[wts310]

我第一次用定焦鏡，小弟想問問我用F1.4先半按快門對住一件野，之後慢慢移開取景，為何影出來走焦???F1.4光圈太大唔可以用這方法嗎？
我仲想問問用F1.4時是不是要好小心對完焦少少都唔郁得??

[hkraymondccm]

冇師佰 師兄 師姐 0采你？等我試下：

唔好下下去咁盡，收番细少少光圈試試(唔知0岩唔0岩呢)。

[wts310]

沒有人答我!

[B and H]

您影乜東東??

[si-motion]

wts310:

This is becuase of the large aperture (f number) you are using. When using 1.4, the focus area is very "thin", just a slight difference in the distance will cause out-of-focus. This is why when shoot group photo or scenery, people need to use up to f8 or f16.

To fix the problem, either use manual focus or smaller aperture or if your camera support movable focus point, use that function to lock the focus.