Lens apparatus and calculation method
AssigneeCanon Kabushiki Kaisha
InventorsYu Inagaki, Nobutaka Mizuno
Life of this patent
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Abstract
A lens apparatus includes an imaging optical system, a storage unit configured to store aperture information about the imaging optical system, and a transmission unit configured to transmit the aperture information to an imaging apparatus, wherein the aperture information is determined based on a shape parameter representing a shape of an aperture which defines an outer edge of a light flux passing through the imaging optical system.
Claims8
A lens apparatus comprising:
- an imaging optical system;
- a storage unit configured to store aperture information about the imaging optical system;
- and
- a transmission unit configured to transmit the aperture information to an imaging apparatus,
- wherein the aperture information is determined based on a shape parameter representing a shape of an aperture which defines an outer edge of a light flux passing through the imaging optical system.
A lens apparatus comprising:
- an imaging optical system;
- an optical unit configured to be detachably mounted between the imaging optical system and an imaging apparatus;
- a storage unit configured to store first aperture information about the imaging optical system and second aperture information about the imaging optical system with the optical unit mounted thereon;
- and
- a transmission unit configured to transmit at least one of the first aperture information and the second aperture information to the imaging apparatus,
- wherein the transmission unit transmits at least one of the first aperture information and the second aperture information according to a state of mounting of the optical unit.
A lens apparatus comprising:
- an imaging optical system;
- an optical unit configured to be detachably mounted between the imaging optical system and an imaging apparatus;
- a storage unit configured to store first aperture information about the imaging optical system;
- a calculation unit configured to calculate second aperture information about the imaging optical system with the optical unit mounted thereon;
- and
- a transmission unit configured to transmit at least one of the first aperture information and the second aperture information to the imaging apparatus,
- wherein, according to a state of mounting of the optical unit, the calculation unit calculates the second aperture information from the first aperture information and optical information about the optical unit, and the transmission unit transmits at least one of the first aperture information and the second aperture information.
A calculation method for calculating aperture information about an imaging optical system, the calculation method comprising:
- acquiring a shape parameter about the imaging optical;
- and
- calculating the aperture information based on the shape parameter representing a shape of an aperture which defines an outer edge of a light flux passing through the imaging optical system.
Dependencies are inferred from the claim text.