Exposure compensation (Exposure Compensation)

Although digital camera with advanced metering system, but the metering system sometimes still make mistakes, inaccurate exposure can cause photos of exposures or too simple, therefore we need an adjustment of the metering system exposure error function, but this feature is the "exposure compensation". Exposure compensation function is usually able to associate professional-level and professional-grade digital cameras on the (now more and more while digital cameras with advanced metering system, but the metering system sometimes still make mistakes, inaccurate exposure can cause photos of exposures or too simple, therefore we need an adjustment of the metering system exposure error function, but this feature is the "exposure compensation". Exposure compensation function is usually able to associate professional-level and professional-grade digital cameras on the (now more and more consumer-level digital cameras began with this feature). General exposure compensation function provides users with a-2.0EV to + 2.0EV 0.3EV per 0.5 or as level adjustment. Some of the digital SLR has a wider range of exposure compensation adjustment function, for example from-5.0EV to + 5.0EV.

Using the exposure compensation function, we should note the following: exposure compensation increase 1EV equivalent to the exposure value (EV) reduce 1, or into a doubling of the amount of light.

If your digital camera's Auto mode on the shooting of environment decides to use the aperture of f/8 and 1/125s shutter, sensitivity (ISO) to 100, that is, cause photos owe 13EV exposures (accessible from the histogram see), when you use the + 1.0EV exposure compensation, shutter speed camera will tune into 1/60s or adjust the aperture to f/5.6, let the increase in the amount of light (12EV).

Of course, when you are familiar with your own digital camera metering system, you can take photos before adjusting exposure compensation, trouble.

For example, when you want to take the bright clouds, feel the metering system to make the photos too simple, you can put the exposure compensation value tune into-0.3 or-0.7EV, to get the best shot.