1.Dab tsi yog lub lens dav?

A wide-angle lensyog ib lub lens nrog ib tug luv luv focal ntev. Nws cov yam ntxwv tseem ceeb yog qhov dav saib lub kaum ntse ntse thiab pom tseeb qhov pom tseeb.

Wide-angle lo ntsiab muag tau siv dav hauv kev yees duab toj roob hauv pes, kev yees duab vaj tsev, kev yees duab sab hauv tsev, thiab thaum tua yuav tsum tau ntes ntau yam scenes.

2.Dab tsi yog kev siv lub lens dav?

Wide-angle lo ntsiab muag feem ntau muaj cov hauv qab no siv:

Ua kom pom tseeb cov nyhuv ze

Vim tias lub lens dav dav muaj qhov tob ntawm qhov ntau dua, nws tuaj yeem ua tiav cov txiaj ntsig zoo dua. Siv lub lens dav dav los tua tuaj yeem ua rau cov khoom pem hauv ntej kom pom tseeb raws li cov khoom nyob deb, nthuav cov khoom hauv ntej, thiab ua kom pom tseeb qhov tob ntawm cov nyhuv, ntxiv qhov kev nkag siab ntawm txheej txheej thiab peb-dimensionality rau tag nrho cov duab.

Lub lens wide-angle

Txhim khu kev pom zoo

Thaum siv awide-angle lens, yuav muaj qhov ze-loj thiab deb-me me, uas feem ntau hu ua "fisheye effect". Qhov kev xav pom no tuaj yeem ua rau cov khoom yees duab tshwm sim ze rau cov neeg soj ntsuam, ua rau tib neeg muaj kev nkag siab zoo ntawm qhov chaw thiab peb-dimensionality. Yog li ntawd, lub koob yees duab dav dav feem ntau siv hauv kev yees duab architectural los qhia txog lub meej mom thiab lub zog ntawm lub tsev.

Nthuav cov xwm txheej loj

Lub lens dav tuaj yeem nthuav tawm lub kaum sab xis dav, tso cai rau cov kws yees duab thaij duab thaij duab ntau dua, xws li cov roob nyob deb, hiav txwv, lub nroog panoramas, thiab lwm yam. Nws tuaj yeem ua rau daim duab peb sab thiab qhib, thiab tsim nyog rau kev tua. scenes uas yuav tsum tau qhia qhov kev nkag siab ntawm qhov chaw loj.

Daim ntawv thov kev yees duab tshwj xeeb

Lub koob yees duab dav kuj tseem siv tau rau kev yees duab tshwj xeeb, xws li kev yees duab ze-up portraits lossis cov cim documentaries, uas tuaj yeem tsim cov duab tiag tiag thiab tiag tiag.

3.Qhov txawv ntawm lub kaum sab xis dav thiabib txwmlens

Lens wide-angle thiab ib txwm lo ntsiab muag yog hom lens hom hauv kev yees duab. Lawv txawv ntawm cov hauv qab no:

Cov duab thaij nrog lub lens dav thiab cov duab thaij nrog lub lens ib txwm

Saib tau ntau yam

A wide-angle lensmuaj qhov pom loj dua thiab tuaj yeem ntes ntau qhov chaw ib puag ncig thiab cov ntsiab lus. Qhov no muaj txiaj ntsig zoo rau kev tua toj roob hauv pes, thaj chaw sab hauv, lossis scenes qhov twg tom qab yuav tsum tau hais txog.

Nyob rau hauv kev sib piv, lub teb ntawm saib ntawm ib txwm lo ntsiab muag yog kuj me me thiab yog ntau haum rau shooting nyob rau hauv lub zos cov ntsiab lus, xws li portraits los yog scenes uas yuav tsum tau qhia txog cov ntsiab lus.

Lub kaum ntse ntse

Lub lens dav dav tua los ntawm lub kaum sab xis dav dua li lub lens li niaj zaus. Lub lens wide-angle tuaj yeem ntes ntau qhov ntau ntawm scenes thiab tag nrho suav nrog qhov dav dav rau hauv tus ncej. Nyob rau hauv kev sib piv, ib txwm lo ntsiab muag muaj ib tug nqaim shooting lub kaum sab xis thiab yog haum rau ntes nruab nrab-nyob deb scenes.

Pkev pom zoo

Txij li thaum lub koob yees duab ntawm lub lens wide-angle loj dua, cov khoom nyob ze yuav tshwm loj dua thaum lub keeb kwm yav dhau tshwm me me. Qhov kev xav pom no yog hu ua "wide-angle distortion" thiab ua rau cov khoom nyob ze rau qhov deform thiab tshwm sim dua.

Hauv qhov sib piv, qhov kev xav ntawm cov lo ntsiab muag ib txwm muaj tseeb dua, thiab qhov sib piv ntawm qhov ze-up thiab keeb kwm yav dhau los ze dua rau qhov kev soj ntsuam tiag tiag.

4.Qhov sib txawv ntawm lub lens wide-angle thiab fisheye lens

Qhov sib txawv ntawm lub kaum sab xis dav thiab lub lens fisheye feem ntau yog nyob rau hauv qhov kev pom thiab cuam tshuam:

Saib tau ntau yam

A wide-angle lensfeem ntau muaj qhov dav ntawm qhov pom dua li lub lens ib txwm, tso cai rau nws los ntes ntau qhov chaw. Nws lub kaum sab xis pom yog feem ntau ntawm 50 degrees thiab 85 degrees ntawm 35mm lub koob yees duab puv npo.

Lub lens fisheye muaj qhov dav dav ntawm qhov pom thiab tuaj yeem ntes cov xwm txheej ntau dua 180 degrees, lossis txawm tias cov duab panoramic. Yog li ntawd, nws lub kaum sab xis pom tuaj yeem nyob deb dua li ntawm lub lens dav, uas feem ntau yog 180 degrees ntawm lub koob yees duab puv.

Cov duab thaij nrog fisheye lens

Distortion nyhuv

Wide-angle lo ntsiab muag ua kom muaj kev cuam tshuam tsawg dua thiab tuaj yeem nthuav qhia qhov tseeb ntau qhov sib piv thiab kab duab. Nws me ntsis dilates cov khoom nyob ze, tab sis tag nrho cov nyhuv distortion yog me me.

Lub lens fisheye muaj qhov cuam tshuam pom tseeb, uas yog tus cwj pwm los ntawm kev nthuav dav ntawm cov khoom nyob ze, thaum cov khoom nyob deb zuj zus, ua rau muaj qhov nkhaus lossis kheej kheej, uas qhia txog qhov tshwj xeeb fisheye.

Lub hom phiaj thiab cov xwm txheej siv tau

Lub lens wide-angle yog haum rau shooting scenes uas yuav tsum tau ib tug dav teb ntawm saib, xws li toj roob hauv pes, nroog architecture, sab hauv tsev shooting, thiab lwm yam. Nws yog feem ntau siv los ntes cov cheeb tsam loj ntawm scenery thaum tuav lub siab xav thiab realism.

Hauv qhov sib piv, cov lo ntsiab muag fisheye yog qhov tsim nyog rau kev tsim cov kev pom pom tshwj xeeb thiab tuaj yeem tsim qhov cuam tshuam cuam tshuam rau hauv cov xwm txheej tshwj xeeb, xws li cov chaw me me hauv tsev, chaw ua si, lossis kev tsim duab kos duab.