Canon's EF and EF-S lenses are designed for use with Canon's digital single-lens reflex (DSLR) cameras. The EF lenses are compatible with all Canon DSLR models, while the EF-S lenses are specifically made for Canon's APS-C sensor cameras. This means that EF-S lenses have a smaller image circle, making them unsuitable for full-frame cameras. Both lens types offer a variety of focal lengths and apertures, catering to different photography needs. Canon provides options ranging from wide-angle to telephoto, allowing photographers to capture landscapes, portraits, and more. The choice between EF and EF-S lenses depends on the camera body and the desired photographic effect.