Photo: Xing Yahui
model: Mr Fang, Juanzi, Shih-han
a What is the Exposure Compensation
exposure control exposure compensation is a way, that is, after metering through the fuselage on the subject, drawn from the parameters of the shutter and aperture combinations, and through the exposure compensation to change this man obtained a metering shutter speed. Plus exposure compensation (plus exposure) is the shutter slows down, because to tell the machine to get more exposure,
Monster Beats Headphones, in the case of constant aperture, to increase the amount of light through, so to slow down the shutter; the other hand, less exposure is the shutter speed speed up, the camera shooting the scene under the metering adjustment of exposure, but because of uneven distribution of recording the brightness of the object may occur, for example, in the bright background of the characters before the shooting backlit photos,
Beats Headphones, leaving people exposed shortage. Then you can use exposure compensation to solve such problems, the camera has exposure compensation can usually be +2, +1,0, -1, -2 and other adjustments, if the subject is underexposed, the use of positive compensation, increased exposure, Instead use the negative compensation, reducing exposure.
When we use the manual to shoot, this time there is no concept of exposure compensation, because the manual shutter speed and aperture size are set by us. Only when the two parameters of exposure (shutter speed & aperture size) in any one of the automatic metering by the camera system to determine the time (AV automatic metering based on the result of chance to determine the shutter speed, TV stalls camera metering based on the results automatically to determine the aperture size, P files automatically when the camera metering based on the results of the combination of shutter and aperture), there will be The The M file, the camera shutter or aperture is no longer involved in the set, they did not have the
b Why Exposure Compensation: Exposure compensation is to make up for the camera when shooting portraits metering is not automatically the best results, or the photographer, not the best perceived when the human subjective amend it.
c Portrait photography exposure compensation required under what circumstances?
1, shooting portraits of the environment than the dark, the need to increase the brightness, without any He Buguang tool, you can compensate for the exposure of the main characters, appropriately increased exposure. When exposure compensation, if the photo is too dark, to increase the EV value, EV value of 1.0 for each additional, equivalent to doubling the amount of light exposure, if the picture is too bright, to reduce the EV value, EV values decreased 1.0 per , equivalent to double the intake decreases the amount of light.
2, when we are on a white background environment or when shooting in white characters in the picture looks gray or white is not white, the need to increase exposure for exposure compensation, because the camera in the automatic metering when the subject is often biased towards the center, the white subject will mistakenly think the camera is very bright environment, and thus exposed.
3, when we were shooting the picture in a large area of dark or light areas, and the characters face in the picture only a small proportion, such as the average exposure value obtained metering exposure, the result figure The face is the lack of exposure is not overexposed. At this time we should on the basis of the average metering Exposure Compensation to do.
4, when our pictures of people with too much background light ratio, especially in backlit portraits, the camera's automatic metering sometimes make the wrong reaction, resulting in the exposure of errors. Then use the camera's automatic metering, it may be taken by the target, on average, this figure is likely to take out the background normal but the person's face darkened, when the need for volume.
d portrait photograph of change in the exposure sample
1 Exposure compensation unit is Ev. The exposure time, usually the shutter speed (T) and aperture (f) a combination that is now unified with the Exposure Value (EV, Exposure Value) said. EV is an abbreviation of English Exposure Values, how much is a volume reflect the exposure, the first is defined as: When the sensitivity is ISO 100, aperture coefficient of F1, the exposure time is 1 second, the exposure is defined as 0, exposure to reduce a file (the shutter or aperture reducing time in half a file), EV increases by 1.
+2.0 Ev = 4 times the exposure
+1.0 Ev = 2 times the exposure
; +0.0 Ev = calculated exposure
-1.0Ev = 1 / 2 times the exposure
-2.0Ev = 1 / 4 times the exposure
2 exposure compensation mode of a digital camera filming the amount of fine-tuning the exposure condition, and because of the different models show different adjustment methods:
A P file in the program mode, we asked if the increase in EV increased exposure, the camera will be the internal electronic circuit conditions according to the scene, automatically determines the aperture or increase, or extend the shutter time.
B Av files in aperture priority, increasing the EV means to extend the shutter time, reduce the EV is to shorten the shutter time.
C Tv file in the shutter priority, an increase in EV is equivalent to increase the aperture, the contrary is to reduce the aperture.
D M files in the whole manual, because the aperture and shutter settings by the users themselves, the exposure compensation does not exist.
mainstream digital camera's exposure compensation sub-file to be more carefully, the interval is 1/3EV, so there is -2.0, -1.7, -1, -1.0, -0.7, -0.3 and +0.3 , +0.7, +1.0, +1.3, +1.7, +2.0 and so a total of 12 levels of compensation values.
