How many colors are there?

There are three kinds of hoods: petal-shaped hoods, long-wind hoods and short hoods. Generally, the hood is only used in the case of side backlight, backlight and light interference, but I personally suggest wearing the hood at any time, which can not only block the light interference but also protect the lens. Introduction of 1 hood. Petal-shaped hood: Petal-shaped hood is to meet the needs of lens viewing angle, so it is shorter on the left and right and longer on the up and down. The petal-shaped hood is to facilitate the formation of four-corner cone light. Petal cover 2. Long hood: The longer the hood, the more it can isolate the interference of surrounding light sources, and the better the halo reduction effect. Therefore, a long hood for a long lens helps to concentrate the light entering the lens. A-shaped cover 3. Short hood: Relatively speaking, short hoods are mostly used for wide-angle lenses, because wide-angle lenses need to absorb more light than long lenses, thus obtaining a wide scene. Short hood is widely used in backlight photography, which can generally avoid glare. However, if the light source is close, glare may still appear. At this time, you can block the hood by hand at the side where the light source is located, and whether to eliminate glare can directly observe the effect in the viewfinder.