Sony ALC-SH158 Lens Hood for FE 600mm f/4 GM OSS Lens

The bayonet mount ALC-SH158 Lens Hood for FE 600mm f/4 GM OSS Lens from Sony is used to block stray light from entering the lens and causing lens flare. It will protect the lens from accidental impact in case the lens is dropped or slammed against a wall. The hood also serves as a replacement if the original that came with the lens is lost.