Dab tsi yog ib qhoLens FisheyeLub lens fisheye yog ib hom lens koob yees duab uas tsim los tsim kom pom tau dav dav ntawm ib qho chaw, nrog rau qhov pom kev tsis sib xws thiab sib txawv. Cov lens Fisheye tuaj yeem ntes tau qhov pom dav heev, feem ntau txog li 180 degrees lossis ntau dua, uas tso cai rau tus kws thaij duab thaij tau thaj chaw loj heev ntawm qhov chaw hauv ib qho kev thaij duab.

Lub lens fisheye

Cov iav Fisheye raug muab lub npe los ntawm lawv cov teebmeem distortion tshwj xeeb, uas tsim cov duab voj voog lossis cov duab zoo li lub thoob uas tuaj yeem ua kom pom tseeb thiab zoo nkauj heev. Cov teebmeem distortion yog tshwm sim los ntawm txoj kev uas lub lens refracts lub teeb thaum nws hla dhau cov iav nkhaus ntawm lub lens. Cov teebmeem no tuaj yeem siv los ntawm cov kws thaij duab los tsim cov duab tshwj xeeb thiab dynamic, tab sis nws kuj tuaj yeem yog qhov txwv yog tias xav tau cov duab zoo li ntuj dua.

Cov tsom iav Fisheye muaj ntau hom sib txawv, suav nrog cov tsom iav fisheye puag ncig, cov tsom iav fisheye cropped-circle, thiab cov tsom iav fisheye puv npo. Txhua hom tsom iav fisheye no muaj nws tus yam ntxwv tshwj xeeb thiab tsim nyog rau ntau hom kev thaij duab.

Tsis zoo li cov iav rectilinear,cov iav qhov muag ntsestsis yog tsuas yog piav qhia txog qhov ntev ntawm lub lens thiab qhov aperture xwb. Lub kaum sab xis ntawm qhov pom, txoj kab uas hla ntawm daim duab, hom kev tso tawm, thiab kev npog ntawm lub sensor txhua yam sib txawv ntawm cov no.

Cov hom kev siv hom ntawv

Cov iav qhov muag fisheye puag ncig

Cov iav fisheye thawj hom uas tau tsim tawm yog cov iav "circular" uas tuaj yeem tsim cov duab voj voog nrog lub zeem muag 180-degree. Lawv muaj qhov ntev focal luv heev, feem ntau yog txij li 7mm txog 10mm, uas ua rau lawv tuaj yeem thaij tau lub kaum sab xis dav heev ntawm qhov chaw.

Lub lens fisheye voj voog

Cov iav fisheye puag ncig yog tsim los tsim cov duab puag ncig ntawm lub koob yees duab lub sensor lossis lub dav hlau zaj duab xis. Qhov no txhais tau tias cov duab tshwm sim muaj lub voj voog nrog cov ciam teb dub nyob ib puag ncig thaj chaw puag ncig, tsim kom muaj qhov tshwj xeeb "fishbowl" effect. Cov ces kaum ntawm cov duab fisheye puag ncig yuav dub tag nrho. Qhov dub no txawv ntawm qhov maj mam vignetting ntawm cov iav rectilinear thiab teeb rau sai sai. Cov duab puag ncig tuaj yeem siv los tsim cov duab zoo nkauj thiab muaj tswv yim. Cov no muaj 180 ° ntsug, kab rov tav thiab kab pheeb ces kaum ntawm lub kaum sab xis. Tab sis nws kuj tuaj yeem yog qhov txwv yog tias tus kws thaij duab xav tau qhov sib piv ntawm lub duab plaub fab.

Lub voj voogcov iav qhov muag ntsesFeem ntau siv rau hauv kev thaij duab muaj tswv yim thiab kos duab, xws li kev thaij duab vaj tse, kev thaij duab abstract, thiab kev thaij duab kis las loj heev. Lawv kuj tseem siv tau rau kev siv scientific thiab technical uas xav tau qhov pom dav, xws li hauv kev kawm txog hnub qub lossis microscopy.

Cov iav tsom iav fisheye diagonal (aka full-frame lossis rectangular)

Thaum cov tsom iav fisheye tau nrov zuj zus hauv kev thaij duab dav dav, cov tuam txhab thaij duab tau pib tsim cov tsom iav fisheye nrog lub voj voog duab loj dua los npog tag nrho lub thav duab plaub fab. Lawv hu ua diagonal, lossis qee zaum "rectangular" lossis "full-frame", fisheyes.

