Qhov Tseem Ceeb Qhov txawv - ISO vs Shutter Ceev
Lub koob yees duab ISO, shutter ceev, thiab aperture yog suav tias yog tus ncej ntawm kev yees duab. Qhov sib txawv tseem ceeb ntawm ISO thiab shutter ceev yog tias ISO txuas nrog rhiab heev thaum lub shutter ceev yog txuas nrog tus nqi ntawm lub teeb uas kov lub sensor. Ob qhov txiaj ntsig kawg cuam tshuam rau qhov raug thiab qhov zoo ntawm daim duab. Tus kws yees duab yuav tsum paub txog kev siv 3 lub ntsiab lus saum toj no kom paub meej hauv lawv txoj kev nrhiav cov duab zoo.
ISO yog dab tsi?
Lub ISO tuaj yeem raug xa mus ua ib qho ntawm peb tus ncej ntawm kev yees duab. Qhov rhiab heev rau lub teeb muaj peev xwm txhais tau los ntawm ISO. Qhov qis dua ISO, lub koob yees duab tsawg dua yog lub teeb, thiab qhov siab dua ISO muab siab dua rau lub teeb. Lub koob yees duab rhiab heev yog tswj los ntawm ib feem hu ua duab sensor. Qhov no yog qhov kim tshaj plaws ntawm lub koob yees duab thiab yog lub luag haujlwm rau kev hloov lub teeb rau hauv cov duab. Qhov nce ntawm rhiab heev tuaj yeem siv los ntes cov duab hauv lub teeb qis yam tsis muaj lub teeb, tab sis kev lag luam tawm yog tias, thaum nce qhov rhiab heev, nws yuav ua rau cov nplej lossis suab nrov ntxiv rau daim duab. Qhov no nyob rau hauv lem yuav ua rau poob zoo ntawm cov duab.
Lub hauv paus ISO yog qhov tsawg kawg nkaus ISO uas tuaj yeem siv los tsim cov duab yam tsis muaj suab nrov. Qhov no yuav muab peb cov duab zoo tshaj plaws rau tus lej ISO qis tshaj. Tab sis nyob rau hauv cov teeb meem uas tsis tshua muaj siv lub hauv paus ISO tsis yog ib txwm ua tau. ISO tus lej geometrically nce qib hauv cov qauv hauv qab no: 100, 200, 400, 800 thiab 1600. Thaum tsiv ntawm ib tus lej ISO mus rau ISO tom ntej, qhov rhiab heev feem ntau yog ob npaug.
Thaum tus nqi ISO qis, xav tau ntau lub teeb kom raug. Rau lub hom phiaj no, qeeb shutter speeds yuav tsum tau siv. Ntawm qhov tod tes, yog siv tus nqi ISO siab dua, yuav tsum siv lub shutter ceev uas yog qhov zoo tagnrho rau kev ntaus pob ncaws pob thiab yees duab sab hauv tsev.
Thaum xav tau kev txhaj tshuaj kom ntxaws, tus lej ISO qis tshaj yuav tsum tau siv. Thaum muaj teeb pom kev zoo, tus lej ISO qis yuav ua rau koj cov duab zoo tshaj plaws. Qhov no tseem yuav muaj qhov nthuav dav tshaj plaws hauv ib daim duab. Thaum tsis muaj lub teeb txaus, txhawm rau ua kom lub koob yees duab rhiab heev, ISO yuav tsum tau nce ntxiv. Thaum lub ISO nce, lub koob yees duab muaj peev xwm ntes cov duab uas muaj kev txav. Tus lej ISO siab dua yuav yog qhov zoo tagnrho rau kev yees duab sab hauv tsev kom ntes thiab khov cov lus tsa suab nrog lub kaw lus nrawm. Nws pib ISO feature teeb tsa qhov ntsuas ISO rau ib tus lej tshwj xeeb raws li lub teeb nyob ib puag ncig uas muaj. Qhov no yuav ua kom paub tseeb tias lub koob yees duab teeb tsa tsis dhau qhov siab tshaj ISO tus nqi thiab ntxiv suab nrov rau cov duab.
Cov ntsiab lus tseem ceeb yuav tsum nco ntsoov thaum xaiv ISO
• Thaum peb xav ntes cov lus tsa suab, txhawm rau txo qhov plooj, xav tau lub shutter ceev dua. Txhawm rau them nyiaj rau qhov siab dua shutter ceev, yuav tsum xav txog ISO siab dua.
• Rau kev yees duab dub thiab dawb, nce ISO thiab ntxiv suab nrov yuav tsis muaj teeb meem.
• Nrog rau kev siv lub koob yees duab, lub kaw lus qeeb tuaj yeem haum, yog li ntawd, siv ISO qis dua.
• Thaum nce lub aperture ntawm lub koob yees duab, nws tso cai rau lub teeb ntau dua rau hauv lub sensor. Yog li yuav siv tau cov ISO qis dua. Qhov kev teeb tsa no feem ntau yog siv thaum qhov kev xav tau tsis yog qhov tob ntawm qhov chaw.
• Nyob rau hauv lub teeb ci, qis ISO yog nyiam.
Shutter Speed yog dab tsi?
Shutter ceev kuj yog ib qho ntawm cov ncej ntawm kev yees duab nrog rau ISO thiab aperture. Lub shutter yog nyob rau pem hauv ntej ntawm lub koob yees duab sensor. Nws tseem kaw kom txog thaum tus kws yees duab thaij duab. Thaum lub koob yees duab hluav taws kub, lub shutter qhib thiab cia nyob rau hauv lub teeb mus rau lub sensor los ntawm lub aperture ntawm lub lens. Tom qab lub sensor raug rau lub teeb txaus, lub shutter kaw. Qhov no yuav txwv tsis pub lub sensor tsis txhob kis mus rau lub teeb ntxiv.
