Ib lub koob yees duab SLR yog suav tias yog ib hom khoom siv yees duab zoo tshaj plaws. Nws yog tsim los rau kev tshaj lij lossis ib nrab kev yees duab, tso cai rau koj kom tau cov duab ua tau zoo tshaj plaws, thiab pab txhawb kev sib pauv ntawm lo ntsiab muag. Lub lens zoo yog ib nrab ntawm kev ua tiav ntawm koj qhov kev tua, yog li xaiv qhov ntse.
Cov Lus Qhia
Kauj ruam 1
Muaj ntau ntau hom ntawm lo ntsiab muag kom haum rau ntau yam ntawm cov duab xav tau. Ib qho tseem ceeb tshaj plaws uas cais lawv ntawm ib leeg yog focal ntev. Yog tias koj xav tua cov toj roob hauv pes thiab panoramas, saib rau qhov ntev ntawm lub ntsej muag uas muaj lub ntsej muag luv ntawm tsis ntev tshaj 30 hli.
Kauj ruam 2
Yog tias koj xav tau cov duab hauv qab thiab cov pab pawg, koj tsis tuaj yeem mus yam tsis muaj lub lens portrait. Qhov focal ntev ntawm cov duab teeb ntawm ib daim duab yog 40-50mm rau kev txhaj tshuaj rau ntuj tshaj plaws. Rau macro photography, yuav tsum tau muaj kev sib tham hauv xov tooj nrog qhov siab ntev ntawm 300mm mus txog 300 hli.
Kauj ruam 3
Lwm qhov tseem ceeb lub lens parameter yog aperture lossis aperture ntau. Qhov zoo ntawm cov duab thaij hauv tsawg lub teeb pom kev ncaj qha nyob ntawm qhov ntsuas no. Qhov siab dua ntawm qhov aperture, meej thiab ntau dua kev txhaj tshuaj yuav tau txais nyob rau hauv lub teeb qis.
Kauj ruam 4
Lub aperture ntau yog qhia los ntawm tus tsiaj ntawv f hauv lub lens tshwj xeeb. Qhov qis tus nqi, qhov ntau dua ntawm qhov aperture. Yog tias koj xav tau cov kev txhaj tshuaj zoo hauv cov duab hluav taws xob tsis zoo lossis tsis tshua pom kev zoo, xaiv lub teeb f / 1.8 tsis dua li cov lens niaj hnub uas pib ntawm f / 3.5.
Kauj ruam 5
Daim duab stabilizer yog qhov zoo ntawm lub lens zoo. Lub stabilizer yuav pab kom tsis txhob plooj txhaj tshuaj thiab them nyiaj rau qhov tsis muaj ib qho chaw txawb chaw.
Kauj Ruam 6
Yuav ua li cas yog tias koj xav tua cov toj roob hauv pes, duab nruab nrab thiab cov txheeb ze? Rau cov neeg siv li no, lub lens manufacturers muab qauv ua qauv thoob ntiaj teb. Lawv kuj qee zaum hu ua whale lo ntsiab muag. Lawv tso cai rau ntau hom kev tua thiab muaj ntau yam tsis dhau. Qhov focal ntev ntawm xws li lub lens yog 18-35 hli qhov nruab nrab.
