DLSR Camera

DSLR Camera

Digital single-lens reflex cameras (digital SLR or DSLR) are digital camera that use a mechanical mirror system and pentaprism to direct light from the lens to an optical viewfinder on the back of the camera.
Due to theirreflex design system DSLRs are often preferred by professional still photographers because they allow an accurate preview of framing close to the moment of exposure. Many professionals also prefer DSLRs for their larger sensors compared to most compact digital cameras. DSLRs have sensors which are generally closer in size to the traditional film formats that many current professionals started out using. These large sensors allow for similar depths of field and picture angle to film formats, as well as their comparatively high signal to noise ratio. DSLRs also allow the user to choose from a variety of interchangeable lenses. Most DSLRs also have a function that allows accurate preview of depth of field.

The term DSLR generally refers to cameras that resemble 35 mm format cameras, although some medium format cameras are technically DSLRs.

Comparison with digital point-and-shoot camera

The reflex design scheme is a major difference between a DSLR and an ordinary digital point-and-shoot camera. In the reflex design scheme, the image captured on the camera's sensor is also the image that is seen through the view finder. Light travels through a single lens and a mirror is used to reflect a portion of that light through the view finder - hence the name Single Lens Reflex. While there are variations among point-and-shoot cameras, the typical design exposes the sensor constantly to the light projected by the lens, allowing the camera's screen to be used as an electronic viewfinder.