Photography environment for various sensitivity values

Choosing the sensitivity should be said to be a function of the digital camera to control the EV value more flexibly than the film machine, which makes it easier for the DC to choose the **combination** in more occasions and obtain the highest quality**. In less well-lit places like indoors, there are higher sensitivity options, and with the right aperture, you can shoot within a safe shutter speed (the reciprocal of the lens's focal length x focal length factor)** without worrying about image shake.

Just in terms of normal DC:

ISO50 is generally only used when facing a strong light source, or when the light source is sufficient to get the ideal combination (for example, if you want to blur the background and reflect the dragging motion when shooting a windmill on a sunny day, choose the lowest sensitivity, wide aperture, and lower shutter speed).

ISO is mainly used outdoors on sunny days and is a standard setting.

ISO200 is generally used outdoors on cloudy days, outdoors with dark shadows and well-lit indoors, but if you are shooting in automatic or A gear, choosing ISO200 is equivalent to increasing the shutter speed by 1x (ISO100), which will allow you to get sharp images in most situations. And if you use T gear, you can also greatly reduce the worry of insufficient **. It can be used for outdoor capture, sports photography, and the use of a telephoto lens (due to the increased safety shutter speed).

ISO400 is used more indoors, but it should be noted that the irritation point of ordinary cameras also begins to increase significantly at this time, so it should be used according to the situation. If you have a tripod, most people will still choose ISO to shoot, but the shutter speed is limited, so it still depends on what kind of ** combination you choose, such as shooting indoor competitions or using ISO400 or even higher sensitivity.

Above ISO400, generally limited to the night and indoors without obvious light sources, professional-grade SLRs can obtain acceptable quality in the range of ISO1600 or even higher sensitivity, but ordinary cameras are beyond their reach.

These are just the general cases, and you still need to be flexible when you need to get different effects. It is recommended to shoot with A stop (aperture priority) at ordinary times, so that it is easier to establish an understanding of the best combination.

In general, the smaller the ISO value, the higher the delicacy of the shot, but relatively speaking, the shutter speed will be slower, especially when shooting night scenes, the situation will become more prominent.

Normally, 80 or 100 ISO is enough during the day, but at night you need to follow the environment at the time.

Just use the template mode. It's very convenient.

ISO can be set to automatic.

Don't think about iso...

Or look at the shutter speed. If it is less than 1 30s, you need to improve the ISO...

1: This is not to be used, the noise is loud to 400, and the blacker the brighter the brighter the 50 brighter.

2: This number is not necessarily used under what conditions, depending on the effect that the photographer wants!

There are two main aspects of the influence of light sensitivity on photography

1. Speed, higher sensitivity can get faster shutter speed;

2. Image quality, when the sensitivity is lower, the more delicate the image quality will be. The higher the sensitivity, the greater the noise of the image quality, that is, the lower the clarity of **.

Sensitivity, also known as the ISO value, is a measure of how sensitive a film is to light. The sensitivity can effectively improve the brightness of **, and when the picture in the camera is too dark, the sensitivity can be turned up, which can effectively solve the problem of low brightness of the picture. For example, when the camera parameters are displayed as: , 1 160 seconds, ISO400", you can find that the picture in the camera is relatively dim, at this time, you can adjust the sensitivity to "ISO1000" without adjusting other parameters, so that the color of the picture can be brightened and the color is more vivid.

However, it is important to know that only increasing the brightness by adjusting the sensitivity will increase the noise of the dim image. Therefore, this simple setting method is not suitable for shooting in too dark environments.

Light sensitivity, also known as ISO in photography, refers to how sensitive a camera or film is to light. In photography, light sensitivity can affect the correctness of the image, the appearance of noise, and the clarity and color reproduction of image quality. Understanding and mastering light sensitivity is essential to shoot high-quality**.

