mirrorless camera - Computer Definition
A digital camera that accepts different lenses. Also called a "mirrorless interchangeable-lens camera" (MILC), "hybrid camera" and "compact system camera" (CSC), the body is thinner than a digital SLR (DSLR) because it does not use a mechanical mirror to switch the scene between the optical viewfinder and image sensor. Mirrorless cameras are also called "mirrorless DSLRs" or "mirrorless SLRs" because they support multiple lenses like a single lens reflex camera and generally offer an optional viewfinder. Introduced in 2008, mirrorless cameras became popular in the 2011 time frame and are becoming the choice of amateur photographers who want to migrate from point-and-shoot cameras. As these hybrids continue to increase sensor size and add high-end features, as well as offer a wide variety of lenses, they are expected to give the bulkier digital SLRs a run for their money. See DSLR and viewfinder.