Anamorphic Lens: Nws Yog Dab Tsi? Hom Kev Txuas Thiab Cov Lus Qhia Rau Lawv Siv

2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2023-12-16 05:41

Cov kws tshaj lij paub txog ntau hom thev naus laus zis. Anamorphic optics tau siv hauv kev ua yeeb yaj kiab ntawm cov yeeb yaj kiab loj. Lub lens no tau muab rau hauv ntau qhov sib txawv thiab muaj ntau qhov zoo. Muaj qee qhov kev zais kom kawm paub yuav ua li cas thiaj tua tau lub lens kom tau txais kev txhaj tshuaj zoo.

Nws yog dab tsi?

Cov thawj coj tau pib ntev los xav txog yuav ua li cas kom haum ntau qhov chaw rau hauv tus ncej. Txuj ci 35mm zaj duab xis tau ntes thaj chaw uas tsuas yog nyob hauv qhov pom . Cov iav lo ntsiab muag tseem tsis muaj peev xwm xav tau, yog li cov iav anamorphic yog qhov kev daws teeb meem. Nrog kev pab ntawm qhov tshwj xeeb qhov muag, lub thav duab tau muab kab rov tav, qhov no tau kaw ntawm zaj duab xis, thiab tom qab ntawd tso tawm los ntawm lub projector ntawm lub vijtsam. Tom qab ntawd tau siv lub lens anamorphic, ua tsaug uas lub thav duab tau nthuav dav mus rau qhov dav dav.

Ib qho tshwj xeeb ntawm lub lens no yog nws lub peev xwm los ua kom cov duab kom pom lub dav dua . Ua tsaug rau cov cuab yeej no, koj tuaj yeem tua cov yeeb yaj kiab dav-dav nrog cov koob yees duab SLR yam tsis ntshai kev txawv txav.

Lub kaum sab xis pom ntawm lub lens muab qhov sib piv ntawm 2.39: 1, kev yees duab kab rov tav.

Nws tau ntseeg tias lub lens anamorphic muaj peev xwm muab qhov tob tob ntawm daim teb. Cov txiaj ntsig ntawm qhov kho qhov muag no tau siv hauv ntau cov yeeb yaj kiab kev ntseeg thiab tseem siv tau los ntawm cov kws tshaj lij kev yees duab thiab kws ua yeeb yaj kiab.

Cov neeg ua yeeb yaj kiab ua yeeb yaj kiab nyiam lub lens rau nws cov teebmeem tshwj xeeb . Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias anamorphic optics kuj tseem tuaj yeem siv hauv kev yees duab. Qhov txiaj ntsig tseem ceeb suav nrog kev muaj peev xwm los ua cov yeeb yaj kiab dav-dav siv cov cuab yeej txheem thiab cov khoom siv tsom iav pheej yig. Thaum lub sijhawm tua, cov qoob loo ntawm cov thav duab txo qis, thiab kev ruaj ntseg ntsug nce.

Saib

Lub 2x lens muaj peev xwm ua ob npaug ntawm cov kab kab rov tav. Cov iav nrog cov cim no feem ntau siv ua ke nrog lub ntsuas nrog qhov sib piv ntawm 4: 3 . Cov thav duab tua nyob rau hauv hom no coj mus rau tus qauv dav dav ntawm qhov sib piv. Tab sis yog tias koj siv lub lens zoo li HD matrix (16: 9 piv), qhov tshwm sim yuav yog lub thav duab dav, uas ib txwm tsis siv tau.

Txhawm rau zam qhov cuam tshuam no, nws yog qhov zoo tshaj los xaiv cov lo ntsiab muag anamorphic cim nrog 1.33x cov cim . Tom qab ua tiav, cov thav duab zoo nkauj, tab sis daim duab zoo tau txo me ntsis.

Reflections tuaj yeem tshwm hauv daim duab, yog li cov kws tshaj lij ua yeeb yaj kiab siv lub koob yees duab nrog 4: 3 matrix.

Cov qauv nrov

Txog rau kev ua yeeb yaj kiab, koj tuaj yeem siv SLR Magic Anamorphot-50 1.33x anamorphic txuas. Nws txuas ncaj qha rau sab xub ntiag ntawm lub lens, yog li ua kom nrawm cov duab kab rov tav los ntawm 1.33 zaug . Kev pab them nqi tau nce ntxiv 25%, txhua cov ntsiab lus tau pom meej. Nrog rau cov kho qhov muag no, koj tuaj yeem thaij duab zoo nkauj nrog qhov tseem ceeb elliptical. Kev tsom xam tau hloov kho ntawm qhov deb ntawm ob meters, koj tuaj yeem kho nws nrog lub nplhaib, thiab tseem xaiv ib qho ntawm cov qauv uas tau nthuav tawm.

