Without a lens mount, a substantial portion of the lens assembly can be fitted inside of the camera body right up to the sensor. This makes it possible to fit a larger sensor or a lens with a larger aperture compared to a camera and interchangeable lens combination of similar size.
The Leica Q series, Fujifilm X100 series, and Ricoh GR series are popular cameras in this category. This list excludes cameras with removable sensors, such as the Phase One XC.
^The Panasonic CM10 is essentially the same device as the Panasonic CM1 except without the ability to make a phone call, which makes it not a smartphone.
^The DxO ONE was designed to be attached to a smartphone. However, it can be used as a standalone camera because it has a small screen that can display live view.
^This lens-style camera has no screen or viewfinder at all. It was designed to be attached to a smartphone so that the phone’s screen could be used as the camera’s display.