How does the camera shoot the effect of being close to reality and far from virtual?

To make the background more "fuzzy", the formal point is to make the background more fuzzy or make the depth of field effect more obvious.

For friends who use ordinary small digital cameras, it is difficult to achieve this blurring effect, and more than half of the reasons have little to do with the photographer's technology. Because of the "natural difference" between the photosensitive element area and the imaging area of the lens used, ordinary digital cameras can't compete with cameras with larger photosensitive elements (taking SLR as an example here) from the "birth".

There are three factors that determine the depth of field effect:

First of all, the aperture size

The smaller the aperture value, the greater the actual aperture light, the smaller the depth of field, the smaller the clear range and the more blurred the background outside the subject. Usually, the aperture value of ordinary small digital cameras can reach F2.0~F2.8. Although the effect is not obvious, if you want to obtain obvious depth of field effect, you should try to use the maximum aperture. The larger the aperture value, the smaller the actual light input, the larger the depth of field and the larger the clear range.

If you want to take photos of large scenes, try to use a small aperture like F9~F 1 1 to get a more delicate and sharp image analysis effect.

Note: Do not use the extreme value of the aperture unless it is necessary. Sometimes the maximum aperture is easy to make the image of the highlight edge of the object have purple edges, and the image will be unclear. Too small aperture will also affect the image quality.

Second, the focal length used by the lens.

Nowadays, telephoto cameras in small digital cameras have become very popular. When using optical zoom, the longer the focal length, the more obvious the depth of field effect. Note that "digital zoom" has no effect on the depth of field effect, but simply enlarges the photo locally.

Among SLR users, many enthusiasts often use large aperture telephoto lenses in addition to portrait lenses when shooting models, so they have to stand far away from the models.

Distance: the distance between the subject and background, and the distance between the photographer and the subject.

This should be easy to see in actual shooting. So when taking pictures, try to keep the subject or object away from the background and choose a far background. Note that the flowers and trees beside the main body in Figure 2 are clearer than the scenery in the distant background. If the composition allows, the photographer and the subject can be as close as possible. The degree of background blur changes with the distance from the subject. Author: Zhang Bin [Click to enlarge] These three points are dynamic variables and will affect each other. When all three achieve the effect of "addition", the depth of field effect will be more obvious. On the contrary, as long as one of them is a "subtraction" effect, such as a small aperture, even if a long focal length is used, part of the blur effect brought by the long focal length will be offset by the small aperture.