How to adjust the aperture of the camera?

How to adjust the aperture and shutter of SLR?

How do photographers adjust the aperture and shutter?

Individuals use manual gears more.

1. First, determine which parameters are needed according to the occasion and the desired effect.

For example, if you want to blur the background, you should turn up the aperture.

You need a large depth of field to shoot the scenery, so turn down the aperture.

To shoot motion, you need a higher shutter to fix it.

If you want to express the dynamic effect through blurring, you need a slower shutter.

For hand-held shooting and snapshots in dark environment, try to use a larger aperture (generally, a higher ISO is needed to use the shutter speed as quickly as possible).

If you want to shoot a star-studded effect, use a smaller aperture.

Generally, when using the sub-factory lens, the maximum aperture is not used, but it is reduced by one level.

2. Look at the exposure indicator.

Now all cameras have TTL metering. If some antique film SLR cameras don't have an exposure meter, you need an extra hand-held exposure meter to measure light.

Turn the aperture or shutter dial on the camera and observe the exposure indicator bar on the display screen or shoulder screen to judge whether the exposure parameters are appropriate. When the exposure indicator bar points to the middle position (0), it indicates that the exposure is appropriate.

3. Further correct the exposure according to the color of the photometer.

Because the exposure meter is based on the reflectivity of ash in 18%, the color will also affect the accuracy of the exposure meter. The light reflection is large, and the exposure measured by the exposure meter is small, so the exposure should be increased. On the contrary, black should reduce exposure.

For example, I decided to use an aperture of f/2.8.

Then adjust the shutter speed. When the shutter speed is adjusted to 120s, the light metering indicator bar shows the exposure just right.

The measured object accounts for a large proportion in the picture, and the color is dark, so slow down the shutter speed to 240s (one step lower), which is almost the correct exposure value.

4. Further modify the exposure parameters according to the creative needs.

For example, if you take a photo with a small fresh style, you need to adjust the parameters to be slightly exposed.

For example, when taking a silhouette, it is sometimes necessary to deliberately dim the exposure to make the photo slightly underexposed.

In a word, it's quite complicated to say, but it's not that difficult to operate in practice.

Practice more and try more, and you will soon master the basic skills of manual exposure.

How to set the aperture and shutter of SLR camera?

Hello! Photography is an aesthetic art, and we need to try more in shooting methods and effects. If you have the instruction manual of this model at hand, it will be greatly improved to read it several times. Learn from each other in the following points, hoping to help you.

First of all, the sensitivity ISO:

In traditional film cameras, ISO stands for the standard of photosensitive speed; In digital cameras, the definition of ISO is the same as that of film, representing the photosensitive speed of CCD or CMOS photosensitive elements. The higher the ISO value, the stronger the photosensitivity of photosensitive materials. The calculation formula of ISO is S=0.8/H(S sensitivity, h is exposure). As can be seen from the formula, the higher the sensitivity, the lower the requirements for exposure. The exposure speed of ISO200 film is twice that of ISO 100. That is to say, under the same conditions, the exposure time of ISO200 film is half that of ISO 100 film. In digital cameras, the number of light sources and the value of picture brightness can be changed by adjusting the equivalent sensitivity. Therefore, the sensitivity has also become a value that indirectly controls the brightness of the picture.

In the traditional 135 film camera, the equivalent photosensitive value is a measure of the sensitivity of the camera film to light, which is usually expressed by ISO number. The larger the number, the stronger the optical rotation. Commonly used expressions are ISO 100, 400, 1000, etc. Generally speaking, the higher the sensitivity, the thicker the film particles and the worse the magnification effect.

The traditional camera itself has no sensitivity, because sensitivity is only a quantitative sign of the sensitivity of photosensitive materials to radiation energy under certain exposure, development and testing conditions. Anyone who has used a traditional camera knows that the most important index of film is sensitivity-in layman's terms, it is to measure how much light is needed to complete accurate exposure of film. We bought100,200,400 films in the camera shop, and the numbers represent the sensitivity. Sensitivity is generally expressed by ISO value. With the increase of this value, the sensitivity of the film to light increases, so that it can be shot in different light. Movies like ISO 100 are most suitable for outdoor shooting on sunny days, while ISO400 movies can be shot indoors or in places with poor light, such as early morning and dusk.

