Abstract: An optical lens assembly is disclosed as including a light-sensitive member; first and second lenses/lens groups with their respective optical axis aligned with each other along a common optical axis; and first and second piezo electric ultrasonic linear motors; in which the first motor is operable to move the first and second lenses/lens groups relative to each other to vary their distance; and the second motor is operable to move the light-sensitive member or at least one of the first and second lenses/lens groups to vary the distance between the light-sensitive member and the lens/lens group. A handheld electronic device, e.g. a mobile phone or a personal digital assistant, with digital camera function, and including such an optical lens assembly is also disclosed.