Fisheye, lossis fisheye, yog ib hom kev sib txawv ntawm cov dav-lub lens. Nws peculiarity yog tias lub kaum sab xis saib hauv no optics yog 180 degrees. Ua tsaug rau qhov no, nrog kev pab ntawm fisheye lens, koj tuaj yeem coj toj roob hauv pes txawv txawv, hom duab lossis duab kos duab. Feem ntau, cov kws thaij duab tshwj xeeb tshaj yog nyiam rau lub lens no los ntawm qhov kho qhov muag distortion.
Seb vim li cas koj xav tau fisheye lens
Yog tias koj twb muaj lub koob yees duab, tom qab ntawd xaiv lub ntsej muag fisheye rau nws feem ntau yuav tsis yog qhov nyuaj, vim tias lawv muaj ntau yam me me. Nrhiav qhov ntau ntawm cov qauv uas muaj tshwj xeeb rau koj hom koob yees duab.
Koj txoj kev xaiv yuav cuam tshuam los ntawm vim li cas koj xav tau lub lens. Feem ntau, siv fisheye, lawv tua ob qhov toj roob hauv pes thiab sab hauv, qhov chaw uas pom tau dav dav yuav tsum muaj, lossis cov chaw uas pom qhov muag tsis pom kev (nyob rau hauv lwm yam lus, cov teeb meem distortion) los ua ntej, lawv tau siv raws li txheej txheem kev kos duab.
Rau cov duab toj roob hauv pes, koj tuaj yeem yuav lub lens kho tshuab. Qhov no yuav txuag tau nws tus nqi. Qhov tsis zoo ntawm qhov kev xaiv no yog qhov koj yuav tsum tau teeb tsa tag nrho cov teeb meem ntawm tus kheej, tab sis txij li koj yuav muaj sijhawm rau qhov no, qhov no yuav cuam tshuam qhov zoo ntawm kev tua neeg nrog txoj kev zoo tshaj plaws. Txog kev thaij duab, ntawv thiab tshwj xeeb tshaj tawm cov duab thaij duab, koj yuav tsum tsis txhob yuav lub lens uas tsis muaj autofocus, koj pheej hmoo yuav ploj ntawm lub sijhawm zoo.
Ncej puab
Nws yuav tsum nkag siab tias fisheye, vim qhov tseeb tias nws yuav haum rau cov ncej ntau qhov chaw ntau dua li lub lens niaj zaus, tseem yuav txo tau qhov loj me ntawm cov ntsiab lus txhua yam, yog li nws yuav tig tawm tias cov ntsiab lus uas koj tsom yuav yuav tsum subtle.
Hauv lub ntsej muag fisheye, lossis fisheye, lub kaum sab xis ntawm kev tuav pov hwm yog 180 degrees, lub focal ntev yog 8 hli. Muaj ob hom ntses, kab pheeb ces kaum thiab ncig. Lub koob pheeb ces kaum tso cai rau koj kom tau 180 qib raws txoj kab pheeb ces kaum ntawm tus ncej, thaum lub voj voos ib qho, los ntawm kev tua, koj yuav tau txais ib lub voj voog kos rau hauv cov ncej - qhov no yuav yog qhov ntsej muag fisheye.
Kev xaiv ntawm lub ntsej muag fisheye tsis raug cuam tshuam, txawm tias koj muaj tag nrho kev nyab xeeb lossis cog qoob loo. Tsis zoo li lub ntsej muag dav ntawm lub ntsej muag, uas hloov mus rau hauv lub teeb qauv ntawm daim duab kev txiav txim siab, tus ntses-qhov muag tseem yog ntses nyob ntawm ib qho kev ntsuas. Tab sis qhov kev xaiv tuaj yeem cuam tshuam los ntawm cov qauv ntawm lub lens: yog tias nws tsis haum rau cov matrices nrog cov khoom siv qoob loo, ces nws yog qhov zoo dua tsis siv nws, txwv tsis pub koj muaj kev cuam tshuam cov teeb meem.
Neeg kho tshuab fisheye lo ntsiab muag
Mechanical fisheye lo ntsiab muag yog feem ntau yuav kom thiaj li txuag nyiaj. Piv txwv li, koj tuaj yeem yuav lub xaj xaj xaj xaj xaj rau Zenit "Zenitar", qhov zoo tshaj ntawm cov optics ntawm uas tsis yog qhov phem tshaj li cov khoom siv hluav taws xob niaj hnub. Nws tus nqi yog qhov kev txiav txim ntawm qhov ntau tsawg dua, feem ntau nws tsuas yog ob peb txhiab rubles, thaum lub lag luam fisheye lens yuav raug nqi ntau ntau kaum tawm txhiab tus. Lub tshuab siv kho tshuab, yog tias nws tsis yog lub "koob npe" koob yees duab, yuav tsum tau muab tso rau ntawm lub tshuab tshwj xeeb.
