What does the wide angle of the camera mean? Who is bigger, 24 mm or 28mm?

The wide angle of a camera is actually relative to a standard lens. If the viewing angle is larger than the standard lens, it can also be regarded as a wide angle lens. But in fact, everyone is distinguished by the focal length of the lens, and the focal length less than 28mm is the wide-angle head. Wide-angle lens can shoot a wider scene, which is mostly used for landscape photography.

24 and 28 are both wide-angle lenses. The wide angle of 24mm is larger than that of 28mm, and the lens angle is wider. The same shooting distance will expand the scope of the included scenery. Their scene reception angles are about 100 degrees and 85 degrees respectively, which is only an estimate.