A lightweight lens barrel that includes two focus lenses. The first lens holding frame for holding a first lens L5, a first drive unit STM5 for causing the first lens holding frame to move in the optical axis direction, a second lens holding frame for holding a second lens L6, and a second drive unit STM6 for causing the second lens holding frame to move in the optical axis direction, the first lens holding frame being arranged on an inner peripheral side of the second lens holding frame.

An optical system for converting light from an object into parallel light, and guiding the parallel light to a plurality of image forming units each configured to form an image of the object includes a first lens unit having positive or negative refractive power and a second lens unit having positive refractive power that are disposed in order from an object side, wherein the first lens unit and the second lens unit are disposed at a widest interval in the optical system, and wherein the first lens unit consists of at least one positive lens and at least one negative lens that are disposed in order from the object side.

An optical system for converting light from an object into parallel light, and guiding the parallel light to a plurality of image forming units each configured to form an image of the object includes a first lens unit having positive or negative refractive power and a second lens unit having positive refractive power that are disposed in order from an object side, wherein the first lens unit and the second lens unit are disposed at a widest interval in the optical system, and wherein the first lens unit consists of at least one positive lens and at least one negative lens that are disposed in order from the object side.

An apparatus includes a first operation member, an assigning unit configured to assign one of a plurality of functions to the first operation member, and a second operation member configured to enable a user to provide a setting relating to a specific function among the plurality of functions. The assigning unit assigns the specific function to the first operation member according to an operation of the second operation member.

There is provided an image processing apparatus comprising. An obtainment unit obtains a first circular fisheye image accompanied by a first missing region in which no pixel value is present. A generation unit generates a first equidistant cylindrical projection image by performing first equidistant cylindrical transformation processing based on the first circular fisheye image. The generation unit generates the first equidistant cylindrical projection image such that a first corresponding region corresponding to the first missing region has a pixel value in the first equidistant cylindrical projection image.

There is provided an image processing apparatus comprising. An obtainment unit obtains a first circular fisheye image accompanied by a first missing region in which no pixel value is present. A generation unit generates a first equidistant cylindrical projection image by performing first equidistant cylindrical transformation processing based on the first circular fisheye image. The generation unit generates the first equidistant cylindrical projection image such that a first corresponding region corresponding to the first missing region has a pixel value in the first equidistant cylindrical projection image.

An imaging optical system includes a first lens group having positive power, a second lens group, and a third lens group. The first lens group includes a sub-lens group G1A, an aperture stop, and a sub-lens group G1B. The sub-lens group G1A includes a lens L1A1 and a lens L1A2. An object-side surface of the lens L1A1 is convex toward an object. The third lens group includes a lens L3E having negative power and a lens L3P located adjacent to, and closer to the object than, the lens L3E.

The present disclosure provides a control device. The control device is configured to control a rotation mechanism to rotatably hold a camera device. The control device includes a processor configured to execute a program to: determine a mounting state of a mounting member mounted on a support mechanism supporting the rotation mechanism; determine a rotation range of the camera device coupled to the rotation mechanism based on the mounting state of the mounting member; and control a rotation of the camera device based on the rotation range.

The present disclosure provides a control device. The control device is configured to control a rotation mechanism to rotatably hold a camera device. The control device includes a processor configured to execute a program to: determine a mounting state of a mounting member mounted on a support mechanism supporting the rotation mechanism; determine a rotation range of the camera device coupled to the rotation mechanism based on the mounting state of the mounting member; and control a rotation of the camera device based on the rotation range.

An interchangeable lens is removably attached to a camera body including a body-side mount, an image sensor, body-side terminals and a first to fourth body-side claws. The interchangeable lens includes the lens-side mount, lens-side terminals which are in contact with body-side terminals, a first to fourth lens-side claws engaged with the first to fourth body-side claws once the interchangeable lens is attached to the camera body. The first and third lens-side claws are disposed on a third lens-side line intersecting with the first lens-side line at an optical axis with approximately 45 degrees. The first lens-side line passes through a center between opposite ends of the first lens-side claw to the optical axis. The second and fourth lens-side claws are disposed on a fourth lens-side line orthogonal to the third lens-side line at the optical axis.