Photography. What are the three elements of exposure?

Photography. What are the three elements of exposure?

Three factors that affect exposure are aperture, shutter speed and sensitivity.

These three factors combine to form the correct exposure.

What are the three elements of camera exposure?

1, aperture, the smaller the value, the larger the aperture, the stronger the exposure, normal exposure, the faster the shutter, and it is not easy to paste.

2, shutter, the larger the number, the slower the shutter. Please note that 1/200 is greater than 1/500.

3, ISO, the greater the value, the greater the sensitivity, the stronger the exposure ability, too high, easy to produce noise.

How to control the three elements of photographic exposure in camera exposure

First of all, say three elements. The most important function of aperture shutter sensitivity (ISO) is to control luminous flux and depth of field. The shutter controls the exposure time and sensitivity. If the light is not ideal, you can get the correct exposure by increasing or decreasing the sensitivity. In order to control exposure, we should be familiar with the use of reciprocity. For example, the correct exposure EV value is 1, and the exposure combination we get is shutter 125 aperture 8 ISO 200. In order to achieve other special effects, we can use reciprocity transformation to get the EV value 1. Other exposure combinations such as 60 8 100,

125 5.6100,250 8 400 If you want a shallow depth of field, it can be 1000 2.8 200,1000/0.4100. These groups of exposures are all the same, that is, we assume EV = 65438+. hope this helps

Relationship and application of three elements of camera exposure

This is unclear in a few words.

Simply put:

The larger the aperture, the shallower the depth of field.

Shutter, high-speed shutter, can condense moving objects, slow doors, clouds and water illusions.

The higher the ISO, the stronger the shooting ability in dark light, but the more noise.

The same exposure can have different exposure combinations.

What are the three elements of photography?

Shutter, aperture, sensitivity (determines photo exposure)

Composition, hue and hue (determine the style of the photo)

What are the three factors that affect exposure?

Three elements of exposure: aperture, shutter and ISO.

Hope to adopt

What are the three elements of exposure and how do they affect exposure?

Three factors that affect exposure are aperture, shutter speed and sensitivity. These three factors combine to form the correct exposure.

1. aperture: that is, f1.4f2.8f5.6f8f16f2f32; Each level represents less exposure, that is, f2 is one level less than f 1.4. It can be seen that the aperture difference corresponding to the first exposure is 1.4 times. Why?

In fact, it is a ratio. Aperture = lens focal length/aperture. (So most of the logo on the old lens are 1: 1.4). That is to say, taking the meter head as an example, it is 50mm f2, and the actual diaphragm at this time is 25 mm.

Knowing this, we can understand why there is a difference in exposure, and the aperture difference is 1.4 times. (Because this ratio is related to the aperture, the light flux is obviously proportional to the cross-sectional area, and the area is proportional to the square of the diameter. )

Knowing this, you can understand why telephoto and large aperture lenses are so expensive. Take the lens of 200mmF2 as an example. Under the maximum aperture, his aperture is 100mm, so his front lens should not be less than100 mm; For the lens with 50mmF 1.4, the aperture at the maximum aperture is only 50/ 1.4=35mm. Therefore, the telephoto lens with large aperture you see is usually thick, and because the lens is relatively large, the natural weight exists objectively, so the self-contained lens servo system must be accurate and fast to drive, which is naturally expensive (of course, this is only one of the reasons for the high price).

I can also understand why there are lenses with floating apertures, such as 18-35/f3.5-5.6. Why 3.5-5.6? (The end of 18 is set to the maximum aperture f3.5, but the aperture itself changes when zooming? You see, this is a way to save costs. Because of the constant aperture zoom lens, such as 70-200/f2.8 lens, the aperture at the 70th end is 25mm, and the aperture at the 200th end is 71mm.. In order to obtain a constant f2.8 aperture, it must be considered that the front lens is close to the telephoto end during the whole zoom stroke. So a zoom lens with a constant aperture

The main functions of the aperture are: depth of field (control range and darkness, whether it is a color block or just can understand the content; Clear range)

The side effect is that it will affect the shutter speed.

2. Shutter speed: expressed in time. 30s， 15s，8s，4s，2s， 1s， 1/2 1/4 1/8 1/ 15 1/30 1/60 1/ 125 1/250 1 .......

Similarly, adjacent shutter speeds differ by one exposure. Obviously, the numerical difference is twice.

The main function of the shutter is to solidify (whether it is clear or ghosting, the most important concept is the safety shutter-see how to take a clear photo for details).

Side effects include: affecting the aperture size.

3.ISO sensitivity: The national standard means ISO100 200 400 8001600 3200 6400. ....

Similarly, adjacent ISOs differ by one exposure. Obviously, the value is a sequence of two.

The main function of ISO is to use faster/slower shutter speed or smaller/larger aperture.

The side effect is noise. The larger the ISO, the more obvious the noise and the worse the image quality. However, the improvement of ISO can use a small aperture or increase the shutter speed, which is beneficial to the realization of the photographer's intention.

Three factors affecting the exposure of characters

The influence of exposure on color in photography is mainly reflected in the influence on hue, lightness and purity. Correct understanding and application of this knowledge will help to control exposure correctly, accurately reproduce the color of the subject and creatively express the color, and improve the artistic level of photography.

[Keywords:] color influence of contact elements

"Color is the son of light, and light is the mother of color", "There is colorless light in the world, but there is no dim color". These famous conclusions about light and color fully illustrate the dependence of color on light and the inseparable characteristics between them. In photography practice, from a technical point of view, exposure plays a decisive role in the success or failure of photography. It is of great practical significance for the correct restoration and accurate reproduction of colors in contrast films and the creative expression of colors.

In the specific shooting process, there are many factors that affect the color, many of which are beyond the photographer's control and interference, such as the direction and intensity of sunlight, the environment around the subject, the roughness or smoothness of the subject's surface and so on. When other conditions cannot be changed artificially, exposure becomes the decisive factor of color. In order to truly understand the formation of color, the analysis of color is essential. The introduction of color theory in some photography books is either superficial, too difficult or even wrong, which intentionally or unintentionally misleads photographers. When we talk about color, we can't help but involve three attributes of color. There are countless colors in the world, but any color (except black, white and gray) has three attributes: hue, lightness and purity.

Three factors that determine taking photos with mobile phones.

Three elements of photography: exposure, focusing and composition. 1. exposure controls proper exposure by focusing and adjusting shutter speed. Most digital cameras can control exposure by auto-focusing and adjusting shutter speed. This is the function of automatic exposure photography (AE). Although it is called automatic exposure, it is not always possible to adjust to the most appropriate exposure. ...

Canon SLR M file can't take pictures, and the photos are dark. What's going on here? How can I take pictures?

That means you know nothing about cameras. P file is recommended.