The before issue we talked about the histogram, how to identify the histogram, how to determine underexposed and overexposed and could be the high light and shadow to adopt overflow. In short, the period comes after the shutter is pressed, how do we magistrate the exposure. In this issue, we speak about the shutter is pressed ahead or later a problem discovered how to control exposure exposure.
[how to]
exposure compensation using a digital camera traits automatic or semi-automatic exposure, many human are accustomed directly by machine measured light exposure table. Machine measured the light table does not kas long aswe must shoot someone bright or dark entities, it ambition measure it as a reflection of entities among the 18% gray, then give us a result. Measured in accordance with machine table gives exposure combination of light shooting, entities ambition be shot gray ashes, making light of things will be ashes,
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will reduce exposure and more exposure, less will darken the photo. If the table by shooting light machine measured the dark things, such as our last issue in the environment of black shot dark records, and then you get a gray backdrop gray of this - and more exposure. Reduce the exposure to darken photos, black gray background, and record this also black. Less exposure will increase exposure, plus exposure photograph is clarified. If the light measured in accordance with machine taken off the table things, such as the pearly background of shooting a pearly notebook, then get a gray background gray notebook - less exposure. Increased exposure brighten your photos, gray background white, and record this also white.
This is the exposure compensation, the famous It has two meanings: one is the highlighted part of the metering range is larger than the shadow part of the zone,
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know the and or the minus, the problem to be solved is how much by how much. Previously looked a table,
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the an we know how to use the camera's histogram to determine exposure, exposure amends to send it more intuitive and accurate root. Exposure of extra,
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every camera exposure compensation operation is assorted, you can read the camera direction manual well to familiarize ourselves with the variety of camera automatic exposure compensation action.
[our digital cameras test exposure is biased? ]
Complexity of modern digital cameras, no one can certify the measured exposure of each camera system is not offset. To this end, a number of models have appeared in fine-tuning exposure settings, like the peel on the fair equilibrium feature, the arrow to return the correct Without this feature digital cameras, we need to memorize that the test results, manually adapt the shooting.
. This is a little more right! However, if we know the camera exposure dimension error is the amount of at fewest two advantages: 1, respective to the appropriate exposure accumulated experience; 2, the error is also large to know to mend station conservation. So how quickly and easily evaluate and test the camera exposure error amendment do? We recommend that you buy the camera to do about this test:
1, the camera sensitivity is set by a nailed worth on and choose a metering mode, exposure compensation is set to naught.
2, come up with reflectivity of 18% gray panels on the uniform lighting conditions.
3, so full of gray ash board camera viewfinder.
4, the camera's focus mode dial to manual mode, aimed at infinity focus.
5, reception the shutter, and then view the histogram. If the histogram shows the distribution of pixels is not chief, then measuring the digital camera exposure system error.
6, whether a digital camera there is a delicate misdeed of measuring exposure system, exposure compensation can be set up to re-shoot the pixel histogram shows the delivery of returns to the megalopolis, the compensation quantity is the amount of camera error.
7, change the metering mode,
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8, reiterate tread 5 to change the sensitivity.
] [how to choose the alignment of exposure
a glass under the tap water linkage. Half of the tap open, 40 seconds then full cup of water; tap entirely open, only 20 seconds the cup was filled. Faucet open gate the size and time of prologue the gate is to control the amount of water into a pair of combinations. Filled the same glass of water, tap to open the bigger, the less time necessitated, the more small taps open, the longer the time required.
light like pat water, the lens aperture diameter of the gate favor the tap size, curtain speed like this width of time the gate opens. Aperture diameter to open the bigger, the curtain open longer into the lens the more.
control the lens aperture size is the We can use many combinations of aperture and shutter to get the same exposure. So, in so many combinations to choose?
we talked almost in before period and the depth of field control technology to arrest moving objects, these two techniques involves the use of aperture and shutter. If we want to get the lusted depth of field, aperture size can be considered to select the combination of exposure, this is the so-called objects play a premonitory character, you can first think the combination of shutter speed to select the exposure, which is phoned Program AE (P) is given automatically by the camera is a combination of exposure. Both aperture prerogative, shutter priority or program exposure, allow us to change the exposure by control of the camera combination. Therefore, these automatic, semi-automatic exposure mode and manual exposure (M) is not different, just to make us faster and easier way to operate it.
For apprentices, we suggest using manual exposure (M). Practice using manual exposure, not because that would see cool, yet to let beginners familiar with the aperture and shutter combination of this exposure, more importantly, through the training manual exposure can develop in the digital outlook finder and the potentate habits. A couple of numbers is the combination of exposure, meantime the ruler is the machine measured the light reflected in the table.
[bracket]
film epoch, bracketing a twin intention. First, the quick shooting to heed to the accuracy of the exposure, the use of bracketing exposure can help us obtain a relatively accurate picture, of course, this also manner that possible wastage of opener moments; second, not sure while the exposure is accurate, the use of Bracketing which can ensure a relatively accurate exposure.
digital camera era, we have maintained the first role, that is always rapid shooting time to view the histogram, using the bracketing exposure can help us gain a relatively accurate picture. For film times bracketing the second achieve, because the histogram, so if there is time to retard it, we do not need to go to bracketing.
However, digital cameras, there is a quite major technique to use to exposure bracketing. That is what we in the If the scene is very bright and very dark parts beyond the scope of the camera can record, then only one exposure of the photo must overflow. If we want a very bright and very dark parts are the elaborate conservation, we need a
camera may reason a slight displacement of the dramatic addition in the amount of post-operation, even with high-performance personal calculator, it may arise curious because the image and come to nil unless we try to play. Therefore, the use of touch the camera to lessen the digit of times. In that row 9 bracketed HDR shot to complete a camera, in maximum cases, we basically do not need to touch the camera.
camera to record the scene when the brightest and darkest areas, we can also use Many of the details, so that photos look beauteous.
shot using the HDR technique, make sure the same aperture, shutter speed that is only through the regulation of way to different exposure. This is done to change the aperture depth of field will not change.
[How simple determination of the dynamic range of digital cameras]
we absence to understand the camera's dynamic scope. In many cases, this can aid us immediately resolve if a colossal light than the scene appearance the camera range of records, and which part apt reserve the details of the culling alternatively the choice of whether to adopt the HDR technique. Rough decision of their dynamic scope camera tool namely quite easy, equitable a gray board. As follows:
1, the camera sensitivity set at a firm value on and select a metering mode.
2, the reflection rate of 18% of the gray panels on the uniform lighting conditions.
3, so full of gray ash board camera viewfinder. The camera's focus mode dial to handbook mode, aimed at infinity focus.
4, weighed in accordance with the light meter reading machine 1st shot.
5, refer to the first photos of the exposure, successive depress exposure until the histogram on the left completely overrun, recorded to dwindle the exposure of the array.
6, with reference to the first photos of the exposure, successive increase in the exposure until the histogram on the right completely flood, increase the exposure of the series record.
7, will increase exposure and reduce the exposure of the series together is probably your digital camera's dynamic range.
8, change the camera sensitivity set to repeat steps 4 through 6. In the same digital camera, normally, when tall sensitivity dynamic range than the cheap sensitivity of the dynamic range slightly lower.
[Conclusion]
With the development of technology, new photography will be emerging, some of the antique technology will be replaced, and the photographer, the most based technology we call the elementary skills, these shots of current technologies is difficult to replace. The new annual is approaching, we wish you entire in the new year by studying to main the old and new technologies for more photography tips! Would like to ascertain more pleasure through photography! Pick up your camera, start shooting it!
Accurate exposure a {computer} {ambition} be a dig
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