2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2023-12-16 05:41
Muaj ntau hom kev yees duab zoom. Cov neeg uas nyob deb ntawm kev kos duab, thiab cov uas tshiab rau kev lag luam no, tsis nkag siab me ntsis txog lub tswv yim no txhais li cas.
Nws yog dab tsi?
Lo lus zoom hauv kev txhais ua lus Lavxias txhais tau tias "duab nthuav dav". Thaum xaiv lub koob yees duab, tib neeg feem ntau ua tib zoo saib rau qhov sib piv, qhov tseeb dua, rau tus lej pixels . Tab sis qhov ntsuas no tsis tuaj yeem hu ua lub ntsiab. Cov txheej txheem xaiv tseem ceeb yog optics. Kev ua haujlwm zoom yog qhov tseem ceeb heev.
Yog ua tau, sab laj nrog kws yees duab tshaj lij kom pom qhov kev xaiv twg yog qhov zoo tshaj . Ua ntej yuav lub koob yees duab, tshawb xyuas qhov sib txawv xaiv. Qhov no yog ib qho ntawm cov yam ntxwv tseem ceeb ntawm lub lens, nws nyob ntawm qhov ntev focal. FR tau qhia hauv millimetres - qhov no yog qhov deb ntawm nruab nrab ntawm lub lens mus rau lub focal point.
Qhov ntsuas no ib txwm qhia ntawm lub lens hauv ob tus lej. Lub tswv yim ntawm kev nthuav dav yog siv rau cov koob yees duab nrog hloov pauv FR.
Ntau yam
Cov neeg muag khoom hauv khw muag khoom ib txwm hais tias zoom qhia pom pes tsawg zaus cov txheej txheem tuaj yeem nthuav cov ncauj lus. FR ntawm 50 hli yog qhov pom zoo. Piv txwv li, yog hais tias qhov ntev focal tau hais yog 35-100mm, qhov txiaj ntsig zoom yuav yog 3. Daim duab no tau txais los ntawm kev faib 105 los ntawm 35.
Qhov loj hauv qhov no yuav yog 2, 1. 105 mm yuav tsum tau muab faib los ntawm qhov deb uas yooj yim rau tib neeg qhov muag - 50 mm. Vim li no, qhov loj ntawm lub koob yees duab lub zeem muag tseem tsis tau qhia ntau npaum li cas nws yog qhov tseeb los nthuav cov ncauj lus. Cov hom hauv qab no nthuav tawm.
- Kho qhov muag.
- Cov.
- Superzoom.
Hauv thawj kis, tus neeg raug kaw ua yeeb yaj kiab ze lossis thim rov qab vim yog kev txav chaw ntawm cov iav hauv lub lens. Lwm yam ntxwv ntawm lub koob yees duab tsis hloov . Cov duab yuav zoo. Hom kev kho qhov muag tau qhia kom siv thaum tua. Thaum xaiv cov txheej txheem, tsom mus rau tus nqi no.
Ntau tus kws yees duab tsis txaus ntseeg txog kev nthuav dav digital . Thaum nws tau siv rau hauv tus txheej txheem, ib qho tseem ceeb tau raug tshem tawm ntawm daim duab, daim duab tau nthuav dav thoob plaws thaj tsam ntawm daim ntawv. Yog tsis muaj kev nthuav dav tiag ntawm cov ncauj lus. Cov txiaj ntsig zoo ib yam tuaj yeem ua tiav hauv lub khoos phis tawj los ntawm kev nthuav cov duab. Tab sis kev nce ntxiv yog fraught nrog txo qis hauv kev puas tsuaj ntawm qhov txiav tawm ib feem.
Muaj ntau lub koob yees duab superzoom tau muag . Cov cuab yeej zoo li no hu ua ultrazoom. Qhov kho qhov muag pom hauv cov qauv lub koob yees duab no ntau dua 50x.
Ultrazoom los ntawm cov tuam txhab nto moo xws li Canon thiab Nikon.
Cov Lus Qhia Xaiv
Hauv cov koob yees duab, kho qhov muag ua lub luag haujlwm tseem ceeb. Thaum yuav khoom siv rau kev yees duab, ib txwm saib tus nqi no . Nws nyuaj rau muab cov lus pom tseeb rau kev yuav lub koob yees duab uas muab cov duab zoo tshaj plaws. Qhov zoo ntawm daim duab cuam tshuam tsis yog los ntawm kev nthuav dav thiab tus lej ntawm cov pixels, tab sis kuj los ntawm kev txawj ntawm tus kws yees duab, cov yam ntxwv ntawm cov khoom raug tua.
Nws tau pom zoo kom muab qhov nyiam rau qhov kho qhov muag pom, vim tias qhov sib txawv tseem muaj tam sim no . Thaum xaiv cov cuab yeej, saib qhov focal ntev ntawm cov iav. Ua ntej yuav lub koob yees duab, txiav txim siab seb yuav tua hom twg nrog nws. Raws li qhov no, koj yuav tsum txiav txim siab.
Yog tias koj xav tau lub koob yees duab los thaij duab ntawm cov phooj ywg thiab tsev neeg, xaiv tus qauv uas muaj lub ntsej muag dav . Hauv cov xwm txheej zoo li no, tsis tas yuav tsum nthuav dav loj. Tus nqi ntawm 2x lossis 3x yog txaus los tua thaum hnub yug thiab lwm hnub so hauv tsev. Yog tias koj npaj yuav tua lub ntuj zoo nkauj, muab qhov nyiam rau lub koob yees duab nrog kev nthuav dav ntawm 5x lossis 7x. Thaum tua cov dej thiab roob, tuav lub koob yees duab kom ruaj khov thiab zam kev cuam tshuam thiab qhov muag plooj.
Thaum yuav tsum tau txhaj tshuaj tiv thaiv kab mob, nws raug nquahu kom txav mus ze rau cov khoom siv es tsis txhob nce lub ntsej muag, txwv tsis pub lub zeem muag yuav nqaim, cov duab yuav tig mus tsis raug. Txog kev txhaj tshuaj ntev, yuav tsum muaj 5x lossis 7x zoom, nws yuav tso cai rau koj khaws cia txhua yam.
Txhawm rau ntes cov khoom me me nyob ntawm qhov deb zoo, koj xav tau kev nthuav dav tsawg kawg 10x.
Phau ntawv qhia siv
Nws raug nquahu kom tua lub digital zoom hauv lub koob yees duab teeb tsa thaum tua. Koj tsis tuaj yeem hloov pauv kev tsim cov ntawv sib dhos los ntawm kev nthuav tawm lossis tawm ntawm cov khoom - kawm txoj cai no . Siv cov digital zoom nrog ceev faj heev. Nws siv tau tso cai tsuas yog hauv cov xwm txheej uas matrix muaj kev daws teeb meem siab. Yog tias tsim nyog, nws tsim nyog thaij duab nrog cov khoom ze dua. Nkag siab qhov zoom yog dab tsi yuav ua rau nws yooj yim dua los siv qhov kev xaiv no.
Pom zoo:
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