So, shooting with a full-frame sensor offers a couple of real-world practical advantages over shooting with a camera using an APS-C size sensor. When shooting sports, landscapes, or world events and news, the full-frame sensor permits you to capture more of the scene than you would with the same lens on a camera using an APS-C sensor. In addition, when shooting for a specific composition, the full-frame sensor lets you get substantially closer to your subject than you would with a camera using an APS-C sensor.
In the next part of this series, I’ll contrast Canon EF series lenses shooting on the Canon 20D to comparable shots captured using a couple of Canon EF-S lens. The "-S" designation indicates that a Canon lens was designed for use with APS-C size sensors (The 20D, 30D, 40D, and the Canon Rebels), and cannot be used with other models.