ITEM NAME:1pc Vented Curved Metal lens Hood For Leica Canon Nikon Panasonic 49mm B9O5 C8C4 Description&Preview.It will fit for all 49mm size lens. Thread : 49mm. Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. All pictures are for illustration purpose only and Colours may vary slightly.