[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

变焦卡片机的长焦端光圈通常收缩至F2.8-F4.5,虚化和进光量远不如广角端的F1.8;若主要拍人像虚化,选固定大光圈定焦(F1.7-F2.8)比选变焦更实际

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