How apt use the digital camera exposure compensati

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 via the exposure compensation to alteration this male obtained a metering shutter speed. Plus exposure compensation (plus exposure) is the shutter slows down, because to narrate the machine to obtain more exposure, in the case of constant aperture, to increase the amount of light through, so to cut back on the shutter; the other hand,Lacoste Canvas Trainers, less exposure is the shutter speed scale up, the camera metering adjustments based on amount of exposure of the shooting scene, but because of uneven delivery of logging the sunshine of the object may occur, for instance, took in the bright background of the characters before the backlight photos,Lacoste Carnaby Trainers, leaving folk exposed deficit. 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 period there is no concept of exposure compensation, because the handbook curtain speed and aperture size are set along us. Only when the 2 parameters of exposure (shutter speed & aperture size) in anybody 1 of the auto metering by the camera system to determine the time (AV automatic metering based ashore the result of contingency to make sure the shutter speed, TV stalls camera metering based on the results automatically to determine the aperture size, P files automatically while the camera metering based aboard the results of the alignment 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 is not the best effect of the automatic metering,Lacoste Shua Lace Trainers, or the subjective outlook that is not the best photographer, the human subjective rectify it.
c Portrait photography exposure wage required below 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, suitably increased exposure. When exposure compensation, if the photo is too dark, to increase the EV value, EV value of 1.0 for every appended, 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 personas 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 prejudiced towards the heart, white is the main misconception that the environment will make the camera quite bright, so underexposed.
3, when we were shooting the picture in a large zone of ​​dark or light areas, and the characters face in the picture only a small proportion, such as the average exposure value won metering exposure, the result figure The face is the absence of exposure is not overexposed. At this time we should on the foundation of the average metering Exposure Compensation to do.
4, when our pictures of people with too much background light ratio, principally in backlit portraits, the camera's automatic metering sometimes make the bad response, resulting in the exposure of peccadilloes. Then use the camera's automatic metering, it may be taken by the target, on average, this figure is possible 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 specimen
1 Exposure compensation unit is Ev. The exposure time, usually the shutter speed (T) and aperture (f) a combination that is immediately unified with the Exposure Value (EV, Exposure Value) said. EV is an contraction of English Exposure Values, is a reflection of how much the quantity of exposure, which was originally defined as: when the sensitivity is ISO 100, aperture coefficient of F1, the exposure time was 1 second, the exposure is defined as 0, a reduction in exposure 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 = enumerated 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 alter models show assorted correction methods:
A P file in the agenda mode, we asked if the increase in EV additional exposure, the camera will be the internal electronic perimeter 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 method to stretch the shutter time, reduce the EV is to shrink the shutter time.
C Tv file in the shutter priority, an increase in EV is equivalent to increase the aperture, the opposed is to reduce the aperture.
D M files in the whole manual, because the aperture and shutter settings by the consumers themselves, the exposure compensation does not exist.
mainstream digital camera's exposure compensation sub-file apt be more cautiously,Lacoste Finham SPM Trainers, the interval namely 1/3EV, so there is -2.0, -1.7, -1, -1.0, -0.7, -0.3 and +0.3 , +0.7, +1.0,Lacoste Swerve Trainers, +1.3, +1.7, +2.0 and so a absolute of 12 levels of compensation amounts.
Figure 1 based on the increase in the original metering 0.5EV exposure (half block), the main intonation improved
Figure 2 based on the increase in the incipient metering exposure 1EV (1 stop), the cardinal correct rendition
Figure 3 based on the increase in the original metering 2EV exposure (2 block), the main exposure over


employing fewer 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 determination or in our heads, along to the tangible location and the subject needs, flexibility, flexibility is the ultimate goal.
V white with black hack
exposure compensation conviction,Womens Lacoste Arin Trainers, we generally follow the If there is a colossal pearly screen with lights and additional special objects or shine objects, it is necessary a corresponding increase in exposure; if the skeleton has a colossal dark thing, will have to decrease exposure. In general, likened to the average situation in the light under the camera's automatic metering and exposure more accurate, but in the light and dark contrasts are often not granted when the automatic exposure, so exposure compensation manually.
predominant white screen, that is also 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, always the camera's metering system is not in any case the meter is accurate.
methodology is . Scenes in the uneven light, if the metering range is highlighted at the (White Division), the camera's metering to the value of the premises, as the medium point of the scene brightness, resulting in less exposure of the whole screen obscure, then should be fitting to increase the EV (Barker), increased exposure, you can make the correct exposure photographs. In contrast, the same uneven lighting scenes, if metering scope is the screen (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 transmit Low EV (black minus), to reduce exposure to the normal photo shoot. Figure 7


six bracketing (also understood for exposure brackets, stepladder exposure)
manually set exposure compensation in increase, we have a more convenient way, you can also preset by the digital camera in consensus with the EV value of their own to complete, it is function. Is a burst of 3 or even by three times the shutter. These three, the 1st is a normal exposure, the second is underexposed, the third is overexposed (in that order can be set.) Thus, this three in one is all right, always there to ensure a loyal exposure of the photographer's aim. . Figure 8, Figure 9, Figure 10. Siege-style shooting in the set, first set of steps approximately EV. This amount of exposure is the inconsistency 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 handy and rapid. Of lesson, if there should be a number of steps, have by a mini experience. We can test several times to the different steps of change. Bracketing generally used in motionless or slow moving subjects, because more than one perennial shot, it is complicated to arrest the best shot chance to shake the body.


7 exposure memories lock (AE lock, AEL)
Some camerconsist in ... automatic exposure
locking apparatus, with the AE automatic exposure is short for automatic exposure control appliance for automatic exposure control when the human exposure, to assure that the main exposure of customary. 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 adapt 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, reception the AEL clasp to lock the measure perusing, passed on playback of the original combination by the focus. In this way, the camera's metering system will not be affected by other light interference, when the accurate exposure, then you can not have the exposure compensation.
8 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 call, filming LCD screen
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 phone, filming LCD shade
Figure 21 bracketing
Figure 21-1 how the bracketing function call, filming LCD screen
exposure memory lock
Figure 22 position in the body

on is for reference only! Xing Yahui 2009 Beijing