The relationship between the sensitivity of a photographic film and the amount of light exposure req

To sum up: the value of the sensitivity is doubled, and the amount of ** is reduced by one stop.

If you shoot a scene with ISO 100 and use F8 and 1 125 to get the correct amount, ISO to 200 then use F8 and 1 250 to get the same amount.

If ISO is adjusted to 400, F8 can be used, and 1 500 can get the same ** amount.

The higher the sensitivity, the less ** is needed.

**Compensation, for those who have experience in shooting, they know that light is very important to the quality of shooting, and photography is about light"Calculations"。A digital camera is both a shooting tool, of course, that is"Calculations"Tools for light. Since the objects are in different ambient light, proper control** is crucial.

Flashes, reflectors, etc., are naturally very useful, and the correct and proper use of **compensation** is another effective way to do this. Nowadays, commercial digital cameras generally provide the first compensation function, and the adjustment range is generally around the limit. The EV value is called the ** value, and it reflects the combination of aperture size and shutter speed.

The EV value is also related to the brightness of the scene and the sensitivity of the film. In layman's terms, the faster the film sensitivity and the brighter the subject, the greater the EV value. **Compensation is to allow the photographer to correct and adjust the **amount" determined by the camera's metering, so as to obtain an accuracy suitable for the correct performance of the subject**.

**The amount of compensation is expressed by , -1, -2, -3, etc., "+ means to increase ** on the basis of the amount determined by the metering**, "- means to decrease**, and the corresponding number is the series (ev) of the compensation **.

a Proportional relationship.

b Inverse relationship.

The relationship between sensitivity and quantity is ().

It has a higher sensitivity than the IS0100.

b.It doesn't matter if you have sensitivity and ** amount.

c.The lower the sensitivity, the less ** is needed.

d.The lower the sensitivity, the more ** you need to raise (correct number of play answers).

The relationship between sensitivity and quantity is () aging.

The smaller the slide, the higher the sensitivity.

b.The lower the sensitivity, the more ** is needed (correct answer) cThe sensitivity has nothing to do with the amount of **.

Lower sensitivity than ISO100.

You can imagine using a bucket to draw tap water. Water flows down from the pipe into the bucket like light enters the camera, which is the equivalent of this process. When the water fills the bucket, it is excessive, and the amount is equivalent to the amount of water in the bucket.

This is generally determined by the shutter time and aperture size in the camera, which you can think of as the time when the faucet is on and the size of the water flow.

Light sensitivity is the sensitivity of the film or sensor in the camera to light. If the light sensitivity is high, i.e. the film or sensor in the camera is sensitive to the ingress of light, then the light can be recorded by the camera more quickly, which means that the bucket can be filled with water more quickly.

a.The higher the sensitivity, the smaller the amount of ** required; On the contrary, the lower the sensitivity, the greater the amount of ** required. The higher the value, the higher the sensitivity; Conversely, the lower the value, the lower the sensitivity.

c.The sensitivity is graded by the amount of 1 and 3 levels. Such as:

ISO 22 is 1 3 levels more sensitive than ISO 21, ISO 200 24 and ISO 100 21

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**.

In photosensitive film photography, the color temperature is adjusted to ensure that the shooting is accurate and the color is true. In general, ways to adjust the color temperature include adding a color temperature conversion filter in front of the lens or using a light balance filter.

A color temperature conversion filter is a method of adjusting the color temperature by placing a color filter in front of the lens. It selects the appropriate color filter based on the color temperature of the light source as well as the characteristics of the film. Color filters can be divided into two types: cool and warm, respectively, with Yan Feng Zheng Yu to reduce or increase the color temperature.

Cool color filters, such as the blue filter, reduce the color temperature when shooting with warm light sources, such as yellow light, to make ** appear more neutral or cool. Warm color filters, such as orange filters, can increase the color temperature when shooting in cool light sources, such as blue skies, to make ** appear warmer or yellowish.

Light balance filtering is also a method of adjusting the color temperature, which is to correct the color temperature of the light source by using a specific filter while shooting. The choice of light balance filter is also based on the color temperature of the light source and the characteristics of the film. For example, using the Blue Light Balance filter can correct for warmer tones from yellow lighting in the room, resulting in a more neutral color.

When using color filters or light balance filters, you need to choose according to the specific shooting environment and the desired effect. In practice, photographers can adjust the color temperature according to the light source of the scene and their own aesthetic needs. In addition, trial and error and experimentation can be used to determine the best choice of color filter or light balance filter.

It is important to note that color filters or light balance filters can also be used in digital photography, but they need to be adjusted in post-processing. In digital photography, the effect of color filters can be simulated by setting the white balance, or the color temperature can be adjusted using post-production software.

In short, in photosensitive film photography, the color temperature can be adjusted by adding a color temperature conversion filter in front of the lens or using a light balance filter to make the ** present an accurate color effect. The selection and use of these methods needs to be adapted to the specific shooting environment and the desired effect, but also to be freely used according to the individual's aesthetic needs.

The higher the sensitivity key core, the better the image quality and the better the history. （）

a.That's right. b.Mistake.

Correct answer: B