System capable of changing aperture value of diaphragm within lens apparatus on both lens side and camera side, pickup apparatus, lens apparatus, control method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorYusuke Tamura
Life of this patent
Estimating the term…
Abstract
The system has a camera and a lens unit, and in a first mode, a diaphragm of the lens unit is controlled such that an effective aperture value is a first aperture value set according to a user operation and in the camera, a photometric value is calculated from a frame image during a Live View operation in a state where an amount of light received is adjusted by the diaphragm.
Claims16
A system comprising a lens apparatus and a pickup apparatus that are capable of communicating with each other,
- wherein the lens apparatus comprises a diaphragm that adjusts an amount of light during shooting with the pickup apparatus, and the pickup apparatus comprises a sensor,
- the lens apparatus further comprising:
- a setting member that sets a first aperture value according to a user operation;
- at least one processor;
- and
- a memory coupled to the at least one processor, the memory having instructions that, when executed by the at least one processor, perform the operations as:
- an aperture control unit that controls the diaphragm such that in a first mode, an effective aperture value is the first aperture value,
- the pickup apparatus further comprising:
- at least one processor;
- and
- a memory coupled to the at least one processor, the memory having instructions that, when executed by the at least one processor, perform the operations as:
- an image obtaining unit that obtains a frame image by taking an image of a subject with the sensor during a Live View operation in a state where the amount of light received is adjusted by the diaphragm;
- a photometric value calculation unit that calculates a photometric value from the frame image;
- an aperture value calculation unit that calculates an aperture value according to the photometric value;
- a determination unit that determines whether a control subject is the lens apparatus or the pickup apparatus according to a shooting mode during the Live View operation;
- a transition unit that, in a case where the determined diaphragm control subject is the pickup apparatus, determines an aperture value calculated by the aperture value calculation unit as a second aperture value, and transitions the lens apparatus to a second mode;
- and
- a forced control unit that, in a case where the transition unit transitions the lens apparatus to the second mode, forcibly controls the aperture control unit such that the effective aperture value is not the first aperture value but the determined second aperture value.
A pickup apparatus that connects to a lens apparatus such that they are able to communicate with each other, wherein the pickup apparatus comprises a sensor, and the lens apparatus comprises a diaphragm that adjusts an amount of light during shooting with the pickup apparatus, and in a first mode, controls the diaphragm such that an effective aperture value of the diaphragm is a first aperture value that is set according to a user operation,
- the pickup apparatus comprising:
- at least one processor;
- and
- a memory coupled to the at least one processor, the memory having instructions that, when executed by the at least one processor, perform the operations as:
- an image obtaining unit that obtains a frame image by taking an image of a subject with the sensor during a Live View operation in a state where the amount of light received is adjusted by the diaphragm;
- a photometric value calculation unit that calculates a photometric value from the frame image;
- an aperture value calculation unit that calculates an aperture value according to the photometric value;
- a determination unit that determines whether an control subject is the lens apparatus or the pickup apparatus according to a shooting mode during the Live View operation;
- a transition unit that, when the determined control subject is the pickup apparatus, determines an aperture value calculated by the aperture value calculation unit as a second aperture value, and transitions the lens apparatus to a second mode;
- and
- a forced control unit that, when the transition unit transitions the lens apparatus to the second mode, forcibly controls the lens apparatus such that the effective aperture value is not the first aperture value but the determined second aperture value.
A method for a system comprising a lens apparatus and a pickup apparatus that are capable of communicating with each other, wherein the lens apparatus comprises a diaphragm that adjusts an amount of light during shooting with the pickup apparatus, and the pickup apparatus comprises a sensor, the method comprising:
- setting, in the lens apparatus, a first aperture value according to a user operation;
- and
- controlling, in the lens apparatus, the diaphragm such that in a first mode, an effective aperture value is the first aperture value,
- obtaining, in the pickup apparatus, a frame image by taking an image of a subject with the sensor during a Live View operation in a state where the amount of light received is adjusted by the diaphragm;
- calculating, in the pickup apparatus, a photometric value from the frame image;
- calculating, in the pickup apparatus, an aperture value according to the photometric value;
- determining, in the pickup apparatus, whether a control subject is the lens apparatus or the pickup apparatus according to a shooting mode during the Live View operation;
- determining, in the pickup apparatus, in a case where the determined control subject is the pickup apparatus, the aperture value calculated in the calculating as a second aperture value, and transitioning the lens apparatus to a second mode;
- and
- forcibly controlling, in the pickup apparatus, in a case where the lens apparatus is transitioned to the second mode, such that the effective aperture value is not the first aperture value but the determined second aperture value.
