What does Canon Camera 18-135 mean?

Canon camera 18-135 refers to the focal length range of the lens.

focal length range, the exact name should be the zoom range of the lens, which refers to the change range of the zoom lens from wide angle to narrow angle (short focus to long focus).

canon 18-135 lens is a standard lens with a focal length range of 18-135mm. Filter size: 67mm lens structure: 12 groups of 16 pieces. Maximum aperture: F3.5-F5.6 Minimum aperture: F22-36.