The definition of exposure is: the canon eos 350d battery light intensity of light effect by time. According to the definition of exposure, if you want to achieve some degree of exposure, the strong light, the greater the exposure test drive you more short, light intensity is smaller, the longer the time exposure. If the light of mild double, and exposure time needs to reduce half, if the light intensity to 2, and time is 4, the exposure is 8, if the light intensity is 4, time is 2, the exposure is still 8. Appropriate exposure metering is based on the right.canon eos 450d battery
Digital camera with traditional camera same principle chart. In general, it with 185% the amount of reflective of metering gray for standard. But the actual shooting, often there will be some deviation, and many times to the photographer for exposure compensation. Filming the darker objects, can reduce 0.5 ~ 1 to block of exposure; Shooting black object, to reduce 1.5 ~ 2 against the exposure; Similarly, the shooting light color, be about to take into consideration the dominant object increased by 0.5 ~ 1 to block the exposure; Shooting close to white or white object is to increase by 1.5 to block even exposure, or 2 block is hard to get the real white canon eos rebel t1i battery
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