The lens hood is a common photographic accessory set in front of the camera lens. It has the following functions:
1. It can prevent the entry of non-imaging light and avoid fog when shooting in backlight, side light or flash photography.
2. It can avoid the surrounding scattered light from entering the lens when taking photos with forward light and side light.
3. In lighting photography or night photography, it can prevent the surrounding interference light from entering the lens.
4. It can prevent accidental damage to the lens, and it can also prevent fingers from touching the surface of the lens by mistake. It can also shield the lens from wind, sand, rain and snow to some extent.
Lens hoods are widely used in backlight photography, generally speaking, to avoid glare. However, if the light source is close, glare may still occur. At this time, you can use your hand to block the hood on the side where the light source is located. Whether the glare is eliminated, you must observe it clearly in the viewfinder.
Lens hoods are widely used in backlight photography, generally speaking, to avoid glare. However, if the light source is close, glare may still occur. At this time, you can use your hand to block the hood on the side where the light source is located. Whether the glare is eliminated, you can directly observe the effect in the viewfinder. In addition to the optical quality of the lens itself, the role of the hood is very obvious. The color, sharpness and contrast of the picture without the hood are not ideal, and the picture with the hood has good performance in several aspects. With a small hood, the effect is quite different.
There are many sizes of hoods, the one that matches the focal length of the lens should be selected. The shorter the focal length of the lens, the larger the angle of view and the shorter the hood. If the hood of a standard lens is used on a wide-angle lens, it will inevitably produce the result that the image can not be imaged around the screen. On the contrary, it cannot play the role of the hood. When using a zoom lens, it is best to use a freely retractable lens hood