WO2018179319A1 - Dispositif d'appareil photographique et dispositif de lentille - Google Patents

Dispositif d'appareil photographique et dispositif de lentille Download PDF

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Publication number
WO2018179319A1
WO2018179319A1 PCT/JP2017/013563 JP2017013563W WO2018179319A1 WO 2018179319 A1 WO2018179319 A1 WO 2018179319A1 JP 2017013563 W JP2017013563 W JP 2017013563W WO 2018179319 A1 WO2018179319 A1 WO 2018179319A1
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WO
WIPO (PCT)
Prior art keywords
lens
iris
connector
pin
connection terminals
Prior art date
Application number
PCT/JP2017/013563
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English (en)
Japanese (ja)
Inventor
立奇 賀来
恒美 新倉
Original Assignee
Cbc株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cbc株式会社 filed Critical Cbc株式会社
Priority to PCT/JP2017/013563 priority Critical patent/WO2018179319A1/fr
Priority to TW107105311A priority patent/TW201901277A/zh
Publication of WO2018179319A1 publication Critical patent/WO2018179319A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

Definitions

  • the present invention relates to a camera device that is used by being mounted with a lens device having an automatic iris function, and a lens device that is mounted on the camera device.
  • IP cameras network cameras
  • CCTV Cell-circuit Television
  • FA factory automation
  • a compatible lens mount such as a C mount or a CS mount
  • a single focus lens or a variable focus lens such as a zoom lens or a varifocal lens
  • Those configured to be worn are known.
  • a lens device mounted on the lens mount of the camera device there is one configured with an automatic iris function.
  • a lens device having an automatic iris function there are known a video iris lens that controls the iris by the video iris control method and a DC iris lens that performs the iris control by the DC iris control method.
  • a so-called P-iris lens that enables control is proposed (see, for example, Patent Document 1).
  • an intelligent CCTV camera lens hereinafter referred to as an “i-CS lens” that can realize not only aperture control but also zoom and focus with high-precision control through bidirectional communication between the camera and the lens. (Also referred to as “Patent Document 2”).
  • JP2011-164614A Japanese Patent No. 5893746
  • a camera device to which a lens device having an automatic iris function is mounted includes a connector for electrically connecting the camera and the lens, and a control instruction (control signal) relating to the iris of the lens device is given through the connector. It is like that. Therefore, when the camera device is a single-function product that supports only one type of lens device, the corresponding type of lens device needs to be electrically connected through a connector. Further, if the camera device is compatible with a plurality of types of lens devices, it is necessary to perform switch switching on the camera device side so as to be compatible with the connected types of lens devices.
  • the connector shape is the same for a video iris lens and a DC iris lens.
  • the P-iris lens and the i-CS lens there are some in which a concave and convex portion for preventing erroneous insertion is provided in the connector housing, but this is not necessarily applied to all.
  • an object of the present invention is to provide a camera device and a lens device that can accurately and easily determine the lens type.
  • a camera device is provided.
  • a lens device mounted on a lens mount of a camera device An automatic iris function that adjusts the iris opening amount by motor driving in accordance with a control instruction from the camera device side;
  • the status for the other plurality of connection terminals is configured to be unique to the lens type having the automatic aperture function.
  • a lens device is provided.
  • the camera system includes a lens device 1 and a camera device 2.
  • the lens device 1 is used by being mounted on the camera device 2. If the lens device 1 can be attached to the lens mount 2a included in the camera device 2 (that is, compatible with compatibility), a single focus lens or a variable focus lens (zoom lens or varifocal lens). Etc.).
  • the lens apparatus 1 includes an iris adjustment unit 1a for realizing an automatic iris (auto iris) function.
  • the iris adjusting unit 1a adjusts the diaphragm of the lens device 1 (that is, adjusts the amount of light transmitted through the lens device 1), and is configured to be linearly slidable on a substrate having an opening that forms an optical path.
  • the diaphragm blades are provided, and the amount of light is adjusted by controlling the sliding amount of the diaphragm blades by driving the motor.
  • the iris blades of the iris adjusting unit 1a are two, but the number is not limited to this, and may be five or seven.
  • the drive control of the diaphragm blades is not necessarily performed by motor driving, and may be performed by, for example, galvanometer driving.
