Graduated Neutral-density
From Amazon
Lee Neutral Density 0.3 Grad Hard Filter (100x150 mm Resin) [ND3GH100x150U2]
WEX Photo Video
Lee Neutral Density 0.3 Hard Graduated Resin Filter
Clifton Cameras
LEE Filters 100x150mm 0.3 Neutral Density Filter - Hard Grad