Kev yuav lub koob yees duab DSLR tshiab dhau sijhawm yuav xav kom koj yuav cov lenses ntxiv rau nws. Koj yuav xav tau lawv yog tias koj lub duab ua ntau dua li ib tus nyiam ua haujlwm thiab koj yuav tsum tua txhua hom ntawv - duab, duab toj roob hauv pes, tseem muaj sia, nyob ntawm qhov sib txawv, nrog lub teeb pom kev sib txawv. Ntawd yog, thaum koj coj mus yees kev paub.
Cov Lus Qhia
Kauj ruam 1
Xaiv cov lo ntsiab muag raws li cov kev ntsuas tseem ceeb uas lawv sib txawv - focal ntev thiab aperture. Xaiv focal ntev nyob ntawm cov scenes koj npaj siab yuav tua. Lo ntsiab muag nrog focal ntev ntawm 13-28 hli feem ntau tua architecture, toj roob hauv pes, ntu nruab nrab, thiab hnub so hauv nroog. Qhov focal ntev ntawm 35-58 hli yog qhov ntau thiab ntau yam. Feem ntau cov lenses no tuaj nrog lub koob yees duab. Optics nrog qhov loj focal ntev ntawm 105-200 hli yog siv rau kev tua cov khoom nyob deb - kev sib tw kis las, tsiaj qus, pab pawg ntawm cov neeg nyob nrug deb. Lo ntsiab muag nrog qhov deb ntawm ntau dua 300 hli feem ntau yog siv rau kev tua hauv chaw ntau pob thiab thaum thaij duab.
Kauj ruam 2
Ua tib zoo saib cov khoom siv uas cov lo ntsiab muag tsim. Yog tias koj saib kev tshaj tawm lag luam pom qhov zoo ntawm txhua lub lens, koj yuav nkag siab tias ntau lub tuam txhab xav txog iav lo ntsiab muag yog qhov tsis zoo ntawm lub koob yees duab. Cov lus piav qhia yog yooj yim - lawv tsis raug rau cov khoom siv puas tsuaj (khawb) raws li, cov yas. Tsis tas li, cov plua plav ua raws li cov tsom iav yas dua nrawm dua, tshawb xyuas nrog koj lub khw muag khoom yog tias qhov lo ntsiab muag uas koj yuav tau muaj Cov Duab Ruaj Ruam. Ib qho tseem ceeb ntsuas uas tso cai rau koj kom tau txais cov duab ntshiab txawm tias muaj kev co. Qhov no yog qhov tshwj xeeb tshaj yog tias koj lub koob yees duab nws tus kheej tsis tau nruab nrog gimbal.
Kauj ruam 3
Xaiv lub lens rau aperture. Aperture - lub peev xwm ntawm lub lens xa qhov no lossis qhov ci ci ntawd (taws teeb) ntawm cov duab. Lub aperture nyob ntawm ob qhov tseem ceeb - qhov loj ntawm lub qhov hauv lub lens thiab focal ntev. Tus kws txiav txim plaub rau koj tus kheej, yog tias koj muab lub lauj kaub paj ntawm sab xis ntawm lub qhov rais qhib, thiab tom qab ntawd ces ib nrab npog lub qhov rais nrog daim ntaub thiab txav lub lauj kaub rau ntawm phab ntsa rov qab - ntawm dab tsi yuav muaj ntau lub teeb rau nws? Yog lawm, thaum lub lauj kaub ntawm qhov rais qhib. Yog li ntawd, qhov kev kawm deb dua, yuav tsum muaj qhov aperture ntau dua thiaj li yuav ntes nws. Piv txwv, rau kev yees duab, siv cov lenses ultra-nrawm - nrog tus nqi ntau dua 1.4.
