Irix Edge Light Stopper for IFH-100-PRO

The IFH-100-PRO holder has a drop-in slot for a polariser. Leave it empty and the slot is an opening, which is fine at ND8 and a real problem at ND1000 or ND32000 where a two-minute exposure will find any light the holder lets in.

The Light Stopper is the blank that fills the slot. It is 0.3 mm thick and 101 mm across, drops in where the polariser would go, and closes the path that produces reflections and flare inside the holder. Ten grams, and it stays in the bag with the dense filters it protects.