Haida 150mm ND1000 Neutral Density Filter - 3.0 Optical Glass for Long Exposure Photography - Perfect for Landscape, Waterfall & Daylight Shooting

At the beginning I am sorry for my language, English not my native languageAs a photographer on a budget i try many filters including the less and the most expensive ( Lee filter )I want to talk about 3 important point ,they are the main point for any photographer want to buy nd filter1 ) build quality : it's a real glass and it's not easy to scratch2) sharpness : this filter is great , it doesn't cause any sharpness decrease3) color cast : it's cause little cold color cast ( little ) it's easy to correct by just add +2 yellow and +3 magenta .Those three points , the reasonable price and the fact it's come with a butterfl metal case make this filter number one in the market .To be honest there is only one small problem with this filter, it's the light leak gasket ( fome ) it causes some vignetting , you can minimizing it by cutting the inner corners and make it a 90 degreeFinally I hope in the near future I gonna be able afford money to buy the 150mm 10 stop nd and the 150mm holderfor tamron 15-30mm