Cov txheej txheem:
- Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub lens, nws ntau yam
- Yuav ua li cas tua nrog lub ntsej muag ntsej muag - lub hauv paus ntawm kev yees duab zoo
2024 Tus sau: Sierra Becker | [email protected]. Kawg hloov kho: 2024-02-26 05:10
Hauv kev kos duab ntawm kev yees duab muaj ntau ntau yam kev nthuav thiab txawv txawv thiab kev ua kom yuam kev uas tso cai rau tsis yog tsuas yog ua kom raug thiab zoo nkauj tso saib tag nrho cov kev zoo nkauj ntawm lub ntiaj teb, tab sis kuj tsim cov masterpieces tiag tiag. Ib txhia ntawm lawv zoo heev thiab zoo heev uas lawv zoo li zoo heev tej yam yees siv paintings. Tab sis kev kos duab tiag tiag tsis yog hloov cov duab dhau qhov kev lees paub, tab sis tsuas yog muab nws qhov tshwj xeeb ntxim nyiam nrog kev pab los ntawm me me tricks.
Lub lens fisheye yog qhov pom zoo rau ob qho tib si amateur thiab kws yees duab tshaj lij. Nws muaj lub kaum sab xis siab tshaj plaws ntawm qhov pom ntawm 180 °, thiab qhov tsis sib haum xeeb uas tshwm sim thaum tua ua rau muaj txiaj ntsig zoo thiab qub.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub lens, nws ntau yam
Lub lens fisheye tau muaj npe nyob rau xyoo 1906. Robert Wood pom tias txoj kev tau txais daim duab nrog nws, cov ntses pom lub ntiaj teb los ntawm hauv qab dej. Peb pom ib daim duab zoo sib xws hauv lub qhov rooj peephole. Distortion (distortion) muaj zog heev, tsuas yog ib cheeb tsam me me nyob rau hauv qhov chaw ntau dua los yog tsawg dua rau nws qhov tsis muaj tseeb. Siv nws ua ntej hauv huab cua, tsuas yog pom tag nrho lub ntuj ceeb tsheej.
Nws yog qhov nthuav tias txawm tias tam sim no xws li lub lens yog siv hauv kev tshawb fawb, thaum xav tau los ua kom pom lub kaum ntse ntse. Thiab rau cov kws yees duab amateur, nws tau dhau los ua qhov kev pom zoo, uas koj tuaj yeem tsim cov toj roob hauv pes lossis vaj tsev ua haujlwm, kev lom zem portraits thiab ntau ntxiv.
Muaj ob hom ntses ntsej muag sib txawv. Thawj ntawm lawv yog hu ua ncig, lossis ncig. Nws muab ib daim duab tiav rau hauv daim ntawv ntawm lub voj voog, tsim cov duab qub. Lub kaum sab xis ntawm nws lub zeem muag yog 180 °. Tab sis, qhov tseeb, nws ua haujlwm zoo ib yam li lwm lub lo ntsiab muag, tsuas yog ib feem ntawm lub sensor - lub duab plaub uas haum rau txoj kab uas hla ntawm lub lens nws tus kheej. Cov duab plaub no ces dhau los ua ib daim duab puag ncig. Feem ntau, cov khoom siv ntawm hom no yog tsim rau hom 35 hli. Lawv focal ntev yog 8mm.
Dab tsi ntxiv yuav lub lens fisheye? Qhov kev xaiv thib ob yog hu ua kab pheeb ces kaum lossis tag nrho cov duab lens. Nyob rau hauv cov ntaub ntawv no, tag nrho cov sensor cheeb tsam yog siv, thiab lub kaum sab xis ntawm view yog 180 ° diagonally. Nws yuav yog kwv yees li 147 ° kab rov tav thiab 95 ° ntsug.
Cov hom lo ntsiab muag tau muab faib raws li kev cai - txhua yam nyob ntawm seb qhov twg ntawm lub sensor siv. Yog li ntawd, tus qauv fisheye lens tuaj yeem muab txhua yam, qhov sib txawv tsuas yog nyob rau hauv qhov loj ntawm lub sensor nws tus kheej. Cov khoom siv no kim heev, thiab qee zaum lawv sim hloov lawv nrog cov hloov pauv yooj yim. Lub converter tau muab tso rau ntawm lub lens tsis tu ncua, hloov pauv nws lub kaum sab xis pom. Lawv tso cai rau koj coj cov duab dav dav ntawm ib qho twgkoob yees duab. Nyob rau tib lub sijhawm, txhawm rau kom cov duab zoo zoo, koj yuav tsum tau tua ntawm qhov aperture me me.
