... for ultra wide angle lens.free to rotate to your deserved density 1.This adjustable neutral density filter offers a 2 to ... filter is rotated (similar mechanism to a CPL filter).2.To avoid vignetting, we use 2 stop ... , equips with a 67mm back thread (attach to camera lens), and a 77mm front glass/ ... 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, 86mm.4.apply slow shutter speed under strong sunlight exposure. TIANYA ...