What Is A Full Frame Camera?

A full-frame camera has a sensor size which is 36mm x 24mm. This is exactly the same size as the film in a 35mm camera. Typically, SLR cameras used 35mm film, so when digital cameras were introduced, the camera film was replaced with a sensor of the same dimensions.

Full-frame cameras used to be only DSLRs, but now you can get full-frame mirrorless cameras.