Pixco 48mm-52mm Step-Up Metal Filter Adapter Ring 48mm Lens to 52mm Accessory The male thread to camera lens: 48mm The female thread to filter: 52mm Made of high quality anodized black aluminum (metal). Compatible with: Filters, lenses, adapters, lens hood, and ect. The 48-52mm ring adapter easily screws onto the front of any 48mm lens, and converts the thread size of your lens to the thread size of any other 52mm accessory (such as filters, hoods, flashes and lens converters).