1、Improve image clarity and color reproduction. 2、Prevent the entry of needless light, make sure no mist while using backlit, sidelight or flash photography. 3、Prevent the entry of surrounding scattered light into the lens under front lighting and side light photography. 4、Prevent the entry of surrounding interference light into the lens under light photography or night photography. 5、Avoid accidental damage to the lens, it can also avoid fingers accidentally touch the surface of the lens, and to some extent, it can block wind, rain, snow and so on. Features: Improve image clarity and color reproduction. Prevent the entry of needless light, make sure no mist while using backlit, sidelight or flash photography. Prevent the entry of surrounding scattered light into the lens under front lighting and side light photography. Prevent the entry of surrounding interference light into the lens under light photography or night photography. Avoid accidental damage to the lens, it can also avoid fingers accidentally touch the surface of the lens, and to some extent, it can block wind, rain, snow and so on. Specifications: Item: Lens Hood Applications: image clarity improvement, lens protection Weight: Approx 41.4g/1.5oz Product size: Approx 9.5*9.5*4.3cm/3.7*3.7*1.7inch Package size: Approx 15*11.5*1.8cm/5.9*4.5*0.7inch Package list: 1 * 72mm Lens Hood 1 * 37mm to 72mm 1 * 37mm Gasket