CPL Filter: unnecessary polarizing light to make the picture clearer and more transparent, generally used for landscape photography ND Filter: More to control apertures and the-shutters, bring more for creative space for photography, and effectively overexposure Brushed(Streak) Filter: Allows your to easily record for glare and brushed effects, producing a brushed effect like a wide-screen movie lens NIGHT Filter: Anti-light pollution filter, which can effectively reduce light pollution and bring out the true colors of the for image Aviation aluminum frame, and not easy to quick design for easy installation