Yog tias koj tsiv los ntawm lub koob yees duab taw tes-thiab-tua rau DSLR, ib qho ntawm qhov tsis meej pem tshaj plaws tuaj yeem xav txog thaum koj yuav tsum siv phau ntawv tsom mus rau hom autofocus. Peb yuav muab qhov zoo thiab qhov tsis zoo rau koj.
- Muab kev tswj hwm ntau dua ntawm kev txhaj tshuaj kom pom tseeb.
- Tso cai rau qhov tseeb dua thaum tsom.
- Lub koob yees duab txiav txim siab qhov ntse tshaj plaws.
- nrawm dua li phau ntawv tsom.
- Zoo tuaj yeem txawv nyob ntawm lub koob yees duab qauv.
Autofocus thiab phau ntawv tsom xam ua tib yam. Ob leeg kho qhov ua kom pom tseeb ntawm lub koob yees duab lens. Tab sis, nrog autofocus, lub koob yees duab txiav txim siab qhov ntse tshaj plaws siv cov sensors mob siab rau ntsuas nws. Hauv hom autofocus, tus kws yees duab tsis tas yuav ua dab tsi. Hauv phau ntawv hom, tus kws yees duab yuav tsum kho lub lens tsom ntawm tes. Txawm hais tias ob qho tib si tuaj yeem tsim cov txiaj ntsig zoo nyob rau ntau qhov xwm txheej, muaj qee lub sijhawm uas nws zoo dua los xaiv ib qho ntawm lwm qhov.
Autofocus Pros and Cons
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Nws tsis siv neeg.
- Nws nrawm dua li phau ntawv tsom.
- Zoo rau kev tua cov ntsiab lus txav.
- Zoo rau cov pib tshiab.
- Yuav ua rau qee qhov kev lag luam kaw yog tias koj tsis ua ntej tsom.
- Tau tsom rau qhov tsis ncaj ncees ntawm koj qhov kev kawm.
- Tsis yog raws li phau ntawv tsom.
Autofocus feem ntau sai dua thiab yooj yim dua li teeb tsa qhov tsom xam ntawm tus kheej. Nws tuaj yeem xauv mus rau qhov kev kawm sai dua, thiab. Qhov no ua rau nws haum rau kev tua cov ntsiab lus txav. Yog tias koj tab tom ua kev yees duab hauv kev, piv txwv li, koj tsuas muaj sijhawm ob peb feeb los ntes koj cov ntsiab lus. Thaum lub sijhawm koj ua kom pom tseeb, lawv tuaj yeem txav mus, thiab koj yuav poob koj qhov kev txhaj tshuaj zoo meej.
Tsis yog hais tias phau ntawv tsom yog qhov tsis zoo rau kev thaij duab. Yog tias koj xav siv phau ntawv tsom mus rau cov ntsiab lus txav, ua ntej tsom mus rau qhov chaw koj paub tias cov ntsiab lus yuav txav mus los thiab tua qhov chaw ntawd.
Nyob ntawm tus qauv DSLR, ob peb hom autofocus sib txawv yuav tsum muaj:
- AF-S (ib leeg-servo) yog qhov zoo rau qhov chaw nyob ruaj khov, vim tias qhov tsom xam xauv thaum lub kaw lus raug nias ib nrab.
- AF-C (nruam-servo) yog qhov zoo rau kev txav mus los, vim tias qhov autofocus pheej hloov kho kom taug qab nws.
- AF-A (auto-servo) tso cai rau lub koob yees duab xaiv qhov twg ntawm ob hom autofocus yog qhov tsim nyog siv.
Autofocus nyiam muaj teeb meem ua haujlwm zoo thaum lub ntsiab lus thiab keeb kwm yav dhau yog xim zoo sib xws thaum qhov kev kawm yog ib nrab ntawm lub hnub ci ci thiab ib nrab hauv qhov ntxoov ntxoo, thiab thaum ib qho khoom nyob nruab nrab ntawm qhov kev kawm thiab lub koob yees duab. Hauv cov xwm txheej ntawd, hloov mus rau kev tsom xam phau ntawv.
Thaum siv autofocus, lub koob yees duab tsom feem ntau ntawm cov ntsiab lus hauv nruab nrab ntawm tus ncej. Txawm li cas los xij, feem ntau cov koob yees duab DSLR tso cai rau koj txav mus rau qhov chaw ua kom pom tseeb. Xaiv qhov autofocus cheeb tsam hais kom ua thiab hloov qhov taw tes ua kom pom tseeb siv tus xub yuam sij.
