[Pre Order - allow extra time] Urth ND Lens Filter Kit Plus+ (49mm) 0.9, 1.8 & 3.0 Optical Density, 3-, 6- & 10-Stop Filters, 20-Layer Nano-Coating, B270 Schott Optical Glass, Ultra-Slim Magnalium Rim, Double-Threaded for Stacking Filters