Tshaj tawm yog lub sijhawm uas lub kaw ntawm lub koob yees duab qhib rau lub teeb ci ntsa iab kom ntaus lub qhov muag ua lub ntsej muag. Qhov tseeb ntawm qhov sib luag kaw yuav txiav txim seb qhov ci thiab ntshiab ntawm daim duab yuav ua li cas.
Cov Lus Qhia
Kauj ruam 1
Txoj kev yooj yim tshaj plaws los txiav txim siab lub ntsuas kaw yog kom lub koob yees duab ua nws. Tshawb nrhiav koj lub koob yees duab rau kev siv lub tshuab kaw hluav taws xob thiab hom aperture lossis hom aperture. Lub koob yees duab yuav xaiv qhov txiaj ntsig zoo ntawm nws tus kheej.
Kauj ruam 2
Yog tias koj tsis tuaj yeem siv hom pib, lossis koj xav sim nrog lub teeb, xaiv hom kev tuav lossis hom kev kaw qhov muaj feem. Shutter nrawm tuaj yeem ntev li ntawm 1/8000 thib ob mus rau infinity (nyob ntawm tus qauv koob yees duab). Txhawm rau kom txiav txim siab raug kaw qhov nrawm nrawm, nco ntsoov cov qauv tseem ceeb hauv cov teeb pom kev sib txawv.
Kauj ruam 3
Qhov kwv yees kaw qhov nrawm: 1/1000 - 1/500 - tua cov ncauj lus hauv cov lus tsa suab; 1/500 - tua ntawm lub hnub ci hnub ci; 1/250 - 1/60 - tua nyob rau hauv ntau lub teeb pom kev zoo (hnub huab, hnub ntxoov ntxoo, zoo-lit) 1/125 - tua nyob hauv chav tso duab yees duab; 1/30 - tua rau hnub huab, nyob hauv tsev; 1/15 thiab ntev dua - tua hauv qhov teeb pom kev zoo, yuav tsum muaj ib qho chaw txawb chaw.
Kauj ruam 4
Nco ntsoov siv cov shutter nrawm nrawm thaum tua cov hom phiaj mus. Piv txwv li, qhov no siv rau kev tua cov kis las, tsiaj, seev cev tib neeg, thiab lwm yam. Txawm li cas los xij, yuav tsum muaj lub teeb pom kev txaus kom paub tseeb tias cov khoom muaj qhov ntse thiab ci. Siv lub kaw qeeb qeeb thaum tua nrog lub kos nyob rau hauv lub teeb qis, lossis rau cov teebmeem tshwj xeeb (tso dej, txav, thiab lwm yam).
