1.Puas yog lub lens wide-angle haum rau portraits?

Cov lus teb feem ntau tsis yog,wide-angle lo ntsiab muagfeem ntau tsis haum rau kev yees duab portraits. Lub lens dav, raws li lub npe qhia, muaj qhov pom loj dua thiab tuaj yeem suav nrog ntau qhov chaw hauv kev txhaj tshuaj, tab sis nws tseem yuav ua rau muaj kev cuam tshuam thiab deformation ntawm cov cim hauv daim duab.

Qhov ntawd yog hais tias, siv lub kaum sab xis dav los tua cov duab portraits yuav deform lub ntsej muag ntawm cov cim. Piv txwv li, qhov proportions ntawm lub taub hau thiab lub cev saib loj dua, thiab cov kab ntawm lub ntsej muag kuj yuav elongated thiab distorted. Qhov no tsis yog qhov kev xaiv zoo tshaj plaws rau kev yees duab portrait.

Yog tias koj xav tau cov duab portraits, nws raug nquahu kom siv qhov nruab nrab focal ntev lossis telephoto lens kom ua tiav cov txiaj ntsig peb-dimensional portrait. Yog li, dab tsi yog lub lens dav dav haum rau kev tua?

A wide-angle lensmuaj qhov ntev focal ntev, feem ntau ntawm 10mm thiab 35mm. Nws qhov kev pom yog loj dua li qhov tib neeg lub qhov muag pom tau. Nws yog qhov tsim nyog rau kev tua qee qhov chaw muaj neeg coob coob, thaj chaw dav dav, thiab cov duab uas yuav tsum tau hais txog qhov tob ntawm qhov chaw thiab qhov kev xav pom.

Wide-angle lens shooting illustration

Vim nws qhov dav ntawm qhov pom, lub lens dav tuaj yeem ntes ntau lub ntsiab lus, ua rau daim duab nplua nuj thiab ntau txheej. Lub lens dav kuj tseem tuaj yeem nqa cov khoom nyob deb thiab ze rau hauv daim duab, muab kev nkag siab ntawm kev qhib siab. Yog li ntawd, lub koob yees duab dav dav feem ntau yog siv los tua cov tuam tsev, lub nroog txoj kev scenes, qhov chaw sab hauv tsev, cov duab pab pawg, thiab kev yees duab saum huab cua.

2.Lub hauv paus ntsiab lus duab thiab cov yam ntxwv ntawmwide-angle lo ntsiab muag

Cov duab ntawm lub kaum sab xis dav ua tiav cov txiaj ntsig dav dav los ntawm kev tsim lub lens system thiab lub kaum sab xis ntawm lub teeb (los ntawm kev hla lub teeb los ntawm lub lens tshwj xeeb, qhov chaw nyob deb ntawm lub hauv paus axis yog npaj rau lub koob yees duab cov duab sensor lossis zaj duab xis), yog li ua kom lub koob yees duab ntes mus rau qhov dav dav. Txoj cai no yog siv dav hauv kev yees duab, tshaj tawm thiab lwm yam.

Peb tuaj yeem nkag siab txog lub hauv paus ntsiab lus ntawm cov duab ntawm lub kaum sab xis dav los ntawm cov hauv qab no:

Lens System:

Wide-angle lo ntsiab muagfeem ntau yog siv ib qho kev sib xyaw ua ke ntawm luv focal ntev thiab loj txoj kab uas hla lo ntsiab muag. Qhov kev tsim no tso cai rau lub kaum sab xis dav kom khaws ntau lub teeb thiab xa nws mus rau lub koob yees duab cov duab sensor.

Aberration tswj:

Vim yog qhov tsim tshwj xeeb, lub ntsej muag dav dav feem ntau ua rau muaj teeb meem aberration, xws li distortion, dispersion, thiab lwm yam. Txhawm rau daws cov teeb meem no, cov tuam ntxhab siv ntau yam khoom siv kho qhov muag thiab txheej txheej thev naus laus zis kom txo qis lossis tshem tawm cov teebmeem no.

Projection kaum sab xis:

Lub kaum sab xis dav ua tiav cov txiaj ntsig dav dav los ntawm kev nce lub kaum sab xis ntawm qhov xwm txheej thiab qhov nruab nrab ntawm lub lens. Nyob rau hauv txoj kev no, ntau scenery yuav muab tso rau hauv daim duab nyob rau hauv tib qhov deb, uas qhia ib tug dav ntawm saib.

Lub lens wide-angle

Hauv kev siv tswv yim, peb yuav tsum xaiv lub lens wide-angle raws li kev xav tau kev yees duab tshwj xeeb thiab scenes. Feem ntau hais lus, cov yam ntxwv imaging ntawm wide-angle lo ntsiab muag yog raws li nram no:

Perspective distortion:

Thaum tua cov khoom kaw nrog awide-angle lens, perspective distortion tshwm sim, uas txhais tau hais tias nyob rau hauv cov duab ntes, cov khoom nyob ze yuav tshwm loj dua, thaum cov khoom nyob deb yuav tshwm me me. Cov nyhuv ntawm kev pom kev cuam tshuam tuaj yeem siv los tsim cov txiaj ntsig kev pom tshwj xeeb, xws li kev xav tsis thoob thiab hais txog cov khoom hauv ntej.

Kev pom dav dav:

Lub kaum sab xis dav tuaj yeem ntes tau qhov dav ntawm qhov pom thiab tuaj yeem ntes ntau qhov chaw lossis scenes. Yog li ntawd, lub koob yees duab dav dav feem ntau yog siv los tua scenes xws li toj roob hauv pes, vaj tse, sab hauv tsev, thiab cov neeg coob coob uas xav kom pom qhov dav dav.

Curved ntug:

Wide-angle lo ntsiab muag yog feem ntau cuam tshuam rau ntug distortion los yog nkhaus cuam tshuam, tshwj xeeb tshaj yog nyob rau kab rov tav thiab ntsug. Qhov no yog vim muaj kev txwv lub cev ntawm lub lens tsim thiab qee zaum tuaj yeem siv los txhob txwm tsim cov nyhuv tshwj xeeb lossis cov lus pom.

Extended depth of field:

Lub kaum sab xis dav muaj qhov ntev me me, yog li nws tuaj yeem tsim qhov tob ntawm qhov loj dua, uas yog, ob qho tib si pem hauv ntej thiab sab nraub qaum tuaj yeem tuav cov duab meej. Cov cuab yeej no ua rauwide-angle lo ntsiab muagtseem ceeb heev nyob rau hauv kev txhaj tshuaj qhov twg tag nrho qhov tob ntawm qhov chaw yuav tsum tau hais txog.

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