A method for a pickup apparatus connected to a lens apparatus such that they are able to communicate with each other, wherein the pickup apparatus comprises a sensor, and the lens apparatus comprises a diaphragm that adjusts the amount of light during shooting with the pickup apparatus, and in a first mode, controls the diaphragm such that an effective aperture value is a first aperture value that is set according to a user operation, the method comprising:
- obtaining a frame image by taking an image of a subject with the sensor during a Live View operation in a state where an amount of light received is adjusted by the diaphragm;
- calculating a photometric value from the frame image;
- calculating an aperture value according to the photometric value;
- determining whether a control subject is the lens apparatus or the pickup apparatus according to a shooting mode during the Live View operation;
- determining, in a case where the determined control subject is the pickup apparatus, the aperture value calculated in the calculating as a second aperture value, and transitioning the lens apparatus to a second mode;
- and
- forcibly controlling, in a case where the lens apparatus is transitioned to the second mode, the lens apparatus such that the effective aperture value is not the first aperture value but the determined second aperture value.
A non-transitory computer-readable storage medium storing a program that causes a computer to execute a method for a system comprising a lens apparatus and a pickup apparatus that are capable of communicating with each other, wherein the lens apparatus comprises a diaphragm that adjusts an amount of light during shooting with the pickup apparatus, and the pickup apparatus comprises a sensor,
- wherein the method comprises:
- setting, in the lens apparatus, a first aperture value according to a user operation;
- and
- controlling, in the lens apparatus, the diaphragm such that in a first mode, an effective aperture value is the first aperture value,
- obtaining, in the pickup apparatus, a frame image by taking an image of a subject with the sensor during a Live View operation in a state where the amount of light received is adjusted by the diaphragm;
- calculating, in the pickup apparatus, a photometric value from the frame image;
- calculating, in the pickup apparatus, an aperture value according to the photometric value;
- determining, in the pickup apparatus, whether a control subject is the lens apparatus or the pickup apparatus according to a shooting mode during the Live View operation;
- determining, in the pickup apparatus, in a case where the determined control subject is the pickup apparatus, the aperture value calculated in the calculating as a second aperture value, and transitioning the lens apparatus to a second mode;
- and
- forcibly controlling, in the pickup apparatus, in a case where the lens apparatus is transitioned to the second mode, such that the effective aperture value is not the first aperture value but the determined second aperture value.
A non-transitory computer-readable storage medium storing a program that causes a computer to execute a method for a pickup apparatus connected to a lens apparatus such that they are able to communicate with each other, wherein the pickup apparatus comprises a sensor, and the lens apparatus comprises a diaphragm that adjusts an amount of light during shooting with the pickup apparatus, and in a first mode, controls the diaphragm such that an effective aperture value of the diaphragm is a first aperture value that is set according to a user operation, and
- wherein the method comprises:
- obtaining a frame image by taking an image of a subject with the sensor during a Live View operation in a state where the amount of light received is adjusted by the diaphragm;
- calculating a photometric value from the frame image;
- calculating an aperture value according to the photometric value;
- determining whether a control subject is the lens apparatus or the pickup apparatus according to a shooting mode during the Live View operation;
- determining, when the determined control subject is the pickup apparatus, the aperture value calculated in the calculating as a second aperture value, and transitioning the lens apparatus to a second mode;
- and
- forcibly controlling, when the lens apparatus is transitioned to the second mode, the lens apparatus such that the effective aperture value is not the first aperture value but the determined second aperture value.
Dependencies are inferred from the claim text.