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.
Claims8
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,
- wherein in a case where a lens apparatus attached to the image pickup apparatus includes the reflective optical system, the aperture information includes information on an outer diameter and an inner diameter of an exit pupil of the lens apparatus,
- wherein the receiver receives a flag indicating whether or not the lens apparatus attached to the image pickup apparatus includes the reflective optical system, and
- wherein the calculation unit makes a difference in calculation method of a conversion coefficient used to calculate the defocus amount, based on the flag.
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,
- wherein in a case where a lens apparatus attached to the image pickup apparatus includes the reflective optical system, the aperture information includes information on an outer diameter and an inner diameter of an exit pupil of the lens apparatus,
- wherein the receiver receives a flag indicating whether or not the lens apparatus attached to the image pickup apparatus includes the reflective optical system, and
- wherein the calculation unit makes a difference in calculation method of a shading correction value based on the flag.
Dependencies are inferred from the claim text.