The 49mm Filter Adapter serves as a replacement for the stock trim ring, allowing you to put a PolarPro filter on with ease - especially the Everyday Filter by Shortstache. Crafted from brass, it minimizes the risk of cross threading while ensuring durability. Specifically designed for compatibility with Fuji X100VI, X100V, X100, X100S, and X70 cameras, this adapter seamlessly integrates with the stock lens cap for hassle-free operation.