Question: what the difference between aps c and full frame?
Answer: A full-frame lens is roughly equivalent to a 35mm frame of film, while an APS-C sensor is a little bit smaller. ... The effect is that a 50mm full frame lens mounted on an APS-C body with a 1.5x crop factor will capture a field-of-view that is the same as a 75mm on a full frame body. For Canon, this crop factor is 1.6x.