Unverified78% confidenceCautionTime unknown
预算有限且已有f/2.8变焦（如24-70），不建议再买同焦段f/1.8定焦——虚化提升有限；此时该买画质/虚化差异大的85mm f/1.4或35mm f/1.4，或买更极致的f/1.2
1
Sources
78%
Confidence
Long-term
Relevance
-
First Seen
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Unverified腾龙28-75mm f/2.8 G2起始焦段为28mm而非24mm，广角端窄一些但换来更小体积和更低价格，适合以便携为主的用户74% similarUnverified如果预算有限且不需要F2.8大光圈，RF 24-105mm F4L IS USM焦段更实用、更轻且便宜很多；只有确实需要恒定F2.8浅景深或暗光性能才值得上这支73% similarUnverified标准恒定f/2.8变焦通常在700-900g，全天挂机+旅拍会明显加重负担；轻量化党可选28-75 f/2.8（约550g）或f/4恒定头（约500g以下）71% similarUnverified预算有限却想要高刷+高分辨率+大尺寸三者兼得不现实，34英寸WQHD 144Hz是性价比甜点，追求5K2K则须为分辨率牺牲刷新率或大幅加预算65% similarUnverifiedFP16格式下每个参数占2字节，INT4格式仅占0.5字节，理论上可实现4倍压缩比63% similar
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