Zoom ratio
The relationship between the shortest and longest focal length on a zoom lens. For example, a 16-35mm lens has a zoom ratio of 2.2x; a 50–500mm lens has a zoom ratio of 10x.
The relationship between the shortest and longest focal length on a zoom lens. For example, a 16-35mm lens has a zoom ratio of 2.2x; a 50–500mm lens has a zoom ratio of 10x.