JJC / KIWIFOTOS SU Series Step-Up Ring Adapters convert the thread size of your lens to the thread size of any other accessory, such as filters, hoods, flashes and lens converters, etc. So you can mount a large threaded accessory to your small threaded lens via this ring adapter. For example, KIWIFOTOS SU 52-82MM permits the use of 82mm filter on lenses with 52mm filter threads. The ring adapter features a lightweight, aluminum-alloy construction that has a corrosion-resistant, black anodized finish for durability. It can be mounted without wobbling or cross-threading yet easily be removed. Up to 60 sizes are available. Product Highlights * Converts the thread size of your lens to the thread size of any other accessory * Allows for mounting a large threaded accessory to your small threaded lens * Durable aluminum-alloy with corrosion-resistant, black anodized finish * Can be mounted without wobbling or cross-threading * Up to 60 sizes are available.