What are the main differences between an EF and EF-S lens, and how do these differences affect the overall performance and compatibility with different camera bodies?

EF lenses are designed for full-frame cameras, while EF-S lenses are designed for APS-C sensor cameras. EF lenses have a larger image circle, allowing them to work on both full-frame and APS-C cameras. EF-S lenses have a smaller image circle, limiting their compatibility to APS-C cameras only. This affects the overall performance as EF lenses may provide better image quality on full-frame cameras, while EF-S lenses are more compact and lightweight. Compatibility-wise, EF lenses can be used on both full-frame and APS-C cameras, while EF-S lenses are restricted to APS-C cameras only.