US-12621563-B2 - Lens apparatus, detachable attached to an image pickup apparatus, having a controller for performing communication with the image pickup apparatus with respect to driving an optical

US12621563B2US 12621563 B2US12621563 B2US 12621563B2US-12621563-B2

Abstract

A lens apparatus detachably attached to an image pickup apparatus body includes a controller configured to perform communication with the image pickup apparatus body with respect to driving of an optical member, wherein the controller is configured to transmit, based on first information for identifying the image pickup apparatus body transmitted from the image pickup apparatus body, second information for identifying the lens apparatus to the image pickup apparatus body, and transmit, based on third information for identifying the image pickup apparatus body transmitted from the image pickup apparatus body after transmission of the second information, fourth information for identifying the lens apparatus to the image pickup apparatus body.

Inventors

Yumiko Yoshida

Assignees

CANON KABUSHIKI KAISHA

Dates

Publication Date: 20260505
Application Date: 20220701
Priority Date: 20210707

Claims (18)

1 . A lens apparatus detachably attached to an image pickup apparatus, the lens apparatus comprising: an optical member; and a controller configured to perform communication with the image pickup apparatus with respect to driving of the optical member, wherein the controller is configured to receive first information for identifying the image pickup apparatus transmitted from the image pickup apparatus, and transmit second information for identifying the lens apparatus to the image pickup apparatus; and wherein the controller is configured to receive a change confirmation information transmitted from the image pickup apparatus according to reception of the second information by the image pickup apparatus, wherein the controller is configured to transmit lens apparatus change information to the image pickup apparatus in response to receiving the change confirmation information, in order to request the image pickup apparatus to transmit third information for identifying the image pickup apparatus based on the first information, wherein the controller is configured to, in response to the third information transmitted from the image pickup apparatus, transmit fourth information for identifying the lens apparatus to the image pickup apparatus, wherein the second information is information that indicates whether the lens apparatus supports a first function or not, wherein the fourth information is information that indicates that the lens apparatus supports the first function, wherein the second information and the fourth information are sent from the same lens apparatus, and wherein the first function is a function related to focusing of the optical member.
2 . The lens apparatus according to claim 1 , wherein the controller is configured to receive the third information and transmit fourth information that is the second information at least a part of which is changed to the image pickup apparatus.
3 . The lens apparatus according to claim 2 , wherein the controller is configured to exclusively control a plurality of drive units respectively configured to drive a plurality of optical members based on the fourth information.
4 . The lens apparatus according to claim 2 , wherein the fourth information includes information about whether the controller is capable of limiting a driving speed of the optical member.
5 . The lens apparatus according to claim 1 , wherein the first function is a function regarding driving of the optical member by the image pickup apparatus.
6 . The lens apparatus according to claim 5 , wherein each of the second information and the fourth information includes information about limitation on the driving of the optical member.
7 . The lens apparatus according to claim 1 , wherein the controller functions as a drive unit configured to drive the optical member based on the third information to perform limitation on the driving of the optical member.
8 . The lens apparatus according to claim 1 , further comprising: a movable optical member configured to reduce an image blur, wherein the controller further functions as a limiting mechanism configured to perform limitation on the driving of the optical member, and wherein the controller is configured to control, based on the third information, the limitation on the driving of the optical member with the limiting mechanism.
9 . The lens apparatus according to claim 1 , wherein the optical member includes at least one of a lens unit movable for zooming, a lens unit movable for focusing, a lens unit movable for reducing an image blur, or an aperture stop.
10 . The lens apparatus according to claim 1 , further comprising: wherein the lens apparatus is detachably attached between an interchangeable lens apparatus detachably attached to the image pickup apparatus and the image pickup apparatus, and wherein the controller is configured to perform communication with the interchangeable lens apparatus and the image pickup apparatus with respect to the driving of the optical member.
11 . The lens apparatus according to claim 10 , further comprising an optical member disposed on an optical path between the interchangeable lens apparatus and the image pickup apparatus.
12 . A pickup system comprising: the lens apparatus according to claim 1 ; and an image pickup apparatus, wherein the image pickup apparatus includes an image pickup element configured to pick up an image formed via the lens apparatus.
13 . The lens apparatus according to claim 1 , wherein in a case where a command included in the first information satisfies a condition, transmission of the third information is requested, and wherein in a case where the command included in the first information does not satisfy the condition, transmission of the third information is not requested.
14 . The lens apparatus according to claim 1 , wherein the first information and the third information are information including a same content.
15 . An image pickup apparatus to which a lens apparatus is detachably attached, the image pickup apparatus comprising: a controller configured to perform communication with the lens apparatus with respect to driving of an optical member; and to pick up an image formed via the lens apparatus, wherein the controller is configured to transmit first information for identifying the image pickup apparatus to the lens apparatus and receive second information for identifying the lens apparatus from the lens apparatus, and wherein the controller is configured to transmit a change confirmation information to the lens apparatus in response to receiving the second information from the lens apparatus, wherein the controller is configured to transmit third information for identifying the image pickup apparatus to the lens apparatus in response to receiving lens apparatus change information from the lens apparatus, wherein the controller is configured to receive fourth information for identifying the lens apparatus, wherein the second information is information that indicates whether the lens apparatus supports a first function or not, wherein the fourth information is information that indicates that the lens apparatus supports the first function, wherein the second information and the fourth information are sent from the same lens apparatus, and wherein the first function is a function related to focusing of the optical member.
16 . A pickup system comprising: the image pickup apparatus according to claim 15 ; and a lens apparatus detachably attached to the image pickup apparatus.
17 . A non-transitory storage medium storing a program for causing a computer to execute a method of communication with an image pickup apparatus, the method being performed by a lens apparatus detachably attached to the image pickup apparatus with respect to driving of an optical member, the method comprising: receiving first information for identifying the image pickup apparatus transmitted from the image pickup apparatus, and transmitting second information for identifying the lens apparatus to the image pickup apparatus, and receiving a change confirmation information transmitted from the image pickup apparatus according to reception of the second information by the image pickup apparatus, transmitting lens apparatus change information to the image pickup apparatus in response to receiving the change confirmation information, in order to request the image pickup apparatus to transmit third information for identifying the image pickup apparatus; transmitting fourth information, in response to the third information transmitted from the image pickup apparatus, for identifying the lens apparatus to the image pickup apparatus, wherein the second information is information that indicates whether the lens apparatus supports a first function or not, wherein the fourth information is information that indicates that the lens apparatus supports the first function, wherein the second information and the fourth information are sent from the same lens apparatus, and wherein the first function is a function related to focusing of the optical member.
18 . A non-transitory storage medium storing a program for causing a computer to execute a method of communication with a lens apparatus, the method being performed by an image pickup apparatus to which the lens apparatus is detachably attached with respect to driving of an optical member, the method comprising: transmitting first information for identifying the image pickup apparatus to the lens apparatus, and receiving second information for identifying the lens apparatus from the lens apparatus, transmitting a change confirmation information to the lens apparatus in response to receiving the second information from the lens apparatus, transmitting third information for identifying the image pickup apparatus to the lens apparatus in response to receiving lens apparatus change information from the lens apparatus; receiving fourth information for identifying the lens apparatus, wherein the second information is information that indicates whether the lens apparatus supports a first function or not, wherein the fourth information is information that indicates that the lens apparatus supports the first function, wherein the second information and the fourth information are sent from the same lens apparatus, and wherein the first function is a function related to focusing of the optical member.

