How much is the exposure compensation generally adjusted?

Exposure compensation is generally around 2-3 ev.

Brief introduction of exposure compensation:

Exposure compensation is a shooting method that consciously changes the "appropriate" exposure parameters automatically calculated by the camera to make the photos brighter or darker. Photographers can adjust the brightness of photos according to their own ideas to create unique visual effects. Generally speaking, the camera will change the aperture value or shutter speed to adjust the exposure value.

The role of exposure compensation:

The shooting environment is dim, so it is used for exposure compensation.

If the photo is too dark, you should increase the EV value. Every time the EV value increases, it is equivalent to doubling the amount of light entering. If the photo is too bright, the EV value should be reduced. Every time the EV value is reduced, it is equivalent to doubling the amount of light entering. According to different cameras, the compensation interval can be adjusted in units of 1/2(0.5) or 1/3(0.3).

It may still be underexposed in a dark environment. At this time, it is necessary to consider matching the flash or increasing the ISO sensitivity of the camera to improve the brightness of the picture.

Exposure rate:

1, backlight photography:

If your subject's back is facing the bright sun, that is, in the case of backlight, exposure compensation must be carried out in order to accurately show the details of the subject, otherwise, you will either take a silhouette or a gray image with unclear levels.

2. The reflectivity of the subject itself is too high or too low;

For example, shooting on the mining face of a coal mine, or shooting a bride wearing a white wedding dress in a high-profile background, if the exposure given by the exposure instrument is not compensated, then the dark coal and white skirt recorded on the film may be the same gray tone of 18%.

3. Reciprocity rate failed:

If the exposure time is too long (more than l/ 10 second) or too short (less than11000 second), the exposure curve of ordinary film will be distorted. If you still shoot according to the exposure combination given by the exposure meter, there will be underexposure. If color film is used, there will be problems of color saturation and color temperature deviation.

4. Shooting moving objects in extremely weak light:

Sometimes the light at the shooting scene is particularly weak, the artificial light illumination is insufficient, the subject is moving, and the film sensitivity in the camera can not meet the requirements of spotlight. At this time, it is also necessary to make compensation, that is, reduce the given exposure within the allowable range, control the number of steps to reduce the exposure during development and carry out forced development (or "sensitized development"), and also get a clear negative.