Unverified83% confidenceTradeoffTime unknown
轻量光圈越大机身越重也越贵，f2.8比f4通常贵50%以上且重40%以上，日常记录和旅行f4性价比更高
1
Sources
83%
Confidence
Medium-term (~90 days)
Relevance
-
First Seen
Sources
Related Entities
Related Claims
Unverified恒定f/2.8光圈换来的是暗光能力，代价是重量翻倍（70-200 f/2.8约1.4kg vs f/4约0.7-1kg）和更高价格；日常旅拍长焦f/4即可，减负收益巨大82% similarUnverified显存越大越安全但成本陡增：专业卡A6000 48GB价格约为消费级4090 24GB的4倍以上，若项目场景显存需求<20GB，堆4090的性价比压倒性优于专业卡63% similarUnverified速度与价格：UHS-II比UHS-I贵2-3倍，若设备不支持UHS-II或不做高速连拍，多花的钱完全浪费，UHS-I的V30已满足绝大多数消费级需求60% similarUnverified旗舰模型每次API调用成本可能是轻量模型的数十倍60% similarUnverified推理档位从 High 到 Max 花费两倍多的成本但只提升 4 个百分点，High 是性价比最优的默认档位58% similar
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