The #17 video adapter systems adapts a shutter housing and a Nikon lens to a video camera that is equipped with C mount thread (1.00in x 32TP1). No modification to the camera should be necessary. The shutter unit replaces a standard F-C mount (see drawing for F-C mount outline for comparison). This adapter is available only with the VS14/25 shutter units and is integral to the housing. A similar configuration can also be ordered for the VS35, CS25, CS35 or CS45 shutter series.