Canon full frame DSLRs

Full frame DSLRs are called full frame because they have 36x24mm sensors, the same size as film that older SLRs used.

Digital SLRs (also called DSLRs) are the digital equivalent of the old film SLRs. SLR cameras all have interchangeable lenses, and an optical viewfinder that lets you look through the lens and see exactly what the camera will capture when you take a photo.