light-meter-compensation

用户遇到曝光不准（雪景拍成灰色、逆光人像面部全黑）、问"测光表怎么用"、 或面对高反差场景不知如何曝光时调用。不适用于光圈快门创意选择 （应调用 exposure-dual-control）或胶片宽容度理论查询。 Invoke when the user faces incorrect exposure (gray snow, black faces in backlight), asks "how to use a light meter," or doesn't know how to expose high-contrast scenes. Not for aperture/shutter creative choices (use exposure-dual-control) or film latitude theory queries. 关键 trigger / Key triggers: "雪景发灰"、"逆光曝光"、"测光表不准"、"18%灰"、 "light meter"、"exposure compensation"、"backlit portrait"、 "high contrast scene exposure"、"why is my snow gray"、"18% gray card"。

by @bianchunhui·MIT-0