Kenko MC-ND400 Filter

“This filter reduces light values by 8 2/3 stops to just 1/400th of its original intensity and allows safe photography.
Photographing solar eclipses and ultra-bright light sources can be extremely dangerous.
It can also be used to achieve super slow shutter speeds in daylight to render moving subjects invisible.
These ?lters are a?ordably priced, but they have multiple coats on both sides to achieve a ?lter transparency of approximately 98%. The MC series consists of basic lens-protection ?lters such as Protector, UV and 1B Skylight. Despite their reasonable prices, MC ?lters use quality materials for the glass and ?lter frame so that re?ection on the lens isnt interfered with.”