Every single lens reflex digital camera, there will be 「introduction exposure compensation 」 settings, exposure compensation, refers to when we complete metering, setting the aperture shutter, in response to ambient light changes, on the additional exposure for addition and subtraction. Exposure compensation is also a kind of exposure control, usually common in ± 2-3EV around, if the ambient light can increase Dim, the exposure value (such as adjusted to the + 1EV every single lens reflex digital camera, there will be 「introduction exposure compensation 」 settings, exposure compensation, refers to when we complete metering, setting the aperture shutter, in response to ambient light changes, on the additional exposure for addition and subtraction. Exposure compensation is also a kind of exposure control, usually common in ± 2-3EV around, if the ambient light can increase Dim, the exposure value (such as adjustments to + 1EV, + 2EV) to highlight the sharpness of the picture. Digital cameras filming process, if you press the shutter button halfway, the LCD will display and the final effect chart almost picture, autofocus, auto exposure all started. This time of exposure, it is the final picture of exposure. Picture if obvious bias bright or Dim, the camera's automatic metering accuracy greater deviation, to force the exposure compensation, but sometimes, the brightness of the display when shooting with the actual shooting results have access. Digital camera you can browse the pictures immediately after photographs, at this point, you can more accurately see shooting out of the darkness of the screen, won't have access to. If shooting results clearly too bright or too dark, try shooting, force the exposure compensation. Previously, we discussed the camera metering system. Under normal circumstances, a comparison of pure light to camera's built-in metering programs, you can shoot good photos; but the change in the light of the relatively large, the camera will occur in metering, then shoot out misjudgment of the photos is not too bright, or too dark. The situation is very yaoyang let the camera metering system occurred misjudgment? we are here to give two of the most common example; when filming the screen has a lot of light, reflection of light in the environment is highly original, apart from the scene, extra light reflected light, so that the metering system misjudgment of this strong environmental light, the camera's exposure combinations than normal light value low, beat out photo will Dim. Another example is in the screen shot, there are many shades of objects or low level light reflection of the environment, because the light is absorbed by the body, so that the camera metering spot light when the thought, and set a higher than normal exposure value, shoot photographs would be too bright. In order to enable the photographer can quickly make adjustments to exposure, but do not need to set the aperture, shutter, so he designed the 「introduction exposure compensation 」 such function, simply select 「introduction increase "or" reduce 」 exposure. Digital camera exposure compensation function, EV (that is, we've talked about the level, a unit) as the unit, the adjustment of capacities are divided into 1/2-level 1/level 3 with the two, most digital monocular cameras all have positive and negative 2EV of exposure compensation. The above mentioned conditions for camera misjudgment, but how much you want to set the exposure compensation to adjust the exposure value back? actually different environments can have different exposure compensation, and without a certain value, the more often than not, you must rely on our experience to judge. So beginners in the face of complex lighting environment, you can use the camera 「introduction bracketing 」 function, take some different exposure, by the way, learn how to make a judgment to the exposure compensation. Let's take a look at the following legend:
Our regular pictures of snow abroad, use the camera exposure metrics, beat out the figure clearly Dim use exposure compensation + 1.5EV, snow white is felt more photo black occupies most of the screen, taking it out markedly offset of feeling light and provisional first-use exposure, drawing surface brightness 0.7EV look come naturally.
In order to obtain a more correct exposure, besides using exposure compensation to make up for the lack of the camera is light, you can also use spot metering on the way.
The next lesson, we will introduce basic point metering, Professor how a complex light sources, the got the correct exposure.
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