One end of the adapter has 38 mm inner diameter, the other end has c-mount thread for attaching stardard c-mount adapter, video cameras, digital camera for micro-photography! It has 0.7X parfocal adjustable relay lens so that the camera can zoom out with larger field of view!Diameter to insert into nikon phototube at one end. C-mount threads on the other end. Specially designed for NIKON E100, E200,50i, 55i, 80i, 90i, Ni series, Ti Series, SMZ800, SMZ1000, SMZ15000 biology microscopes and industrial microscopes. 1/1.8", 1/2", 1/2.5. NIKON E100, E200,50i, 55i, 80i, 90i, Ni. PLS NOTE THAT:THIS ITEM WAS NOT MADE BY NIKON. Directed from factory, welcome wholesaler! It is easy and safe! 100% satisfaction is our goal!
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