When on set, we often have the need to look directly at strong sources of light, which can cause irreparable harm to your eyes. The viewing filter works just like an ND filter to protect your eyes by reducing the amount of light to help you determine the position of the lights or sun. The NiSi Viewing filters are made of aviation grade aluminium, with easy to replace, removable glass. The back has a silicone eyecup to stop light leaks. The 10 Stop IRND Viewing filter uses NiSi’s nano-coating technology to stop UV and IR light while reducing visible light.