What are SLR and DSLR cameras?
An SLR is a camera with a reflex optical viewfinder (OVF). This means that when looking through the viewfinder, you see light entering the lens and reflected to your eye, as opposed to what the camera’s sensor is recording. A DSLR is a Digital SLR. The Digital SLR basic page explains the important differences between a DSLR camera and regular digital cameras.