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Jacky00
註冊: 2005-09-07
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 多人對焦 Post time: 12 月 30 日 |
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各位好,
請教如果想影4~5人相, 對焦點應落在那裡?? Setting 應麼樣??
情況如下:-
A,B,C,D represent individual person
(1) (2) (3) (4)
A B C D
\ /
\ /
[DSLR]
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tyuen
註冊: 2005-11-07
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| Re: 多人對焦 Post time: 12 月 30 日 |
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The one at centre and adjust the aperture for large enough depth of field.
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Jacky00
註冊: 2005-09-07
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| Re: 多人對焦 Post time: 1 月 3 日 |
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Thx big brother
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tunster
註冊: 2003-10-22
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| Re: 多人對焦 Post time: 1 月 3 日 |
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我通常會對最後0個個...因為近0的 DOF 係深過遠0既...
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怪俠
註冊: 2004-12-16
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| Re: 多人對焦 Post time: 1 月 3 日 |
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乜唔係前景深會較後景深為短?咩？
請教！請教！
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tyuen
註冊: 2005-11-07
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| Re: 多人對焦 Post time: 1 月 3 日 |
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Well, my previous reply is too simplified. Anyway, I don't agree with tunster.
Jacky00, please check the depth of field table:
http://www.dofmaster.com/dofjs.html
Try to input some figures and I hope that you will get some more ideas.
For example, you're using 35mm film camera shooting at 28mm with aperture f/8. The four persons A, B, C, D are standing 3, 4, 5, 6 feet in front of you. Amend the subject distance in the chart to 3, 4, 5 or 6 feet to check the result.
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setfootin
註冊: 2005-12-16
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| Re: 多人對焦 Post time: 1 月 3 日 |
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"The one at centre and adjust the aperture for large enough depth of field"
是不是最小光圈的意思, 例如f22 ?
謝指道!!!
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Philippe
註冊: 2003-06-01
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| Re: 多人對焦 Post time: 1 月 4 日 |
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f22景深當然會好長,但你同時會面對其他攝影問題,例如快門變長,靠晒閃光燈冇晒現場光,產生繞射影響畫質等等.
何不唔用tyuen生提供的景深表check check幾多光圈先夠呢?
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Jacky00
註冊: 2005-09-07
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| Re: 多人對焦 Post time: 1 月 9 日 |
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Thx for all brothers, very helpful, thanks again.
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