[肥仔唛]

我未用過定焦鏡頭，系唔系一定要前後移動先能夠準確對焦？咁唔系好唔方便。

[tam_dominic]

Use manual focus ring or let the camera do auto focus
"前後移動" is simulating the zoom :-)

[肥仔唛]

講X錯咗添，系前後移動=變焦？

[man1492]

都話明"定"，仲邊有得變?

[williamhychan]

簡單來說!!你個人唔可以做懶鬼!!

一般Zoom鏡影人,你可以企遠點,再Zoom埋主體影

做到~~全身/半身/Close Up!!


但定焦!!

就要靠你個人和主體相隔距離(行前行後)

先做到~~全身/半身/Close Up!!

[E300]

咁定焦的功能是什麼?為咩要用定焦鏡?

[Shaq2003]

定焦鏡o既質素好過變焦鏡
定焦鏡要"人肉變焦"

[Omega]

定焦鏡結構簡單﹐鏡片少嘛﹐光圈通常又大D﹐梗係好D啦。

[小小生]

我用變焦鏡時個人一樣會前後移動,唔同焦距有唔同效果

[hsc]

定焦鏡仲有
重量輕
size細
光圈大
filter尺寸細(filter都吾平啊)
的好處

[simonsun01]

就要靠你個人和主體相隔距離(行前行後)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
do you mean i need to walk 300mm away from the model
if i use 300mm prime?

[Round]

do you mean i need to walk 300mm away from the model
if i use 300mm prime?

Sure, NO. 300mm is just about 12 inch. The lens plus the body is already about 12 inch, you sure need to stand a lot further away!!! 300mm is the focal length.