[Ericamark3]

各位C HING 你們好, 我先幾日用枝鏡日光日白約下午5:00 左右,當時天色仲好光下在尖沙咀影過對邊海, 我用枝17-40 在最任何焦段,以無限遠對焦時,發現對焦好困難, 你們有如此經驗嗎?

[Obi-Wan]

u have to focus something that has contrast difference, e.g. building, mountain. BUT when u focus on the sky, unless there are clouds, u usually cannot auto focus

[jsklee]

use multiple point focus pls.