DSLR cameras

DSLR cameras also referred to as digital SLR cameras or digital single lens reflex cameras are different from the digital live preview cameras to an extent and they function with the help of a regular mirror system which is automatic and a significant feature called pentaprism which allows the light rays to be directed from the lens via the viewfinder. The functioning of the digital SLR cameras is dependent on several factors. In case of taking a photograph, at first the light rays are reflected by the mirror though the attached lens at a more or less ninety degree angle. At this juncture the pentaprism enables the light to penetrate into the eyes of the photographer. The final moment when the photograph is actually taken, the mirror takes an upswing thus enabling the lens to throw light into the image sensor. In case of the common digital cameras, the image sensors are constantly exposed to the light rays’ reflected by the lenses and therefore the screen itself becomes the electronic viewfinder. However, on the contrary the presence of the mirror in digital SLR cameras enables them to view the image in an LCD screen before finally taking the photograph. But nowadays it is found that a growing number of digital SLR cameras have also incorporated the live preview function as a result of which the LCD display is similarly used as viewfinder.

The digital SLR cameras are characterized by swift focusing properties and this is enabled by the phase detection autofocus system. Though several digital SLRs are using live preview properties, most of these possess the optical viewfinder and this is often more skilful in functioning as it unlike the electronic viewfinders they usually display the image as it is going appear as the final photograph as the light rays here are emitted from the lens itself. Some of the present manufacturers of digital SLRs include SLRs include Sony, Canon, Fujifilm, Panasonic, Olympus and Nikon