However, because the camera is different from ordinary cameras, its photosensitive device adopts CCD or CMOS, so there are corresponding requirements for exposure, and there are also problems of high and low photosensitive sensitivity. This is equivalent to a certain sensitivity of the film. In order to facilitate the understanding of digital camera users, digital camera manufacturers generally convert the sensitivity of digital camera CCD (or light sensitivity) into the sensitivity of traditional film, so digital cameras have the saying of "considerable sensitivity".

From the point of view of measuring film sensitivity, at present, the sensitivity of digital cameras is distributed in the middle and high speed range, the lowest is ISO50, the highest is ISO6400, and most of them are around ISO 100. For some digital cameras, the sensitivity is single, and the sensitivity tolerance of CCD is very small, which limits their use effect in the case of too strong or too weak light. Other digital cameras have a certain sensitivity range, but even within the allowable range, the shooting effect is different if the sensitivity is set high or low, so we should put the best sensitivity in normal shooting. Like traditional cameras, low ISO values are suitable for creating clear and soft pictures, while high ISO values can compensate for poor lighting environment.

When the light is insufficient, the use of flash is inevitable. However, in some cases, such as exhibition halls or performances, if it is not allowed or convenient to use flash, the brightness of photos can be increased by ISO value. Because of the adjustability of ISO value of digital camera, sometimes we can only reduce the use times of flash by increasing ISO value and increasing exposure compensation. Increasing the ISO value can increase the brightness, but it may also increase the noise of the photo.

Second, the aperture:

The English name of Aperture is aperture. Aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens. Usually in the camera. Aperture values F2.8, F8 and F 16 are the "coefficients" of the aperture, and they are relative apertures, not the physical aperture of the aperture, nor the physical hole of the aperture. ......

How to adjust the aperture and shutter speed of Canon 550d SLR camera?

It depends on which mode you are in. If the turntable on the right shoulder of the fuselage is in the M position, then turning the dial wheel is to adjust the shutter, and pressing the exposure compensation key to turn the dial wheel is to adjust the aperture; In Av file, only the aperture can be adjusted by turning the thumbwheel, and the shutter will change with the change of ambient light. In Tv gear, the aperture can only be adjusted by turning the thumbwheel, and the aperture changes with the change of ambient light.

How to set the aperture and shutter for SLR photography? 20 points

When shooting Gong, if what you are looking for is a clean picture with a prominent subject (character), shooting with a lens with a large aperture and a long focal length will get ideal results. As far as the body and lens you have now are concerned, using the aperture at the 55MM end of the lens to 5.6 is the best blur effect.

Of course, taking a portrait should not only blur the background, but also grasp your own feelings if you want to take a good portrait. Look at the good films taken by experts, and you will understand how to take good portraits. Sometimes the background needs to be blurred, and sometimes it needs to be clear before and after, depending on the subject you want to shoot.

The scenery is the same. In many cases, it is necessary to be clear before and after, so try to use a small aperture, such as the aperture setting of F8.0~F22. The choice of focal length mainly depends on the scenery you take. Of course, sometimes you need to take some sketches, so you need to turn on the aperture to blur the background.

In fact, the setting of aperture and shutter can't be explained clearly in one or two sentences. This is a book.

Since you are a novice, you can buy some books on the basic knowledge of cameras and read them first to understand what aperture is and what shutter is, and then you can know what combination to use in what occasion. It is recommended that you take photos with files (aperture first), that is, manually set the aperture and let the camera automatically set the shutter according to the metering results.

How to adjust the shutter and aperture of SLR camera?

Different brands of cameras have different operating methods. For example, Nikon digital camera can adjust the aperture value by turning the main command dial in manual M mode, and the shutter value can be adjusted by turning the auxiliary command dial. If any two values of aperture and shutter are regarded as a group, a series of values of aperture and shutter can form multiple exposure combinations, and one exposure combination determines one exposure. Usually, the choice of a set of aperture and shutter values depends on your photography intention in addition to choosing the correct exposure.

