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。

youdao

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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