Digital cameras easy to use, after shooting through the playback can immediately know the actual shooting, combined with post-contrast in color to adjust the computer, so there are many photographers in practice, the accuracy of exposure is not very attention, in fact, requirements for exposure using a digital camera is also very high, shooting practice with particular attention to the “exposure compensation” used in the shooting a number of special objects, but also to use their traditional photography experience, full use of exposure compensation to meet the specific circumstances of the exposure needs to ensure pictures are accurate exposure.
1. Why for exposure compensation
PANASONIC cgr-d54 battery Digital camera exposure metering system and traditional cameras, in dealing with images, there is a very basic guidelines, that is, all the subject are in accordance with brightness of 18% of the neutral gray to restore, so look at the camera’s light-sensitive system, No matter how the object is the original brightness, the brightness of the final should be a moderate tone display. Therefore, the actual shooting, the photographer still needs to shoot the scene according to the complexity of the situation to judge accordingly, is the only way to ensure good density and color reproduction.
Portable digital cameras are generally plus or minus 2 block large exposure compensation, use them to meet the most complex cases of shooting. As for some advanced single-lens reflex digital camera, exposure compensation to plus or minus 5 or even block to meet the lighting environment is extremely complex shooting needs. Dell Inspiron 1525 AC adapter Digital camera design and manufacturer of the reason for the design of the camera for such treatment, the act itself is enough to explain the exposure compensation on the photo quality is of great significance, is the main technical points can not be ignored. Under normal circumstances, the need for the use of exposure compensation, the photographer must take into account the following main aspects.
2. The subject is relatively high brightness is required for exposure compensation
For example, when shooting landscape photos, and if the contents of the blue and white and other light tones accounted for a larger Dell XPS M1530 AC Adapter area, it is necessary to consider appropriate increased exposure, increased by at least half-block along light, side light plus a block or so. If it is backlit, it is necessary for dealing with high and low position of the sun, while the performance of what you see, usually you want the details of the screen can also be appropriate in the performance, then we would be increased exposure of about 1.5-2 gear, the sun is more center of the screen, the more necessary to appropriately increase the exposure (of course, should also pay attention to avoid the strong sun light to prevent damage to the camera image sensor. If the sun did not issue a strong light, such as the red mist, Asahi sunset, etc. because of their low brightness, will not impact on metering, exposure compensation is not necessary to consider the issue).
In addition, in shooting snow, fog, landscape and other specific content, should be based on digital camera batteries performance to the last to show the characteristics of high-profile form, as appropriate for exposure compensation. Snow usually best to compensate for a blocked shot to the exposure half a block, or you end up with snow is not white, which may be due to insufficient light gray; Fog best shooting half-block to a block compensation exposure, or you get the tone dim view of fog near the night in general, is clearly not ideal.
There are like shooting a white stage, groups of people who wear white clothes, hospital or laboratory environment, high brightness, large area of the sky as the background of the aircraft rather special object, to be based on the relationship between subject and background for exposure is appropriate compensation.
3. Lower brightness of the subject to be negative for exposure compensation
In dealing with the subject of high brightness required for the exposure is compensated, mainly to prevent the SONY NP-77 Battery automatic processing of camera images for the lack of exposure. Similarly, shooting deep color object, you need to do the opposite, in order to avoid overexposure.
Typical city night scenes in the film, in addition to screen buildings, streets or other content of higher brightness occupies an area outside the main screen, to prevent excessive exposure has two main methods, one is to use spot metering to the main performance targets Exposure; Another way is based on the actual situation, the appropriate use of exposure compensation to reduce exposure. Usually in the footage (especially the sensitive parts of metering center of the screen) occupies a large area of sky, they often need to reduce the 2 block or more exposure.
In addition to shooting night, shooting the other landscape classes in subjects such as the dense summer shade, backlight state of the mountains would have to use the appropriate use of negative exposure compensation to reduce exposure. There are shooting people wearing black clothing, textiles, and other dark colors shooting, are required to reduce exposure may be given only to restore the normal tone. Because digital cameras are also the subject by measuring the reflected light to determine exposure in dealing with the low apparent brightness of objects photographer without a corresponding negative exposure Dell Studio 1537 AC Adapter compensation, the resulting tone will be neutral Huiying. Obviously, the apparent color is black or dark subjects dominated the final into a neutral gray tone of the picture is hard to accept.
4. Relationship between the subject and the background to be flexible when dealing with complex
This is mainly in two situations:
A. Background of high brightness, low brightness of the subject, to be positive for exposure compensation. This meeting people at the shooting often occurs, sometimes people sitting in the window, and launched into the sun behind the window, the background and the characters seemed more significantly dim light, then if not using flash as fill light, to be positive for exposure compensation, usually about 1 block to increase the exposure compensation, the NIKON EN-EL14 battery characters will significantly improve the level of the face. When shooting backlit portraits as well, if the background includes a large area of sky, water objects such as high brightness, but also by being compensated or use other form of assistance to improve the contrast of light, or will affect the reflection of the main characters . Even if the post by image processing software to brighten the figures, will be significantly affected by noise image quality.
B. Background of low brightness, high brightness of the subject, to be negative for exposure compensation. This situation often encountered in the photographic arena, usually one or a small amount of the stage performance by actors, in order to attract the audience’s attention, often using one or two chasing light shines on the people, and other background on the stage this time because not directly affected by light exposure, almost rendered as black, so a great contrast between the two, unless the performers right in the center of the screen and you are using spot metering mode, or be sure to make a negative exposure compensation, or prone to overexposure.
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