  • the control method for the iris adjustment unit 1a may be any of video iris, DC iris, P iris, or i-CS.
  • video iris control system power and a video signal are supplied from the camera device 2 side, and the lens device 1 side controls a motor drive signal or a galvanometer drive signal based on the video signal, thereby adjusting the aperture. It is a method to do.
  • DC iris control method an iris control signal is generated from a video signal on the camera device 2 side, and the control signal is supplied to the lens device 1 side to adjust the iris.
  • the P-iris control system is a system that enables highly precise aperture control by a stepping motor and enables accurate control of light amount adjustment (that is, adjustment of the size of the opening).
  • the i-CS control method is an intelligent control method that enables high-precision control through bidirectional communication between the camera and the lens. That is, the lens device 1 having the automatic iris function may be a video iris lens, a DC iris lens, a P iris lens, or an i-CS lens.
  • the camera device 2 is used as, for example, a camera device for surveillance or industrial use, and includes an IP camera, a CCTV camera, an FA camera, and the like. In the following description, a case where the camera device 2 is a CCTV camera is taken as an example, but the present invention is not limited to this.
  • the camera device 2 includes a lens mount 2a such as a C mount or CS mount to which the lens device 1 is attached, and a CCD (Charge Coupled Device) that captures an optical image obtained through the lens device 1 attached to the lens mount 2a.
  • a lens mount 2a such as a C mount or CS mount to which the lens device 1 is attached
  • CCD Charge Coupled Device
  • Sensor and imaging element 2b such as a CMOS (Complementary Metal Metal Oxide Semiconductor) sensor.
  • CMOS Complementary Metal Metal Oxide Semiconductor
  • the camera device 2 includes a connector 2c that is electrically connected to the lens device 1 mounted on the lens mount 2a, and a lens determination unit 2d that determines the type of the lens device 1 that is electrically connected to the connector 2c. It is equipped with. The specific configurations of the connector 2c and the lens determination unit 2d will be described later in detail.
  • the camera device 2 includes a central control unit 2e made of a control board or the like having a function as a computer in the camera device 2.
  • the central control unit 2e performs overall operation control of the camera device 2. It is assumed that the operation control performed by the central control unit 2e includes operation control for the lens device 1 mounted on the lens mount 2a, particularly operation control for the iris adjustment unit 1a provided in the lens device 1. That is, the central control unit 2e includes an iris circuit 2f that performs operation control on the iris adjustment unit 1a.
  • the iris circuit 2f can selectively correspond to each of a video iris lens, a DC iris lens, a P iris lens, and an i-CS lens.
  • a function as a video iris circuit that performs aperture control by a video iris control system a function as a DC iris circuit that performs aperture control by a DC iris control system, and an aperture control by a P iris control system
  • a function as a P-iris circuit that performs the above and a function as an i-CS lens circuit that performs aperture control by the i-CS control method and to switch these functions for use. .
  • the iris circuit 2f is not limited to such a configuration, and is configured to correspond to any one of a video iris lens, a DC iris lens, a P iris lens, or an i-CS lens. May be. In other words, the iris circuit 2f only needs to be configured to perform aperture control for at least one of a video iris lens, a DC iris lens, a P iris lens, or an i-CS lens.
  • the camera device 2 includes a switching circuit 2g.
  • the switching circuit 2g performs switching of each function when the iris circuit 2f is configured to switch and use the above functions as appropriate.
  • the switching circuit 2g is configured so that the function when the iris circuit 2f performs aperture control is adapted to the lens type based on the determination result of the lens type in the lens determination unit 2d. It is designed to switch.
  • the specific configuration of the switching circuit 2g is not particularly limited as long as it can cope with the function switching in the iris circuit 2f.
  • the connector 2c is fitted with a connector plug or a connector socket disposed on an end edge of an electric cable extending from the lens device 1 mounted on the lens mount 2a, whereby the electrical connection between the lens device 1 and the camera device 2 is established. Establish a connection. With this electrical connection, the iris circuit 2f can perform operation control on the iris adjustment unit 1a.
  • the connector 2 c is configured to have a plurality of connection terminals in accordance with, for example, the standard of EIAJ (Electronic Industries Association of Japan). Yes.
