FODSLR 55MM adapter ring for Sony Alpha Series A99 A77 A58 A57 A65 A55 A390 A100 Dslr Cameras - Includes:full Nd2/4/8 Gradual Blue Orange Brown Color Filters + 55mm Adapter Ring + Filter Holder Square Color Filter Set Compatible with Cokin P Series Package includes: 1 x ND2 filter 1 x ND4 filter 1 x ND8 filter 1 x Graduated Gradual brown Filter 1 x Graduated Gradual Orange Filter 1 x Graduated Gradual Blue Filter 1 x 55mm Ring adapter 1 x Filter Holder Gradual filter is a MUST for digital users, because the digital sensor unlike film has very low exposure tolerance. Detail will be lost on both low and high light area. To correct this, you need gradual filter to balance it! Third Party Product Material: Resin Size: 94mm x 83mm