Rookie asking for help: What are high sensitivity and low sensitivity, and what are the results of each?

Rookie asking for help: What are high sensitivity and low sensitivity, and what are the results of each?

High sensitivity and low sensitivity refer to the sensitivity of the camera film, also called ISO. If we don’t discuss the principles and implementation, we can’t explain it clearly in one or two sentences. .

The concept of ISO existed in the film era, that is, the same amount of light entering the film, the brightness of the film image.

To give a simple example, with the same lens, shutter speed, and indoors with the same brightness, every time you press the shutter, the light entering the lens is the same. However, the imaging effects of films with different ISOs are different. If the ISO100 film can be exposed normally, then the ISO200 film will definitely appear brighter, the ISO400 film will definitely make the photo more overexposed, and so on. . .

Knowing this relationship, it is actually easy to understand the actual usage of ISO.

When you want to take a long exposure (1S) photo during the day, you must choose a very low ISO, which can balance your brightness and avoid overexposure.

When you want to shoot at a high shutter speed, such as (1/2000), because there is not enough light, you need to raise the ISO to the highest value possible so that the photo will not be too dark.

What does low-sensitivity image quality mean in photography? What about high-sensitivity image quality?

To put it simply, it is the image quality at low sensitivity and the image quality at high sensitivity.

What people say:

The higher the sensitivity, the better the photo. The greater the exposure.

Without the use of a flashlight, the weaker the ambient light, the higher the ISO required to shoot, because the shutter speed can be relatively increased to prevent hand-held photography due to low shutter speed. Shaking causes blurry photos, and the slow shutter speed causes dynamic subjects to be unable to freeze in the photo. Another effect of sensitivity is that the higher the sensitivity, the more noise there will be in the photo.

Why does the camera have such low sensitivity?

Sensitivity is the ISO value in the camera. Generally, it can be effectively adjusted in dark light conditions to improve the brightness of the picture. However, increasing the sensitivity will cause a lot of noise. The sensitivity of home digital cameras cannot exceed 400, while SLRs are much higher. . .

What does SLR low sensitivity mean?

The image quality at the lowest sensitivity.

For example, iso100, or 80

The minimum sensitivity of different cameras is somewhat different

In theory, the image quality is the best at the lowest sensitivity valve, which is also a measure of SLR An aspect of image quality

What is ISO, low sensitivity, medium sensitivity and high sensitivity?

Generally speaking, an ISO value below 200 can be called a lower sensitivity, which can make the picture purer.

ISO values ??above 800 are considered to have high sensitivity. Of course, with the development of current camera technology, ISO values ??of 1600 or even 3200 are acceptable.

As for medium sensitivity, I rarely hear this term. If we use the above numerical range, an ISO value between 200 and 800 can be considered medium sensitivity, haha.

Is it important to have low and high sensitivity in a DSLR? What is it used for?

Generally refers to sensitivity. Film and photoreceptor are different. Chemicals react chemically after being exposed to light. In order to make the photosensitive speed faster, the light must be stronger. In other words, the larger the drug particles are, the faster the photosensitive speed will be. Therefore, when the sensitivity is high, the particles will be larger. Different photoreceptors have a certain pixel size, which is not as obvious as film under normal light. But in high and low light situations, noise may appear.

What does the person who sells the camera mean when he says that the camera feels much better?

Feeling high? High sensitivity? If so, this is only for darker scenes or high-speed moving objects, but high sensitivity also has side effects, that is, poor image quality, increased graininess, color distortion, etc.

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