Tej zaum koj yuav tau hnov lub koob yees duab viewfinder hu ua diopter, tab sis qhov tseeb, nws tsis yog. Lub koob yees duab digital viewfinder yog ib qho kev pom ntawm sab nraub qaum ntawm DSLR (digital single lens reflex) lub koob yees duab uas tso cai rau tus kws yees duab pom cov duab uas yuav raug ntes. Tab sis kuj tseem muaj ntau ntxiv rau lub koob yees duab viewfinder. Muaj ntau hom, thiab sib txawv mechanisms. Nov yog yam koj yuav tsum paub txog ntau yam viewfinders.
Dab tsi yog Viewfinder?
Lub koob yees duab digital viewfinder yog ib feem ntawm lub koob yees duab uas yog siv los teeb tsa thiab teeb duab. Nws feem ntau yog nyob rau sab nraum qab ntawm lub koob yees duab, thiab tuaj yeem yog qhov pom qhov muag pom lossis digital, lossis hluav taws xob saib (EVF).
- Optical Viewfinder: Ib qho kev pom qhov muag pom feem ntau pom ntawm DSLR koob yees duab. Koj yuav paub tias nws yog qhov muag qhov muag nyob tom qab ntawm lub koob yees duab, feem ntau mus rau sab saum toj. Qhov no yog ib qho kev saib xyuas uas siv ib txoj hauv kev los qhia rau tus kws yees duab saib ntawm qhov xwm txheej los ntawm lub lens ntawm lub koob yees duab. Optical viewfinders kuj tseem tuaj yeem qhia qee cov ntaub ntawv digital hauv thaj chaw saib txog lub koob yees duab teeb tsa lossis kev tua cov ntaub ntawv hais txog qhov xwm txheej uas lub lens tsom rau. Thiab optical viewfiders ua haujlwm zoo nyob rau hauv ob qho tib si ci thiab tsis tshua muaj teeb pom kev zoo.
- Digital Viewfinder: Cov no kuj tseem hu ua electronic viewfinders (EVFs) vim tias lub qhov muag pom digital qhia pom cov duab zoo tshaj plaws ntawm cov duab taug kev los ntawm lub koob yees duab lens. Qhov no txhais tau hais tias cov duab koj pom los ntawm lub qhov muag pom digital yuav tsis yog qhov pom tseeb uas lub lens ntes tau. Digital viewfinders muaj qee qhov zoo, txawm li cas los xij. Piv txwv li, lub qhov muag pom digital yuav qhia tau qhov tseeb dua ntawm cov teeb pom kev zoo rau qhov chaw uas yog tsom.
Tseem muaj lwm hom kev pom, txawm hais tias nws feem ntau lumped mus rau hauv qeb digital viewfinder: lub vijtsam saib. Qhov no yog qhov screen nyob rau sab nraum qab ntawm feem ntau DSLR koob yees duab uas cov kws yees duab tuaj yeem hloov chaw, scroll los ntawm cov duab ntes, thiab qee zaum, ua qee qhov kev hloov me me lossis kho cov duab. Lub vijtsam no, uas feem ntau yog li ntawm ob mus rau ob thiab ib nrab ntiv tes square, kuj tuaj yeem siv los ua ib qho chaw thiab tsom rau lub koob yees duab.
Thiab, qee zaum, lub vijtsam saib lub ntsej muag yog qhov kev xaiv zoo dua li qhov muag pom lossis digital viewfinder nyob ntawm lub cev ntawm lub koob yees duab. Piv txwv li, yog tias koj tab tom tua nyob rau hauv qhov chaw uas nws ua tau txawv txawv los tuav lub koob yees duab rau ntawm koj lub ntsej muag, lub ntsej muag lub ntsej muag yuav pab koj kom pom kev zoo dua, tshwj xeeb tshaj yog tias nws yog ib qho kev nthuav qhia uas tuaj yeem txav mus rau sab laug thiab sab xis thiab nce thiab nqis.