How to adjust the aperture and shutter for M-file shooting of SLR camera

Do you want to ask how to adjust the exposure parameters? . . .

Introduce several simple methods:

Method 1: Measure the EV value with an exposure meter, and then set the aperture, shutter and ISO combination according to this value. But I guess you don't want to buy an exposure meter, so look down.

Method 2: Use the camera's own metering system, and the reference standard is exposure compensation of M file. Adjust the combination of aperture, shutter and ISO to make the exposure compensation close to 0. At this time, please note that because the camera is a reflective metering system, there may be inaccurate metering (such as snow scene, backlight, etc.). ), and you need to interpret photometry according to your own experience, so it may not really be 0 after you have experience, but it may be +0.3 or -0.7, or even +2 and so on. You have to understand slowly, and I can't explain it clearly. But the overall idea is correct: the camera comes with an exposure meter, and the machine shows you the exposure that the machine thinks is appropriate in the form of a value of 0.

Method 3: Take a photo in automatic (or M-file) mode, remember the combination of aperture, shutter and ISO when shooting, then play back the photo just taken, and look at the histogram to explain whether the photo is overexposed or underexposed through histogram and personal experience. On this basis, adjust the combination of aperture, shutter and ISO to take another picture, and then check the histogram repeatedly until it is suitable.

In addition, whether the exposure is accurate is only the basis, and then you should pay attention to whether the photos express what you want to express. Sometimes the exposure you want to express is not really accurate, but it is the correct exposure.

How to adjust the aperture and shutter speed?

If we know a little about the buttons on the camera body, we have also seen the simple usage of various symbols on the camera screen. With these basic understandings, this paper takes you step by step to operate the camera from the two most important and basic modes of "shutter priority" and "aperture priority". The purpose is to make you more familiar with your CanonDSLR camera through the camera operation steps and instructions.

Television shutter priority

The TV shutter priority mode is the most important and the first mode for beginners to learn monocular photography. At this point, turn the camera and aim the TV at the white mark next to it. At this point, the camera will switch to the TV shutter priority mode.

In order to adjust the shutter speed, we must turn a wheel next to the camera shutter release button and turn it left and right to adjust the shutter speed.

When we turn the wheel with the index finger of our right hand, we will pay attention to the camera information screen and find out the field of shutter speed to see if the shutter speed has changed when we turn the wheel. As shown in the above figure, we can see that the shutter speed is 1/200s at this time. You can try to practice by turning the shutter.

After adjusting the shutter value, you can try to practice taking a few pictures instead of finding some moving objects as exercises, such as pedestrians, cars and running children. First of all, you should find a slow-moving subject to practice, and then find a big-moving exercise.

Take photos through the optical observation window (OVF), move the wheel with your finger to adjust the shutter speed, and pay attention to the following photo information. It shows that the current shutter speed has been set to 1/320. You have to look at each photo to know that the shutter speed can't reach the target.

How to interpret the shutter speed? You can refer to the above picture. If you want to increase the shutter speed, the number on the right should be larger, so that the protagonist in the fast action can be caught and frozen. On the other hand, if you want to present the rhythm of the protagonist, you should slow down the shutter (for example, 1/60) and adjust it gradually as needed.

Remember, when practicing shutter priority, the easiest way is to practice repeatedly at different shutter speeds. Every time you press the shutter, listen to the sound of the shutter with your ears and check the photos you just took. If you feel that it doesn't meet your expectations, such as the blur of the protagonist, then dial the turntable to adjust the shutter and practice it several times repeatedly, so that you will be more skilled in operating the camera and shutter.

Av aperture priority

Turn the shooting mode dial on the camera body to Av and aim at the white sign next to it, that is, start the AV aperture priority shooting mode. This mode allows us to freely adjust the aperture size, while the rest, such as brightness and ISO, are handled by the camera for us.

