Unverified90% confidenceTradeoffTime unknown
全开光圈f/1.8时边缘画质和锐度有一定下降，需要缩到f/2.8-f/4左右才能获得全画面较均匀的锐度表现
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90%
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Long-term
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Unverified全开光圈f/1.4时锐度明显不如原厂同焦段镜头，需缩至f/2左右才能获得较好的中心锐度，对画质要求严苛的用户慎选87% similarUnverified全开光圈f/1.8时边缘画质较软、有明显口径蚀和暗角，需收到f/2.8左右画面整体锐度才显著提升87% similarUnverified全开光圈时中心锐度可用但边缘画质松散，收缩到f/4-f/5.6后画质明显改善；追求全开边缘画质的需求应考虑更高规格镜头87% 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。83% similarUnverifiedf/2.8恒定光圈变焦的虚化和进光量约等于f/4定焦，若追求人像浅景深奶油虚化，应直接上85mm f/1.8定焦而非依赖变焦头的2.8光圈83% similar
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