The ACCU-Beam® Universal Dual Camera Adaptor provides simultaneous video and 35mm photographic documentation. Most 35mm SLR Cameras and Video Cameras can be mounted. 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