Canon's APS-C refers to a specific sensor size used in many of Canon's digital cameras. The APS-C format measures approximately 22.2 x 14.8 mm, which is smaller than full-frame sensors. This size allows for a crop factor of about 1.6x, meaning that lenses appear to have a longer focal length compared to their full-frame equivalents, making them popular for wildlife and sports photography. Many of Canon's DSLR and mirrorless cameras utilize the APS-C sensor, providing a balance between image quality and camera size. This format is ideal for both amateur and professional photographers, offering versatility and a wide range of compatible lenses.