Cov lus piav qhia ntawm cov koob yees duab hauv cov khw muag khoom hluav taws xob tsis tsuas yog ntawm cov qauv npe, tab sis kuj tseem muaj qee tus yam ntxwv. Ib qho tseem ceeb ntawm kev ua haujlwm yog qhov pom lossis tsis muaj lub lens ntawm cov khoom siv. Txhawm rau qhia qhov no, Pob Khoom Sau Npe lossis Lub Cev tau qhia nyob hauv lub thawv thiab tus nqi sib tw.
Cov khoom siv lens, lossis lens lens, yog lub lens qauv uas muag nrog lub koob yees duab nws tus kheej. Cov khoom lag luam zoo sib xws nrog cov ntawv sau Lub cev tsis muaj lub lens hauv cov khoom siv, uas txhais tau tias koj yuav tsum tau yuav nws nyias. Feem ntau whale lens txuas nrog cov semi-professional interchangeable-lens koob yees duab.
Cov khoom siv ntawm cov lo ntsiab muag
Raws li tus txheej txheem, cov khoom siv lo ntsiab muag 18-55 hli yog muab nrog Canon, Sony, Nikon koob yees duab, cov cim suav qhia tias ntev focal.
Focal ntev yog qhov kev ncua deb (hauv millimetres lossis centimeters) los ntawm qhov chaw nruab nrab ntawm lub lens pem hauv ntej mus rau qhov chaw uas yog cov duab ntawm cov khoom nyob tsis sib luag. Hauv qhov no, qhov tsis pom tseeb hauv lub lens yuav tsum tau teem rau infinity.
Xws li lub lens yog "cov khoom siv luv luv", tab sis rau thawj cov duab ntawm DSLR tshiab nws yog qhov tsim nyog. Hauv cov khw muag khoom, koj tseem tuaj yeem pom cov cuab yeej siv mus ntev ntev rau cov duab cov khoom uas nyob deb, xws li noog hauv ya los yog cov ntses hauv lub pas dej.
Kuj tseem muaj ob chav khoom siv koob yees duab, uas, ntxiv rau lub koob yees duab nws tus kheej, suav nrog ob lo ntsiab muag - nrog lub ntsej muag luv thiab ntev cov khoom siv ntev. Cov khoom siv zoo li no feem ntau tau yuav los ntawm cov kws yees duab siab nyiam. Cov lo ntsiab muag tau rub tawm, uas yog, koj tuaj yeem hloov lub focal ntev rau lawv, uas txhais tau tias koj tuaj yeem thau lossis tawm sab hauv, uas yog ib qho zoo ntawm cov qauv no.
Cov kev ntsuas tshwj xeeb ntawm cov suav nrog kev coj yog qhov coj tus. Nws yog qhov tsis tsim nyog rau cov tuam ntxhab muab cov ntawv luam zoo ua khoom plig rau lub koob yees duab, yog li ntawd, tau xam cov chaw teeb tsa, hauv ob peb lub hlis ntau tus pib xyaum ua cov tub yees duab yuav lub lens tshiab.
Tab sis kev yuav lub Cev Yees Duab lub cev tam sim ntawd, uas yog, tsis yog pib kho qhov muag, kuj tsis yooj yim. Txhawm rau ua qhov no, koj yuav tsum to taub tam sim ntawm cov phiaj xwm tua neeg zoo, nyeem ob peb tsab xov xwm lossis sab laj nrog cov kws tshaj lij, yog li ntawd lub iav ntses loj yog qhov pib zoo.
Yog tias koj nyuam qhuav mus yuav lub koob yees duab, ib qho tseem ceeb ntxiv rau cov khoom siv lens yog lub lim uas yuav pab ua kom lub lens ntawm lwm yam sab nraud.
Tsis muaj lub whale lens
Ib qho ntawm lub ntsiab tsis zoo ntawm cov khoom siv yog nws lub qes qes, uas yog, koj yuav nyuaj rau koj hauv duab tsaus. Thaum kaw lub nrawm nrawm nrawm, cov duab yuav tsaus heev, thiab yog tias koj xav kom qeeb lub tshuab kaw qeeb, koj yuav xav tau ib qho chaw kos, txwv tsis pub daim duab yuav ua rau ntsaj vim kev sib hloov me ntsis.
