Mirrorless interchangeable lens camera

Main article: Mirrorless interchangeable lens camera

In late 2008 a new type of camera emerged, combining the larger sensors and interchangeable lenses of DSLRs with the live preview viewing system of compact cameras, either through an electronic viewfinder or on the rear LCD. These are simpler and more compact than DSLRs due to the removal of the mirror box, and typically emulate the handling and ergonomics of either DSLRs or compacts. The system is use by Micro Four Thirds, borrowing components from the Four Thirds DSLR system. The Ricoh GXR of 2009 puts the sensor and other electronic components in the interchangeable sensor lens unit rather than in the camera body.^[3]
The first interchangeable 3D lens Lumix G 12.5mm/F12 (H-FT012) has been announced by Panasonic. It use two lenses quite close together in one lens module adaptor and record both 3D and 2D pictures altogether. The lens module is compatible with Panasonic Lumix DMC-GH2.
Digital single-lens reflex cameras (DSLRs) are digital cameras based on film single-lens reflex cameras (SLRs). They take their name from their unique viewing system, in which a mirror reflects light from the lens through a separate optical viewfinder. In order to capture an image the mirror is flipped out of the way, allowing light to fall on the imager. Since no light reaches the imager during framing, autofocus is accomplished using specialized sensors in the mirror box itself. Most 21st century DSLRs also have a "live view" mode that emulates the live preview system of compact cameras, when selected.
These cameras have much larger sensors than the other types, typically 18 mm to 36 mm on the diagonal (crop factor 2, 1.6, or 1). This gives them superior low-light performance, less depth of field at a given aperture, and a larger size.concats 00923224479031