The adapter connects the giant SFFX2 field flattener to the Moonlite Nitecrawler focuser. It threads to the SFFX2 and has a male M93.5 thread that is made for the Moonlite 3.5" Nitecrawler focuser. It has a knurled ring between the threads to facilitate easy removal and only adds about 3.25 mm of focus length.
