What are the three elements of camera sensitivity?

Three factors are determined when taking pictures. Decide that first.

Three factors are determined when taking pictures. Decide that first.

When taking pictures, we need to know some tips, whether taking pictures with a mobile phone or a camera. Such tips can help us get started quickly. Let's share with you three elements when taking pictures.

When taking pictures, three factors are decided, first decide that 1.

That is, aperture, shutter and exposure (ISO), these three are the most basic elements that determine the brightness of our photos, that is, exposure.

From the beginning, the first is the aperture.

What is an aperture? I believe everyone has seen the picture below or something similar.

Yes, this is the light circle. There is a difference between a large aperture and a small aperture. Just look at the picture.

So how does the aperture size affect the photo? When you look at the picture, you can find that there is more light in the big aperture and less light in the small aperture.

In other words, if you increase the aperture, the photo will be brighter; When the aperture is reduced, the photo will be darkened.

However, the aperture is not only as simple as bright and dark, but also the favorite of my sister-that is blurring!

The bigger the aperture, the better the blur, so remember to buy a large aperture lens when you want to ask a girl out, hehehehehe.

Tip: the aperture is represented by F. The smaller the F value, the larger the aperture. For example, the aperture of F 1.8 is larger than that of F2.8, which is smaller than the former.

Second, let's talk about the shutter speed, that is, the time of "click" ... hey, it's familiar. This shutter must have been said before! If you want to read it, you can look through the previous articles.

Generally speaking, the faster the shutter speed, the darker the photo will be, and the slower the shutter speed, the brighter the photo will be. Think about it, the shutter will take less light in a few percent of a second than in a few tens of seconds. If there is little light, the photo will definitely be dark.

At the same time, like the aperture, the shutter also has its unique functions-high-speed photography and slow-door photography.

You must have seen the following similar pictures:

This photo records the action of a high-speed moving object and freezes it, which is the shooting effect completed by the shutter in a few thousandths of a second.

The same slow door, that is, slow shutter, must have been seen by everyone.

This is the effect of shooting when the shutter speed reaches several seconds or even ten seconds. Isn't it cool?

Finally, let's talk about exposure, that is, ISO, the sensitivity of photosensitive elements to light in vernacular Chinese.

The higher the sensitivity, the brighter the photo and the higher the ISO value. It is usually the lowest in the sun 100 (except for a few machines like Nikon D8 10). In the shadow, we need to play a high sensitivity. For example, places like the concert hall often hit more than 4 thousand, and Canon 5D3 was used at that time.

So what are the characteristics of sensitivity? That's the effect of image quality.

The higher the exposure, the worse the image quality, which is its characteristic. Exposure to a certain extent will have obvious noise, like this:

This is one of the most annoying things for photographers. There is no way to improve sensitivity in some dark situations, so you must accept the existence of noise. Unless ... unless you use high-end cameras, such as Canon 1DX and Nikon D5, gnome male-"... that's why you use 5D3 when shooting in concert halls and other occasions. For example, our mobile phone camera has a lot of noise when shooting at night.

Aperture, shutter and ISO will all affect the brightness of photos. For example, if you want a large aperture when taking a portrait, the shutter can't be slow, and you can adjust the sensitivity. Everyone wants to make a splash, so the shutter speed should be kept at a high speed, and everyone should adjust the shutter and aperture. This is one thing.

When you take a picture, you decide three elements, first decide that 2.

The three elements of photography are shutter, aperture and sensitivity (iso).

The shutter is the length of exposure. Simply put, it is to control the speed of taking pictures. The longer you take a photo, the more light you get, and the brighter the photo will be, and vice versa. You can see the camera shutter value, which is generally displayed as 1/xxx, indicating how many fractions of a second it takes to take a photo.

You can raise the shutter value a little during the day (the value mentioned here is the denominator value) to facilitate snapshot, and you can lower it relatively at night. For beginners, it is not recommended that the shutter value be lower than 50.

Aperture is a numerical value determined by the camera lens. It's like a window. If the aperture is large, there is more light, and if the aperture is small, there is less light. However, its value is the opposite. A large number means less light, and a small number means more light. When you adjust the aperture value, you can look at your lens and obviously feel the change of aperture size.

In addition to controlling the light, the aperture has a more important role, that is, controlling the depth of field, that is, the background of the photos you take is blurred. The smaller the aperture value, the more blurred the background, and the larger the aperture value, the clearer the background.

Therefore, we usually use a large aperture (small aperture value) for close-up shots and a small aperture (large aperture value) for panoramic shots. It should be noted here that the photos taken with large aperture are easy to deform, so it must be controlled well when using.

Sensitivity (iso) is the performance value of the camera's sensitivity to light. The bigger the number, the more sensitive the camera is to light, and the more light there is in the photo. The smaller the number, the less sensitive the camera is to light, and the darker the photo light is. When adjusting the sensitivity, be careful not to adjust it too high, so there will be more noise in the photo and the photo will be unclear. What is the specific adjustment value? According to different camera performance, the general range is 100-800.

