Guide to digital camera exposure compensation.

First, exposure compensation (EV) is actually the concept of photography photographer photographic techniques to master the use of their own photographic equipment through the calculation of the ambient light to capture the process of imaging features. .The process and equipment aperture value (the control of flux per unit time into the camera), shutter speed (exposure time) and ISO (light sensitivity, sensitivity to light) on. .Today, I, exposure compensation (EV) is actually the concept of photography photographer photographic technique to master the use of their own photographic equipment through the calculation of the ambient light to capture the process of imaging features. .The process and equipment aperture value (the control of flux per unit time into the camera), shutter speed (exposure time) and ISO (light sensitivity, sensitivity to light) on. .Today, the traditional equipment, and DC will adopt its own internal procedures, the calculation of the ambient light to automatically adjust the aperture, shutter or ISO value. .However, in strong contrast of light and the complex environment of high contrast, P (Program AE) block, the picture is often far from satisfactory, the effect is not the best. .Then those who need to take the appropriate equipment manually adjust the exposure parameters, which is the exposure compensation EV (expose value). .Tips: Photography equipment, metering based on the human eye through the stable value of ambient light to adjust the pupil size, and 18% of our daily lives in the gray scenes is the average light value in the human eye pupil is also within the adjustment range .can not reach this stable value, then the human eye will reduce the environmental recognition ability to judge correctly. .Photographic equipment is based on this principle to the calculation of the ambient light, the camera immediately after completion of the half-press the shutter on the light measurement, calculated by the program automatically adjusts the aperture, shutter speed, ISO value to wait for the next step. .Simply put: "Program AE" on the photos you shoot bright objects, dark objects can show 18% of the gray tones. .Colleagues in the eye, as in the ambient light outside this value, the camera can not properly in the film / CCD on the correct expression. .Second, exposure compensation, exposure compensation method, the adjustment means a lot, generally have flash, photography light reflector of exogenous light compensation; adjust the aperture value, exposure time of the flux parameter compensation. .These types of compensation method above, in the strict sense should be classified to the "compensation or light exposure control" concept to go. .There is the EV adjustment of compensation. .Exogenous flash of light like the light compensation, in the absence of other light sources make the case more rigid fill light, often in the background of the subject was the shadow of the left, while your subject will lose part of the high level of reflection, distortion .serious, rarely used. .Photography lights can create a good shooting, but because of conditions, often limited to within the studio. .Effect of soft fill light reflectors for small scenes portrait class photography are widely used, commonly used in the subject's face fill light, its limitations are obvious. .Aperture and shutter flux parameter adjustment, often due to the need to consider depth of field shooting, as well as factors moving objects, the actual use of the feeling there would be stretched. .The equipment is now in terms of popularity, the most commonly used is the EV adjustment means to achieve the purpose of exposure compensation. .Most consumer digital cameras have ± 2.0EV adjustment range, high up to reach some of the DC ± 3.0EV. .Test of one of the indicators of a DC is its manual adjustment function, while in the EV adjustment to adjust the precision is also a more important factor, the average level of 0.3 or 0.5. .The smaller differential more to meet the photographer's creative intent. .Tips: surrounded by a number of high-end metering mode DC offers a new metering mode: surround metering, metering is surrounded by the so-called camera after exposure in the calculation of normal, respectively, plus or minus a grade exposure being .photo shoot more than objects, to obtain photos of different exposure, which in fact is the EV exposure compensation was programmed automatic settings, to streamline the manual function, is conducive to immediate capture. .Third, the exposure compensation in terms of the proper use for beginners, exposure compensation, generally used for still life, landscape shooting occasions. .The occasion for you to adjust the parameters calmly, take a different compensation value more than the film, choose the best work out. .The correct values to adjust EV: In a typical scenario due to exposure (the area highlights many objects, such as backlighting, light under the water, snow, sunrise and sunset scenes, etc.) using the EV +, the typical overexposure in the scene (objects, dark areas .more, such as dense forest, the shadows of objects, close-up of black objects, etc.) using the EV-. .Simple layman's terms is "white with black cut, light plus dark reduction." .Note that the DC terms of P block or S / A Dangxia, when adjusting the value of EV, the camera aperture / shutter will have a corresponding change in parameters: P Dangxia EV adjustment, the camera aperture, shutter will do .the automatic adjustment; A Dangxia aperture fixed, EV adjust the shutter speed will be linked to changes; S Dangxia shutter fixed, EV adjustment will be linked to changes in aperture size. .But the aperture, shutter speed changes do not affect the final image after the exposure compensation effect..