Is the camera hood effective?

1. Prevent glare when the side is backlit.

When shooting along the light, the hood is dispensable and does not have much effect, but you should pay attention to it in the backlight or side backlight scene. Without a hood, multiple reflective surfaces will interfere with each other to form a halo, which is easy to make the picture unsaturated or even foggy, or the halo will affect the image quality.

2. Avoid white balance deviation when shooting in low light.

As you know, when shooting at night, the light source is complicated and difficult to control. Without a hood to filter unnecessary light, the lens will be interfered by many different types of light sources, which may cause white balance deviation.

3. Protect the lens from accidental injuries

The hood can not only block unnecessary light, but also protect the camera lens. When there are many people or the environment is bad, installing a hood can effectively avoid accidental contact and damage to the mirror surface, and reduce the damage caused by lens falling.

Extended data:

Precautions:

1. There are many sizes of the hood, so you should choose the one that matches the focal length of the lens. Be sure to confirm the size before buying or bring a camera directly to match!

2. It should also be noted that the shorter the focal length of the lens, the larger the viewing angle and the shorter the hood. If you use the hood of a standard lens on a wide-angle lens, it will inevitably lead to the result that the image around the screen cannot be imaged. On the other hand, it can't play the role of hood. When using a zoom lens, it is best to use a retractable hood.

3. The hood is widely used in backlight photography, generally speaking, it can avoid glare. However, if the light source is close, glare may still appear. At this time, you can cover the range hood with your hand on the side where the light source is located. Whether the glare is eliminated or not should be observed clearly from the viewfinder.

When using the hood, we should consider the factors that it works in harmony with the flash, because sometimes the former often blocks part of the light of the flash.

4. The hood is used to reduce the glare interference of the lens caused by stray light outside the shooting area, so it can only be used on the lens with the front end not rotating when focusing. Generally speaking, the longer the hood, the better the effect of blocking stray light. But if the flat cover is too long, it will block the four corners of the picture.

The petal cover is concave inward at the position corresponding to the four corners of the picture, which can "get out of the way" the light at the four corners of the picture. On the premise of not blocking the four corners of the picture, the petals of the petal cover extend forward by a light shield, which can provide better blocking effect than the round-mouth light shield.

References:

Hood- Baidu encyclopedia