What is a large depth of field?

Question 1: What is the depth of field? Novices may be unfamiliar with the word depth of field, and many people may have never heard of this concept. But if you can understand the concept of depth of field and apply it to your own shooting, you can take more original photos. Then let's see what the depth of field is. Simply put, the depth of field is the range of good focus. It can decide whether to blur the background to highlight the subject or shoot a clear background. In photos of flowers, insects and so on, we can often see the background blurred. However, when taking commemorative photos, group photos, scenery and other photos, the background will generally be as clear as the subject. In the illustration, we can see that the car in the first photo is as clear as the background, which we call the scene depth. In the second photo, only the car is clear and the background is blurred, which we call the depth of field. The easiest way to adjust the depth of field is to change the aperture size. If you make the aperture bigger, the depth of field will be shallower, and vice versa. Of course, the larger the aperture, the faster the shutter speed, the smaller the aperture and the slower the shutter speed. In this way, under the same exposure intensity, photos with different depth of field can be obtained. Aperture is not the only factor that affects the depth of field. Short shooting distance leads to the depth of the scene, long shooting distance leads to the depth of the scene, and short shooting distance leads to the opposite. Therefore, when shooting with a wide-angle lens, it is easy to focus on the whole image, while when shooting with a telephoto lens, attention should be paid because the depth of field is shallow. Similarly, based on the point with good focus, the point near it is deeper than the far point. The most common photos taken using the concept of depth of field are panoramic focus photos and moving focus photos. Shifting focus refers to a shooting method that completely blurs the background to highlight the subject. Often use a large aperture lens and the aperture is fully open for shooting, or use a telephoto lens. The shooting method opposite to shifting focus is called panning focus, which is often used for photos that emphasize the sense of distance. Although it is not easy to apply the depth-of-field shooting technique to acupoints, you still need to practice if you want to improve your shooting level.

The scene on the plane where the focus subject is located will form a clear image on the film, and there is a range from somewhere in front to somewhere behind it, in which all the scenes can form a clear image. This range is called depth of field.

There is a circle of symmetrical aperture scale on the camera lens, which is called Jing Shenbiao. Floating energy indicates the clear distance range before and after the subject. This Jing Shenbiao tells us that when you shoot with a certain aperture value, you can find a set of scales corresponding to the aperture value you use and the corresponding distance range in this symmetrical depth scale, and you can get a clear image of the scene within this distance range. According to Jing Shenbiao, the depth of field varies with the set aperture value: the depth of field is short at large aperture and long at small aperture. The depth of field will also change with the distance of the subject. When the lens focuses on close range, the depth of field is short, and when focusing on distant objects, it is long.

If you need a large depth of field, you should first choose a smaller aperture and use a slower shutter to ensure proper exposure. On the contrary, if you need to highlight the theme with a small depth of field, use a large aperture and be fast. When the object is stationary, the speed can be set slower and a smaller aperture can be selected; When shooting a moving object, in order to avoid image blur, you should choose one with fast speed and large aperture.

Question 2: 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 3: 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 4: 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 5: 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 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: 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 8: When shooting, when using large depth of field, when using small depth of field to shoot clear scenes before and after, such as landscapes, commemorative photos, group photos, etc.

As long as it is a clear subject with a small depth of field, such as flowers and portraits.

Question 9: What is the depth of field A: In principle, there is an allowable circle of dispersion before and after the far focus and the near focus, which is called the depth of field. That is to say, before and after the focus, the image still has a clear range, and the depth of the subject before and after controls the blur degree of the image on the photosensitive element. The distance between aperture, lens and subject is an important factor affecting the depth of field. The larger the aperture, the smaller the depth of field, and the smaller the aperture, the greater the depth of field. The longer the focal length of the lens, the smaller the depth of field, and vice versa. The closer the subject is, the smaller the depth of field is, and the farther the subject is, the greater the depth of field is. In order to highlight the subject, many people will choose a small depth of field. Of course, if you want to shoot the scenery, we would recommend choosing a large depth of field. Question 2

At present, only a few professional models of Canon can use CCD/CMOS for digital cameras to achieve this frame size, and other digital cameras can't meet this requirement whether they are professional or quasi-professional, so many players who are used to using film cameras obviously feel that the depth of field is difficult to come out after choosing digital cameras. In addition, a small program for calculating the depth of field has been circulated on the Internet, in which the focal length plays a great role. Therefore, it is certain that the photosensitive element has a direct relationship with the depth of field, but there are obviously two factors that affect the depth of field. The first is the lens, and the second is the frame.

First of all, if economic conditions permit, try to buy a digital camera with a large CCD/CMOS sensor to make it closer to the traditional 35mm film camera. This is the watershed between professional digital cameras and quasi-professional cameras at present, and it is also fully reflected in price. Although many manufacturers have introduced high-pixel digital cameras one after another, the price has not increased or even decreased, but we found that the size of their photosensitive elements has not increased.

Followed by macro shooting, generally this mode can get a shallow depth of field, but this shallow depth of field is still far from the real shallow depth of field. From a practical point of view, in fact, it can't be completely blurred. Macro shooting is often used for close-range shooting, and it is rarely used at other times. The application of "large aperture+large zoom" is highly praised by many people, but it should be noted that the influence of focusing distance and lens focal length is square, and their influence on depth of field is greater than that of aperture. Therefore, in order to keep the depth of field unchanged, every time the focal length of the lens doubles, the aperture will be reduced by two or three steps.

Related factors of depth of field 1.

The focal length of the lens

The focal length of the lens is different, and the depth of field will be different. A long lens can produce a shorter depth of field effect, and a short lens can produce a longer depth of field effect. 2.

hole

Generally speaking, the larger the aperture, the shorter the depth of field, the smaller the aperture and the longer the depth of field. 3. Distance from the lens to the subject

Question 10: What is a wide-angle lens and a large depth of field? Who can compare a picture to a wide-angle lens? It means that the lens can capture a large angle scene because the focal length of the lens is very short. Simply put, two similar triangles are put together from top to bottom. The small triangle is the camera and the big triangle is the field of view. The bottom of the triangle (the size of the photosensitive element) remains unchanged. The shorter the distance from the base of a triangle to the vertex (the shorter the focal length), the larger the vertex and the larger the visible range of the triangle.

Large depth of field: it is the scenery in the photo. Whether it is viewed from a distance or from a close distance, it looks very clear, and the specific principle is more troublesome to understand, so I won't explain it here. In short, the smaller the aperture (the larger the aperture value), the greater the depth of field; The shorter the focal length, the greater the depth of field. In other words, the fixed depth of field of a wide-angle lens is large.

If you are interested, you can add me and explain it in detail.