如何在低光下拍攝清晰的照片

dswhkg

在這討論交流一下:如何在低光下拍攝清晰的照片.

在昏暗房間拍攝時, 獲得清晰的照片的概率是有作下降的, 究其原因可歸納為以下幾點:
1) 手震. 這就要注意持機的姿勢; 查看"防手震"功能是否開著; 是否有安全快門速度(快於 1/(焦距));
2) 房間的光線不足, 相機的自動對焦準確性就會下降.  解決辦法有:
  - 增加亮度: 開窗,開燈,叫囡囡持手機作為對焦目標
  - 開"對焦輔助燈"(部份相機可能沒有這功能);
  - 插外閃,因(部份)單反是利用外閃作對焦照明;
  - Upgrade去更專業的機型; 這點有D癈話!
3) 景深太短: 這情況最容易出現在單反+大光圈定焦鏡. 用DC的就冇這個問題. 例如,我用30mm, f/1.4, 距主體一步的距離拍攝大頭照的話,景深只有3-4cm; 用50mm f/1.4的話,景深更只有 1.5cm! 即是對焦model的左眼的話,右眼即會脫焦了. (見咐圖例子)
在這情況下,若用"先對焦,再構圖"的方式,就容易對錯焦了. 要用自選對焦點的方式,鎖定model 眼睛對焦. 當然亦可適度的收細光圈以避免景深過短.
4) 鏡頭與機身不配合,發生移焦現象. 這只在單反機用phrase different方式對焦時發生(即m4/3機冇這個問題). 要去"Cal"鏡或用機身的微調功能校正.

我現在約有20%是blur左, 失敗率都幾高, 還有其他原因嗎?  歡迎交流.

windcatyin

Thank youD60 35mm 1.8 ok 媽？

windcatyin

Thank youD60 35mm 1.8 ok 媽？

dswhkg

windcatyin 發表於 2011-8-5 01:18
Thank youD60 35mm 1.8 ok 媽？

Though I don't have both D60 & 35/1.8, but I think this combo is good for hotel girls shooting.

35mm x 1.5 equal to 50mm in 135, is a standard lens, can cover most of the shooing situation. Though a bit long in small hotel room, but this lens has very high performance/price ratio, worth to have it.

wh2003

Thanks for your useful information Ching

賴昌星

但已經影得錯啦！

20082007

useful information thanks ching thanks

gmen75

Olympus, Pentax, Sony SLRs have stabilization built-in, so any lens is stabilized.  Much more capable indoors than Canon and Nikon.  

dswhkg

回應 gmen75 的帖子

Lens base stabilization is more effective in tele-lens.

However lens base stabilization has some dis-advantages:
- more expensive: have to buy this feature for each lens;
- some lenses(usually short focal length lens) don't have this feature, but sensor base is always available;

But I won't change system for this feature

newyorkboy

多謝師兄分亨

imsheng

一切都系因为光线唔够！

ytlai

Good very good. 請繼續努力,

onefouronefans

回覆 dswhkg 的帖子

thank you~~~~~~

165354

多謝分享!!

dicky520

多謝師兄指教!!

kkmika2006

好pro
我發覺我用緊呢部...唔夠光.....係.......
搵唔到焦..........連必一聲都冇...唔知咩事......

dswhkg

kkmika2006 發表於 2011-9-26 10:25
好pro
我發覺我用緊呢部...唔夠光.....係.......
搵唔到焦..........連必一聲都冇...唔知咩事...... ...

Yes, some camera (especially those low end models) have problem on focusing while at dim environment.

Does your camera have "focus assistant lamp" (對焦輔助燈)? If has, switch it on.

kkmika2006

dswhkg 發表於 2011-9-26 11:03
Yes, some camera (especially those low end models) have problem on focusing while at dim environme ...

已經解決 ,原來係鏡頭犘打問題 @@
用手對就ok

dswhkg

kkmika2006 發表於 2011-9-28 09:01
已經解決 ,原來係鏡頭犘打問題 @@
用手對就ok

"用手對就ok"
mean no AF function? Better find CS to fix it.

j0j0

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