Cov iav dav davmuab qhov pom dav dav, cia koj thaij tau lub ntuj hmo ntuj dav dua thiab cov ntsiab lus ntxaws ntxaws ntawm Milky Way thaum thaij duab cov hnub qub. Yog li, koj xaiv lub lens dav dav li cas thaum thaij duab lub ntuj muaj hnub qub?
Xaiv lub lens dav dav uas zoo yuav tsum xav txog ntau yam. Cia peb saib cov yam tseem ceeb uas cuam tshuam rau:
1.Kev xaiv qhov ntev ntawm qhov muag
Qhov ntev focal ntawm 14-24mm yog qhov ntev focal zoo tshaj plaws rau cov lens wide-angle los thaij duab lub ntuj uas muaj hnub qub. Nws tuaj yeem thaij tau tag nrho Milky Way thaum ua kom cov duab zoo ntawm ntug meej, ua rau nws tsim nyog rau kev thaij duab panoramic ntawm Milky Way thiab cov xwm txheej uas sib xyaw cov hnub qub nrog cov toj roob hauv pes.
Piv txwv li, siv qhov ntev focal length 14mm tso cai rau koj thaij duab lub ntuj dav dav thiab thaij tau tag nrho cov duab ntawm Milky Way, thaum siv qhov ntev focal length 24mm tso cai rau koj thaij tau ntau qhov chaw.
2.Kev xaiv qhov qhib
Thaum thaij duab lub ntuj uas muaj hnub qub, nws yog qhov zoo tshaj plaws los xaiv lub lens dav dav uas muaj qhov aperture loj tshaj plaws, vim tias qhov aperture loj muaj qhov zoo dua nyob rau hauv qhov chaw uas muaj teeb pom kev tsawg. Qhov aperture dav ua kom muaj lub teeb txaus, tiv thaiv cov hnub qub kab thaum tib lub sijhawm tso cai rau qhov chaw ISO qis dua - yog li ntawd txo cov suab nrov thiab tsim cov duab nrog qhov tseeb thiab huv si.
Thaum thaij duab lub ntuj uas muaj hnub qub, nws raug pom zoo kom xaiv qhov qhib siab tshaj plaws ntawm F2.8 lossis siab dua. F2.8 yog qhov pib uas haum rau feem ntau qhov xwm txheej, thaum F1.4-1.8 yog qhov zoo tshaj plaws thiab haum rau cov chaw muaj teeb pom kev tsawg.
Thaum thaij duab lub ntuj uas muaj hnub qub nrog lub lens dav dav, yuav tsum xav txog qhov aperture
3.Kev tswj xyuas qhov zoo ntawm daim duab
Cov iav dav davyooj yim muaj teeb meem chromatic aberration thiab barrel distortion; lub lens zoo heev yuav tsum tswj tau chromatic aberration thiab distortion zoo. Thaum thaij duab lub ntuj uas muaj hnub qub, yog tias lub lens tsis tswj tau chromatic aberration zoo, cov xim ntshav yuav tshwm sim nyob ib puag ncig cov hnub qub, thaum distortion yuav ua rau daim duab distorted, cuam tshuam rau tag nrho cov nyhuv.
Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum xaiv lub lens uas ua rau pom kev zoo dua li qub thiab kev cuam tshuam ntawm cov duab. Tsis tas li ntawd xwb, nws yog ib qho tseem ceeb uas yuav tsum xaiv lub lens uas muaj qhov daws teeb meem siab kom cov hnub qub pom tseeb thiab ntse, zam kev tsis meej pem.
4.Kev tsom mus rau tes meej
Nyob rau hauv qhov chaw tsaus ntuj, lub koob yees duab lub autofocus function feem ntau yuav tsis ua haujlwm zoo, ua rau yuav tsum tau hloov kho manually focus—tshwj xeeb, teeb tsa lub focus ring rau lub cim infinity (∞). Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias lub cim infinity ntawm lub lens qhov nrug feem ntau qhia txog qhov tsis raug me ntsis hauv kev xyaum thiab tsis tuaj yeem cia siab rau nws tus kheej xwb.
Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum xaiv lub lens uas muaj lub nplhaib tsom xam nruab nrab thiab lub lens mus ntev kom yooj yim kho qhov tsom xam kom raug thiab xyuas kom meej tias cov hnub qub meej thiab ntse.
Kev thaij duab lub ntuj uas muaj hnub qub nrog lub lens dav dav feem ntau yuav tsum tau siv tes ua kom pom tseeb
5.Qhov hnyav thiab ntim
Yog tias koj yuav tsum nqa lublub lenssab nraum zoov rau lub sijhawm ntev, koj yuav tsum xav txog qhov hnyav thiab qhov loj ntawm lub lens. Piv txwv li, thaum nqa cov khoom siv rau kev ua ub no sab nraum zoov uas xav tau sijhawm ntev, xws li nce roob lossis taug kev, nws yog ib qho tseem ceeb uas yuav tsum xaiv lub lens uas tsim los ntawm lub teeb kom koj tuaj yeem mus ncig ua si thiab txo koj lub nra hnyav.
Tsis tas li ntawd xwb, nws yog ib qho tseem ceeb uas yuav tsum xaiv lub lens uas haum rau koj cov peev nyiaj. Yog tias koj muaj peev nyiaj ntau, koj tuaj yeem xaiv lub lens kim heev; txawm li cas los xij, yog tias koj cov peev nyiaj tsawg, feem ntau nws yog qhov zoo dua los xaiv lub lens uas ua tau raws li koj cov kev xav tau yooj yim.
Cov Lus Xaus:
Yog tias koj xav yuav ntau hom lens rau kev soj ntsuam, scanning, drones, smart home, lossis lwm yam kev siv, peb muaj yam koj xav tau. Tiv tauj peb hnub no kom paub ntau ntxiv txog peb cov lens thiab lwm yam khoom siv.
Lub sijhawm tshaj tawm: Tsib Hlis-06-2026