Cov iav fisheye diagonal yog ib hom iav fisheye uas tuaj yeem tsim kom pom tau lub kaum sab xis dav dav ntawm qhov chaw nrog lub kaum sab xis ntawm 180 txog 190 degrees, thaum lub kaum sab xis thiab ntsug ntawm qhov pom yuav me dua. Cov iav no tsim cov kev pom uas tsis sib xws thiab ua rau pom ntau dhau, tab sis tsis zoo li cov iav fisheye voj voog, lawv puv tag nrho lub thav duab plaub fab ntawm lub koob yees duab lub sensor lossis lub dav hlau zaj duab xis. Yuav kom tau txais cov txiaj ntsig zoo ib yam ntawm cov koob yees duab digital nrog cov sensors me dua, yuav tsum muaj qhov ntev focal luv dua.

Qhov cuam tshuam ntawm kev cuam tshuam ntawm kab pheeb ces kaumlub lens qhov muag ntsestsim kom muaj ib qho zoo nkauj thiab tshwj xeeb uas cov kws thaij duab siv tau los thaij cov duab uas muaj zog thiab ntxim nyiam. Lub zeem muag uas nthuav dav tuaj yeem tsim kom muaj qhov tob thiab txav mus los hauv ib qho xwm txheej, thiab kuj tseem siv tau los tsim cov duab abstract thiab surreal.

Lub lens diagonal fisheye

Cov iav tsom iav fisheye los yog cov iav tsom iav portrait

Lub voj voog uas raug txiavcov iav qhov muag ntsesyog lwm hom lens fisheye uas muaj nyob, ntxiv rau cov lens fisheye puag ncig thiab cov lens fisheye puv npo uas kuv tau hais ua ntej. Ib qho nruab nrab ntawm cov duab diagonal thiab cov duab fisheye puag ncig muaj cov duab puag ncig uas tau kho kom zoo rau qhov dav ntawm hom zaj duab xis es tsis yog qhov siab. Yog li ntawd, ntawm txhua hom yeeb yaj kiab uas tsis yog square, cov duab puag ncig yuav raug txiav rau sab saum toj thiab hauv qab, tab sis tseem pom cov npoo dub ntawm sab laug thiab sab xis. Hom ntawv no hu ua "portrait" fisheye.

Lub lens fisheye uas muaj voj voog txiav

Cov tsom iav no feem ntau muaj qhov ntev ntawm kwv yees li 10-13 hli thiab thaj chaw pom ntawm kwv yees li 180 degrees ntawm lub koob yees duab qoob loo.

Cov tsom iav fisheye uas muaj voj voog txiav yog cov kev xaiv pheej yig dua piv rau cov tsom iav fisheye puv npo, thiab lawv muab qhov pom tshwj xeeb nrog cov nyhuv cuam tshuam voj voog.

Cov iav me me fisheye

Cov koob yees duab digital me me, tshwj xeeb tshaj yog thaum siv ua lub koob yees duab ruaj ntseg, feem ntau muaj cov iav fisheye kom npog tau zoo tshaj plaws. Cov iav fisheye me me, xws li cov iav M12 fisheye thiab cov iav M8 fisheye, yog tsim los rau cov sensors me me uas feem ntau siv hauv cov koob yees duab ruaj ntseg. Cov hom sensor duab nrov uas siv suav nrog 1/4″, 1/3″, thiab 1/2″. Nyob ntawm thaj chaw ua haujlwm ntawm lub sensor duab, tib lub lens tuaj yeem tsim ib daim duab voj voog ntawm lub sensor duab loj dua (piv txwv li 1/2″), thiab ib daim duab puv ntawm ib qho me dua (piv txwv li 1/4″).

Cov duab piv txwv uas CHANCCTV's M12 thaij taucov iav qhov muag ntses:

Cov duab piv txwv uas CHANCCTV's M12 fisheye lenses-01 tau thaij

Cov duab piv txwv uas CHANCCTV's M12 fisheye lenses-02 tau thaij

Cov duab piv txwv uas CHANCCTV's M12 fisheye lenses-03 tau thaij