Lub lens ruaj khov yog dab tsi?

Raws li lub npe qhia, atsau tsom iav lensyog hom kev yees duab lens uas muaj qhov ntev focal ntev, uas tsis tuaj yeem hloov kho thiab sib haum rau lub lens zoom.

Kev hais lus zoo, cov tsom iav tsom iav feem ntau muaj qhov aperture loj dua thiab zoo dua qhov muag pom, ua rau lawv tsim nyog rau kev thaij duab zoo.

Qhov sib txawv ntawm cov tsom iav tsom iav thiab zoom lo ntsiab muag

Tsau tsom iav lens thiab zoom lens yog ob hom ntawm lub koob yees duab lo ntsiab muag, thiab lawv qhov sib txawv tseem ceeb nyob ntawm seb qhov ntev focal adjustable.Lawv muaj lawv tus kheej zoo thaum siv nyob rau hauv ntau daim ntawv thov scenarios.

Piv txwv li, lub lens ruaj khov yog tsim nyog rau kev siv nyob rau hauv cov xwm txheej ntawm lub teeb pom kev zoo, nrhiav cov duab zoo, thiab cov ntsiab lus tseem ceeb, thaum lub lens zoom yog qhov tsim nyog rau cov xwm txheej uas yuav tsum tau ua kom zoom, xws li kev yees duab kev ua si.

Lub lens ruaj khov

Focal ntev

Lub focal ntev ntawm lub lens ruaj khov kho, xws li 50mm, 85mm, thiab lwm yam, thiab tsis tuaj yeem hloov kho.Lub lens zoom tuaj yeem kho qhov ntev ntawm lub focal ntev los ntawm kev tig los yog thawb thiab rub lub lens chim, tso cai rau kev xaiv hloov pauv ntawm lub kaum ntse ntse thiab telephoto.

Optical kev ua tau zoo

Feem ntau, atsau tsom iav lensNws muaj qhov zoo ntawm qhov muag pom zoo dua li lub lens zoom vim nws qhov tsim tau yooj yim dua thiab tsis tas yuav xav txog lub lens txav los yog cov qauv kho qhov muag nyuaj.Kev hais lus zoo, cov tsom iav tsom iav feem ntau muaj qhov aperture ntau dua (nrog F-tus nqi me dua), uas tuaj yeem muab cov duab zoo dua, muaj lub teeb pom kev zoo dua, thiab zoo dua tom qab qhov muag plooj.

Tab sis tam sim no nrog txoj kev loj hlob ntawm thev naus laus zis, qee qhov high-end zoom lo ntsiab muag tseem tuaj yeem ncav cuag qib ntawm cov tsom iav tsom iav nyob rau hauv cov nqe lus ntawm kev ua haujlwm kho qhov muag.

Qhov hnyav thiab ntim

Cov qauv ntawm lub tsom iav tsom iav yog qhov yooj yim, feem ntau me me thiab sib zog me me.Cov qauv ntawm lub lens zoom yog qhov nyuaj, muaj ntau lub lo ntsiab muag, yog li nws feem ntau hnyav dua thiab loj dua, uas yuav tsis yooj yim rau cov kws yees duab siv.

Txoj kev tua

Tsau tsom iav lenss yog haum rau shooting tej scenes los yog tej yam kev kawm, vim lub focal ntev tsis tuaj yeem hloov kho, thiab cov lo ntsiab muag tsim nyog yuav tsum tau xaiv raws li qhov deb ntawm kev tua.

Lub lens zoom yog qhov hloov tau yooj yim thiab tuaj yeem kho qhov focal ntev raws li kev xav tau ntawm kev tua yam tsis hloov qhov chaw tua.Nws yog haum rau scenes uas yuav tsum tau hloov pauv hloov nyob rau hauv shooting nrug thiab lub kaum sab xis.