XCSOURCE&reg; 18pcs 37 49 52 55 58 62 67 72 77 82mm Step Up +Step Down Ring Filter Stepping Adapter Set DC453 The ring adapter easily screws onto the front of any lens. It converts the thread size of your lens to the thread size of any other accessory (such as filters, hoods, flashes and lens converters). Extremely solid and lightweight. Specifically designed for your camera for a tight and secure fit. No wobbling or cross-threading. Made of high quality anodized black aluminum (metal). Your camera's lens thread size will be marked somewhere on the lens barrel.