LOMO Anamorphic tau suav hais tias yog lub iav tsom iav uas tau tsim tawm hauv 80s ntawm lub xyoo pua xeem . Cov iav no muaj qhov ua tau zoo tshaj plaws nrog lub teeb pom kev zoo thiab bokeh. Lub ntsiab lus anamorphic nyob nruab nrab ntawm cov txheej txheem kheej kheej, qhov ua kom pom tseeb yog tswj los ntawm cov khoom kheej kheej. Tus qauv tsim kom ntseeg tau qhov ua pa tsawg tshaj plaws thaum teeb tsa.

Qhov ntau suav nrog puag ncig thiab cov iav tsom iav nyob ntawm tus kheej xav tau.

Optimo Anamorphic 56-152mm 2S qhov sib txawv focal ntev lens yog lub teeb pom kev zoo thiab kev cog lus . Qhov kev xaiv no zoo tshaj plaws rau cov koob yees duab digital xinesmas niaj hnub no. Ntawm qhov zoo tseem ceeb yog kev daws teeb meem zoo thiab tsim xim kom raug. Tsis muaj kev ua pa thaum ua kom pom tseeb.

Lwm tus neeg sawv cev ntawm lo ntsiab muag anamorphic yog Cooke Optics, uas tau siv hauv TV thiab ua yeeb yaj kiab . Kho qhov muag thev naus laus zis tso cai rau kev txhaj tshuaj ze, nthuav cov duab mus txog 4 zaug. Luam xim, zoo li qhov tob ntawm daim teb, yuav tsis cuam tshuam. Cov qauv nrog qhov ntev focal los ntawm 35 txog 140 hli muaj lub ntsej muag lub ntsej muag zoo li lub qhov muag tsis hais tus nqi qhov nkag.

Cov kev kho qhov muag zoo no tau siv dav hauv txheej txheej ntawm "Kev Ua Si ntawm Thrones", "Fargo" thiab lwm yam TV nrov.

Yuav thov li cas?

Ua haujlwm nrog lub lens no tsis yog ib qho yooj yim, tshwj xeeb tshaj yog tias koj tsis muaj kev paub dhau los. Nws yuav siv dag zog ntau thiab sijhawm kom tau raws li daim duab uas koj xav tau . Nws raug nquahu kom ua txhua yam manually. Yog tias siv daim ntawv txuas, nws yuav tsum txuas ncaj qha rau ntawm lub lens. Tom ntej no, koj yuav tsum tsom mus rau qhov kho qhov muag los ntawm kev kho lub qhov muag. Qhov chaw ntawm qhov kev kawm yuav tsum nyob deb li deb kom lub thav duab pom meej. Qee tus kws yees duab muab cov iav los cais lawv ntawm txoj kab, uas ua rau tsom mus tau yooj yim dua.

Thaum lub sijhawm tua, kev tsom mus tas li yog nqa tawm los ntawm kev sib hloov tsis yog tsuas yog qhov txuas, tab sis kuj yog lub thoob ntawm lub lens nws tus kheej . Nov yog qhov xav tau kev pab ntawm tus pabcuam. Anamorphic optics yuav tsum raug xaiv raws tus tsim lub koob yees duab hom thiab focal ntev. Cov xov xov rau lub lens lim yuav tsum tsis tig, qhov no yog txoj cai yuav tsum tau ua. Txhawm rau ua tiav qhov txiaj ntsig zoo, koj yuav tsum xyuas kom qhov kev ncua deb ntawm qhov txuas thiab sab xub ntiag ntawm lub lens yog tsawg.

Txhawm rau tso tawm qhov kawg ntawm cov yeeb yaj kiab, koj yuav tsum tau teeb tsa cov coefficients rau ncab cov kab rov tav, thiab tom qab ntawd yuav tsis muaj qhov txawv txav.

Txhawm rau nce lub kaum sab xis pom, lub taub hau yuav tsum tau tig 90 degrees, thiab tom qab ntawd qhov kev sib zog yuav yog ntsug . Hauv qhov no, cov duab ntawm lub thav duab yuav tig mus ua plaub fab.

Txhawm rau xaiv qhov zoo anamorphic optics, koj yuav tsum paub tias qhov no yog cov cuab yeej tshaj lij, uas tsis yooj yim mus nrhiav, dua li, koj yuav tau nqis peev nyiaj ntau. Tab sis qhov tshwm sim uas nws muab rau hauv cov txheej txheem ntawm kev ua yeeb yaj kiab dhau qhov kev cia siab. Yog tias koj xav tsim koj tus kheej cov yeeb yaj kiab loj-loj, koj ua tsis tau yam tsis muaj cov cuab yeej zoo li no.