Optical apparatus accessory and optical apparatus

1. An optical apparatus accessory detachably attachable to an optical apparatus by relative movement with the optical apparatus, the accessory comprising:

multiple terminal faces arranged in a direction of the relative movement and allowed to make contact with multiple terminal pins provided in the optical apparatus to establish an electric contact between the accessory and the optical apparatus; and

electric insulation portions provided between each two adjacent terminal faces among the multiple terminal faces, wherein, when a position in a direction from the terminal face toward the terminal pin in a state where attachment of the accessory and the optical apparatus is completed is defined as a height, the multiple terminal faces are arranged at a same height, each of the electric insulation portions includes (a) two adjacent-to-terminal portions respectively adjacent to the two adjacent terminal faces and (b) a convex portion provided between the two adjacent-to-terminal portions and having a higher height than that of the two adjacent-to-terminal portions, the two adjacent-to-terminal portions have a height same as or lower than that of the terminal faces,

and the convex portion has a height same as or higher than that of the terminal faces.

2. An accessory according to claim 1 , wherein the accessory includes an optical system, and

wherein a surface on which the terminal faces are arranged is orthogonal to an optical axis direction of the optical system.

3. An accessory according to claim 1 , wherein the accessory is provided with an accessory mount to be coupled with an optical apparatus mount provided with the optical apparatus by relative rotation with the optical apparatus mount, and

wherein the multiple terminal faces are arranged in the accessory mount in a direction of the relative rotation.

4. An accessory according to claim 1 , wherein a width of the electric insulation portion in the direction of the relative movement is smaller than an outer diameter of the terminal pin.

5. An accessory according to claim 1 , wherein the accessory is an interchangeable lens detachably attachable to an image pickup apparatus as the optical apparatus.

6. An optical apparatus to which an optical apparatus accessory is detachably attachable by relative movement with the accessory, the accessory comprising:

multiple terminal faces arranged in a direction of the relative movement and allowed to make contact with multiple terminal pins provided in the optical apparatus to establish an electric contact between the accessory and the optical apparatus; and

electric insulation portions provided between each two adjacent terminal faces among the multiple terminal faces, wherein, when a position in a direction from the terminal face toward the terminal pin in a state where attachment of the accessory and the optical apparatus is completed is defined as a height, the multiple terminal faces are arranged at a same height, each of the electric insulation portions includes (a) two adjacent-to-terminal portions respectively adjacent to the two adjacent terminal faces and (b) a convex portion provided between the two adjacent-to-terminal portions and having a higher height than that of the two adjacent-to-terminal portions, the two adjacent-to-terminal portions have a

height same as or lower than that of the terminal faces and the convex portion has a height same as or higher than that of the terminal faces, and

wherein the apparatus has a configuration which holds the multiple terminal pins such that each terminal pin is movable in a direction of protruding toward the terminal face and in an opposite direction thereto and which biases each terminal pin in the direction of protruding toward the terminal face.

7. An optical apparatus according to claim 6 , wherein the optical apparatus is an image pickup apparatus to which an interchangeable lens is detachably attachable.