Does the aperture value of digital camera become larger or smaller?

First understand a concept, the aperture number (f) is inversely proportional to the aperture. That is, the smaller the f value, the larger the aperture. The larger the f value, the smaller the aperture.

Advantages of large aperture:

1. A large aperture can increase the shutter speed, which is more conducive to hand-held shooting when the light is insufficient;

2. When shooting moving objects, the large aperture is beneficial to cooperate with the high-speed shutter to "solidify" the moving objects;

3. One of the most fascinating features of large aperture is that when shooting with large aperture, the subject on the focal plane is clear, while the Jiao Wai is blurred (that is, people often say blur). To put it bluntly, if you want to make the clear place clear and blur the unimportant place, you can use a large aperture, which is conducive to highlighting the subject and is often used to shoot portraits, such as outdoor portrait art photos.

Learn more about aperture:

To understand what an aperture is, we must first understand the relative aperture. The relative aperture is the ratio of the aperture diameter of the lens to the focal length of the lens. If the maximum aperture diameter of a camera lens is 25mm and the focal length is 50mm, then the maximum relative aperture of this camera lens is 1/2. The reciprocal of the relative aperture is called the aperture coefficient (also called F value) of the lens. Then according to this definition, the maximum aperture in the above example is 2.0. Because the aperture number is the reciprocal of the relative aperture, the smaller the aperture number, the stronger the light passing ability of the lens. F value is a particularly important parameter for camera lens. The smaller the f value, the wider the scope of application of the lens.

When people choose lenses, of course, they must first choose products with strong light transmission ability. Because the manufacturing process of large aperture lens requires higher requirements (when the aperture is large, the requirements for reducing the distortion of the edge image field are higher), the larger the maximum aperture, the higher its value under the premise of little distortion difference. For professional lenses, if the F value is between 1.8 and 1.4, the price will often rise by several thousand yuan. Small aperture is relatively easy to realize. The luminous flux can be reduced by adjusting the aperture blade in the lens and reducing the relative aperture, so the minimum aperture is generally not a problem. Therefore, when choosing a digital camera, if a variety of cameras are equally matched in technical indicators, you can give priority to the one with a small F value.