Thaum ib qho nqi pheej yig "xab npum ntxuav tais diav" tuaj yeem txaus rau cov neeg nyiam yees duab los tsim cov duab, cov kws tshaj lij kws ua haujlwm tsis tuaj yeem ua yam tsis muaj cuab yeej zoo. Cov koob yees duab siab zoo feem ntau muaj qhov sib txuam sib txuam, uas koj yuav tsum tau xaiv.
Cov Lus Qhia
Kauj ruam 1
Qhov zoo tshaj ntawm cov txiaj ntsig cov duab loj nyob ntawm seb muaj nuj nqi ntawm cov optics siv. Txhawm rau xaiv qhov tsim nyog, koj yuav tsum muaj kev nkag siab ntawm cov yam ntxwv tseem ceeb ntawm lub lens.
Kauj ruam 2
Thaum muas lub koob yees duab nrog lub lens zoo, them sai sai rau qhov tshwm sim ntawm nws qhov hloov. Tsis txhob siv cov koob yees duab nrog lub teeb tsa. Cov koob yees duab niaj hnub siv bayonet mount uas tso cai rau koj los hloov lawv lub sijhawm ntawm ob peb feeb.
Kauj ruam 3
Pib koj lub lens xaiv los ntawm tshawb online rau cov ntaub ntawv ntawm uas sib pauv hloov lo ntsiab muag raug pom zoo los ntawm cov kws tsim khoom rau koj lub koob yees duab. Nrog cov lo ntsiab muag pom zoo, koj tuaj yeem lav cov duab zoo. Hloov pauv, txawm tias lub koob thib peb ntawm lub ntsej muag ntawm cov tsim nyog hom yuav muab cov txiaj ntsig tsis txaus ntseeg vim tias nws tsis tau sim rau kev sib raug zoo nrog lub koob yees duab no.
Kauj ruam 4
Thaum muas optics, nco ntsoov nqa lub koob yees duab nrog koj thiaj li kuaj xyuas qhov zoo ntawm cov duab tshwm sim ntawm qhov chaw. Cov khw muag khoom yees duab zoo muaj peev xwm tso tawm cov ntawv xeem ntawm lub vijtsam loj, uas tso cai rau koj kom ntsuas tau qhov zoo ntawm koj qhov kev yuav khoom ntau dua. Nco ntsoov tias kev yuav khoom los ntawm cov tuam txhab tsim khoom, qee zaum tus nqi zoo, uas tuaj yeem coj koj ntau yam teeb meem.
Kauj ruam 5
Zam siv cov lo ntsiab muag uas yuav tsum tau yoog kom ua ke. Tsis yog txhua tus hloov kho tau muab cov haujlwm ntawm txhua lub lens xaiv, piv txwv li, autofocus. Tsis tas li ntawd, lub adapter hloov pauv lub focal ntev ntawm lub lens, uas cuam tshuam tsis zoo rau nws cov tsis. Qhov tshwj xeeb yog nyob rau qhov chaw tsom.
Kauj Ruam 6
Yog tias lub lens ua los ntawm lwm lub tuam txhab haum koj lub koob yees duab yam tsis muaj lub kho hloov, qhov no tsis txhais tau tias nws yuav ua haujlwm. Lub lens niaj hnub no yog cov khoom siv ntse ntse hauv tshuab hluav taws xob uas sib txuas lus nrog lub koob yees duab siv cov kev cai tshwj xeeb. Yog tias cov kev cai no txawv, lub lens yuav tsis ua haujlwm lossis yuav ua haujlwm tsis zoo los ntawm lub sijhawm.
Kauj Ruam 7
Thov nco ntsoov tias lub lens zoom, nrog txhua qhov zoo, yog qhov pom tsis meej ntawm lub laj kab focal ntev lub ntsej muag hais txog cov duab zoo. Lub xub ntiag ntawm sib pauv hloov kho qhov muag tsuas yog presupposes nws xaiv rau qee yam kev tua. Yog tias koj xav yuav lub lens zoo rau qee yam kev tua, piv txwv li, duab ntawm sab nrauv, tom qab ntawd tau txais lub teeb duab sab hauv tsis muaj duab. Qhov tsis muaj zoom ua rau lub lens yooj yooj yim dua thiab txhim khu kev qha, qhov zoo ntawm kev kho qhov muag teeb tau yooj yim dua. Ntxiv rau, nws tus nqi poob qis.
Kauj ruam 8
Qhov tseem ceeb ntsuas ntawm lub lo ntsiab muag yog nws qhov aperture piv, lossis tus kwv tij qhov ntsuas qhov ntsuas, nws yog qhia los ntawm qhov sib piv, piv txwv, 1: 3, 5. Qhov loj dua nws yog, zoo dua. Piv txwv, lub lens nrog 1: 2, 8 aperture ratio zoo dua li 1: 3, 5 lens, tab sis kuj tseem kim dua. Lub lens tsis muaj txheej txheem feem ntau yog sau rau ntawm sab xub ntiag ntawm txoj kab ntsuas lub ntsej muag, piv txwv li, 2, 8/24. Qhov no txhais tau hais tias lub lens tau tsau, qhov txheeb ze aperture yog 2, 8, thiab focal ntev yog 24. Hauv kev coj ua, nws tsis tshua muaj peev xwm coj kom zoo dua ntawm lub lens nrog tus kwv tij qhov siab dua 1: 2, 8.