Breakthrough Photography 52mm to 77mm Step-Up Lens Adapter Ring for Filters, Made of CNC Machined Brass with Matte Black Electroplated Finish CNC MACHINED BRASS ADAPTER RING: We manufacture this step-up ring with brass and then apply a matte black electroplated finish, which withstands corrosion and other abrasive elements often encountered in outdoor photography. FITMENT: Compatible with all 52mm camera lenses & 77mm accessories. Your lens thread size will be printed underneath your lens cap or written somewhere on the lens barrel. Make sure you order the correct size otherwise it will not fit your lens. THE MOST DURABLE STEP UP RING: The result of better construction and materials, combined with a proven design makes this step-up ring the most durable and functional step-up ring available to professional outdoor photographers. Also, free lens cloth is included! EXACTLY WHAT YOU ARE LOOKING FOR: The reach and application of this very filter adapter ring is that it involves appropriate traction and gives optimized performance. 25 YEARS SUPPORT: Our step up adapter ring is made up of high quality material brass, which will surely sustain for more than 25 years.