H&Y Filters ND8 (3 Stop) Magnetic Clip-On Filter for RevoRing (58-77mm) 55mm I took the opinions of

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Anodized Finish Prevents Corrosion

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H&Y Filters Drop-in (95mm) ND4000 Filter

H&Y Filters ND8 (3 Stop) Magnetic Clip-On Filter for RevoRing (58-77mm) 55mm I took the opinions ofH&Y Filters ND8 (3 Stop) Magnetic Clip On Filter for RevoRing (58 77mm) Key Features ND8 (3 Stop) 0. 9 Optical Density Double Sided 9 Layer Multicoating Water Repellent Resistance Coating 2mm Thick Optical Glass Fits Select 58 77mm RevoRing Products Darkens Entire Image Area Allows Reduced Shutter Speed Allows Wider Aperture Magnetic Frame H&Y Magnetic ND Clip on Filter is designed as a cross polarization cure for wide or ultra wide angle lenses.