There is a numerical value for sensitivity, such as ISO 100, ISO 200, ISO 400, etc., which represents the amount of light required by the camera or film to process the light. When the sensitivity is lower than the base light, it takes a long time for the camera or film to get it right, which is suitable for shooting in good light. And when the sensitivity is higher, the sensitivity of the camera or film to light increases, and the time is shortened, which is suitable for shooting scenes with low light.

In addition to affecting the time, the sensitivity also affects the noise of the light. When the sensitivity is higher, the pixels become more sensitive, and more noise is generated in **. Therefore, when shooting in low-light scenes, although you need to increase the sensitivity, don't blindly increase it, otherwise it will cause too much noise and affect the quality.

Conversely, when there is enough light, try to reduce the sensitivity of the light, which reduces the appearance of noise and improves the clarity and color reproduction of **.

In short, it is very important to understand the sensitivity of the shooting in order to shoot high-quality, and it is necessary to choose the appropriate sensitivity according to the shooting scene, as well as to deal with the noise that may be generated during post-processing. In this way, you can shoot more clearly, with high quality**.

Sensitivity, in layman's terms, is the sensitivity of the camera's sensor to light. The higher the sensitivity, the more sensitive the sensor is to light. When the light is very dark, under the same aperture and shutter settings, the ** shot at low ISO may appear very dark, and the image is also a little "hazy".

In general, when the aperture cannot be increased or the shutter speed cannot be reduced, it is often used to increase the ISO to obtain sufficient ** amount.

But as the ISO increases, so does the "noise" generated, and it looks like there are many "pittings". Therefore, when the light is good, or there are no setting restrictions, you should try to shoot with ISO80 or 100. This way, the ** will look much cleaner and clearer.

Only when the light is very poor and it is not possible to increase the aperture or decrease the shutter speed to meet the ** amount, the method of increasing the ISO is used. IXUS210 such a card machine, the noise control function of the camera itself is very poor, ISO to 400, the noise is already a lot, more than 400 full picture "pockmarks", it is unbearable.

It's a big question, so let's put it simply.

Light sensitivity was an important indicator of film in the film era. The international standard is expressed by ISO, and China originally followed the German DIN system, 21 is equivalent to ISO100, and later ISO was also adopted. High sensitivity means that the film is highly sensitive to light, which is convenient for shooting in low light, but with high sensitivity, the particles of the film will be coarse after film shooting, and it looks very rough and the details are lost.

There is only one sensitivity of each type of film, but there are also those that use sensitization to increase the sensitivity.

In the digital age, film was replaced by sensors CCD and CMOS, and the concept of sensitivity was still used. The ISO sensitivity is determined by the sensor, so the sensitivity of the digital camera is adjustable, and increasing the sensitivity is actually to amplify the electrical signal of the sensor, and the electronic term is gain. For the sake of popularity, it is not called gain, but is called to increase the sensitivity.

Turning up the sensitivity is also harmful, and like film, it also produces noise and loss of detail. The more advanced the machine, because the sensor is relatively large and the internal processing system is good, the noise will be suppressed as much as possible to restore the details.

In the case of the same aperture, the higher the sensitivity, the easier **, the faster the shutter, the stronger the grain, the lower the sensitivity, the more difficult **, the slower the shutter can be, so in the past, when the film was directly out of the film, it could only be brightened and darkened by the sensitivity, and now digital cameras can be adjusted in the later stage, so now the practicality is not great, and the sensitivity should be high when shooting at night 800. Then it is easy to be in low-light conditions**.

Think for yourself.

The lower the sensitivity value (such as ISO100, ISO200), the lower the required shutter speed at the same aperture, the more delicate and detailed the image quality (such as shooting scenes, flowers and plants, or portraits); The higher the sensitivity (such as ISO2000 or even ISO3200), the higher the allowable shutter speed at the same aperture, the loss of image quality, and the easy generation of noise and loss of detail on digital cameras (suitable for shooting high-speed objects in dark environments, such as urban sports activities). To summarize simply, low sensitivity is suitable for shooting bright environments or slow objects, and high sensitivity is suitable for shooting dim environments or high-speed objects.

