Accessory and imaging apparatus

An imaging apparatus to which an accessory is detachably mountable, and which is capable of communication with the accessory when the accessory is mounted to the imaging apparatus, the accessory being a lens apparatus having an optical system or an intermediate accessory mountable between the imaging apparatus and the lens apparatus, the imaging apparatus comprising:

• a mount unit which is capable of coupling with the accessory;
• and
• a plurality of electric contacts arrayed at the mount unit,
• wherein the plurality of electric contacts include:
• a fifth electric contact configured to supply electric power,
• a sixth electric contact configured to set a ground level of a first camera-side electric contact,
• a seventh electric contact connected to a CMOS-type interface in the imaging apparatus and configured to transmit and receive data, and
• an eighth electric contact connected to an open-type interface in the imaging apparatus and configured to make notification of a timing relating to communication using the seventh electric contact, and
• wherein the eighth electric contact is disposed adjacent to the sixth electric contact on the mount unit, and the seventh electric contact is disposed on the opposite side of the eighth electric contact from the sixth electric contact.

A camera system, comprising:

• an imaging apparatus;
• and
• a lens apparatus configured to be detachably mountable to the imaging apparatus,
• wherein the lens apparatus comprising:
• a first mount unit where a plurality of electric contacts are arrayed,
• wherein the plurality of electric contacts arrayed on the first mount unit include:
• a first electric contact configured to receive supply of electric power from the imaging apparatus,
• a second electric contact configured to set a ground level of the first electric contact,
• a third electric contact connected to a CMOS-type interface in the lens apparatus and configured to transmit and receive data between the imaging apparatus and the lens apparatus, and
• a fourth electric contact connected to an open-type interface in the lens apparatus and configured to make notification of a timing relating to communication using the third electric contact, and
• wherein the fourth electric contact is disposed adjacent to the second electric contact on the first mount unit, and the third electric contact is disposed on the opposite side of the fourth electric contact from the second electric contact,
• wherein the imaging apparatus comprising:
• a second mount unit where a plurality of electric contacts are arrayed,
• wherein the plurality of electric contacts arrayed on the second mount unit include:
• a fifth electric contact configured to be connected to the first electric contact and supply electric power to the lens apparatus,
• a sixth electric contact configured to be connected to the second electric contact and set the ground level of a fifth electric contact,
• a seventh electric contact connected to a CMOS-type interface in the imaging apparatus and configured to be connected to the third electric contact and transmit and receive data between the imaging apparatus and the lens apparatus, and
• an eighth electric contact connected to an open-type interface in the imaging apparatus and configured to connected to the fourth electric contact and make notification of the timing relating to communication using the seventh electric contact, and
• wherein the eighth electric contact is disposed adjacent to the sixth electric contact on the second mount unit, and the seventh electric contact is disposed on the opposite side of the eighth electric contact from the sixth electric contact.

A camera system, comprising:

• an imaging apparatus;
• a lens apparatus configured to be detachably mountable to the imaging apparatus;
• and
• an intermediate accessory configured to be detachably mountable between the imaging apparatus and the lens apparatus,
• wherein the intermediate accessory comprising:
• a first mount unit where a plurality of electric contacts are arrayed,
• wherein the plurality of electric contacts arrayed on the first mount unit include:
• a first electric contact configured to receive supply of electric power from the imaging apparatus,
• a second electric contact configured to set a ground level of the first electric contact,
• a third electric contact connected to a CMOS-type interface in the intermediate accessory and configured to transmit and receive data between the imaging apparatus and the intermediate accessory, and
• a fourth electric contact connected to an open-type interface in the intermediate accessory and configured to make notification of a timing relating to communication using the third electric contact, and
• wherein the fourth electric contact is disposed adjacent to the second electric contact on the first mount unit, and the third electric contact is disposed on the opposite side of the fourth electric contact from the second electric contact,
• wherein the imaging apparatus comprising:
• a second mount unit where a plurality of electric contacts are arrayed,
• wherein the plurality of electric contacts arrayed on the second mount unit include:
• a fifth electric contact configured to be connected to the first electric contact and supply electric power to the intermediate accessory,
• a sixth electric contact configured to be connected to the second electric contact and set the ground level of a fifth electric contact,
• a seventh electric contact connected to a CMOS-type interface in the imaging apparatus and configured to be connected to the third electric contact and transmit and receive data between the imaging apparatus and the intermediate accessory, and
• an eighth electric contact connected to an open-type interface in the imaging apparatus and configured to connected to the fourth electric contact and make notification of the timing relating to communication using the seventh electric contact, and
• wherein the eighth electric contact is disposed adjacent to the sixth electric contact on the second mount unit, and the seventh electric contact is disposed on the opposite side of the eighth electric contact from the sixth electric contact.

A lens apparatus detachably mountable to an imaging apparatus and capable of communication with the imaging apparatus when mounted to the imaging apparatus, the lens apparatus comprising:

• an optical system;
• a mount unit which is capable of coupling with the imaging apparatus;
• and
• a plurality of electric contacts arrayed at the mount unit,
• wherein the plurality of electric contacts include:
• a first electric contact configured to receive supply of electric power,
• a second electric contact configured to set a ground level of the first electric contact,
• a third electric contact connected to a CMOS-type interface in the lens apparatus and configured to transmit and receive data, and
• a fourth electric contact connected to an open-type interface in the lens apparatus and configured to make notification of a timing relating to communication using the third electric contact, and
• wherein the fourth electric contact is disposed adjacent to the second electric contact on the mount unit, and the third electric contact is disposed on the opposite side of the fourth electric contact from the second electric contact.