What does depth of field mean?

Question 1: What do you mean by small depth of field and large depth of field? How to simply adjust: small depth of field: the scene is clear in a relatively small range before and after focusing. Large depth of field: the scene is clear in a relatively large range before and after focusing. Factors that control the depth of field: aperture, lens focal length and small object distance. Depth of field: large aperture (small value), long focal length and short object distance. Large depth of field: small aperture (large value), short focal length and long object distance.

Question 2: What does the depth of field mean? The smaller the depth of field in the clear range, the higher the ambiguity of Jiao Wai, while the larger the depth of field, the clearer the Jiao Wai.

There are three things that determine the depth of field:

Lens aperture:

The larger the aperture, the smaller the depth of field; The smaller the aperture, the greater the depth of field;

(2), the lens focal length

The longer the focal length of the lens, the smaller the depth of field; The shorter the focal length, the greater the depth of field;

(3), shooting distance

Question 3: SLR camera, small aperture, large depth of field, large aperture and small depth of field, what do you mean? When you press the shutter on the camera, a hole will be opened so that the sensor can capture the light entering the camera. The aperture value you set will affect the opening size of this hole. The bigger the hole, the more light comes in. The smaller the hole, the less light comes in.

Depth of field (DOF) refers to the clear part of a photo before and after the focal plane. Large depth of field means that most photos are clear regardless of distance (for example, photos taken with f/22 aperture have very clear foreground and background). Small (or shallow) depth of field means that only a part of the picture in the photo is clear and the other pictures are blurred.

Graffiti, camera objects have different distances from the aperture and different depth of field.

Question 4: Where are the large depth of field and the small depth of field used respectively? The most essential difference between the two is that the things to be highlighted are different. Large depth of field highlights objects far and near, and small depth of field highlights a certain part of the object.

1, a large depth of field means a large vertical clear range of photos; A small depth of field means a small vertical clear range of the photo.

2. When a small depth of field is needed to highlight something in the picture, or a certain part of something, it is a small depth of field.

3. The scenes from near to far in the picture are very clear, so you need to use a large depth of field.

Question 5: What is a large depth of field and what is it (the following contents will not be pasted)

What is a large depth of field and what is a small depth of field;

1. A large depth of field means a large vertical clear range of photos;

2. A small depth of field means a small vertical clear range of the photo;

How to shoot small depth of field and large depth of field;

1. Shoot a small aperture with a large depth of field;

2. Shoot a small depth of field with a large aperture;

Aperture is closely related to the depth of field of a photo.

(Depth of field-the vertical clear range of the photo. )

1) Aperture is inversely proportional to depth of field.

2) The larger the aperture, the smaller the depth of field, that is, the smaller the clear range.

3) If "F2.8" is a large aperture-the clear range is small, the artistic effect of contrast between reality and reality can be obtained;

4) If "F8" is a medium-sized aperture,

5) If "F22" is a small aperture, the depth of field is large, that is, the clear range is large. This is why small apertures are often used when taking group photos. )

Question 6: Is this sentence correct? What do you mean? . . . So it's right on the whole. But it needs preconditions.

When shooting at close range,

When shooting with a large aperture, the focus is clear, except that it is close to the focus, and it is blurred before and after.

Small aperture shooting, clear focus, not only clear before and after focusing, but also clear at a long distance.

But ... if you focus on infinity, then the situation changes.

The depth of field of a large aperture will also be large and the distance will be equally clear. At this time, the gap between small aperture and large aperture is not obvious.

Therefore, comparability can only be achieved if it is fixed.

Question 7: The difference between large depth of field and small depth of field The main difference between large depth of field and small depth of field: large depth of field: the scenery in a certain range behind the focus is clear and distinguishable, which is mostly used for landscape photography; Small depth of field: the scene behind the focus is blurred and the subject is more prominent, which is mostly used for portraits, close-ups and other photography.

Question 8: What does the depth of the scene mean? Shallow depth of field means that focusing makes the image clear, and the area within a certain distance before and after focusing can be clearly displayed. This range is called depth of field. The longer the depth of field, the larger the range that can be clearly presented. On the contrary, the smaller the depth of field, the more blurred the foreground or background, which is a hazy phenomenon caused by poor focus. From the optical theory, under the focal length of the lens, only the plane at the object distance can be clearly shown, and the scenery outside this plane will be blurred. For the role of shallow depth of field, we also want to briefly say that using shallow depth of field technology to take portrait photos has two functions:

Separate the subject from the background and let the audience focus on the subject.

Blur the complex background into simple color blocks.

Question 9: When to use large depth of field, when to use small depth of field, and why? The shooting of large-scale scenes needs to be clear from far to near, so small aperture and large depth of field.

When shooting portraits and close-ups, it is necessary to highlight the subject, remove irrelevant background, and use large aperture and shallow depth of field to blur the foreground and background.

Question 10: The smaller the depth of field, the larger the aperture and the smaller the depth of field. Conversely, the larger the number, the smaller the aperture and the greater the depth of field. For example, F2.8 compared with 4, the aperture of 2.8 with small number is greater than 4, and the depth of field is less than 4. On the contrary, if it is greater than 4, the aperture is less than 2.8 and the depth of field is greater than 2.8. Clear or not.

The size of the aperture is controlled according to the shooting requirements and effects, rather than being small or large depending on the situation.

It is difficult to answer your question, because in photography, there is no definition of absolute big or small aperture value, except 1.0 and 64. Different photography fields, different photographers, photography habits and commonly used apertures are different, and there is no fixed standard.

PS: 1.0 is the absolute maximum aperture. 64 is the absolute minimum aperture.