Kase

Magnetic Neutral Density Filter 64x Filter Factor, 6-Stop Darkens Entire Image Reduce Shutter Speeds, Widen Apertures Optical Glass, Multi-Coated Surfaces Tempered, Shock Resistant Magnetic Lens Adapter Ring Fits Lenses with 77mm Filter Threads For Kase Wolverine Magnetic Filters Steel Construction

Magnetic Neutral Density Filter 64x Filter Factor, 6-Stop Darkens Entire Image Reduce Shutter Speeds, Widen Apertures Optical Glass, Multi-Coated Surfaces Tempered, Shock Resistant Magnetic Lens Adapter Ring Fits Lenses with 95mm Filter Threads For Kase Wolverine Magnetic Filters Steel Construction