  • the connector 2c has four pin-like connection terminals (hereinafter also simply referred to as “connection pins”) 11 to 14 as a plurality of connection terminals.
  • connection pins include a first connection pin (hereinafter also referred to as “first pin”) 11, a second connection pin (hereinafter also referred to as “second pin”) 12, and a third.
  • Connection pins hereinafter also referred to as “third pins” 13 and fourth connection pins (hereinafter also referred to as “fourth pins”) 14, which are arranged in a predetermined order.
  • the connector 2c having such a configuration is mainly adapted to a video iris lens or a DC iris lens.
  • the connector 2c is not limited to the configuration shown in FIG. That is, if the connector 2c has the first pin 11 to the fourth pin 14 arranged in a predetermined order, the connector 2c is added to the first pin 11 to the fourth pin 14 as shown in FIG. Thus, a groove 15 or the like for preventing erroneous insertion may be formed.
  • the connector 2c having such a configuration is mainly adapted to a P iris lens.
  • the connector 2c has the first pin 11 to the fourth pin 14 arranged in a predetermined order, the connector 2c can be added to the first pin 11 to the fourth pin 14 as shown in FIG. Further, it may be configured to have a fifth connection pin (hereinafter also referred to as “fifth pin”) 16.
  • the connector 2c having such a configuration is mainly compatible with an i-CS lens.
  • the connector 2c having each configuration shown in FIGS. 2A to 2C has a connection terminal corresponding to each of the first pin 11 to the fourth pin 14 in any configuration.
  • a connector plug or connector socket having the same shape can be fitted.
  • the lens discriminating unit 2d constitutes a part of the central control unit 2e, and discriminates the type of the lens device 1 electrically connected to the connector 2c. Specifically, the lens determination unit 2d determines whether the lens device 1 electrically connected to the connector 2c is a video iris lens, a DC iris lens, a P iris lens, or an i-CS lens. It has become.
  • the lens discrimination unit 2d is configured by an electric circuit that realizes the functions described below. That is, the lens determination unit 2d can supply power (for example, voltage application of 5V) to one of the first pin 11 to the fourth pin 14, specifically, the first pin 11 in the connector 2c. In addition, another one of the first pin 11 to the fourth pin 14, specifically, the third pin 13 can be grounded to the ground (GND). Furthermore, the lens determination unit 2d is configured for each of the other connection pins of the connector 2c when the power is supplied to the first pin 11, specifically, the second pin 12 and the fourth pin 14. It is configured to detect whether the status is a high state (for example, a voltage value state equal to or higher than a predetermined threshold) or a low state (for example, a voltage value state lower than the predetermined threshold value).
  • a high state for example, a voltage value state equal to or higher than a predetermined threshold
  • a low state for example, a voltage value state lower than the predetermined threshold value
  • the lens device 1 that is electrically connected to the connector 2c has a lens device 1 that is a video iris lens, a DC iris lens, a P iris lens, or an i-CS.
  • the configuration of the electric circuit differs depending on whether the lens is used. Therefore, the statuses of the second pin 12 and the fourth pin 14 when the lens determination unit 2 d supplies power to the first pin 11 are unique for each type of lens device 1. Using this, the lens determination unit 2d determines the type of the lens device 1 that is electrically connected to the connector 2c.
  • the lens discriminating unit 2d is based on a preset discrimination table (see FIG. 3E), and the second pin 12 and the fourth pin 14 when the first pin 11 is supplied with power. If the status detection results are all in the low state (hereinafter also simply referred to as “L”), it is determined that the type of the lens device 1 connected to the connector 2c is a video iris lens (FIG. 3). (See (a) and (e)). In addition, the lens determination unit 2d determines that the status detection result of the second pin 12 is in a high state (hereinafter, simply “H”) for the second pin 12 and the fourth pin 14 when power is supplied to the first pin 11.
  • H high state
  • the lens determination unit 2d has a status detection result of the second pin 12 of L for the second pin 12 and the fourth pin 14 when power is supplied to the first pin 11, and the fourth pin 14 If the status detection result is H, it is determined that the type of the lens device 1 connected to the connector 2c is a P-iris lens (see FIGS. 3C and 3E). Further, the lens determination unit 2d is connected to the connector 2c if the status detection results of the second pin 12 and the fourth pin 14 when the power is supplied to the first pin 11 are both H. It is determined that the type of the lens device 1 is an i-CS lens (see FIGS. 3D and 3E).
