Use this Dedlight Prolycht Bowens Long Lens Mount Adapter to fit your Orion 675 FS or 300 FS light head for DP400 projector systems with longer focal length requirements. Compatible with projectors using the DP400CON condenser as their base, this mount adapter easily secures to your light head. Installing the adapter to your light expands compatibility to suit projectors compatible with 185 and 150mm lens lengths.