This Lens Hood is designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. The black painted ciurcle inside prevents or limits lens flare. No vignetting at wide angle with the hood on. The hood also allows you to attach a Ф46mm filter and a Ф46mm lens cap. No gap between the lens hood and lens front when the lens zoomed out. Replacement Of Nikon HN-40 lens hood. Material: Aluminum Compatibility For: NIKON NIKKOR Z DX 16-50mm F /3.5-6.3 VR lens