[wingho29]

大家好, 我用緊Canon 0既DSLR, 但當影大合照時遇到對焦方面的問題...
想請教一下各位朋友~

當我用自動選擇對焦點時, 影多人相時, 0係觀景器睇到係對焦對落某幾個人度....
但之後用電腦睇相就得0個幾個人清楚, 但有d 企前/ 企後既人就唔清楚

而當我用單點對焦時, 又唔知應該搵邊一個人去對焦好wor....總果又係對焦點0個個人就清楚...其他就唔掂

想請問各位朋友...
1. 影大圍相時, 應該點去做對焦呢?
2. 俾相機自動選擇對焦點好, 定係set 死用中間對焦點先好呢?
3. 點先可以影到學校官方畢業相0甘.....個個都清清楚楚呢?

唔該各位~

[tcfreeman]

focus on the mid-row, use a large no. aperture such as f8 or f11, and tripod, if possible + cable release

[wingho29]

THX

甘大家係常用相機自動選擇對焦點, 定係set 死用中間對焦點呢???

[JSmith]

都唔洗去到f8,f11，一般三排人用f7都好夠(我自己一般用f/6.3)，太細光圈ISO要推得好高。如果係室外日光日白就冇所謂~

對焦只用一點，多點對焦都冇乜用，景深唔夠就係唔夠。一般向中排人頭對焦

[wingho29]

thx~

但想問一下, 如果d 人0既企法唔係整齊0個隻....
姐係好似bbq 0個時d 大合照....
甘又有乜野方法可以解決有d 人樣走焦既情況呢?

[tcfreeman]

smith, agree with you, but some cases as wingho photo-mate said that it could be 4 rows or more, or side by side like a O or triangle, even ....... so f8 or f11 that is better
for me, i often use M and try to looking for a subject of mid, like a cake, or a bowl of shark fin soup etc., you known sometimes not always focus on a human, of couse, need more training, quick actions
hope can help

[JSmith]

係呀~ 有時真係好難所有人都in focus，反而DC景深冇咁淺，可能重會好過用DSLR。f8 ,f11都試過，不過真係日光日白先至得，室內唯有盡量推高ISO。
有時三幾個人斜排(啲人好多時鐘意咁影合照)，景深要好大，有時唯有唔覺唔覺咁行埋一邊影盡量將斜面減低。

好似bbq 0個時d 大合照....
有幾個做法，唔一定perfect，只係盡量
1. 冇辦法之下，選擇人群中間點做對焦(即係大家都唔會好sharp，只係權宜之計)
2. 自己企喺較高位置，相對將需要景深減少
3. 自己行後啲影
4. 用比較wide既鏡頭影，唔好影咁大頭
5. 有時可以叫人排返好啲先至影(當然有啲場合係唔可能)
6. 換部D700, D3 or 5D mark II 盡推ISO
7.唔好帶相機..................

[wingho29]

I'll try all the methods ga la ~

Thx JSmith and tcfreeman

[tcfreeman]

wingho mate,
try to borrow, buy, rent even stole a basic photography book, the details about DOF have shown very clear