Neutral Density Filter 2" ND 0.9 — Explore Scientific
Amazon.com : NiSi 100x100mm Neutral Density Extreme Filter Kit Includes ND 0.9 (3-Stop) Filter, ND 1.8 (6-Stop) Filter, ND 3.0 (10-Stop), and ND 4.5 (15-Stop) Filter : Electronics
Amazon.com : Polaroid Optics 72mm Neutral Density Filter [ND 0.9] Compatible w/ All Popular Camera Lens Models : Camera Lens Neutral Density Filters : Electronics
B+W 82mm Master ND 0.9 MRC Nano (803M) Filter | Filters | B + W Filters at Unique Photo
Cavision 4 x 5.65" Enhanced Range ND 0.9 Filter FTG4X565ND0.9-D3
New Tiffen 4x5.65" ND 0.9 Glass Filter Neutral Density ND9 MFR #45650ND9 49383020410 | eBay