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Ua Qhov Tseem Ceeb Photoshop Ua
Menyuam Mos Yuav tsum Muaj Hnub Yug ™ Menyuam mos Menyuam Kho Qhov Kho Duab Photoshop Ua Haujlwm
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Los ntawm Matthew L Kees, qhua rau MCP Cov Haujlwm Blog
Thawj coj ntawm MLKstudios.com Kev Tshawb Fawb Online Kev Tshawb Fawb [MOPC]
Siv Flash ntawm Qhov Deb ("mus rau nram squares ...")
Flash-to-subject nrug tsis yog feem ntau yog teeb meem nyob hauv tsev, tshwj tsis yog koj bouncing lub teeb tawm ntawm lub qab nthab siab lossis koj nyob hauv qhov chaw loj heev, zoo li lub tsev teev ntuj. Tawm sab nraud nyob rau hauv qhov chaw qhib, nws tau yooj yim los ua lub hauv paus rau koj lub teeb nyem thiab lub koob yees duab.
Ib lub eeb tsim ib ncig ntawm Xenon puv lub raj xa dej. Lub raj zoo li lub teeb me me teeb rau hauv cov teeb tsa. Txoj haujlwm ntawm tus tsom ntsej muag yog xa lub teeb hauv ib qho kev taw qhia. Tab sis, nws tseem yuav tsum tau kis nws tawm qee qhov lossis nws yuav tsuas yog teeb pom thaj tsam qhov loj me ntawm lub qhov rai nyem.
Thaum lub teeb mus mus deb ntawm lub ntsais nws kis tau tawm ntawm cov duab plaub. Ob qhov siab thiab dav ntawm cov duab nce. Thaum nws kis tawm nws kuj poob rau hauv kev siv. Cov kev siv ntawm lub teeb ntog tawm siv cov uas paub tias yog Inverse Square Law. Hauv cov lus yooj yooj yim Inverse Square Txoj Cai txhais tau tias lub teeb ci heev nyob ze ntawm qhov chaw tab sis poob ntau ntawm nws qhov kev siv ntawm qhov deb - siv cov mis, ib qho dhau ntawm plaub fab.
Kev kawm txog lej ntawm Inverse Square Law thiab vim li cas nws yog qhov tseem ceeb:
Nrog rau qhov kev kawm ntawm kaum taw deb, qhov ceev nrawm poob rau 1/100 ntawm qhov nws yog ib txhais taw deb. Ntawm 20 ko taw, nws poob rau 1 / 400th thiab ntawm 40 taw lub teeb ntog mus rau 1 / 1600th ntawm nws pib siv. Yog tias koj sim thawb nws mus rau 50 ko taw, koj lub ntsiab lus tsuas yog tau txais 1 / 2500th ntawm lub teeb - ib qho dhau tsib caug plaub fab.
Zoo tib yam yog tias koj bouncing lub teeb tawm ntawm 20 ko taw siab qab nthab. Qhov kev ncua deb ntawm lub teeb tau mus ncig yog tsawg kawg 40 ko taw - nce mus rau saum qab nthab thiab rov qab rau koj lub ncauj lus. Cov (cov) tau txais tsawg dua 1 / 1600th ntawm lub eeb siv txawm tias lawv tau sawv tsuas yog peb taw deb.
Puas yog koj yuav tsum tua nrog lub teeb nyem los ntawm kom deb, ua ntej qhib koj lub aperture kom ntau lub teeb nyem nkag, thiab thib ob nce ISO rau tib qho laj thawj uas tsa cov ISO xav tau lub teeb me dua thaum tsis siv lub teeb nyem.
Yog tias koj lub ntsiab lus nyob deb heev, koj yuav tsum tau tshem tawm lub eeb ntawm qhov khau kub thiab siv nws nyob hauv chaw taws teeb. Kom ib tug neeg coj lub teeb kom ze rau koj cov ntawv lossis tso nws nyob ze ntawm qhov chaw muag zaub.
Nco ntsoov tias TXHUA lub teeb ntog siv cov cai no - flash, strobes, teeb txawb hauv tsev, txawm tias muaj hnub ci. Tab sis lub hnub ci yog kom deb li deb uas lwm ko taw lossis ob, lossis ntau mais tsis cuam tshuam nws qhov ci. Qhov qaij ntawm lub ntiaj teb thiab nws nyob deb li cas rau lub hnub txawm li cas los xij, hloov peb lub caij nyoog.