no ND filter , just a lense with a plain glass filter , there wasnt really a lot around to use as a reference as this was taken on a sea front and i wanted to get the sun centres, which i suppose i could have done coming futher out and not zoomed in so much . Only a litle while since i have had the camera so just realizing what i can do with it. thanks for your scoments, would a filter give it more depth