后者f4则是全开光圈,这些参数才刚开始爬坡,差了两档。24-120的锐度巅峰起码要f6.5-7.1才有指望。
后者f4则是全开光圈,这些参数才刚开始爬坡,差了两档。24-120的锐度巅峰起码要f6.5-7.1才有指望。
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