What is an excerpt? When is this function used and is it needed in the camera?

Quality photos can not be obtained in automatic mode with standard settings. Of course, they can be beautiful and interesting for a certain circle of people, but it is difficult to call their artistic work.

Such a function, like shutter speed in a camera, is required for shooting moving objects, for obtaining clarity, sharpness or, conversely, blurring certain elements (for example, water flow).

So, what is an excerpt? From a technical point of view, this is the time period for which light rays pass through the lens opening, reaching the photosensitive element.

From a scientific point of view, we explained what an excerpt is. And now we will consider in more detail what it is like and how to achieve the desired effect.

Calculate this parameter in seconds: 1 / 30sec, 1 / 60sec. Often the camera displays only the denominator, so do not be afraid. In compact cameras, the row is displayed in this way: 1,1 / 2, ¼, 1/8 and so on.

In any apparatus for photographing, there is such a function as the exposure priority. This means that the aperture is automatically selected for the selected value.

Short exposure

Now you know what exposure is. Let's consider, in what cases are the above values used? Immediately indicate that the short exposure is intended for shooting animals, racing, sports, so that the moving object in the photo does not look "blurry". The faster the object moves, the less the parameter is set. But remember that in this case, good lighting is required, since less light enters the shutter. The diaphragm will help to correct the situation, the degree of which we increase in proportion to the decrease in exposure.

Long exposure

This is used in low light and for special effects. But here it is necessary to use a tripod, otherwise the blur will be on the entire photo. If you set high photosensitivity, then expect that in the dark, the photo will inevitably have a "noise". It can be corrected in the "Photoshop" program, but the quality of this decreases.

The amount of exposure is of particular importance in the photography of water, regardless of whether it is a fountain or a river. Too fast the shutter can create the effect of a frozen surface, and too long - the lack of sharpness. So, for slow rivers and streams the degree from 1/30 to 1 / 125с is suitable. In windy weather, set the parameter from 1/125 to 1/250. Rapid streams should be removed at rates of about 1 / 1000s.

If you have a high-quality mirror or professional camera, you can shoot the night sky with a light exposure of up to several hours. So you get not only an interesting photo, but also a trajectory of the Earth's motion . Do not forget about photosensitivity, otherwise the noise can be simply unbearable.

Underwater photography uses short exposures, not more than 1 / 30s, as you are constantly moving, which means that the probability of getting a blurry image is high.

Now it became clear to you what the exposure is and in what cases it is applied. If desired, interesting effects can be obtained even on advanced compact cameras, and if we talk about professional equipment, then masterpieces are provided here. Take into account the features of your camera, as well as the conditions of shooting, because even sunny or cloudy weather drastically changes the result.