请教高手为何 F1.8 的Lens在 F2.8-F3.5 最 Sharp# PhotoGear - 摄影器材
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今天拍了几张远距理的风景照,用了不同的光圈,F1.8, F2, F2.8, F3.5, F4, F5.6,
and F8. 发现 F8 is the worst, F1.8 and F5.6 are the 2nd worst. The best is
around F2.8-F3.5 in terms of sharpness.
请教高手 为何是这样 ? 有何理论解释 ?
and F8. 发现 F8 is the worst, F1.8 and F5.6 are the 2nd worst. The best is
around F2.8-F3.5 in terms of sharpness.
请教高手 为何是这样 ? 有何理论解释 ?