Interchangeable lens, camera body, and camera system
AssigneePanasonic Corporation
InventorsHaruo Isaka, Mitsuyoshi Okamoto, Kenji Kawazoe, Naotake Kitahira, Koji Shibuno
Life of this patent
Estimating the term…
Abstract
An interchangeable lens includes a focus lens for changing a focus state of an object image, a driving unit for driving the focus lens, a lens controller for controlling the driving unit so as to move the focus lens forward and backward along the optical axis at a predetermined drive frequency, and a storage unit for storing therein drive frequency information representing a drive frequency at which the driving unit can control. A camera body obtains the drive frequency information from the interchangeable lens and performs control while referring to the drive frequency information.
Claims10
An interchangeable lens mountable to a camera body, comprising:
- a focus lens configured to change a focus state of a subject image;
- a driving unit configured to drive the focus lens along an optical axis;
- a lens controller configured to control the driving unit to move the focus lens forward and backward at a predetermined drive frequency along the optical axis;
- a storage unit configured to store drive frequency information indicating a drive frequency at which the driving unit can drive the focus lens;
- and
- a sending unit configured to send the drive frequency information to the camera body.
A camera body to which an interchangeable lens is mountable, the interchangeable lens including a focus lens and storing drive frequency information indicative of a drive frequency for driving the focus lens to move forward and backward along an optical axis, the camera body comprising:
- an imaging unit configured to capture a subject image at a predetermined imaging frequency;
- a receiving unit configured to receive an instruction as to the predetermined imaging frequency;
- an obtaining unit configured to obtain the drive frequency information from the interchangeable lens;
- and
- a body controller configured to refer to the drive frequency information obtained by the obtaining unit, determine whether the focus lens can be driven at a drive frequency corresponding to the predetermined imaging frequency indicated by the instruction received by the receiving unit, and control an operation of the camera body in accordance with a result of the determination.
A camera system comprising an interchangeable lens and a camera body,
- the interchangeable lens comprising:
- a focus lens configured to change a focus state of a subject image;
- a driving unit configured to drive the focus lens along an optical axis;
- a lens controller configured to control the driving unit to move the focus lens forward and backward at a predetermined drive frequency along the optical axis;
- and
- a storage unit configured to store drive frequency information on a drive frequency at which the driving unit can drive the focus lens;
- and
- a sending unit configured to send the drive frequency information to the camera body,
- the camera body comprising:
- an imaging unit configured to capture a subject image at a predetermined imaging frequency;
- a receiving unit configured to receive an instruction related to the predetermined imaging frequency;
- a body controller configured to control the camera body,
- wherein
- the body controller requests the drive frequency information from the lens controller,
- the lens controller sends the drive frequency information to the body controller through the sending unit in response to the request from the body controller, and
- the body controller controls an operation of the camera body by referring to the received drive frequency information.
Dependencies are inferred from the claim text.