Sony offers a number of interchangeable-lens cameras in its α (Alpha) line. The line has featured cameras employing three different imaging technologies and two mounts: * Digital single-lens reflex cameras (DSLR) - early α models with three-digit model numbers employ this technology; they all feature . * SLT (defined by Sony as "single-lens translucent") - similar in appearance to a DSLR, but featuring a fixed semi-reflective mirror. All cameras employing this technology have had two-digit model numbers, with model designations of the form "SLT-A##" or "ILCA-##". Like DSLRs, they all feature Sony's A-mount. * Mirrorless interchangeable-lens cameras - these cameras have no mirror between the lens and sensor. All NEX and ILCE models use this technology and feature . (In addition to these cameras, Sony also offers E-mount cameras, which are not part of the α line, but the Handycam, NXCAM and XDCAM systems.) * Sony ILCE camera - Interchangeable Lens Camera with E-mount * Sony ILCA camera - Interchangeable Lens Camera with A-mount List of Sony A-mount cameras List of Sony α system E-mount cameras