1.Dab tsi yog dav lub kaum sab xis?

A dav-lub lensyog lub lens nrog lub luv luv focal ntev. Nws cov yam tseem ceeb yog qhov pom lub kaum sab xis thiab pom tseeb.

Dav-lub lo ntsiab muag yog dav siv nyob rau hauv kev yees duab duab, kos duab duab, nyob sab hauv tsev, thiab thaum tua neeg yuav tsum tau ntes ntau yam scenes.

2.Dab tsi yog qhov kev siv ntawm lub ntsej muag dav dav?

Dav-tawv loces tsuas yog siv hauv qab no:

Hais txog cov nyhuv ze

Vim tias lub lens dav dav muaj qhov tob loj ntawm daim teb, nws tuaj yeem ua tiav cov nyhuv ze ze. Siv lub lens dav-lub ntsej muag tuaj yeem tua tau tuaj yeem ua rau cov khoom foreground, thiab ua kom pom kev deb ntawm cov nyhuv tom ntej, ntxiv rau kev nkag siab ntawm txheej thiab peb-seem rau tag nrho cov duab.

Lub Lens-Lub Ntsig

Txhim Kho Cov Kev Ntsuas

Thaum siv adav-lub lens, yuav muaj ib qho ze-loj thiab deb-me, uas yog feem ntau hu ua "Fisheye nyhuv". Cov kev xav pom zoo no tuaj yeem ua cov duab thaij duab pom ze rau tus neeg saib xyuas, muab cov neeg muaj zog ntawm qhov chaw thiab peb-seem. Yog li no, lub lens sab-lub ntsej muag yog feem ntau siv nyob rau hauv cov kws xuas tes ua kev yees duab kom tau hais txog lub tsev loj thiab lub zog.

Kev ntes loj-teev scenes

Ib lub teeb ci ntsa iab tuaj yeem nthuav dav lub kaum sab xis pom, xws li cov roob ntxiv, hiav txwv nws tuaj yeem ua rau cov duab ntau dua thiab qhib, thiab haum rau kev tua Scenes uas yuav tsum tau qhia txog qhov chaw loj heev.

Daim Ntawv Thov Kev Yees Duab Tshwj Xeeb

Kev siv lub lo ntsiab muag dav kuj tseem siv tau rau kev yees duab tshwj xeeb, xws li tua cov duab ze lossis cov cim cim, uas tuaj yeem tsim kev pom tseeb thiab muaj tseeb scenes.

3.Qhov sib txawv ntawm lub ntsej muag dav dav thiabzoo li ib txwmdaim iab

Dav-lub lo ntsiab muag thiab cov lo ntsiab muag qub yog cov lens hom hauv kev yees duab. Lawv txawv hauv cov nram qab no:

Cov duab thaij nrog lub kaum ntse ntse ntse vs. cov duab thaij nrog lub lens qub

Pom ntau

A dav-lub lensmuaj ib daim teb loj ntawm kev pom thiab tuaj yeem ntes ntau ib puag ncig thiab cov ntsiab lus. Qhov no muaj txiaj ntsig rau cov chaw ua hauj lwm, sab hauv, lossis scenes uas yuav tsum tau qhia tau.

Hauv kev sib piv, kev pom ntawm cov ntsiab muag qub yog cov me me thiab yog qhov tsim nyog rau cov ntsiab lus hauv zos, xws li duab uas xav tau los qhia txog cov ncauj lus.

Filming AngleGle

Lub ntsej muag dav-lub ntsej muag zoo li tua los ntawm cov dav dav dua li lub lens tsis tu ncua. Ib lub lens dav-lub kaum ntse ntse tuaj yeem ntes cov kab ntsig dav dav ntawm cov scenes thiab tag nrho cov teeb meem dav rau hauv tus ncej. Hauv kev sib piv, cov lenses qub muaj ib qho kev sib luag ntawm lub kaum ntse ntse shooting thiab yog qhov tsim nyog rau kev ntes cov khoom nruab nrab-deb.

Pansvective nyhuv

Txij li thaum tua cov lens dav dav yog loj dua, cov khoom sib ze pom qhov loj dua thaum lub keeb kwm yav dhau los. Qhov kev xav pom zoo no yog hu ua "dav-kaum sistortion" thiab ua rau cov khoom nyob hauv chav ze rau deform thiab tshwm sim ntau dua.

Hauv kev sib piv, cov kev pom zoo ntawm cov lenses qub yog qhov tseeb tiag tiag, thiab cov piv ntawm ze ze rau qhov kev soj ntsuam qhov xwm txheej tiag tiag.

4.Qhov sib txawv ntawm lub ntsej muag dav dav thiab fisheye lens

Qhov sib txawv ntawm lub lens dav thiab lub fisheye lens tsuas yog cov lus dag hauv thaj teb pom thiab cov nyhuv distortion)

Pom ntau

A dav-lub lensFeem ntau muaj qhov dav dav ntawm kev pom dua li lub lens tsis tu ncua, tso cai rau nws ntes ntau ntawm qhov xwm txheej. Nws lub kaum sab xis ntawm saib yog feem ntau ntawm txog 50 qib thiab 85 degrees ntawm ib 35 hli puv-ncej koob yees duab.

Lub fisheye lens muaj kev pom dav dav heev ntawm kev pom thiab tuaj yeem ntes cov scenes ntau tshaj 180 degrees, lossis txawm panoramic dluab. Yog li no nws pom lub kaum ntse ntse tuaj yeem muaj ntau dua li ntawm lub lens dav dav, uas yog feem ntau ntawm 180 degrees ntawm lub koob yees duab puv ntoob.

Cov duab thaij nrog fisheye lens

Distortion nyhuv

Dav-lub lens sab nraud tsim tsawg dua distortion thiab tuaj yeem nthuav tawm cov scene tiag tiag scene ua ntu zus thiab cov kab ua ke. Nws me ntsis dilates nyob ze cov khoom, tab sis tag nrho cov nyhuv distortion tsis zoo me me.

Lub fisheye lens muaj qhov tseeb distortion nyhuv, uas yog cov khoom nthuav dav, thaum lub sij hawm deb ntawm cov khoom uas nyob ze, ua rau muaj kev cuam tshuam dab neeg zoo nkauj.

Cawmsab thiab siv cov xwm txheej

Lub lens dav dav yog haum rau kev tua cov scenes uas yuav tsum muaj kev sib tw dav, thiab lwm yam los tswj kev txiav txim siab thiab kev ntseeg.

Hauv kev sib piv, fisheye lo ntsiab muag yog qhov tsim nyog rau kev tsim cov kev cuam tshuam tshwj xeeb thiab tuaj yeem tsim cov chaw tshwj xeeb, kev tsim cov kis las, lossis tsim kev ua yeeb yam.