Advantages of large aperture lens

Lead: Aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens, usually in the lens. We use the f value to represent the aperture size. The following are the benefits of my collection of large aperture lenses, I hope you will read them carefully!

The main functions of the aperture are:

1) controls the amount of light per unit time.

2) Control the depth of field

The so-called depth of field is the range that can still be clearly seen before and after focusing on a certain point. To put it bluntly, the background blur we usually say is the effect of depth of field.

The relationship between aperture and depth of field;

The larger the aperture, the smaller the depth of field.

The smaller the aperture, the greater the depth of field.

Therefore, a large aperture can increase the amount of light entering the lens, improve the shutter speed, freeze moving objects, or prevent image blurring caused by hand shaking when shooting in a dark environment.

Large aperture can make the depth of field shallow, so that the close-range part of the photo is obviously separated from the distant view.

Large aperture is widely used in portraits, sketches and other shooting occasions. Specifically, a large aperture has the following four advantages:

First, the subject's foreground and background are blurred, highlighting the theme in artistic photography.

Obviously, the blur effect of large aperture obviously highlights the theme. Due to the dark angle, the maximum aperture is usually not used, but the aperture is reduced by one or two steps to obtain better imaging quality.

The second is to improve the shutter speed to meet the requirements of safe shutter and make up for the jitter caused by the slow shutter speed.

In the past, when the sensitivity could not be improved, this kind of lens is called "high-speed lens", which is the best interpretation of this kind of lens; That is, under the condition of low light, the shutter speed is prevented from being too slow, so that high-quality photos can be obtained without greatly improving the sensitivity.

Third, the imaging quality is good.

The fourth is to improve the focusing speed.

Because the aperture is fully open, the amount of light entering is relatively large, and the viewfinder is bright and easy to focus.

These are the benefits that a large aperture brings to photographers. I believe that lovers who love shooting portraits and prospects will be more interested in large apertures.