Three factors are determined when taking pictures. Decide that first.

1. hole

Aperture is the size of the aperture on the camera lens. The aperture is represented by f, and the' value after f is the aperture value.

The aperture values are generally: F/ 1, F/ 1.4, F/2, F/2.8, F/4, F/5.6, F/8, f/1,f//kloc.

Generally speaking, if the aperture value is less than F/2.8, including F/2.8, we are classified as a large aperture, such as F/ 1, F/ 1.4, F/2, F/2.8, and if the aperture value is greater than F/8, including F/8, we are classified as a small aperture.

The larger the aperture, the larger the aperture and the greater the exposure in the same time unit. But it should be noted here that the larger the aperture, the smaller the value after f, in other words, the smaller the number after f, the larger the aperture.

We should remember: "The aperture value after F is inversely proportional to the exposure, and the aperture is directly proportional to the exposure." That is to say, the greater the value after f, the smaller the exposure, because a large value of f means a small aperture, a small aperture, less light passing through, and less exposure per unit time.

2. Shutter

Shutter is actually the time required for exposure.

The faster the shutter speed, the shorter the exposure time and the less exposure per unit time. The slower the shutter, the longer the exposure time, and the greater the exposure per unit time.

The shutter value is expressed in seconds or fractions of seconds, such as 1 second, 2 seconds, 1/30 seconds, 1/60 seconds,1125 seconds, etc.

Generally speaking, a shutter slower than 1/60 seconds is a slow shutter, and a shutter faster than 1/250 seconds is a high shutter.

3. Sensitivity ISO

Sensitivity refers to the sensitivity of camera photosensitive elements to light. By adjusting the sensitivity value, the image in low light environment can show brighter effect. ISO values are usually divided into different values, such as 50, 100, 200, 400, 800, 1600, 3200, 6400, 12800, etc. Basically, every time you increase a gear, the ISO value will increase by a multiple of 2.

The higher the sensitivity value, the brighter the scene in low light environment, and the lower the sensitivity value, the less the brightness of the scene can be improved. However, it should be noted that higher sensitivity can increase brightness and shutter speed, but at the expense of the fineness of image quality. So as long as the light is acceptable, the shutter speed can be guaranteed, and the sensitivity can be lowered as much as possible to ensure the image quality.

4. Exposure relationship among aperture, shutter and ISO

When we adjust the aperture size, shutter speed and sensitivity of the camera, the photos can be lightened or darkened, that is, the exposure adjustment.

① If the aperture size is fixed, you can lighten or darken the photo by increasing or decreasing the shutter speed or ISO.

② If the shutter size is fixed, we can lighten or darken the photo by increasing or decreasing the aperture size or ISO.

③ If the ISO size is fixed, you can increase or decrease the aperture size or shutter speed to lighten or darken the photo.

The three elements of photography are aperture, shutter and sensitivity.

1, aperture

Aperture is the size of the aperture on the camera lens. The aperture is represented by f, and the value after f is the aperture value. The larger the aperture, the larger the aperture and the greater the exposure in the same time unit. But it should be noted here that the larger the aperture, the smaller the value after f, in other words, the smaller the number after f, the larger the aperture.

2. Shutter

Shutter is actually the time required for exposure. The faster the shutter speed, the shorter the exposure time and the less exposure per unit time. The slower the shutter, the greater the exposure per unit time.

3, sensitivity ISO

Sensitivity refers to the sensitivity of camera photosensitive elements to light. By adjusting the sensitivity value, the image in low light environment can show brighter effect. ISO values are usually divided into different values, such as 50, 100, 200, 400, 800, 1600, 3200, 6400, 12800, etc. Basically, every time you increase a gear, the ISO value will increase by a multiple of 2.

Photographic requirements include:

1. When shooting, the camera must be mounted on a tripod to prevent the camera from shaking. Try to keep the camera close to the subject, and be careful not to introduce unnecessary shadows.

2. The focal track can make the camera move along the X-axis and Y-axis in very small increments, and can accurately control the camera position and the depth of field of the picture. It is very troublesome to move the triangular bracket to the ideal position.

3. The cable release device is installed on the tripod. If you are not careful when pressing the shutter, the camera may still shake, so in order to avoid this situation, I suggest you use cable release.

4. When shooting, when the background of the shooting object is black, then the shot image can look the clearest.

5. Wrap it with a white card or aluminum foil to reflect the light on the object and illuminate the shadow on the object. Be careful not to let this card appear in the shooting range.

What are the three elements of aperture shutter iso?

Aperture represents the size of the effective entrance hole of the camera lens, which is expressed by F value. The larger the value is, the smaller the entrance hole is, and the proportional sequence with root number 2 increases. Because the aperture value is defined as inversely proportional to the diameter of the hole, the area of the hole will be reduced by half for every 2 times of the root sign.

