Lens apparatus, image pickup apparatus, control method of lens apparatus, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorsHirotaro Kikuchi, Nobutaka Mizuno
Life of this patent
Estimating the term…
Abstract
A lens apparatus attachable to and detachable from a camera body includes a reflective optical system, a memory configured to store aperture information based on an optical condition of the lens apparatus, and a transmitter configured to transmit the aperture information acquired from the memory to the camera body.
Claims18
A lens apparatus attachable to and detachable from a camera body, the lens apparatus comprising:
- a reflective optical system;
- a memory configured to store aperture information based on an optical condition of the lens apparatus;
- and
- a transmitter configured to transmit the aperture information acquired from the memory to the camera body.
An image pickup apparatus attachable to and detachable from a lens apparatus that includes a reflective optical system, the image pickup apparatus comprising:
- an image sensor;
- a receiver configured to receive aperture information based on an optical condition of the lens apparatus from the lens apparatus;
- and
- a calculation unit configured to calculate a defocus amount based on the aperture information.
A control method of a lens apparatus that includes a reflective optical system and is attachable to and detachable from a camera body, the control method comprising the steps of:
- acquiring from a memory aperture information based on an optical condition of the lens apparatus;
- and
- transmitting the aperture information acquired from the memory to the camera body.
Dependencies are inferred from the claim text.