Unverified90% confidenceDecision RuleTime unknown
如果预算有限且不追求f/2.8大光圈，Sony 24-70 f/4（如FE 24-70 F4 G）或24-105 f/4 G在焦段覆盖和性价比上更优；选GM II的核心理由是光圈大一档带来的虚化和暗光优势
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Unverified恒定光圈变焦（如100-400 f/4.5-5.6其实是变光圈，真正恒定如70-200 f/2.8）在弱光和虚化上占优，但重量和价格显著上升；日常旅拍变光圈超长焦更实用72% similarUnverified仅拍风光/建筑不建议购买70-200 f/2.8：风光多用小光圈且很少需要浅景深，f/4甚至变焦比更大的24-105更实用且更轻72% similarUnverified室内、婚礼、舞台等弱光场景优先选f/2.8恒定光圈，比f/4多一档进光量，配合机身可少一档ISO或快一倍快门，直接影响成片率69% similarUnverified极致轻量（35g）和超小体积带来的代价是亮度上限较低、续航偏短、散热有限，高亮模式下会较快降档68% similar
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