on an opposite side of the elongated plate the attachment interface allows the cross piece of the clamping mechanisms to be assembled at a plurality of different positions along the length of the elongated plate such that a distance between the two clamping mechanisms is adjustable allowing the clamping mechanisms to be joined to a tubular barrel at two different positions of equal or differing diameter application_number US 201313945124 A description fig1 is an elevation view of an assembled mounting apparatus 103 according to an embodiment of the present invention in this example a dual camera lens arrangement is mounted on a commercially available mounting head 109 atop a commercially available adjustable tripod apparatus 104 a first telephoto lens 101 coupled to a camera 108 is mounted to head 109 and a second telephoto lens 102 having a broader field of vision coupled to a camera 107 is mounted to the first telephoto lens by a mounting apparatus 103 according to an embodiment of the present invention mounting apparatus 103 is joined in this example to a plate 111 of apparatus 103 by two separate clamping assemblies 110 a and 110 b detail of the unique mounting apparatus 103 is provided in descriptions below a commercially available mounting head 105 supports the second telephoto lens upon apparatus 103 and optionally a secondary support and adjustment 106 is provided as well there.