[問題] 怎麼維持相同曝光度?
請問一下
假如在S模式下(快門先決)
我快門調1/8 ISO設200 得到一張照片
當我改變快門速度 變成 1/30 和 1/250時
ISO值各要設成多少才跟快門1/8那一張曝光度相同?
謝謝喔
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