I already had several Nikon 52mm filters so I got a bay50 to 52mm adapter and continue to use the 52mm filters for both this lens and the Nikon lenses. I also use ascrew-in lenshood with very satisfactory results. I use the camera on a tripod and if the sun is shining on the lens in spite of the hood and is not in the ground glass image I will shade the lens with the dark slide.