Daim iav tsis muaj lub ntsej muag tau tshwm sim ntawm cov khoom lag luam yees duab tau ntev thiab nyob rau xyoo tas los no, hais txog lawv cov yam ntxwv, lawv tau ze rau ntawm cov duab SLR. Yog li no, thaum xaiv lub koob yees duab, koj yuav tsum them sai sai rau ob hom koob yees duab, thiab txhawm rau kom nkag siab qhov zoo ntawm lawv txhua tus, koj yuav tsum paub tias lawv txawv li cas.
Yog tias koj tso lub koob yees duab ob ntawm ib sab, SLR thiab tsom iav, tom qab ntawd tsuas yog ib qho txawv yuav tam sim ntawd ntes koj lub qhov muag - qhov no yog qhov sib txawv ntawm qhov loj me. Qee lub koob yees duab tsom iav me me thiab sib dua. Qhov no tau ua tiav vim tsis muaj pentaprism, tsom lub teeb thiab tsom iav hauv cov tsev. Ntxiv thiab, feem ntau cov tsom iav tsis muaj qhov muag pom.
Hauv cov SLR koob yees duab, lub teeb flux dhau los ntawm lub lens ntsia lub iav, tsom nws mus rau hauv pentaprism, uas, nyeg, rov cuam tshuam lub teeb rau hauv qhov pom. Autofocusing yog nqa tawm siv tshwj xeeb sensors, uas lub teeb ntog los ntawm ib daim iav ntxiv. Thaum lub sijhawm tua, daim iav nce, thaiv lub qhov pom ntawm lub ntsej muag, thiab lub teeb flux nkag hauv qhov matrix.
Cov qauv ntawm ib lub koob yees duab tsom iav yog qhov yooj yim dua. Lub teeb flux dhau ntawm lub lens nkag mus rau hauv matrix ncaj qha. Los ntawm nws, cov duab yog kis hauv lub sijhawm tiag tiag rau LCD saib.
Txhua hom koob yees duab tau nws tus kheej pros thiab cons koom nrog cov qauv nta. Hauv cov ntawv luv luv, cov tsom iav tsis muaj qhov me me, ntau txhim khu kev qha, pheej yig dua rau kev tsim khoom, tab sis lawv siv roj teeb kom nrawm dua, uas, los ntawm txoj kev, tsawg dua nyob rau hauv DSLRs vim muaj lub siab xav txo qhov loj me. Ntxiv mus, kev tsom mus rau lub koob yees duab iav tsis zoo xws li qhov phem thiab qeeb qeeb.
Cov iav, nyeg, tsis tshua muaj kev ntseeg siab, tsim kim dua rau kev tsim khoom, thiab ntawm chav kawm lawv loj dua. Txawm hais tias qhov no muaj nws qhov zoo: lawv haum tau zoo dua ntawm tes thiab ntau txoj kev tswj hwm tuaj yeem tso rau ntawm lub cev.