Description

BACKGROUND Field The aspect of the embodiments relates to a lens apparatus, an image pickup apparatus, an image pickup apparatus body, and a storage medium. Description of the Related Art A conventional imaging apparatus (also referred to as an image pickup apparatus) is known to include an imaging apparatus body (also referred to as an image pickup apparatus body or a camera body) and an interchangeable lens apparatus. In the imaging apparatus, information in the interchangeable lens apparatus is transmitted to the imaging apparatus body, and, based on the information, the imaging apparatus body transmits commands for driving optical members in the interchangeable lens apparatus to the interchangeable lens apparatus. When a new function is appended to the imaging apparatus, in one embodiment, the new function is implemented in a case where both of the imaging apparatus body and the interchangeable lens apparatus support the new function and at the same time the imaging apparatus has compatibility with the conventional apparatus that does not support the new function. Japanese Patent Application Laid-Open No. 2009-53523 discusses an imaging apparatus that has a newly appended function while maintaining compatibility with a conventional apparatus. To maintain compatibility with the conventional apparatus, communication between the imaging apparatus body and the interchangeable lens apparatus that both support the new function can be firstly implemented by transmission and reception of information in accordance with the conventional rules that do not define the new function. Thus, because the interchangeable lens apparatus cannot identify the imaging apparatus body through the transmission and reception of the information, the new function thus cannot be implemented. SUMMARY A lens apparatus detachably attached to an image pickup apparatus body includes an optical member, and a controller configured to perform communication with the image pickup apparatus body with respect to driving of the optical member, wherein the controller is configured to transmit, based on first information for identifying the image pickup apparatus body transmitted from the image pickup apparatus body, second information for identifying the lens apparatus to the image pickup apparatus body, and transmit, based on third information for identifying the image pickup apparatus body transmitted from the image pickup apparatus body after transmission of the second information, fourth information for identifying the lens apparatus to the image pickup apparatus body. Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an example of a configuration of an imaging apparatus according to a first exemplary embodiment. FIG. 2 illustrates examples of respective configurations of a control unit in a lens apparatus and a control unit in an imaging apparatus body according to the first exemplary embodiment. FIG. 3 illustrates an example of clock synchronization communication according to the first exemplary embodiment. FIGS. 4A, 4B, and 4C illustrate examples of information to be transmitted in initial communication according to the first exemplary embodiment. FIG. 5 is a flowchart illustrating an example of processing of the initial communication according to the first exemplary embodiment. FIG. 6 is a flowchart illustrating an example of processing of drive mode selection according to the first exemplary embodiment. FIG. 7 is a flowchart illustrating an example of zoom driving processing in a power saving mode according to the first exemplary embodiment. FIG. 8 is a flowchart illustrating an example of focus driving processing in the power saving mode according to the first exemplary embodiment. FIGS. 9A and 9B illustrate examples of driving of optical members for each type of the imaging apparatus body according to the first exemplary embodiment. FIGS. 10A and 10B illustrate examples of state transitions of an image stabilizing lens and a lock mechanism according to the first exemplary embodiment. FIG. 11 illustrates examples of respective configurations of a control unit in a lens apparatus and a control unit in an imaging apparatus body according to a second exemplary embodiment. FIG. 12 is a flowchart illustrating an example of processing of power control according to the second exemplary embodiment. FIG. 13 illustrates an example of a configuration of an imaging apparatus according to a third exemplary embodiment. FIG. 14 illustrates examples of respective configurations of a control unit in a lens apparatus, a control unit in an adapter apparatus, and a control unit in an imaging apparatus body according to the third exemplary embodiment. FIGS. 15A, 15B, and 15C illustrate examples of information to be transmitted in initial communication according to the third exemplary embodiment. FI