Cov txheej txheem:

Lub lens fisheye yog qhov tseeb romance ntawm kev yees duab
Lub lens fisheye yog qhov tseeb romance ntawm kev yees duab
Anonim

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.

fisheye lens
fisheye lens

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

fisheye effect
fisheye effect

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.

fisheye lens
fisheye lens

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: