An accessory includes a plurality of communication contacts that includes a first contact, and a control unit that notifies an electronic apparatus of a communication request by changing a signal level of the first contact from a first signal level to a second signal level different from the first signal level, and transmits information indicating a communication factor in response to a reception of a request for the information indicating the communication factor in response to a notification of the communication request. In a case where the control unit notifies the electronic apparatus of the communication request via the first contact in response to a start of a power supply, the control unit performs predetermined communication without receiving the request for the information indicating the communication factor or transmitting the information indicating the communication factor.

A focus detection apparatus, comprising, focus detection pixels that receive a pair of light fluxes resulting from pupil division of light flux, a memory that stores correction values in accordance with width of the imaging light flux in the pupil-division direction relating to a two-image interval value, and a controller having a focus detection section, a light flux width calculation section, and a defocus amount calculation section, wherein the light flux width calculation section calculates the width of the imaging light flux in the pupil-division direction, and the defocus amount calculation section calculates defocus amount of the photographing optical system based on the two-image interval value, wherein the focus detection section detects a first two-image interval value and corrects the first two-image interval value based on the correction values and the width of the imaging light flux in the pupil-division direction to obtain a second two-image interval value.

An accessory includes a plurality of communication contacts that includes a first contact, and a control unit that notifies an electronic apparatus of a communication request by changing a signal level of the first contact from a first signal level to a second signal level different from the first signal level, and transmits information indicating a communication factor in response to a reception of a request for the information indicating the communication factor in response to a notification of the communication request. In a case where the control unit notifies the electronic apparatus of the communication request via the first contact in response to a start of a power supply, the control unit performs predetermined communication without receiving the request for the information indicating the communication factor or transmitting the information indicating the communication factor.

An accessory includes a plurality of communication contacts that includes a first contact, and a control unit that notifies an electronic apparatus of a communication request by changing a signal level of the first contact from a first signal level to a second signal level different from the first signal level, and transmits information indicating a communication factor in response to a reception of a request for the information indicating the communication factor in response to a notification of the communication request. In a case where the control unit notifies the electronic apparatus of the communication request via the first contact in response to a start of a power supply, the control unit performs predetermined communication without receiving the request for the information indicating the communication factor or transmitting the information indicating the communication factor.

An electronic apparatus which is capable of communicating with an external device mounted thereon, and the external device. An external engagement unit of the external device is capable of being mounted into an apparatus engagement unit of the electronic apparatus. A plurality of apparatus wireless communicators is located in the apparatus engagement unit so as to face respective ones of a plurality of external wireless communicators located in the external engagement unit mounted into the apparatus engagement unit. The plurality of apparatus wireless communicators is arranged in the apparatus engagement unit such that radiation characteristics of all of the plurality of apparatus wireless communicators are at least not parallel. The plurality of external wireless communicators is arranged in the external engagement unit such that radiation characteristics of all of the plurality of external wireless communicators are at least not parallel.

An electronic apparatus which is capable of communicating with an external device mounted thereon, and the external device. An external engagement unit of the external device is capable of being mounted into an apparatus engagement unit of the electronic apparatus. A plurality of apparatus wireless communicators is located in the apparatus engagement unit so as to face respective ones of a plurality of external wireless communicators located in the external engagement unit mounted into the apparatus engagement unit. The plurality of apparatus wireless communicators is arranged in the apparatus engagement unit such that radiation characteristics of all of the plurality of apparatus wireless communicators are at least not parallel. The plurality of external wireless communicators is arranged in the external engagement unit such that radiation characteristics of all of the plurality of external wireless communicators are at least not parallel.

Provided is a technique for facilitating management of an image sensor having a modular structure. The image sensor includes an imaging system and a processing part executing a process using an image acquired by the imaging system. The imaging system is configured by combining a plurality of modularized components. Each of the components includes a non-volatile memory. The processing part is capable of reading and/or writing information from/to the memory of each of the components.

Provided is a technique for facilitating management of an image sensor having a modular structure. The image sensor includes an imaging system and a processing part executing a process using an image acquired by the imaging system. The imaging system is configured by combining a plurality of modularized components. Each of the components includes a non-volatile memory. The processing part is capable of reading and/or writing information from/to the memory of each of the components.

This invention relates to a device comprised of at least two interchangeable modules, wherein at least one module has a power source and/or data storage unit and can transmit power and/or data to all of the electrically and mechanically mated modules. The device is designed for use in extreme weather environments, such as but not limited to, snow, rain, at elevation, and/or under pressure. In addition, each mating point between the at least two modules is waterproof. In a preferred embodiment, the device is comprised of a first module that is an optical head, with at least two optical lenses and can sense and capture image data. A second module is a handle comprised of a battery. When the first and second modules are electrically and mechanically mated, the two modules are secure and waterproof and the device operates as a 360 optical camera with an interchangeable power handle module.

An accessory includes a plurality of communication contacts that includes a first contact, and a control unit that notifies an electronic apparatus of a communication request by changing a signal level of the first contact from a first signal level to a second signal level different from the first signal level, and transmits information indicating a communication factor in response to a reception of a request for the information indicating the communication factor in response to a notification of the communication request. In a case where the control unit notifies the electronic apparatus of the communication request via the first contact in response to a start of a power supply, the control unit performs predetermined communication without receiving the request for the information indicating the communication factor or transmitting the information indicating the communication factor.