[TyrusNg]

如題....有咩方法??
教教小弟

點用光圈,快門黎做??

thx!!!!!!!!

[tam_dominic]

有3個因素影響景深 :
===========================================================
景深 = 清晰範圍的大細 = 焦距(反比) + 物距(正比) + 光圈(反比)

1. 焦距 - DC的實質焦距很短(寫在鏡頭前端),
所以景深比單鏡機大 有利拍攝微距 不利拍攝背景模糊人像(細景深)

2. 物距 - 微距拍攝時, 物距很短. 所以用DC拍攝微距, 景深都會很細.

3. 超焦點 – 對焦在主體之前或之後, 但 清晰範圍(景深), 巳涵蓋了主體.

利用預校手動對焦 或focus lock 和 超焦點特性 :
a. 可以省卻對焦時間 作快速找拍.
b. 前移焦點以增加 背景模糊程度 和前景清晰度.
景深範圍計算 (Circle of confusion 0.019mm=模糊的一般定義):
http://www.tawbaware.com/maxlyons/calc.htm
==========================================================
2. 光圈 與 散景
光圈是在鏡頭 讓光線 進入相機的圓孔. 數字愈大光圈愈細
(ie. 1.8, 2, 2.8, 4, 5.6, 8, 11, 16, 22 …. 每大一級 多一倍光量)
最佳光效的光圈 是 該鏡頭最大光圈 減 2至3級 (eg. 最大 F2.8 用 F5.6)

細光圈 (F16, F22) 光點會呈放射狀, 像加了 星濾鏡片
大光圈 (F1.4, F2.8) 焦點外的 :
光點 - 會呈 光圈的形狀, 如心心鏡, 波波鏡(反射鏡)
景物 - 會化開 是謂散景(bokeh)
散景可簡化背景, 以突出主體. Eg 人像
(請參考 “景深” 說明)
==========================================================
7. 我部 DC，調校大光圈都拍不到細景深！
==>景深 與 焦距 成反比 (請參考 B.景深)

一般要影 細景深半身人像 至少 要焦距 50 mm 光圈 F2.0

Canon G10 只有 6.1mm (F2.8) – 30.5mm (F4.5)
Panas.LX3 只有 5.1mm (F2.0) – 12.8mm (F2.8)

如非微距拍攝, DC 做不到單鏡相機的細景深效果
...................
=========================================================
以上節錄自 "攝影基礎訓練" notes, 歡迎索取

Happy shooting !

[sl132]

TyrusNg ching, 有沒有"攝影基礎訓練" notes,如沒有,請Tam Sir email一份給你,很有用! :D :D :D

[onjo3]

i make it simple then...
shutter not effecting it.

u get more closer to on focus subject, background will getting blur becoz of the distance between the subject and background.
u can still make the background clear when u adjust the aperture smaller,
like f/11, 16, 22....

but remeber never try to make it when the background and subject are SAME DISTANCE with ur cam, u will never make it.

HINTS : depth effect = distance with suject and cam, suject with background, and aperture.

[GoIchiBin]

hi,
係唔係有"攝影基礎訓練" notes, 我都係初哥,都想要一份, 可唔可以send埋比我呢?? thanks~~~~

[GoIchiBin]

hi,
係唔係有"攝影基礎訓練" notes, 我都係初哥,都想要一份, 可唔可以send埋比我呢?? thanks~~~~

[pingusunny]

用大光圈or用距離，快門做唔到淺景深。

[lokism3]

A bit more advance tip for you.

1. Other than lens focal lenght, relationship between object & background; the size of "film" will do too. Bigger the image size, narrower the depth of field; e.g. a narrow DOF is easier to made in full-frame than APS-C; and

2. The clear zone in-front & beyond the focus plane are not identical. The zone in-front of the object would be a bit deeper than the beyond always.

[JEDI.]

hi,
係唔係有"攝影基礎訓練" notes, 我都係初哥,都想要一份, 可唔可以send埋比我呢?? thanks~~~~

[TOUZ]

我都係初哥....
想問師兄係唔係有"攝影基礎訓練"可以E埋畀我嗎??
3q~

[mppmm]

hi,
Can you forward me the "攝影基礎訓練" notes, 我都係初哥,都想要一份?? thanks very very much

[plkc]

Hi Tam Sir,

Could i also have one copy of the "攝影基礎訓練" notes, i found mysef very interesting in photography recently. Want to have some basic knolewdge before investing in a DSLR. Thanks a lot!

[Wilson1129]

Could i also have one copy of the "攝影基礎訓練" notes too?

[Safish]

咁請問 G11 係咪都做唔到影人像清, 背景曚既效果呢? 唔該哂~~

[chihangkwong]

Can i also have one 攝影基礎訓練? Thank you!