The ACCU-Beam ® Universal Video Adaptor is the only adaptor that gives you a choice of image magnification with either 1CCD or 3CCD Video Cameras. Universally adaptable to Surgical Microscopes from Zeiss, Leica, Moller-Wedel, Global, Seiler, Aus Jena, Kaps, Topcon, Vasconcellos, Marco, Takagi and Inami.U.S. Patent No. 5,264,928