Yuav ua li cas tua nrog lub ntsej muag ntsej muag - lub hauv paus ntawm kev yees duab zoo
Ib qho ntxiv ntawm hom lo ntsiab muag no yog tias tsis muaj teeb meem nrog cov duab tsom. Vim thaj tsam loj ntawm kev sib cuag nrog lub teeb, daim duab yog qhov tseeb heev thiab nthuav tawm. Cov kab nruab nrab (kab rov tav thiab ntsug) tsis hloov pauv.
Cov nyhuv fisheye zoo nkauj heev thaum thaij duab saum ntuj. Hauv hav zoov, nruab nrab ntawm cov tsev, lossis tsuas yog lub ntuj dome xwb, koj tuaj yeem tua nrog lub voj voog hom.
Dav nam piv tso cai rau koj thaij duab ze ntawm cov khoom vaj tsev. Txhawm rau ua kom cov duab sib haum xeeb, koj yuav tsum sim ua raws li nws cov thav duab - txuas kab rov tav lossis ntsug nrog cov ntsiab lus hauv tsev.
Funny portraits lossis tsuas yog cov duab lom zem tau txais thaum tua nrog lub lens fisheye. Lub hauv paus cheeb tsam yog qhov tsawg tshaj plaws distorted, yog li qhov no yog qhov uas cov ntsiab lus yuav tsum tau muab tso rau. Plaub lub ces kaum yog thaj chaw uas muaj kev cuam tshuam ntau tshaj plaws.
Pom zoo:
Cov ntsiab lus ntawm kev ua haujlwm nrog lub koob yees duab, hom tseem ceeb uas txhua tus kws yees duab xav tau: aperture qhov tseem ceeb thiab qhov tob ntawm qhov chaw
Aperture qhov tseem ceeb yog ib qho tseem ceeb tshaj plaws uas txhua tus kws yees duab, suav nrog cov pib tshiab, yuav tsum siv tau. Qhov no yog ib qho ntawm cov qauv tsim nyog rau ntau cov duab
Tshaj tawm rau kev yees duab tua hauv hav zoov. Kev sib ntsib yees duab hauv hav zoov thaum lub caij ntuj sov thiab lub caij nplooj zeeg - cov tswv yim zoo nkauj rau kev tshoov siab
Hav zoov yog ib qho kev xav ntawm qhov xwm txheej thiab daim ntaub zoo nkauj rau tus kws yees duab. Tsis pub dhau ob peb teev, nws tuaj yeem hloov nws qhov tsos - los ntawm qhov tsis paub thiab ntshai mus rau qhov majestic thiab poetic. Xav tau ib lub tswv yim rau kev yees duab tua hauv hav zoov? Peb muaj ntau ntawm lawv - saib thiab tau txais kev tshoov siab los tsim koj cov masterpieces
Qhov txawv ntawm lub koob yees duab SLR thiab lub koob yees duab digital yog dab tsi thiab vim li cas lo lus nug no raug teeb tsa tsis raug?
Nyob rau hauv tsab xov xwm peb yuav tham txog dab tsi yog tus yam ntxwv ntawm cov koob yees duab digital thiab analog SLR
Ntxhais rau kev yees duab tua. Lub ntsiab ntawm kev yees duab tua rau ib tug ntxhais. Ntsiab lus rau kev yees duab tua tom tsev
Nyob rau hauv kev tau txais cov koob yees duab zoo tshaj plaws, tsis yog cov cuab yeej tshaj lij xwb tseem ceeb, tab sis kuj yog ib txoj hauv kev zoo rau cov txheej txheem. Cov ntsiab lus rau kev yees duab tua yog qhov kawg! Nws yuav siv sij hawm lub davhlau ntawm kev zoo nkauj thiab qee qhov ua siab loj
Chess: keeb kwm, lus siv. Lub neej yog kev ua si: zugzwang yog qhov kev txhawb siab ntxiv, tsis yog qhov kawg
Chess thiab checkers yog ib qho ntawm cov kev ua si niaj hnub nrov tshaj plaws. Nws yog ib qho nyuaj rau nrhiav tau ib tug neeg niaj hnub uas tsis tau nyob rau hauv nws lub neej tsiv cov duab nyob ib ncig ntawm lub rooj tsavxwm dub thiab dawb, xav los ntawm ingenious maneuvers. Tab sis ob peb tus neeg, tshwj tsis yog rau cov kws tshaj lij, paub txog chess terminology. Txawm li cas los xij, cov ntsiab lus no feem ntau siv los piav txog cov xwm txheej tiag tiag hauv pej xeem lub neej. "Zugzwang" yog ib lo lus zoo li no