Lub shutter ceev yog lub sij hawm uas lub koob yees duab sensor raug rau lub teeb nrog kev siv lub koob yees duab shutter. Los ntawm kev siv lub kaw lus ceev ceev, peb muaj peev xwm ua kom khov cov lus tsa suab thaum, nrog lub kaw lus qis dua, peb tuaj yeem tsim cov lus tsa suab plooj. Lub kaw lus qeeb qeeb kuj tseem siv hauv kev yees duab xob laim thiab tseem nyob rau hauv kev ntes cov duab zoo li kev yees duab toj roob hauv pes.
Shutter ceev yog ntsuas hauv feem ntawm cov vib nas this. Qee DSLRs muaj peev xwm txhawb kev kaw qhov nrawm mus txog 1/8000th ntawm ib thib ob. Lub sijhawm ntev tshaj plaws uas tuaj yeem ua tiav los ntawm lub kaw lus yog 30 vib nas this. Thaum siv qeeb shutter speeds, duab stabilization feature yog qhov tseem ceeb heev vim nws yuav them nyiaj yog tias muaj kev co thaum lub sijhawm yees duab. Txwv tsis pub, lub tripod yuav tsum tau siv defiantly kom tsis txhob plam hauv daim duab.
Thaum siv lub shutter ceev, daim duab feem ntau yog tsaus dua, muaj tsawg dua qhov muag plooj thiab feem ntawm cov vib nas this me me. Thaum siv lub kaw lus qeeb qeeb, cov duab txhaj tshuaj yog ci dua, nws muaj qhov muag plooj ntau dua, thiab feem ntau loj dua.
Cov ntsiab lus tseem ceeb uas yuav tsum nco ntsoov thaum xaiv Shutter Ceev
• Thaum siv lub kaw lus qis dua, xav tau lub koob yees duab lossis duab stabilization feature.
• Lub shutter ceev yog txhawj xeeb thaum tua cov khoom txav. Yog tias muaj cov khoom txav mus los, yuav tsum siv lub shutter ceev ceev kom tsis txhob pom qhov muag plooj.
Qhov txawv ntawm ISO thiab Shutter Ceev yog dab tsi?
Daim ntawv thov
ISO: ISO koom nrog lub teeb rhiab heev.
Shutter Ceev: Shutter ceev yog cuam tshuam nrog tus nqi ntawm lub teeb.
Unit of Measure
ISO: ISO ntsuas tus lej.
Shutter Ceev: Lub shutter ceev yog ntsuas nyob rau hauv ib feem ntawm vib nas this.
Siv
ISO: ISO yog txhua yam hais txog lub teeb rhiab heev.
Shutter Ceev: Shutter ceev qhov tseem ceeb muaj peev xwm ua kom khov ib pliag hauv lub sijhawm.
Xaiv ISO thiab Shutter Ceev
ISO: Qhov qis dua ntawm ISO feem ntau yog qhov zoo tshaj plaws rau kev yees duab. ISO siab dua qhov txiaj ntsig txawv txawv ntxiv cov nplej lossis suab nrov rau daim duab.
Shutter Ceev: Lub kaw lus qeeb qeeb tuaj yeem siv rau ntau qhov xwm txheej los tsim cov duab zoo nkauj. Piv txwv li: dej tsaws tsag, lub tsheb sib tw khiav, kev txhaj tshuaj nrog kev txav mus los ntev. Nws yog ib qho ua tau kom siv qhov qis thiab siab shutter speeds txhawm rau tsim cov duab zoo nkauj, raws li qhov xav tau.
Kev Ua Haujlwm
ISO: ISO is virtual
Shutter Ceev: Lub shutter ceev ua haujlwm mechanically.
Nyob ntawm Tus Nqi
ISO: ISO yog cuam tshuam nrog lub sensor, uas yog qhov kim tshaj plaws ntawm lub koob yees duab.
Shutter Ceev: Lub shutter tsis tshua kim dua.
Summary:
ISO vs. Shutter Ceev
Yog tias peb ua tib zoo saib ob qho tib si, kev paub txog ob qho tib si yog qhov tseem ceeb hauv kev yees duab. Raws li qhov xwm txheej yees duab uas tshwm sim, qhov yuav tsum tau kho cov teeb tsa no hauv txoj kev ntse yog qhov tseem ceeb heev hauv cov zis ntawm daim duab.
Lub kaw lus siab dua yog siv rau kev ua kom khov thaum lub kaw lus qis dua yog siv los tsim cov lus tsa suab plooj. Ntawm qhov tod tes, qhov teeb tsa ISO qis dua yog siv nyob rau hauv cov xwm txheej ci ntsa iab kom ntes cov duab meej, cov ncauj lus kom ntxaws. Tus nqi ISO siab dua yog siv hauv kev ua kis las, kev yees duab sab hauv tsev uas teeb pom kev zoo yuav tsis zoo li ntawd.
Image Courtesy:
Image 1: "E17 - korte sluitertijd" [Public Domain] ntawm Wikimedia Commons thiab "E17 - lange sluitertijd" [Public Domain] via Wikimedia Commons
Image 2: "Paj ntawm 100 ISO rau kev sib piv" los ntawm Andrew Hutton HuttyMcphoo - Tus kheej ua haujlwm. [CC BY-SA 3.0] ntawm Wikimedia Commons thiab "Flower ntawm 1600 ISO rau kev sib piv" los ntawm HuttyMcphoo - Tus kheej ua haujlwm. [CC BY-SA 3.0] via Wikimedia Commons