Similarly, you can adjust the aperture value by pulling the wheel next to the shutter key and turning it left and right.

At this time, move the wheel with your index finger and pay attention to the F value on the camera information panel, as shown in Figure F3.5 above, which is the aperture value at that time. As the wheel rotates, this aperture value will change constantly.

Aperture size not only affects the difference of incoming light, but also affects the depth of field. It is recommended to shoot still life. Through the different aperture sizes of large aperture (such as F 1.8) and small aperture (such as F8.0), feel the application of aperture size in shooting creativity.

When using the optical observation window (OVF) to take a picture and compose a picture, there is a line of photo information below, and the yellow number F2.8 is the aperture value at that time. Through this optical observation window, you don't need to look at the camera LCD information panel, and all kinds of information needed for taking pictures are clear here.

Finally, to help you review, the aperture value is inversely proportional to the actual aperture size. The larger the aperture value f, the smaller the aperture. When we say "you need to turn up the aperture, your aperture is not big enough", we mean the aperture size of the real lens, not the F value. Don't make mistakes here.

Beginners practice aperture priority mode. I would recommend a fixed-focus lens with a large aperture lens (such as CanonEF50mmF 1.8II). The effect is obvious and simple. You will be more familiar with the use of aperture in taking pictures and the operation of the camera.

How to adjust the aperture and shutter speed of Canon digital camera?

Only manual or semi-manual cameras can adjust the aperture and shutter. IXUS75 is a fully automatic camera. The camera can only set the shutter to a slow shutter, and the rest of the shutter and aperture are automatically set by the camera, so you can't adjust them.

You can view the aperture and shutter values in the photo by pressing the DISP key. Press display once, then press detailed display again, and you will see the displayed aperture and shutter value. Press it again and the display will close.

Which one should be adjusted first for general SLR shooting? First shutter, aperture, ISO? 10 point

Before shooting, determine whether the shooting gear is aperture priority, shutter priority or M gear.

Then adjust the focal length, composition!

The next step is to adjust these parameters. These parameters should be considered comprehensively.

How to adjust the shutter and aperture value after SLR m-file metering?

I seem to understand what you want to ask. Let me put your question in my understanding: "You want to use the EV value to determine the exposure parameters, but you find that the EV changes when the camera moves a little. You are confused and don't know which one is right"?

If I understand correctly, the answer is as follows:

1 first of all, you should have a general understanding of the camera's metering system. First, the photometric system will delimit an area, then treat the light in this area as neutral gray, and then get the EV value. So how big is this area? Can be set, spot metering, central focus metering, evaluation metering, and their areas increase in turn.

2. When you know the metering system of the camera, you will know that the camera is a machine after all. It has no brain and can't judge. So you need to explain the EV value it gives and determine the EV value according to your needs. This process requires experience. You have to learn slowly, not in a hurry.

Let me give you an example. For example, in a relatively bright environment, there is a particularly dark object. If you aim this camera at a black object, the camera will think that the black object is neutral gray (that is, not so black). Therefore, in order to turn black objects into neutral gray, the camera can only increase the exposure (the shutter slows down and the aperture becomes larger). At this time, you will see that the EV value will be particularly low, so the photos taken are: all bright environments are overexposed. The above is the metering of the camera. You have to explain the EV value according to your needs. If you just want to overexpose the environment and make the black object turn gray, you can set the parameters according to the EV value given by the camera. On the contrary, you should increase the exposure on the basis of the above EV value, or choose to evaluate photometry from scratch, and so on. What I want to say is that the camera is dead, people are alive, and the parameters fed back by the camera are just references, not standards.

3. If you know the metering system of the camera, how to determine the really needed EV value? I'll give you two methods: the first one is stupid: range exposure, which is very simple. With this function, I won't say much. I don't know how to ask Baidu; The second type: when you look at the neutral gray in the picture, how do you look for neutral gray? It can be your own gray card, or you can look for it from the environment, such as hands, bark, gray walls that are not garbage, etc. The latter requires experience; The third type: you measure the light of the highlights (that is, the bright places) and shadows (that is, the darkest places) of the picture respectively, and then calculate the average value yourself, and use this average value to set the exposure parameters. At this time, you should pay attention to that if the difference between the maximum and minimum EV values is too large, which exceeds the dynamic range of the camera (what is dynamic range? Please look it up in a book), then you can only discard one end (highlights or shadows).

