Free Mirrorless tutorial, The mirrorless interchangeable-lens camera is a class of digital system cameras. This type of camera provides an interchangeable lens mount. They do not have a mirror reflex optical viewfinder. MILC cameras comprise 5% of total camera shipments. After a few years without a well-defined classification, many specialized pages and also major manufacturers are adopting the term DSLM or simply Mirrorless. This standardization in the classification of this group of cameras has been a growing need, since DSLM or Mirrorless has been incorrectly included in the category Digital Compact Cameras. Compact cameras have tiny sensors and do not exchange lenses. Being compact is a quality of DSLM and one of its strongest attributes, which has attracted a growing number of adherents to the system. The DSLM has been manufactured with complete various sensor sizes from 1/2.3", 1/1.7", 1", Micro 4/3, APS-C and Full Frame sensors. And after 2013 DSLR downturn, in early 2014 many camera manufacturers, including Nikon released many MILC including the lenses.