This adapter apparently fits the ocular end of a microscope and then, via 52mm screw thread, a Nikkor lens. Is it 1) specific for the Nikon Microscope, 2) are there adapters for other size microscope barrels and 3) was it specific for the 55mm Micro or will the 105mm also suffice? Whew....! D. A. Higgins "http://www.execpc.com/~raskal"