[vickycheng]

1.景深問題有很多時是取決於鏡頭的質數和設計
2.感光元件的大小和景深無關
.
唉！
估唔到 DSLR 流行 o左 咁耐都仲有人咁 "on 居"！
.
如果想知詳情，
自己 cick 去睇 o下 啦！

http://www8.discuss.com.hk/viewthread.php?tid=3144950&extra=&page=1
.
呢條友----->>> WJJ2046 真係好可憐，
難得有一版友---->>> edithcayenne 能細心詳解比佢知，
但佢都係唔領情！

[beancurdbean]

仲有好多人以為 crop factor 要x1.5/x1.6 係因為鏡頭

[icekinhk]

我之前都被誤導過, 話用一支鏡, 用o係aps-c 景深會淺過ff, 因為crop factor, 不過好快被指正了。我都唔明d 人點解咁鍾意死撐.....

[chris_kts]

wa....wjj2046..... super ging !!!!!

[Obi-Wan]

DSLR 片幅 大過 DC 片幅 而可產生淺景深????? really?

[Obi-Wan]

http://www.photozone.de/3Technology/demos/depth.htm#

any factor related to sensor size????

(if u use DOF calculator, u get dof dependent on sensor size, because the author change the parameter ---- cicle of confusion)

[chris_kts]

Yes, as per dpreview,

"Depth of field (DOF) is a term which refers to the areas of the photograph both in front and behind the main focus point which remain "sharp" (in focus). Depth of field is affected by the aperture, subject distance, focal length, and film or sensor format"

DoF really got something to do with sensor format. That's why full frame cameras got a shallower Dof then cameras with a crop factor :)

More on http://www.dpreview.com/learn/?/Glossary/Optical/Depth_of_Field_01.htm

[beancurdbean]

景深4因素 --> 光圈, 實際焦距, 距離, CoC

如果要影同一構圖, 大片幅比細片幅會:
1) 加實際焦距; or
2) 減距離

所以大片幅會有淺景深

[wingli123]

條2046成日都塭交嗌嫁。

[小班長ErikoB]

.景深問題有很多時是取決於鏡頭的質數和設計
------------------------------------------------
if鏡頭係設計係包括埋光圏大小ge話 e點都可以叫成立 ge.....

[loskbarr]

問:

CANON 30D+50 f/2.8
CANON 5D+80 f/2.8

企同一位置, 影同一個主體...景深是否一樣?????

[beancurdbean]

30D + 50mm f/2.8 大約係 5D + 80mm f/4 景深

[loskbarr]

我問係咪一樣..如果一樣..就代表2046錯, 而且ff不是影響景深lor...

[eedbt]

5D+80 f/2.8 景深比 30D+50 f/2.8 淺

[老叟]

今日的我,打到昨日的我,有乜出奇??有咩好拗????