The protector filter is designed to protect the lens from dust or dirt. The Super EBC (Electron Beam Coating) of these would control harmful borrowed light effectively.
Super EBC is effectively limiting harmful reflections by achieving a surface reflectivity of 0.3% or less.
X100V / X100F / X100T / X100S / X100 / X70
XF16mmF2.8 R WR
*Attach the adapter ring AR-X100 / LH-X100 exclusively designed for X100V / X100F / X100T / X100S / X100, then attach the filter.