ISO sensitivity is an index of the sensitivity to light. The higher the sensitivity, the more sensitive it is to light. In general, when shooting moving objects or low-light situations, the higher the sensitivity, the better.

However, under high sensitivity, there are more image noise signals, and the clarity is also reduced, on the contrary, the light sensitivity is low, the image noise signal is reduced, and the image quality is delicate, but it is not suitable for shooting moving objects or low-light environments.

Many gamers often encounter the following situation: when shooting in a place where flash is prohibited such as exhibition halls, we have to disable flash, and the result is a blurry **, and if flash is used, the subject will have a reflective result that affects the picture. The same can happen indoors or in darkly lit places.

An easy way to get a good result without using a flash is to adjust the ISO. Of course, if you increase the ISO setting, it will make the graininess of ** more serious, which requires the user to be flexible according to the situation at the time. As we know about conventional cameras, ISO sensitivity indicates the sensitivity of the film to light, and there is an equivalent value.

The higher the sensitivity value, the better it is for use in low-light places, but it will lose the vividness and naturalness of the color.

Incidentally, when you are serious about hue and image reproduction, it is best to use low-sensitivity film with ISO sensitivity of 25 and 64. In order to be able to meet the needs of a wide range of situations, ISO 400 speed film is often used, and there are even disposable cameras with ISO 800 and 1600 speed (disposable cameras) that are suitable for taking photos in dark places.

Although digital cameras do not use film, they are equipped with similar functions and can also change their ISO speed (some models cannot change the ISO speed setting, so please check the manual of your digital camera). In this way, when you want to get a better shot, set the ISO to 100 and 400 when the light is low.

Canon Zhongheng Station monopoly.

The theory upstairs is detailed, and I talk about the experience.

If you use DC, try to be as low as possible, when the light is not good, up to 400 with SLR, the lower the better, the best by the shortcut key to adjust the sensitivity, generally usually put in the lowest gear, such as 200, when using the situation, 400 on a cloudy day, add to 800 indoors, up to 1600.

In fact, the best thing to look at is the shutter data, use the appropriate aperture, adjust the ISO, just look at the appropriate shutter, outdoor is generally no problem, the indoor light is poor, 1 30s you can hold it, you can adjust the shutter to the smallest ISO accordingly, in order to see if the film is shaky, or the subject is easy to move, then increase the sensitivity appropriately. If you use a head or even a head, then you won't be entangled, such a head ISO800 has a shutter of a few hundredths of a second in a bright room, and it is enough to shoot sports.

<><What is sensitivity

Sensitivity: also known as ISO value, the ISO of digital camera refers to the sensitivity of the sensor to light, the higher the ISO value, the stronger the sensing ability of the sensor to light.

Changing this value can adjust the sensitivity size, the larger the number, the higher the sensitivity, and the more sensitive the camera is to light; The smaller the number, the lower the sensitivity and the less sensitive the camera is to light;

The effect of light sensitivity on light and shade

The smaller the sensitivity (ISO), the lower the perceived light sensitivity, and the darker the picture;

The higher the sensitivity (ISO), the higher the perceived light sensitivity, and the brighter the picture;

The effect of light sensitivity on image quality

In the case of the vast majority of grandchildren:

The lower the sensitivity (ISO), the less noise in the image and the more detailed the image quality.

The higher the sensitivity (ISO), the more noise there is in the image, and the rougher the image quality will be.

How to choose sensitivity

If the ambient light is good, such as outdoors with plenty of sunshine, then you can choose a low ISO. Set the ISO to 100 or 200 to ensure the best image quality. If the light or Kai line is not good, but the camera is fixed with a monopod, a low ISO can also be used;

If the light is not good and there is no tripod, you can only shoot handheld, even if the aperture is already the maximum, but it still does not reach the safe shutter value, in order to prevent blurring caused by handheld shake, you can only shorten the shutter time by high ISO to ensure that the picture is clear.