This size is suitable for 67mm diameter hoodNeed Other Sizes?49mm:https://www./Yerwal-Petal-type-Screw-Canon-Nikon/dp/B01J62M24E?ie=UTF8&*Version*=1&*entries*=052mm:https://www./Yerwal-Petal-type-Screw-Canon-Nikon/dp/B01J62GDRQ?ie=UTF8&*Version*=1&*entries*=0Function: (1) In the backlight・ side light or flash photography・ to prevent the entry of non-imaging optical avoid mist.(2) In the light and side light photography along・ to avoid scattering light into the lens around.(3) In light photography or night photography・ interference can be avoided around the light entering the lens.(4) to prevent accidental damage to the lens・ also avoid finger inadvertently lens surface・ but also to some extent for the lens block the wind・ rain and snow. Lens hoods are one of the most important accessories you can purchase to improve the quality of your photos. It can help prevent those circles of light that can accompany images where a strong light source is just outside the frame.