What are the functions of filters and hoods?

The hood is a common photographic accessory covering the camera lens, which is made of metal, hard plastic and soft rubber. She has the following functions:

(1) When shooting with backlight, side light or flash, it can prevent non-imaging light from entering and avoid fogging.

(2) When taking photos with forward light and side light, it can prevent the surrounding scattered light from entering the lens.

(3) In lighting photography or night photography, it can prevent the surrounding interference light from entering the lens.

(4) The lens can be prevented from accidental damage, fingers can be prevented from touching the surface of the lens by mistake, and the lens can be shielded from wind, sand, rain and snow to a certain extent.

There are many sizes of the hood, which should match the focal length of the lens. 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 its due role in shading. When using a zoom lens, it is best to use a retractable hood.

Backlight photography widely uses a hood, which can generally 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.

Functions of the filter:

Various filters have different functions. Details are not posted, please see the following website.

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