Said a lot, just an overview, or a reading list, please read more books and practice more.

How to adjust the aperture of Canon SLR?

1. First, prepare the camera to be adjusted, as shown in the figure below.

2. Then turn the mode knob to the aperture priority position, as shown in the figure below.

3. Then you can adjust the special size of the aperture by turning the gear circled in the figure below left and right, as shown in the figure below.

4. The place circled in the figure below is the numerical size of the aperture. The maximum or minimum value of the aperture varies with different lenses, as shown in the following figure.

5. Next, you can adjust the aperture value to the position of 5, and take a photo with this value first, as shown in the figure below.

6. Then look at the effect of this numerical shooting, and you will find that the background behind is blurred, as shown in the following figure.

7. Then adjust the aperture value to 13 before shooting, as shown below.

8. Finally, take a look at the effect of the adjusted shooting. This time it was very clear, so the aperture was adjusted, as shown below.

Extended data:

First of all, the aperture size

The smaller the values behind 1 and f, the larger the aperture, the more light entering, the brighter the picture, the narrower the focal plane and the more blurred the background of the subject.

2. The larger the value behind f, the smaller the aperture, the less light entering, the darker the picture, the wider the focal plane, and the clearer the front and back of the subject.

Second, the role of the aperture

1, which can adjust the amount of light entering the lens. For example, domestic kittens always shrink their pupils into a line during the day, and automatically Zhang Kaicheng a round hole at night. So in the same way, when taking pictures, the aperture should be narrowed when the light is strong, and the aperture should be opened when the light is dark. That is to say, the smaller the F value (other parameters remain unchanged), the more favorable it is for shooting at night.

2. Aperture is the most important factor to determine the depth of field, including small aperture (large aperture value), depth of field, large aperture (small aperture value) and depth of field. For example, nearsighted friends, if they don't wear glasses, always habitually squint at things, so they can often see things clearly. Applying photographic terminology, this is called: narrowing the aperture (pupil) and increasing the depth of field.

What are the three ways to adjust the aperture of camera lens?

There are two ways to adjust the aperture of camera lens: automatic adjustment and manual adjustment. According to different subjects, reasonable adjustment methods can achieve the best results.

Make photos brighter: Aperture can also control the amount of light entering the camera. A larger aperture can make a photo brighter, so if you feel that the light is insufficient when taking a photo, turn up the aperture (each lens has a maximum aperture value).

Make photos clearer: A large aperture makes photos more artistic, and a small aperture makes photos clearer, which is common in group photos and commercial products.

Extended data

Aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens. Generally, in the lens, we use the f value to represent the aperture size. It is the scale value corresponding to the aperture value, which is formulated for the convenience of calculating the exposure value in actual photography and represents the light passing ability of the lens.

Because the aperture value changes in multiples of 2, if the aperture value is directly used to represent the luminous flux of the lens, it will be difficult to calculate the exposure value in actual photography. ApertureValue is usually AV (abbreviation of "aperture value"). According to the square relationship between the area and radius of a circle, it can be known that the aperture diameter should be equal to about 1.4, and the coefficient relationship is increasing.

