X4 Neutral Density Size:86mm which is an ultra clear

which is an ultra clear crown glass

The X4 ND features SCHOTT Superwhite B270® optical glass

and infrared spectrums

It is produced by melting high purity raw materials and then made using the continuous draw process

The result is excellent transmission in the ultraviolet

X4 Neutral Density Size:86mm which is an ultra clearOur cutting edge research and alternative manufacturing methods deliver the most color neutral ND filter for the discerning landscape photographer. In the time that it took us to achieve the X4 NDs unparalleled color neutrality we also took our hand at redesigning the filter frame from the ground up. Sharpness Worlds Sharpest ND Filter. 100% Guaranteed. The X4 ND features SCHOTT Superwhite B270 optical glass, which is an ultra clear crown glass. It is