How to shoot the depth of field with SLR?

Question 1: How to get 20-point depth of field when shooting video with SLR? You should say shallow depth of field, only the subject is clear. When the background is very blurred, you can blur the background by opening the aperture and getting as close as possible to the subject or object. The larger the aperture, the more blurred the background. These are actually shooting methods. Finally, we should serve the story content.

If the teacher arranges it as a movie, the suggestion is more focused on the story content, often the overall framework structure.

There are many short stories of less than 1000 words in Reader and Youth Digest, which can be read.

I wish you success first.

Question 2: How does a SLR camera get a large depth of field?

But the light is very dark and the aperture is very small.

If the focal length of the lens is 80 mm in Sichuan, just adjust it to infinity, and use a small aperture+hyperfocal distance, without focusing at all.

Question 3: Where is the aperture and depth of field of SLR adjusted? First of all, you should read more instructions. If shooting with AV files, just dial the wheel at the top right to adjust the aperture. If shooting in M range, directly dial the wheel to adjust the shutter speed, press and hold the key below * and then dial the wheel to adjust the aperture. No camera has the function of adjusting depth of field, only depth of field prediction. The larger the aperture, the longer the focal length and the smaller the depth of field. On the contrary, the bigger.

Question 4: What does the depth of field of Canon 550d SLR camera mean? How to adjust the depth of field? The depth of field refers to the distance range that an object measured along the axis of the imaging depth of field machine can obtain a clear image in front of the camera lens or other imagers. After focusing, a clear image can be formed in the range before and after focusing, which is called the depth of field. There is a certain length of space in front of the lens (before and after focal length adjustment). When the subject is in this space, its imaging on the negative is just between the two diffusion circles before and after focusing. The length of the space where the subject is located is called the depth of field. In other words, the blur of the subject image presented on the negative plane of this space is within the limit of the allowable circle of dispersion, and the length of this space is the depth of field.

What is depth of field? What does depth of field mean?

Simply put, the depth of field is the "acceptable clear area" before and after focusing on a clear focus. The characteristic of this distance is that the clear distance behind the real focus is longer than the clear distance in front. For any aperture, the depth of field behind the focus is about twice that before the focus. We generally call it depth of field (or short depth of field) if the clear distance before and after is short; Moreover, the range of clarity is large, which is generally called deep scene (or long depth of field).

The depth of the scene helps to blur the background.

The difference between clear distances is based on several criteria. The concept of "minimum dispersion circle" must be discussed when explaining the depth of field in textbooks, but it is an unnecessary and complicated technical problem for practical application. For example, if you focus on the eyes of the tiger in the zoo, its eyes are the clearest on the negative. At this time, the tiger's mouth and the bark behind it also showed an acceptable and clear image in the final photo. When your eyes are away from the focus, the degree of blur gradually increases. The farther objects in the near foreground and the far background are from the tiger, the worse the definition is.

Relationship between the size of diffusion circle and depth of field

Therefore, "clarity" is not an absolute concept, so the scenery within a certain distance before and after focusing can be clear. The sum of the front and back ranges is called the depth of field, which means that as long as the scenery in this range can be clearly photographed.

Law of depth of field 1: The larger the aperture, the smaller the depth of field.

Aperture Aperture is the basic factor that affects the depth of field, and it is also the only method that can change the depth of field without changing the shooting position and perspective angle (as shown in the following figure), such as f 16 or f22 aperture, to produce a wide range of clear focus. On the contrary, f2.8 or f4 produces a shorter depth of field, and the acceptable clear range on the foreground and background is much smaller. But this method is only applicable to digital SLR cameras and consumer digital cameras with aperture priority AE function.

Relationship between aperture and depth of field

To create a work instead of simply taking a photo, the choice of aperture is a basic element. Even when using the program exposure mode, if possible, you should choose the most suitable combination of aperture and speed.

Rule 2 of depth of field: The greater the focal length, the smaller the depth of field.

This is the most convenient way to get shallow depth of field effect.

Rule 3 of depth of field: The closer the distance, the smaller the depth of field.

This is the best way to shoot small objects such as flowers. Shooting at close range with the widest angle is one of the advantages of digital cameras. For many home users who own consumer digital cameras, reasonable use of this rule can make you more handy when shooting.

Based on the above analysis, the effect of minimum depth of field can be obtained by adopting "maximum aperture+shortest distance as possible+long focal length lens". The maximum depth of field effect can be obtained by using "minimum aperture+shortest focal length lens+hyperfocal distance focusing". At present, the depth of field of general household digital cameras is large, so it is difficult to take pictures with blurred background. Only by macro shooting can we see the effect of blurred background.

Question 5: The depth of field effect of SLR is related to aperture and focal length. The larger the aperture, the longer the focal length. Generally speaking, the shallower the depth of field, the more blurred the background. The smaller the aperture, the shorter the focal length and the greater the depth of field.

