits light, if the position of the focus lens 104 of the interchangeable lens 100 becomes equal to or greater than a predetermined value, that is, if the position detection circuit 113 detects that the object has moved away from a close distance to some extent (S204) , And the lens microcomputer 121 turns off the illumination light source 401 (S205).

  As described above, even when the interchangeable lens mounted with the macro ring light is attached to the camera body not compatible with the macro ring light, the illumination light source 401 is selected according to the state of the focus lens 104 without depending on the communication from the camera body. By determining whether or not to emit light, it is possible to turn on the macro ring light at a necessary timing without requiring a user performing macro shooting to perform complicated operations.

Example 2
The configurations of the camera body 200 and the interchangeable lens 100 of the present embodiment are the same as those of the first embodiment, and the reference numerals used in FIG. 1 will be used for the description. FIG. 4 is a flowchart of determining whether the illumination light source 401 is caused to emit light according to the state of the release button (a part of the operation input unit 207 of the camera body 200). The state of the release button is not the state information of the interchangeable lens 100 but the state information of the camera body 200, but even if the camera body is not compatible with the macro ring light, the interchangeable lens 100 conventionally grasps the state of the release button There is.

  When shooting is started in the macro ring light incompatible camera mode (S301), the lens microcomputer 121 of the interchangeable lens 100 monitors the state of the release button. When the lens microcomputer 121 determines that the release button has been half-pressed (S302), it causes the illumination light source 401 to emit light (S303). Furthermore, when the lens microcomputer 121 determines that the release button is released in a state where the illumination light source 401 emits light (S304), the illumination light source 401 is turned off.

  As described above, even when the interchangeable lens mounted with the macro ring light is attached to the camera body not compatible with the macro ring light, it is determined whether the illumination light source 401 is caused to emit light according to the state of the release button. The macro ring light can be turned on at a necessary timing without requiring a user who performs macro photographing to perform complicated operations.

[Example 3]
The configurations of the camera body 200 and the interchangeable lens 100 of the present embodiment are the same as those of the first embodiment, and the reference numerals used in FIG. 1 will be used for the description. FIG. 5 is a flowchart of determining whether the illumination light source 401 is caused to emit light by the signal of the gyro 117 (or an acceleration sensor (not shown)) inside the interchangeable lens 100. The gyro 117 is usually used to correct camera shake in the interchangeable lens 100, but in this embodiment it is used to determine whether the illumination light source 401 emits light based on the signal of the gyro 117. When shooting is started in the macro ring light incompatible camera mode (S401), the lens microcomputer 121 of the interchangeable lens 100 monitors the signal of the gyro 117.

  Triggered by the fact that the lens microcomputer 121 determines that the signal of the gyro 117 exceeds a certain threshold and that a large shake different from normal shaking is applied to the interchangeable lens 100 (S402), the interchangeable lens 100 uses the illumination light source 401 as a trigger. The light is emitted (S403). Further, in a state where the illumination light source 401 is emitting light, the illumination light source 401 is turned off by using the fact that the lens microcomputer 121 determines that the large swing is applied to the interchangeable lens 100 as described above (405).

  As described above, even when the interchangeable lens mounted with the macro ring light is attached to the camera body not compatible with the macro ring light, the illumination light source 401 is caused to emit light by the signal of the gyro without depending on the communication from the camera body. It is determined whether or not. As a result, the macro ring light can be turned on / off only by intentionally shaking the lens large, without requiring a user performing macro photography to perform complicated operations.

Example 4
The configurations of the camera body 200 and the interchangeable lens 100 of the present embodiment are the same as those of the first embodiment, and the reference numerals used in FIG. 1 will be used for the description. FIG. 6 is a flowchart of determining the camera body and determining whether to turn on the macro ring light by the function of the camera body when the interchangeable lens 100 is attached to the macro ring light incompatible camera. When shooting is started in the macro ring light incompatible camera mode (S501), the interchangeable lens 100 determines the camera body 200, and determines whether a strobe is built in the camera body 200 (S502).

  If it is determined that the flash unit is built in the camera body 200, the interchangeable lens 100 always turns off the macro ring light (S503). If it is determined in S502 that no flash is built in the camera body 200, the macro ring light is always turned on (S504).

  As described above, even when the interchangeable lens equipped with the macro ring light is attached to the camera body not compatible with the macro ring light, the interchangeable lens determines the camera body and lights the macro ring light by the function of the camera body It is determined whether or not. Also, the macro ring light may be determined to be on / off without depending on the function of the camera body. It is possible to prevent the interchangeable lens from performing an unintended operation of the camera body by deciding whether to permit or prohibit the lighting of the macro ring light according to the type of camera body to be attached in advance.

