Cov Focal Lengths Feem Ntau Rau Cov Lens Lag Luam Yog Dab Tsi? Yuav Tsum Xav Txog Cov Yam Dab Tsi Thaum Xaiv Ib Lub Qauv?

1,Cov qhov ntev focal feem ntau siv ntawm cov iav tsom iav lag luam yog dab tsi?

Muaj ntau lub focal lengths siv rau hauvcov iav tsom iav lag luamFeem ntau, ntau qhov ntev ntawm qhov muag pom tau raug xaiv raws li qhov xav tau ntawm kev tua duab. Nov yog qee qhov piv txwv ntawm qhov ntev ntawm qhov muag pom:

A.Qhov ntev ntawm 4 hli

Cov tsom iav ntawm qhov ntev focal no yog qhov tsim nyog tshaj plaws rau kev thaij duab thaj chaw loj thiab qhov ze, xws li cov chaw ua haujlwm hauv Hoobkas, tsev rau khoom, thiab lwm yam.

B.Qhov ntev ntawm 6 hli

Piv nrog rau lub lens ntev focal 4 hli, qhov no yog lub lens ntev focal ntev me ntsis, tsim rau cov sijhawm loj dua me ntsis. Ntau yam khoom siv loj hauv kev lag luam, xws li cov cuab yeej siv tshuab hnyav, cov kab ntau lawm loj, thiab lwm yam, tuaj yeem siv lub lens 6 hli.

C.Qhov ntev ntawm 8 hli

Lub lens 8mm tuaj yeem thaij tau cov duab loj dua, xws li cov kab ntau lawm loj, tsev rau khoom, thiab lwm yam. Yuav tsum nco ntsoov tias lub lens ntawm qhov ntev focal no yuav ua rau cov duab tsis meej hauv cov duab loj.

Lub lens lag luam rau kev thaij duab loj dua

D.12 hli qhov ntev ntawm qhov muag

Piv nrog rau lub lens 8mm focal length, lub lens 12mm muaj qhov dav dua thiab tsim nyog dua rau kev siv hauv cov xwm txheej loj dua.

E.16 hli qhov ntev ntawm qhov muag

Lub lens 16 hli focal length yog lub lens nruab nrab-focal length, tsim nyog rau kev thaij duab ntawm qhov deb nruab nrab. Nws tuaj yeem siv los thaij cov khoom tshwj xeeb ntawm lub Hoobkas, xws li tshuab, khoom siv, thiab lwm yam.

F.Qhov ntev ntawm 25 hli

Lub lens 25mm yog lub lens telephoto uas zoo ib yam, uas tsim nyog dua rau kev thaij duab deb, xws li thaij duab panoramic ntawm tag nrho lub Hoobkas los ntawm qhov chaw siab.

G.35mm, 50mm, 75mm thiab lwm yam ntev focal

Cov iav tsom iav xws li 35mm, 50mm, thiab 75mm yog cov iav tsom iav ntev dua uas siv tau los thaij duab cov chaw ua haujlwm nyob deb dua, lossis rau kev thaij duab macro (qhov deb thaij ze heev) kom ntes tau ntau cov ntsiab lus hauv daim duab.

2,Yuav tsum xav txog cov yam twg thaum xaiv cov iav tsom iav rau kev lag luam?

Thaum xaiv ib qholub lens kev lag luam, cov hauv qab no yuav tsum tau xav txog:

A.Cov kev xav tau ntawm daim ntawv thov

Ua ntej xaiv lub lens, txiav txim siab seb koj daim ntawv thov xav tau hom lens twg. Vim tias cov ntawv thov sib txawv xav tau ntau hom kev teeb tsa xws li qhov qhib, qhov ntev ntawm lub lens thiab thaj chaw pom.

Piv txwv li, koj puas xav tau lub lens dav lossis lub lens telephoto? Xav tau lub peev xwm tsom mus rau qhov twg lossis lub peev xwm zoom? Cov no raug txiav txim siab raws li qhov yuav tsum tau ua ntawm daim ntawv thov.

Xaiv cov iav tsom iav rau kev lag luam raws li cov kev xav tau ntawm daim ntawv thov

B.Cov kev kho qhov muag tsis pom kev

Qhov aperture, focal length, thiab field of view yog cov yam tseem ceeb ntawm lub lens. Aperture txiav txim siab qhov ntau ntawm lub teeb uas lub lens xa tawm, thiab qhov aperture loj tuaj yeem ua tiav cov duab zoo dua hauv cov xwm txheej tsis muaj teeb; focal length, thiab field of view txiav txim siab qhov field of view thiab magnification ntawm daim duab.

C.Duabrkev daws teeb meem

Thaum xaiv lub lens, koj kuj yuav tsum xaiv lub lens uas tsim nyog raws li qhov yuav tsum tau ua kom pom tseeb ntawm daim duab. Qhov kev daws teeb meem ntawm lub lens yuav tsum phim cov pixels ntawm lub koob yees duab kom ntseeg tau tias cov duab zoo.

D.Qhov zoo ntawm lub lens

Qhov zoo ntawm lub lens ncaj qha txiav txim siab qhov meej thiab qhov tsis sib xws ntawm daim duab. Yog li ntawd, thaum xaiv lub lens, koj yuav tsum xav txog lub lens los ntawm lub npe txhim khu kev qha kom ntseeg tau tias muaj kev ua haujlwm zoo ntawm lub lens.

E.Kev hloov pauv ib puag ncig

Thaum xaiv lub lens, koj kuj yuav tsum xav txog qhov chaw ib puag ncig ntawm koj daim ntawv thov. Piv txwv li, yog tias qhov chaw ib puag ncig muaj cov yam xws li hmoov av, dej noo, lossis kub siab, koj yuav tsum xaiv lub lens uas tiv taus hmoov av, tiv taus dej, thiab tiv taus kub siab.

F.Kev siv nyiaj rau lub lens

Kev siv nyiaj yog ib qho tseem ceeb uas yuav tsum xav txog thaum xaiv lub lens. Cov hom lens sib txawv thiab cov qauv muaj tus nqi sib txawv, yog li ntawd xyuas kom koj xaiv lub lens zoo raws li koj cov peev nyiaj.

Cov Lus Xaus:

ChuangAn tau ua tiav qhov kev tsim qauv thiab kev tsim khoom ua ntej ntawmcov iav tsom iav lag luam, uas siv rau txhua yam ntawm kev siv hauv kev lag luam. Yog tias koj xav tau lossis muaj kev xav tau rau cov iav tsom iav hauv kev lag luam, thov hu rau peb sai li sai tau.