For example, the large aperture of F2, the focal length of 135, the blur ability is definitely greater than the 50 focal length of the same F2 aperture.

With the same focal length of 50, the aperture of F2 is definitely greater than the blur ability of F8.

With regard to distance, generally, a lens has a shooting distance. For example, for a lens with a focal length of 135, the recent shooting distance is 1.5m, and infinity is 15m, so the blur ability is definitely the greatest when 1.5m is equivalent to infinity.

Question 6: How to adjust the depth of field of SLR! The depth of field of digital SLR need not be adjusted, because it can be observed directly. There are two factors that affect the depth of field: aperture and lens focal length.

Theoretically, the depth of field is a clear range. The larger the aperture, the smaller the depth of field (shallow bones, smaller the aperture and larger the depth of field). The longer the lens, the smaller the depth of field, the shorter the lens (small focal length) and the longer the depth of field.

When adjusting, try to use the maximum aperture and the longest lens on the existing lens to take photos with relatively small depth of field.

Question 7: [Help] How does the SLR capture the depth of field effect? Learn more about 60D parameter setting. High pay, just ask for expert advice! This problem is technically called depth of field problem. The effect you are talking about is called small depth of field.

The so-called depth of field is the range that can still be clearly seen before and after the focal length is aimed at a certain point. It can decide whether to blur the background to highlight the subject or shoot a clear background. We can often see the blurred background (called small depth of field) in photos of flowers, insects and so on. However, when taking commemorative photos, group photos, scenery and other photos, the background is generally as clear as the subject (called large depth of field).

Aperture, the distance between the lens and the subject are important factors affecting the depth of field;

1, the larger the aperture, the smaller the depth of field, and the smaller the aperture, the greater the depth of field.

2. The longer the focal length of the lens, the smaller the depth of field; Conversely, the greater the depth of field.

3. 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.

Therefore, the shooting method of small depth of field is to use the telephoto end, use the maximum aperture and shoot as close as possible to the subject. At the same time, it must be noted that the subject should be far away from the background.

So it can be said that not all cameras can shoot the effect of small depth of field. A camera that can shoot a small depth of field should have a long focal length (telephoto is not needed, and generally the equivalent focal length 140mm is appropriate) and have the function of manually adjusting the aperture (and the aperture of the camera itself should not be too small). This is not just a SLR camera (even a SLR, if the lens is too short, you can't shoot a small depth of field).

Models that can manually adjust the aperture must have the first gear or the M gear. It is more convenient to use gear. Turn the mode dial to position A, and the F value on the display screen can be selected at will (press the left key of the direction key, and when the F value is adjusted to the minimum value, it is the maximum aperture on the focal segment). When (1) and 200/2.8 are focused at 5m, the depth of field of f/2.8 is δ = 0.035mm f = 200mm f = 2.8l = 5000mm δ l1= 60mm δ L2 = 62mm δ l =122mm Conclusion: This.

Question 8: How to control the depth of field of SLR cameras mainly depends on the interchangeable lens: By adjusting the aperture of the lens, the depth of field can be adjusted freely, and the aperture of some lenses can reach f 1.2 or 1.0, which can achieve amazing blurring effect; A small enough aperture is also beneficial, and a clear image can be taken from far to near. The lens of ordinary digital cameras cannot be replaced, and the aperture is often not adjustable or the adjustment range is limited. A telephoto lens has a shallow depth of field. With the proper aperture, all interference except the main body can be eliminated and good results can be achieved. Ordinary models do not have high-quality telephoto lenses. The lens with large aperture has a large amount of light, so it can shoot at any distance, which affects the depth of field (the depth of field is related to the shooting distance); And you can use more exposure combinations, that is, more apertures are available. Ordinary digital machines have limited aperture, small luminous flux and limited exposure combination. SLR macro shooting can create a very shallow depth of field. The macro function of ordinary digital machine is not complete. More importantly, many depth of field control functions of SLR can be completed by manual operation. On the one hand, it can make up for the lack of automatic function and give full play to personal creativity. Ordinary models often do not have enough manual adjustment function.

Question 9: How to take a photo without depth of field effect with a SLR is not accurate. I guess you mean the effect of large depth of field, that is, the kind where the background is empty.

One is a small aperture, such as F 1 1-F22. Second, don't use a long focal length. The focal length of the national sea is above 300. Although the aperture is small, the depth of field is shallow. The factors that determine the depth of field are: aperture, focal length and background distance.

Question 10: How can I take photos with small depth of field, such as how much aperture is adjusted? 1. Set the lens of the camera to the telephoto end.

2. Adjust the aperture value of the lens to the minimum value of the digital camera (for example, 2.8).

(The relationship between depth of field and aperture is reciprocal. The greater the aperture value, the smaller the depth of field, and the smaller the aperture value, the greater the depth of field. )

For example, if the aperture value of the camera is 2.8/3.2/5.6/8/11/6.

Then adjust the aperture value to the minimum: 2.8.