  • the lens determination unit 2d determines the type of the lens device 1 connected to the connector 2c.
  • a processing procedure when the lens determination unit 2d in the camera device 2 determines the type of the lens device 1 will be specifically described.
  • the iris circuit 2f in the camera device 2 is configured to be selectively compatible with each of a video iris lens, a DC iris lens, a P iris lens, and an i-CS lens.
  • the lens device 1 is mounted on the lens mount 1a of the camera device 2, and the lens device 1 and the camera device 2 are electrically connected via the connector 2c (step 101, Hereinafter, the step is abbreviated as “S”.)
  • the lens discriminating unit 2d of the camera device 2 is connected to the lens device 1 side through the connector 2c. Power is supplied to the first pin 11 and the third pin 13 of the connector 2c is grounded to GND (S103).
  • the lens determination unit 2d reads the status on the lens device 1 side through the connector 2c (S104). Specifically, the lens determination unit 2d reads and detects the statuses of the second pin 12 and the fourth pin 14 when power is supplied to the first pin 11 of the connector 2c, and each status is H. Whether it is L or L is detected (S105).
  • the lens determination unit 2d indicates that the type of the lens device 1 connected to the connector 2c is a video iris lens. Determine. Then, the lens determination unit 2d notifies the determination result to the switching circuit 2g. In response to this, the switching circuit 2g switches the iris circuit 2f so that the function when the iris circuit 2f performs aperture control on the lens apparatus 1 is a function as a video iris circuit (S106). Thereby, the iris circuit 2 f can perform aperture control on the lens device 1 by a video iris control method suitable for the type of the lens device 1.
  • the lens determination unit 2d determines the type of the lens device 1 connected to the connector 2c. Is a DC iris lens. Then, the lens determination unit 2d notifies the determination result to the switching circuit 2g. In response to this, the switching circuit 2g switches the iris circuit 2f so that the function when the iris circuit 2f performs aperture control on the lens device 1 is a function as a DC iris circuit (S107). Thereby, the iris circuit 2 f can perform aperture control on the lens device 1 by a DC iris control method suitable for the type of the lens device 1.
  • the lens determination unit 2d determines the type of the lens device 1 connected to the connector 2c. Is a P-iris lens. Then, the lens determination unit 2d notifies the determination result to the switching circuit 2g. In response to this, the switching circuit 2g switches the iris circuit 2f so that the function when the iris circuit 2f performs aperture control on the lens device 1 is the function as the P iris circuit (S108). Thereby, the iris circuit 2 f can perform aperture control on the lens device 1 by the P iris control method suitable for the type of the lens device 1.
  • the lens determination unit 2d determines that the type of the lens device 1 connected to the connector 2c is an i-CS lens. Determine. Then, the lens determination unit 2d notifies the determination result to the switching circuit 2g. In response to this, the switching circuit 2g switches the iris circuit 2f so that the function when the iris circuit 2f performs aperture control on the lens device 1 is the function of the i-CS lens circuit (S109). . As a result, the iris circuit 2 f can perform aperture control on the lens device 1 by an i-CS control method suitable for the type of the lens device 1.
  • a plurality of types of aperture control methods that can be handled by the iris circuit 2f are prepared in advance, and the iris circuit 2f controls the aperture based on the determination result of the lens type in the lens determination unit 2d.
  • the function for performing the above is automatically switched to a function suitable for the type of the lens device 1.
  • the camera device 2 can operate the lens device 1 correctly without the user of the camera system being aware of the type of the lens device 1.
  • the camera device 2 ends the above-described series of lens type determination processing by the lens determination unit 2d (S110).
  • the imaging device 2b in the camera device 2 performs imaging of an optical image obtained through the lens device 1 while performing aperture control according to a method suitable for the type of the lens device 1. become.
  • a modification of the processing procedure when the lens determination unit 2d determines the type of the lens device 1 will be described.
  • the iris circuit 2f in the camera device 2 is configured to correspond to any one of a video iris lens, a DC iris lens, a P iris lens, or an i-CS lens will be described as an example.