Figure 1 based on the increase in the original metering 0.5EV exposure (half block), the main tone improved
Figure 2 based on the increase in the original metering exposure 1EV (1 block),
Monster Headphones, the main correct performance
Figure 3 based on the increase in the original metering 2EV exposure (2 block), the main exposure over
employing less exposure as photos for an example
Figure 4 The decrease in the original metering 0.5EV (half block) exposure, the main tone improved
Figure 5 The decrease in the original metering 1EV (1 block) exposure, the main correct performance
Figure 6 The decrease in the original metering 2EV (2 block) exposure, the subject underexposed
So, the final decision or in our brains, according to the actual situation and the subject needs, flexibility, flexibility is the ultimate goal.
V white with black cut
exposure compensation principle, we generally follow the If there is a large white screen with lights and other special objects or bright objects, it is necessary a corresponding increase in exposure; if the frame has a large black object, will have to reduce exposure. In general, compared to the average situation in the light under the camera's automatic metering and exposure more accurate, but the contrast between light and dark is very large in the auto exposure is often not allowed, so the need for manual exposure compensation.
predominant white screen, that is too light metering system will automatically reduce the exposure value, so to be increased. Instead the screen is too dark, too dark metering system that automatically increase the exposure value, so be reduced. Therefore, all the camera's metering system is not in any case the meter is accurate.
theory is . Scenes in the uneven light, if the metering range is highlighted at the (White Division),
Dre Beats Headphones, the camera's metering to the value of the premises, as the middle point of the scene brightness, resulting in less exposure of the whole screen dim, then should be appropriate to increase the EV (Barker), increased exposure, you can make the correct exposure photographs. In contrast, the same uneven lighting scenes, if metering range is the shade (black base), the camera will take a value as a whole scene where the brightness of the mid-point, so the whole picture looked very bright overexposed, only transfer Low EV (black minus), to reduce exposure to the normal photo shoot. Figure 7
six bracketing (also known as exposure brackets, ladder exposure)
manually set exposure compensation in addition, we have a more convenient way, you can also preset by the digital camera in accordance with the EV value of their own to complete, it is function. Is a burst of three or even by three times the shutter. These three, the first is a normal exposure, the second is underexposed, the third is overexposed (in that order can be set.) Thus,
monster beats, this three in one is always right, always there to ensure a consistent exposure of the photographer's intention. . Figure 8, Figure 9, Figure 10. Siege-style shooting in the set, first set of steps about EV. This amount of exposure is the difference between the three the number of EV? For example, 03. Then the second shot is the EV =- 0.3, the third shot is EV = +0.3. Can also be set to 0.5 or 1.0. This approach is convenient and quick. Of course, whether there should be a number of steps, have by a little experience. We can test several times to the different steps of change. Bracketing generally used in stationary or slow moving subjects, because more than one continuous shot, it is difficult to capture the best shot opportunity to move the body.
seven Puguang memory lock (AE lock, AEL)
Some cameras with automatic exposure
locking device, with the AE automatic exposure is short for automatic exposure control device for automatic exposure control human exposure to ensure that the main Puguang normal. Use AE lock Note: 1, self-timer can not manually or use automatic exposure (AE) lock. 2, press the automatic exposure (AE) lock not to adjust the aperture size after. 3 Do not use with flash photography (AE) lock. This locking device with automatic exposure metering to be approaching the subject, when the subject is accurate metering, press the AEL button locks the meter reading,
monster pro headphones, passed on playback of the original composition at the focus. In this way, the camera's metering system will not be affected by other light interference, while the accurate exposure, then you can not have exposure compensation.
eight Nikon example Figure
Figure 12 Nikon D700 (or other Nikon SLR) of
Figure 13, exposure compensation,
Figure 14, how the exposure compensation function call, filming LCD screen
Figure 15 bracketing
Figure 15-1-2-3 how its bracketing function calls, shooting the LCD screen picture
Figure 16 locked in the body exposed position memory
Canon
example Figure
Figure 18 Canon 5D (or 50D, 40D) of the
Figure 19 Exposure compensation,
Figure 20 how the exposure compensation function call, filming LCD screen
Figure 21 bracketing
Figure 21-1 how the bracketing function call, filming LCD screen
exposure memory lock
Figure 22 position in the body
above is for reference only! Xing Yahui 2009 Beijing
民工深夜翻护栏被保时捷撞飞30米身亡 13681713577
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