The Reversible Lens Hood Kit for Sony E PZ 16-50mm F3.5-5.6 OSS E-Mount Power Zoom Lens from Fotodiox is a tulip-design lens hood that blocks stray and extraneous light from entering the lens, preventing lens flare. It also protects the lens from accidental impact, which would cause damage.
The included mounting ring has threads of 40.5 and 52mm diameters. The Lens hood itself has 52mm threads and screws onto the mounting ring, which is then screwed onto the lens. The hood can be reversed on the mounting ring for storage. Because the hood mounts to the ring, the filter and lens cap stay in place without having to remove them. Additionally, you can use the original Sony lens cap or the lens cap included with kit.