  • the lens determination unit 2d obtains the status detection results for the second pin 12 and the fourth pin 14 when power is supplied to the first pin 11 of the connector 2c. Up to this point, processing is performed in the same manner as in the above-described processing procedure (see S101 to S105 in FIG. 4). However, in the case of such a configuration, unlike the above-described processing procedure, it is possible to perform function switching such that the iris circuit 2f functions as a video iris circuit, a DC iris circuit, a P iris circuit, or an i-CS lens circuit. Can not. Therefore, in the case of such a configuration, the lens determination unit 2d performs the following processing operation.
  • the lens determining unit 2d determines the type of the lens device 1 based on the status detection results for the second pin 12 and the fourth pin 14, the determined lens type is an aperture control method by the iris circuit 2f of the camera device 2. It is determined whether or not it matches the above. This determination may be made based on information related to the aperture control method held on the camera device 2 side, for example.
  • the lens discrimination section 2d ends the lens type discrimination process.
  • the lens determining unit 2d determines whether the lens type matches the iris control method of the iris circuit 2f, the type of the mounted lens apparatus 1 is not compatible with the iris circuit 2f, so the lens determining unit 2d
  • the determination result is output to a monitor (not shown) of the camera device 2 or an external device (not shown) connected to the camera device 2 to notify the user of the camera system to that effect.
  • the central control unit 2d in the camera device 2 does not permit the iris circuit 2f to control the operation of the iris adjustment unit 1a.
  • the user recognizes that even if the type of the mounted lens device 1 does not correspond on the camera device 2 side. For example, if the user is prompted to replace the lens device 1 with a different type, or if the iris circuit 2f is compatible with manual switching of the iris control method, the user can manually switch the switch. And so on. Furthermore, if the central control unit 2e does not permit the operation control by the iris circuit 2f, even if the type of the mounted lens device 1 is not compatible with the camera device 2, the heat generation or the device destruction Etc. can be avoided in advance.
  • connection terminals (specifically, the second pin 12 and the fourth pin 14 are used regardless of which type of connector plug or connector socket is fitted to the connector 2c). Since the lens type is discriminated based on the status detection result for), the connector 2c itself does not necessarily have to be provided with the groove 15 for preventing erroneous insertion, and can be shared by each lens type. . That is, according to the present embodiment, it is possible to realize cost reduction by sharing the connector for each lens type.
  • the lens type of the mounted lens device 1 can be determined. Therefore, on the camera device 2 side, for example, if a plurality of types of control methods for the automatic aperture function that can be handled are prepared in advance, the automatic aperture function for the mounted lens device 1 is determined based on the determination result of the lens type. It is possible to automatically switch the control method to a method suitable for the lens type of the lens device 1. In this case, the camera device 2 can correctly operate the lens device without the user being aware of the lens type of the lens device 1.
  • the camera device 2 side for example, by outputting a determination result of the lens type to the user, it is notified whether the lens type of the mounted lens device 1 is compatible, Depending on the notification result, it is possible to prompt the user to manually switch the control method of the automatic iris function for the lens device 1.
  • the camera device 2 by determining the lens type of the mounted lens device 1, the camera device 2 can operate the lens device 1 correctly. There is no possibility that the aperture function does not operate correctly, and no heat generation or device destruction is caused.
  • the camera device 2 is a CCTV camera
  • the present invention is not limited to this, and may be another camera device such as an IP camera or an FA camera.
  • the present invention can be applied in exactly the same manner.
  • the lens mount 2a is not limited to the CS mount described as an example in the present embodiment, and may be a lens mount of another type such as a C mount.
  • the type of the lens device 1 is mainly one of four types of a video iris lens, a DC iris lens, a P iris lens, and an i-CS lens, and the second pin 12 and the fourth pin
  • the present invention is not limited to this. That is, according to the present invention, even when there are four or more lens types, each type can be accurately and easily determined based on the status detection results for a plurality of connection terminals. Is feasible. Note that the status of each of the plurality of connection terminals is not particularly limited as long as it is unique to each preset type.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Structure And Mechanism Of Cameras (AREA)

