Abstract: A camera lens focus-setting mechanism enabling easy and precise focusing includes a first and a second rack member, and a first and a second adjusting assembly. The first and the second rack member are respectively associated with a first and a second focusing ring, which are respectively mounted around first and second lens holders on a camera, and the first and the second adjusting assembly are located corresponding to the first and the second rack member, respectively. Each of the first and the second adjusting assembly includes a turning bar and a gear driven to rotate by the turning bar, and the two gears separately mesh with racks on the two rack members. By turning the turning bars, the first and the second focusing ring are independently rotated to shift the first and the second lens holder of the camera forward or rearward.