1.Yog dav-lub kaum ntse ntse tsim nyog rau cov duab?

Cov lus teb feem ntau tsis yog,dav-lub lensfeem ntau tsis haum rau kev tua portraits tua. Lub ntsej muag dav-lub npe, raws li lub npe pom zoo, muaj xws li scenery nyob rau hauv kev txhaj tshuaj, tab sis nws tseem yuav ua rau distortion thiab deformation ntawm cov cim hauv daim duab.

Qhov ntawd yog hais, siv ib lub lens dav dav los tua cov duab duab yuav ua rau lub ntsej muag ntsej muag ntawm cov cim. Piv txwv li, cov feem sib npaug ntawm lub taub hau thiab lub cev saib loj dua, thiab cov kab ntawm lub ntsej muag tseem yuav yog elongated thiab distorted. Qhov no tsis yog qhov kev xaiv zoo tshaj plaws rau Portrait Photography.

Yog tias koj xav tau portraits, nws raug nquahu kom siv qhov nruab nrab focal ntev lossis telchhoto lens kom ua tiav qhov tseeb thiab muaj peb-seem ntawm sab nraud. Yog li, dab tsi yog dav-lub kaum sab xis tsim nyog rau kev tua?

A dav-lub lensMuaj qhov ntev focal ntev, feem ntau ntawm 10 hli thiab 35mm. Nws cov teb ntawm kev pom yog loj dua li tib neeg lub qhov muag tuaj yeem pom. Nws yog qhov haum rau kev tua qee cov neeg coob heev, cov toj roob hauv pes dav, thiab cov duab uas xav tau hais txog qhov tob ntawm qhov chaw thiab cov kev xav.

Dav-lub lens shooting duab

Vim yog nws cov chaw dav ntawm kev pom, dav-lub lens dav tuaj yeem ntes ntau cov ntsiab lus, ua daim duab nplua nuj thiab ntau txheej. Ib lub lens dav dav kuj tseem tuaj yeem nqa cov khoom ntawm ob qho tib si deb thiab ze rau hauv daim duab, muab lub siab ntawm kev qhib. Yog li no, lub ntsej muag dav-dav hlau feem ntau siv los tua cov tsev, thaj chaw hauv nroog, sab hauv tsev, cov duab hauv tsev, cov duab hauv tsev, thiab duab nruab nrab.

2.Lub tswv yim kev xav thiab cov yam ntxwv ntawmdav-lub lens

Qhov kev xav ntawm lub ntsej muag dav-lub ntsej muag ua tiav qhov teeb meem dav los ntawm lub teeb ci ntsa iab thiab lub teeb ci los ntawm lub teeb ci tshwj xeeb, qhov chaw nyob deb ntawm lub hauv paus Axis yog npaj rau Lub koob yees duab duab ntawm lub tswv yim lossis zaj duab xis), yog li ua kom lub koob yees duab los ntes kom dav dav dav. Lub ntsiab cai no tau siv dav hauv kev yees duab, tshaj tawm thiab lwm thaj teb.

Peb tuaj yeem nkag siab cov kev xav txog lub ntsiab cai ntawm cov lo ntsiab muag ntawm lub ntsej muag los ntawm cov hauv qab no:

Lens System:

Dav-lub lensFeem ntau siv kev sib xyaw ntawm Focal Focal ntev thiab lo ntsiab muag. Qhov kev tsim qauv no tso cai rau lub ntsej muag dav-lub teeb ci ntsa iab thiab kis nws zoo rau lub koob yees duab cov duab duab.

Kev tswj aberration:

Vim yog cov lo ntsiab muag tshwj xeeb, dav-lub lo ntsiab muag dav dav yog feem ntau tau daws cov teeb meem kho kho tshiab thiab cov txheej txheem thev naus laus zis kom txo qis kev cuam tshuam cov kev phem no.

Kev kwv yees lub kaum:

Lub ntsej muag dav-lub ntsej muag ua tiav qhov kev cuam tshuam dav-lub kaum sab xis ntawm lub kaum sab xis thiab lub hauv paus ntawm lub lens. Nyob rau hauv txoj kev no, ntau scenery yuav muaj nyob rau hauv daim duab nyob rau tib qho deb, uas qhia ib tug dav dav ntawm kev pom.

Lub Lens-Lub Ntsig

Hauv kev siv cov kev siv, peb yuav tsum xaiv qhov tsim nyog dav-lub lens raws li kev yees duab xav tau thiab scenes. Feem ntau hais lus, cov yam ntxwv xav txog tus yam ntxwv dav dav-lub lenses muaj raws li hauv qab no:

Lub tswv yim pom distortion:

Thaum tua cov khoom kaw nrog adav-lub lens, pom kev cuam tshuam distortion tshwm sim, uas txhais tau tias nyob rau hauv cov duab uas ntes, nyob ze yuav tshwm me dua, thaum deb cov khoom yuav tshwm me dua. Cov nyhuv ntawm cov kev xav txawv txav tuaj yeem siv los tsim cov nyhuv pom kev zoo nkauj, xws li pom kev pom zoo thiab qhia txog cov khoom lag luam.

Dav teb ntawm pom:

Ib lub lens dav-lub kaum ntse ntse tuaj yeem ntes cov teb dav dav ntawm kev pom thiab tuaj yeem ntes ntau qhov chaw zoo nkauj lossis kev pom zoo. Yog li no, lub ntsej muag dav-dav-dav hlau feem ntau yog siv los tua scenes xws li cov av, vaj tse, thiab cov neeg coob coob uas yuav tsum tau qhia lub ntsej muag dav.

Nkhaus npoo:

Dav-lub lo ntsiab muag yog nquag mus rau ntug distortion lossis nkhaus cuam tshuam, tshwj xeeb ntawm cov kab rov tav thiab ntsug. Qhov no yog vim muaj qhov kev txwv ntawm lub cev ntawm lub ntsiab muag kev tsim qauv thiab qee zaum tuaj yeem siv los txhob txwm tsim cov nyhuv tshwj xeeb lossis cov lus pom.

Txuas ntxiv ntawm daim teb:

Ib lub lens dav-lub lens muaj qhov ntev me me hauv paus, yog li nws tuaj yeem tsim ib qhov tob loj, yog, ob sab hauv ntej thiab rov qab muaj tseeb duab. Cov cuab yeej no ua raudav-lub lensMuaj txiaj ntsig zoo hauv kev txhaj tshuaj uas qhov tob tag nrho ntawm qhov tshwm sim yuav tsum tau qhia meej.

Lwm Txoj Kev Nyeem Ntawv:Dab tsi yog fisheye lens? Dab tsi yog peb hom fisheye lo ntsiab muag?