Abstract

La présente invention permet de distinguer facilement et avec précision des types de lentilles. L'invention concerne un dispositif d'appareil photographique comprenant : une monture de lentille sur laquelle est installé un dispositif de lentille qui a une fonction de diaphragme automatique ; un connecteur qui comporte une pluralité de bornes de connexion qui sont électriquement connectées au dispositif de lentille qui est installé sur la monture de lentille ; et une partie de distinction de lentille qui, sur la base de résultats de détection d'état pour les autres bornes de connexion après la mise sous tension de l'une de la pluralité des bornes de connexion, distingue le type de dispositif de lentille qui est connecté au connecteur.
PCT/JP2017/013563 2017-03-31 2017-03-31 Dispositif d'appareil photographique et dispositif de lentille WO2018179319A1 (fr)

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PCT/JP2017/013563 WO2018179319A1 (fr) 2017-03-31 2017-03-31 Dispositif d'appareil photographique et dispositif de lentille
TW107105311A TW201901277A (zh) 2017-03-31 2018-02-13 相機裝置及鏡頭裝置

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PCT/JP2017/013563 WO2018179319A1 (fr) 2017-03-31 2017-03-31 Dispositif d'appareil photographique et dispositif de lentille

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200326500A1 (en) * 2017-12-26 2020-10-15 Zhejiang Dahua Technology Co., Ltd. Methods and systems for identifying camera lens
US11243456B2 (en) * 2018-08-30 2022-02-08 Canon Kabushiki Kaisha Mount device including a plurality of terminals including a terminal used for supplying of electric power, accessory detachably attached to the mount device, control method for the mount device, and non-transitory computer-readable storage medium storing program for performing the control method

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Publication number Priority date Publication date Assignee Title
JP2000137276A (ja) * 1998-10-30 2000-05-16 Mitsubishi Electric Corp ビデオカメラ装置
JP2001320617A (ja) * 2000-05-08 2001-11-16 Watec Co Ltd ビデオカメラにおけるビデオカメラと自動絞りレンズとの交換接続装置およびその検出回路
JP2005099530A (ja) * 2003-09-25 2005-04-14 Fujitsu General Ltd レンズ種別切換回路
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US11632491B2 (en) * 2017-12-26 2023-04-18 Zhejiang Dahua Technology Co., Ltd. Methods and systems for identifying camera lens
US12028598B2 (en) 2017-12-26 2024-07-02 Zhejiang Dahua Technology Co., Ltd. Methods and systems for identifying camera lens
US11243456B2 (en) * 2018-08-30 2022-02-08 Canon Kabushiki Kaisha Mount device including a plurality of terminals including a terminal used for supplying of electric power, accessory detachably attached to the mount device, control method for the mount device, and non-transitory computer-readable storage medium storing program for performing the control method

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