[852]

好神奇， f 值越大光圈應該越細
但係我用眼去望住個光圈，
反而 f 值越大光圈應該越大

[Velsper]

佢係唔係佢影個下先縮光圈呀? ^ ^

[852]

唔係喎
我試過爆佢 10 秒
個光圈係冇細到架

[Velsper]

10秒?
你指影個時?
影時光圈不會變耶~

[852]

我試過用 f2.8 and f14 曝佢10秒
然後望住個鏡頭，比較之下
好明顯 f14 既光圈係大過 f2.8

[Velsper]

下? ^ ^000
小弟用相機(slr / d7)
佢會係影個下縮細個光圈.
未影時光圈處於最大狀態
你不如再看看吧~

[852]

係喎
真係 R 晒頭

[Pu239]

Steps of aperture for A40 is :
At wide it is f2.8 - f8.
At max zoom, it is f4.8 - f14
So, when you zoom the lens, the convex lens move backward and your eye will see a bigger aperture hole. Actually, we can only compared them without changing the zoom size !

[rocket]

係喎
有道理