Unverified85% confidenceTradeoffTime unknown
带长焦（24-200mm等效）的卡片机牺牲了大光圈，长焦端光圈普遍缩到F4.5以上，弱光长焦拍摄画质会明显下降；纯定焦或短变焦机型光圈更大更适合暗光
1
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85%
Confidence
Long-term
Relevance
-
First Seen
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Unverified变焦倍数越高的卡片机镜头素质和光圈越受限，大变焦机型长焦端光圈通常缩到f/4以上暗光乏力，画质党应选变焦范围克制但恒定大光圈的机型93% similarUnverified镜头等效24-100mm覆盖广角到中长焦，F1.8大光圈仅在广角端，焦距拉到长焦端后光圈收至F2.8，弱光下使用长焦端画质会明显下降。85% similarUnverified变焦范围与画质不可兼得：大变焦(24-200mm等效)机型为塞下长焦牺牲了光圈和边缘画质，定焦或短变焦(24-70mm)机型光圈更大、暗光更强84% similarUnverified为覆盖24-200mm大变焦范围，镜头长焦端最大光圈只有F4.5，暗光和长焦虚化能力受限，属焦段换画质的权衡84% similarUnverified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81% similar
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