The flash power calculation is also based on centre-weighted metering of the light reflected by the pre-flash.

闪光灯输出功率的计算仍然是根据预闪反射光的中心加权测量结果。

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So, if the ambient light is fair or bright, and you want to use the plain TTL mode, you should reduce the flash power by setting some negative FOLC to avoid overexposure.

因此，若环境相当亮，又要使用TTL模式，就需要设置负的FOLC降低闪光灯输出，避免过曝。

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It's not all touchscreen, though -- several buttons (controlling a pop-up flash, power, zoom toggle, and shutter release) are also part of the somewhat bulky build.

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Fusion-io is part of the Facebook and Apple megatrend (both are customers of Fusion) because they power the component flash and software.

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Multiple original equipment manufacturers are now reviewing and committing to the use of the faster, power-efficient flash drives, and he believes STEC's leadership position in developing those drives bodes well for their prospects.

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