The shutter represents the exposure time of the photosensitive element, which is usually expressed as the reciprocal of the exposure time, and is increased by one step in an equal ratio of 2. The larger the value, the shorter the exposure time.

Iso indicates that the sensitivity is not directly related to the aperture shutter. Photos with high sensitivity (iso) are brighter in color (this is the intuitive feeling of looking at photos), while photos with low iso are darker in color.

Aperture gear design

The numerical difference between two adjacent files is 1.4 times (the square root of 2 is 1.4 14). Between two adjacent files, the diameter of the light hole is twice the root number, the area of the light hole is twice, the brightness of the image formed on the negative is twice, and the time required to keep the same exposure is twice.

It is worth mentioning here that the smaller the aperture f value is, the larger the aperture is, and the more light enters in the same unit time, and the amount of light entering at the upper level is exactly twice that of the lower level. For example, if the aperture is adjusted from F8 to F5.6, the amount of light entering will double. We also say that the aperture is enlarged by one level.

What are the three elements of photography?

Three elements of photography:

1, photography aesthetics.

2. The layout of the theme.

3. Photography runs out.

Photography refers to the process of recording images with some special equipment. Generally, we take photos with mechanical cameras or digital cameras. Sometimes photography is also called photography, that is, the process of exposing a photosensitive medium by using the light emitted or reflected by an object.

Someone once said an incisive language: the photographer's ability is to transform the fleeting ordinary things in daily life into immortal visual images.

Extended data:

Three basic elements of photography:

Whether you know nothing about photography before or have made great achievements, whether you improve your photography skills in order to become an amateur photographer or a professional photographer for a living, we will all have a curse.

Photography is not only a discipline, but also a very learned art. We can rediscover the beauty in life through the third eye, which is a very special place for photography. Next, the century bride Bian Xiao wedding photography studio will take you into the world of photography.

For any outstanding person who has made achievements in photography, the most important thing is to develop your "eyesight", that is, learn to observe. You must have seen some beautiful photos: "How I wish I could take such photos!" " "But if you just look at it, you can't improve your photography skills.

When you see a beautiful photo, can you tell why it is beautiful? Can you tell me how the authors of these works took these photos to make them so radiant? Of course, sometimes newspapers and magazines will tell you the brand and lens of the camera used to take these photos, and even the aperture and film used.

These are technical details, but they are not helpful for you to take good photos. Just as you know the names of the pigments and brushes used by Leonardo da Vinci, you can't draw a famous painting like Mona Lisa. _ _ _ In the process of photography, the most important thing is to know what to pursue.

After absorbing what should be pursued in photos over time, you will begin to have your own methods and opinions on how to observe and absorb the beauty of the world around you. This ability and skill to discover the beautiful scenery around the world is called "photographer's vision".

There are three principles here. As long as you pay attention to these three principles, you will soon find that you can watch, analyze and evaluate a beautiful photo in a new way. More importantly, you will start to observe the world with new standards and new ways, so as to grab your lens with new eyes.

These three principles are:

1, the theme you want to express.

2. the protagonist who can attract attention.

3, concise and clear picture.

Baidu encyclopedia-photography

Three elements of photography?

The three elements of photography are shutter, aperture and sensitivity (iso).

The shutter is the length of exposure. Simply put, it is to control the speed of taking pictures. The longer you take a photo, the more light you get, and the brighter the photo will be, and vice versa. You can see the camera shutter value, which is generally displayed as 1/xxx, indicating how many fractions of a second it takes to take a photo. You can raise the shutter value a little during the day (the value mentioned here is the denominator value) to facilitate snapshot, and you can lower it relatively at night. For beginners, it is not recommended that the shutter value be lower than 50.

Aperture is a numerical value determined by the camera lens. It's like a window. If the aperture is large, there is more light, and if the aperture is small, there is less light. However, its value is the opposite. A large number means less light, and a small number means more light. When you adjust the aperture value, you can look at your lens and obviously feel the change of aperture size. In addition to controlling the light, the aperture has a more important role, that is, controlling the depth of field, that is, the background of the photos you take is blurred. The smaller the aperture value, the more blurred the background, and the larger the aperture value, the clearer the background. Therefore, we usually use a large aperture (small aperture value) for close-up shots and a small aperture (large aperture value) for panoramic shots. It should be noted here that the photos taken with large aperture are easy to deform, so it must be controlled well when using.

Sensitivity (iso) is the performance value of the camera's sensitivity to light. The bigger the number, the more sensitive the camera is to light, and the more light there is in the photo. The smaller the number, the less sensitive the camera is to light, and the darker the photo light is. When adjusting the sensitivity, be careful not to adjust it too high, so there will be more noise in the photo and the photo will be unclear. What is the specific adjustment value? According to different camera performance, the general range is 100-800.