How to adjust the aperture?

hole

-

The size of the aperture is a parameter that controls the light of the camera lens. To put it bluntly, the size of the aperture will determine the strength of light passing through the lens. So you can easily imagine that the larger the aperture, the stronger and weaker the light projected onto the CCD photoreceptor of the digital camera through the lens. Then its size will directly affect the imaging quality of the digital photos we take. For example, when the shutter time is the same, the larger the aperture, the brighter the photo. If the aperture is too large, there will be overexposure. No matter for traditional cameras or digital cameras, the aperture is represented by the letter "F", and the aperture in the center of the aperture is represented by the corresponding value, that is, the "F+ value". It is worth noting that the smaller the aperture value, the larger the aperture, and the more light entering, and vice versa. So "increasing the aperture" usually refers to narrowing the aperture and increasing the aperture. For example, from f5.6 to f4, or a higher level of f2.8.

shutter

-

Shutter speed is also a parameter to control exposure time when taking pictures. In order to make it easier for everyone to understand, we can also say that the shutter is the control time for the camera to keep the currently set aperture size. For the expression of shutter speed, it is also set with corresponding numbers, such as1/4s,1/60s, etc. They represent the time to keep the currently set aperture size at 1/30 seconds and 1/60 seconds respectively. Therefore, it is not difficult to see that using different shutter parameters to maintain the aperture length of the unit aperture can also control the amount of light entering during shooting, that is, exposure. The above-mentioned 1/30 seconds is twice as long as 1/60 seconds, and at this time, the amount of light passing through the aperture of the unit aperture is twice as high, so conversely,115 seconds is half as long, and the amount of light passing through the aperture of the unit aperture will be reduced by half. In actual shooting, we can achieve different effects by adjusting the shutter speed, such as seemingly flowing "car river" or solidified water droplets, using slow shutter and high (fast) shutter respectively.

-

Aperture is a mechanical device that can change the size of the middle hole of the camera lens, and shutter is a device (mechanical or electronic) that controls the exposure time. The combination of the two controls the exposure.

For example, light is like water, and the lens is equivalent to a hole with a sluice, which can control the direction and flow direction of water. The aperture is the size of the hole, and the shutter is the time to open the gate.

When the opening time is fixed, the smaller the hole, the less water will flow in, and vice versa. When the shutter speed is fixed, the aperture is appropriate (e.g. f5.6), the exposure is normal, the aperture is too large (e.g. f2.8), the photo (developed positive film, not negative film) is shiny, without layering, or even a blank sheet of paper; The aperture is too small (such as f 1 1), the exposure is insufficient, the photo is dark, the shimmer is lost or even there is no image.

When the hole size is fixed, the longer the opening time, the more water will flow in, and vice versa. So when the aperture is fixed, the shutter speed is appropriate (such as 1/250 seconds), the exposure is normal, the shutter is full (such as 1/60 seconds), the exposure time is long, the shutter speed is fast (such as11000 seconds), and the exposure is insufficient.

It should be noted that although both aperture and shutter can control exposure, their functions are not equal. The smaller the aperture, the more concentrated the light will be, and it will be easier to image clearly when it reaches the film (or CCD). (Of course, diffraction will occur if the aperture is too small, but it will be blurred. The greater the depth of field, the smaller it will be. Therefore, when the depth of field needs to be accurately controlled, the aperture size can be determined first, and then the shutter speed can be determined. When shooting a moving object, if the shutter is opened for too long, the moving object will be imaged in different parts of the negative (or CCD), and the photos taken will definitely be unclear. On the contrary, when the shutter speed is high, the imaging of the moving object on the film has not moved obviously, and the exposure process has been completed, and the photo will be clear, that is, the moving object is solidified on the screen. So when shooting a moving object, you can choose the shutter speed as fast as possible, and then adjust the aperture, which is correct. Of course, if you want the moving body to leave a trajectory in the photo and enhance the sense of movement, you can choose a slower shutter speed.

Especially important is flash photography. Choosing the appropriate shutter and aperture can control the light ratio between flash and other light. Because the flash time of the electronic flash that is widely used now is very short, only about one ten thousandth of a second, it is useless to extend the exposure time after the shutter speed is synchronized with it (the so-called synchronization means that the flash time falls within the time period after the shutter is fully opened and before it is closed, otherwise the flash is meaningless when the shutter is not fully opened or closed, or even after a part of the negative film fails to be exposed). So the effect of flash depends on the aperture, and the effect of continuous ambient light (such as other lights in the night scene) depends on the shutter. Proper selection of exposure combination can create perfect artistic effect.