Canon Kabushiki Kaisha

Masahisa Tamura

Kunihiko Sasaki

Toshinori Yamazaki

Masayasu Shigematsu

Toru Matsumoto

Katsuhiro Inoue

Shigehiro Torii

Kazuaki Yamana

Jun Sugita

Atsushi Koyama

Ryuji Suzuki

Ichiro Okumura

Masanori Ishikawa

Tohru Kawai

Tadanori Okada

Tatsuya Sato

Haruhisa Ueda

Haruhiko Yamanouchi

Seishiro Takano

Haruki Ota

Takumi Yamanaka

Shota Shimada

Eiri Tsukatani

Yasushi Murakami

Takeya Nakayama

An accessory attachable to and detachable from an image pickup apparatus includes a second mount portion including a plurality of second bayonet claw portions capable of engaging with a plurality of first bayonet claw portions, a plurality of second terminals capable of contacting with a plurality of first terminals, an accessory body, and a mount fixing member for fixing the second mount portion to the accessory body. The plurality of second terminals is provided at positions different from positions of the plurality of second bayonet claw portions, and all of multiple second terminals, among the plurality of second terminals, used in communication between the image pickup apparatus and the accessory are provided at predetermined positions.

Accessory, image pickup apparatus on which same is mountable, and camera system

An interchangeable lens assembly includes a plurality of lens-side claw portions configured to be engaged with a plurality of camera-side claw portions, and a lock pin groove portion into which a lock pin is inserted, a lens barrel, and a lens mount fixing member. When θ1 is an angle formed by a line passing through a fifth lens-side end and an optical axis, and a line passing through a center of the lock pin groove portion and the optical axis, and θ2 is an angle formed by a line passing through a fourth lens-side end and the optical axis, and a line that passes through the center of the lock pin groove portion and the optical axis, θ1 and θ2 satisfy a predetermined conditional expression.

An accessory configured to be detachably mountable to an image pickup apparatus including a first mount portion including first bayonet claw portions, and first terminals, the accessory including a second mount portion including second bayonet claw portions configured to enable engagement with the first bayonet claw portions, and second terminals configured to enable contact with the first terminals, in which the second terminals are provided at positions that are different from positions of the second bayonet claw portions, and wherein, a half line that extends from a central axis of the second mount portion and passes through a second terminal that determines whether an optical apparatus is mounted on the image pickup apparatus or not, passes through a predetermined second bayonet claw portion.

An interchangeable lens assembly includes a plurality of lens-side claw portions configured to enable engagement with a plurality of camera-side claw portions, and a lock pin concave portion in which a lock pin is inserted. Furthermore, &#x3b8;1 is an angle formed by a line passing through a fifth lens-side end and an optical axis, and a line passing through a center of a lock pin concave portion and the optical axis, and &#x3b8;2 is an angle formed by a line passing through a fourth lens-side end and the optical axis, and a line that passes through the center of the lock pin concave portion and the optical axis. In the above, &#x3b8;1 and &#x3b8;2 satisfy a predetermined conditional expression.

An image capturing apparatus includes a first mount portion and a first cylindrical member that has a color different from a color of the first mount portion and is disposed in a circumferential direction of the first mount portion, an accessory includes an exterior portion, a second mount portion, and a second cylindrical member having a color different from a color of the second mount portion and similar to a color of the first cylindrical member and disposed in a circumferential direction of the second mount portion, and in a state where the accessory is attached to the image capturing apparatus, reference surfaces of the first mount portion and the second mount portion are in contact with each other, and the first cylindrical member and the second cylindrical member are externally exposed regardless of whether the accessory is attached to or detached from the image capturing apparatus.

Image capturing apparatus, accessory, camera system including image capturing apparatus and accessory

An interchangeable lens assembly includes a plurality of lens-side claw portions configured to be engaged with a plurality of camera-side claw portions, and a lock pin groove portion into which a lock pin is inserted, a lens barrel, and a lens mount fixing member. When &#x3b8;1 is an angle formed by a line passing through a fifth lens-side end and an optical axis, and a line passing through a center of the lock pin groove portion and the optical axis, and &#x3b8;2 is an angle formed by a line passing through a fourth lens-side end and the optical axis, and a line that passes through the center of the lock pin groove portion and the optical axis, &#x3b8;1 and &#x3b8;2 satisfy a predetermined conditional expression.

Adapter for camera lens

Growing community of inventors

Utsunomiya, Japan

Masahisa Tamura