Digital SLR Camera

A digital single-lens reflex camera (digital SLR camera or DSLR) is a digital camera that uses an automatic mirror system placed between the lens and the image sensor to direct the image from the lens through the viewfinder where it can be viewed by the photographer. The viewfinder includes a matte focusing screen at its focal plane, to allow accurate focusing and to allow the light into the prism that directs the light through the viewfinder. As in film SLRs, the through-the-lens optical viewing is primarily to support accurate fast view finding with interchangeable lenses.

The basic operation of a DSLR, having the mirror reflecting the image away from the image sensor except briefly during the exposure, precludes the ability to see the image in the LCD display before the picture is taken, a major difference from the way an ordinary digital camera (digicam) works. Some newer DSLR models feature an option generally known as "live preview" that does allow the image to be seen on the LCD display, although with certain limitations and with the optical viewfinder disabled.

In most other respects a DSLR is similar in principle and operation to a standard digital camera; the image captured by the CCD or CMOS image sensor is processed electronically and stored on a removable memory device. The price range and extra features and options available vary widely from model to model, and newer and better models arrive every year.

Home | Hosting | Rechargeable battery | Digital photo printing | Digital home theater | Computer Storage | RAM | Camera | Sitemap | Reviews