DA09 Lens Hood is designed to prevent unwanted light from entering the lens. It is especially useful for eliminating glare and protecting the front of a lens.
Tamron SP AF 17-50mm F/2.8 XR Di II LD
Tamron SP AF 28-75mm F/2.8 XR Di LD
*DOES NOT WORK ON TAMRON 28-75mm f/2.8 Di III RXD for Sony E