Interchangeable lens camera

A camera, comprising:

• a body;
• and
• a plurality of groups of contacts on the body, wherein
• the plurality of groups of contacts comprises a first group of contacts and a second group of contacts different from the first group of contacts,
• the plurality of groups of contacts is configured to be coupled to a plurality of lenses,
• the plurality of lenses includes a plurality of lens-side mounts, and
• a first length of each of the first group of contacts in a direction of an optical axis of the camera is different from a second length of each of the second group of contacts in the direction of the optical axis of the camera,
• the difference between the first length and the second length is based on a difference between flange back distances of respective lens-side mounts of a first lens of the plurality of lenses and a second lens of the plurality of lenses, the flange back distances are with respect to an imaging plane, and
• the first group of contacts having the first length is configured to couple with the first lens and the second group of contacts having the second length is configured to couple with the second lens.