A mirrorless interchangeable-lens camera (MILC), frequently simply mirrorless camera, increasingly called DSLM (digital single lens mirrorless), and sometimes also called EVIL (electronic viewfinder, interchangeable lens) features a single, removable lens and uses a digital display system rather than an optical viewfinder. The word "mirrorless" indicates that the camera does not have an optical mirror or an optical viewfinder like a conventional digital single-lens reflex camera (DSLR), but an electronic viewfinder which displays what the camera image sensor sees.
In many mirrorless models, the mechanical shutter remains. Like a dSLR, an interchangeable lens mirrorless camera accepts any of a series of interchangeable lenses compatible with the lens mount of that camera. A mirrorless interchangeable lens camera is an alternative to the digital single-lens reflex camera (DSLR).