Is an Ef 24mm angle as wide as an EF-S 24mm angle when mounted on a cropped frame?

[Steve in HB]

Remember, an EF 24-105 mm on a "cropped" camera body (such as the 4Ti) is actually a 38.4mm x 168 mm focal length lens. Therefore, the FOV with the lens set to 24mm on the full frame camera would be different than the FOV with the lens set to 24mm on the "cropped" body camera. As I understand it (and boy, could I be wrong!) as the focal length changes so does the field of view. The EF-S lens is simply a lens that will only fit onto the cropped body camera, not the full frame. Nevertheless, at 24mm, the lens focal length is still actually 38.4mm, not 24mm. Therefore, see above.