[Example 5]
The configurations of the camera body 200 and the interchangeable lens 100 of this embodiment are the same as those of Embodiment 1, and the reference numerals used in FIG. 1 will be used for the description. FIG. 2 is a flowchart of determining whether the interchangeable lens 100 is attached to a camera corresponding to the interchangeable lens having an illumination light source. When the interchangeable lens 100 having the illumination light source 401 is attached to the camera body 200 (S101), the information that the camera body 200 is compatible with the interchangeable lens having the illumination light source is given to the interchangeable lens 100. Send.

  The interchangeable lens 100 receives this information (S102), and switches to a macro ring light compatible camera mode that causes the illumination light source 401 to emit light according to an instruction from the camera body 200 (S103). Further, the interchangeable lens 100 transmits the information switched to the macro ring light compatible camera mode to the camera body (S103). When the camera body receives the information that the interchangeable lens 100 has switched to the macro ring light compatible camera mode, the camera body switches to the macro ring light compatible camera mode (S105).

  When the camera body is switched to the macro ring light compatible camera mode, the macro ring light ON / OFF / AUTO switching button 206a is displayed on the display unit 206 of the camera body as shown in FIG. By pressing the switching button 206a, it is possible to switch between the constant lighting mode, the constant lighting off mode and the automatic mode of the macro ring light.

  FIG. 8 is a flowchart in the case where both the interchangeable lens 100 and the camera body 200 are in the macro ring light compatible camera mode. When shooting is started with both the interchangeable lens 100 and the camera body 200 in the macro ring light compatible camera mode (S 701), the interchangeable lens 100 emits the illumination light source 401 according to a command from the camera body 200. First, the interchangeable lens 100 determines the macro ring light emission mode set in the camera body 200 (S702). If the light emission mode is the auto mode, it waits for the timing at which the release button of the camera body 200 is pressed (S703).

  When the release button is pressed as a trigger, the camera body 200 issues a pre-flash command to the interchangeable lens 100 (S704). The interchangeable lens 100 that has received the pre-emission instruction causes the illumination light source 401 to emit a flash (S705).

  While the illumination light source 401 of the interchangeable lens 100 emits flash light, the camera body 200 performs photometry, and calculates exposure such as shutter speed and aperture value (S706). As soon as the exposure has been calculated, the camera body 200 issues a main light emission command to the interchangeable lens 100 (S 707). In response to the main light emission command received from the camera body 200, the interchangeable lens 100 causes the illumination light source 401 to emit light, while the camera body 200 performs photographing processing (S708). After shooting, the camera body 200 performs signal processing and the like, and ends the shooting sequence (S709).

  If the constant lighting mode is selected in S702, the interchangeable lens 100 causes the illumination light source 401 to be always lit (S710). The interchangeable lens 100 keeps emitting the illumination light source 401 until it receives a mode switching command from the camera body 200. When the mode switching command is received from the camera body 200, the interchangeable lens 100 turns off the macro ring light and switches the mode (S712).

  When the always-off mode is selected in S702, the interchangeable lens 100 always turns off the illumination light source 401. The interchangeable lens 100 keeps turning off the illumination light source 401 until it receives a mode switching command from the camera body 200. When the mode switching command is received from the camera body 200, the interchangeable lens 100 switches the mode (S715).

  As described above, when the camera body corresponds to the interchangeable lens mounted with the macro ring light, the interchangeable lens emits and extinguishes the illumination light source 401 according to the instruction of the camera body. As a result, it is possible to turn on the macro ring light at an appropriate timing without requiring a user performing macro photography to perform any complicated operation.

  As mentioned above, although the preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

100: Interchangeable lens 200: Camera body 206: Display unit 401: Illumination light source

Claims (3)

  A determination unit that determines whether the interchangeable lens having an illumination light source emits light from the illumination light source based on state information of the interchangeable lens in an imaging device including a camera body and an interchangeable lens that is detachable from the camera body. An interchangeable lens characterized by having:   In an imaging device comprising a camera body and an interchangeable lens detachable from the camera body, the interchangeable lens includes an illumination light source, and the interchangeable lens including the illumination light source is an interchangeable lens including the illumination light source as the camera body The camera according to claim 1, further comprising: detection means for detecting whether or not the camera body corresponds to the camera body, and means for emitting the illumination light source according to an instruction from the camera body when the corresponding camera body is detected. Interchangeable lens described in.   In an imaging apparatus comprising a camera body and an interchangeable lens detachable from the camera body, the interchangeable lens has an illumination light source, and the camera body detects that the interchangeable lens having the illumination light source is attached An imaging device characterized in that the camera body comprises means for emitting the illumination light source of the interchangeable lens having the illumination light source.