How a Viewfinder ua haujlwm
Yuav ua li cas lub qhov pom kev ua haujlwm yog txiav txim siab los ntawm hom kev pom koj siv. Lub qhov muag pom qhov muag siv lub pentaprism lossis pentamirror los cuam tshuam cov duab taug kev los ntawm lub koob yees duab lens mus txog qhov pom. Yog hais tias lub optical viewfinder siv lub pentaprism, ces cov duab yog reflected los ntawm lub prism. Qhov no feem ntau yog qhov high-end DSLR lub koob yees duab viewfinders ua haujlwm.
Kub-kawg thiab nkag-theem DSLR koob yees duab feem ntau siv lub pentamirror viewfinder system, qhov twg cov duab taug kev los ntawm lub lens yog reflected rau hauv lub viewfinder siv ib tug series ntawm iav. Cov iav no feem ntau yog yas, thiab tuaj yeem hnov txog thaum lub koob yees duab shutter khawm nias. Qhov ntawd yog vim lub tshuab pentamirror muaj daim iav nyob ncaj nraim rau pem hauv ntej ntawm cov duab sensor, thiab nws yuav tsum tig thiab tawm ntawm txoj kev rau cov duab kom ntes tau.
Ob hom optical viewfinders ua haujlwm zoo heev rau kev ntes cov duab raug raws li ntev raws li lub diopter, uas yog lub lens nyob rau hauv pem hauv ntej ntawm viewfinder, yog kho kom zoo rau tus kws yees duab lub zeem muag.
Cov khoom siv hluav taws xob saib xyuas ua haujlwm zoo ib yam, tshwj tsis yog cov duab uas cuam tshuam rau hauv qhov pom tsis yog cov duab uas mus los ntawm lub koob yees duab lens. Hloov chaw, nws yog tus sawv cev digital ntawm cov duab ntawd.
Kev poob qis ntawm cov khoom siv hluav taws xob yog tias lawv siv roj teeb lub zog, uas ua rau lub sijhawm luv luv uas koj tuaj yeem tua tau, thiab yog tias qhov kev daws teeb meem ntawm lub qhov muag pom digital tsis zoo li qhov kev daws teeb meem ntawm lub koob yees duab, tej zaum koj yuav tsis yog. pom cov duab tseeb ntawm qhov chaw koj sim thaij duab.
Raws li lub koob yees duab mirrorless tau nrov dua, cov duab pom digital tau dhau los ua ntau qhov chaw vim tias lub koob yees duab tsis muaj iav tsis muaj qhov pom qhov muag pom.
Qhov twg zoo dua, kho qhov muag lossis lub ntsej muag digital?
Nws yog ib qho uas tus kws yees duab tshiab xav paub seb lub qhov muag pom lossis cov duab pom zoo tshaj plaws los siv. Qhov teeb meem yog, txhua qhov zoo dua hauv qee qhov xwm txheej.
Piv txwv li, lub qhov muag pom qhov muag pom zoo ib txwm zoo dua nyob rau hauv cov xwm txheej ci ntsa iab, vim tias nws pab txo qhov pom ntawm qhov muag pom kom koj tuaj yeem pom cov duab uas taug kev los ntawm koj lub lens zoo dua.
Txawm li cas los xij, yog tias koj tua nyob rau hauv cov teeb pom kev qis, lub qhov muag pom digital yuav ua tau txoj haujlwm zoo dua ntawm kev sawv cev ntawm lub teeb uas tau hla koj lub lens.
Feem ntau, feem ntau cov kws yees duab tshaj lij nyiam lub qhov muag pom qhov muag vim nws muab qhov tseeb tshaj plaws sawv cev ntawm cov duab uas tau taug kev los ntawm lub lens nyob rau ntau lub sijhawm. Lub optical viewfinder tseem muab txoj hauv kev los txhawm rau lub koob yees duab thaum koj tab tom tua, vim nws yuav tsum tau coj mus rau koj lub ntsej muag kom koj tuaj yeem saib los ntawm qhov pom. Qhov no, ua ke nrog ua kom koj lub luj tshib ze rau koj lub cev, tuaj yeem pab txhim kho lub koob yees duab thiab txo qhov kev co uas tuaj yeem tshwm sim yog tias koj tab tom sim tuav lub koob yees duab kom deb ntawm koj lub cev.