Yog tias lub koob yees duab lens muaj qhov hloov pauv uas txav ntawm phau ntawv tsom thiab autofocus, nws yuav tsum tau sau nrog M (phau ntawv) thiab A (auto). Txawm li cas los xij, qee qhov lo ntsiab muag suav nrog M / A hom, uas yog autofocus nrog kev xaiv phau ntawv tsom mus rau kev xaiv.
Txawm hais tias shutter lag yog feem ntau tsawg nrog lub koob yees duab DSLR, qhov zoo ntawm autofocus mechanism tuaj yeem txiav txim siab seb lub kaw lus lag koj lub koob yees duab pom ntau npaum li cas.
Thaum siv autofocus, koj tuaj yeem cuam tshuam lub lag luam los ntawm kev tsom mus rau qhov xwm txheej ua ntej. Nias lub khawm kaw ib nrab thiab tuav nws nyob rau hauv txoj hauj lwm ntawd kom txog thaum lub koob yees duab autofocus xauv rau ntawm qhov kev kawm. Tom qab ntawd nias lub khawm kaw qhov seem ntawm txoj kev los sau cov duab. Lub shutter lag yuav tsum raug tshem tawm.
Manual Focus Pros and Cons
- tso cai kom pom tseeb ntau dua.
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Zoo rau macro thiab portrait txhaj.
- Zoo rau kev yees duab qis.
- Slower dua autofocus.
- Ua kev txhaj tshuaj nyuaj.
Ntau tus kws yees duab tshaj lij nyiam tua hauv hom phau ntawv. Qhov ntawd yog vim nws muab kev tswj hwm ntau dua ntawm kev txhaj tshuaj kom pom tseeb. Kev taw qhia kev tsom xam yog qhov kev xaiv zoo tshaj plaws nyob rau hauv feem ntau qhov xwm txheej uas qhov kev kawm tsis txav ntau. Qhov no yog tshwj xeeb tshaj yog muaj tseeb rau macro, portrait, thiab low-light photography. Thaum siv hom pib, qee zaum koj lub koob yees duab tuaj yeem xaiv los tsom rau qhov tsis ncaj ncees lawm ntawm qhov kev kawm, ua rau koj qhov kev txhaj tshuaj puas tsuaj.
Nrog phau ntawv qhia, siv xibtes ntawm koj sab laug los khob lub lens. Tom qab ntawd siv koj cov ntiv tes laug kom me ntsis twist lub nplhaib kom pom tseeb kom txog thaum cov duab nyob rau hauv ntse ntse. Tuav lub koob yees duab kom zoo yog qhov tseem ceeb thaum siv phau ntawv tsom. Txwv tsis pub, nws yuav ua tau txawv txawv los txhawb lub koob yees duab thaum siv phau ntawv qhia lub nplhaib. Qhov no yuav ua rau nws nyuaj rau kev yees duab yam tsis muaj qhov muag plooj me ntsis ntawm lub koob yees duab co.
Koj tuaj yeem muaj hmoo zoo txiav txim siab seb qhov xwm txheej puas yog qhov ua kom pom tseeb los ntawm kev siv lub qhov muag pom tsis yog lub vijtsam LCD. Thaum tua sab nraum zoov hauv lub hnub ci ci, tuav lub qhov muag tiv thaiv koj lub qhov muag kom tsis txhob ci ntawm lub vijtsam LCD. Glare ua rau nws nyuaj los txiav txim siab qhov ua kom pom tseeb.
Yuav ua li cas thiaj paub qhov tsom kuv siv?
Txhawm rau pom hom kev tsom xam koj tam sim no nyob rau hauv, nias lub pob Cov ntaub ntawv ntawm koj lub koob yees duab DSLR. Hom kev tsom xam yuav tsum tau tso tawm, nrog rau lwm lub koob yees duab teeb tsa ntawm LCD. Kev teeb tsa hom kev tsom xam yuav tshwm sim siv lub cim lossis lub npe AF lossis MF. Nco ntsoov tias koj nkag siab cov cim thiab cov npe no. Tej zaum koj yuav tsum tau saib los ntawm DSLR cov lus qhia siv los nrhiav cov lus teb.
Qee lub sijhawm, koj tuaj yeem teeb tsa hom tsom rau ntawm lub lens hloov pauv tau los ntawm zawv zawg qhov hloov, txav ntawm autofocus thiab phau ntawv tsom.
Kuv Yuav Xaiv Qhov twg?
Yog tias koj yog tus kws yees duab tshiab, siv hom autofocus thaum koj kawm qhov ins-and-outs ntawm koj lub koob yees duab thiab ua haujlwm los txhim kho koj cov kev sib xyaw thiab teeb pom kev zoo. Tab sis, ntawm qee kis, koj yuav tsum kawm tua hauv phau ntawv thiab. Paub qhov zoo thiab qhov tsis zoo ntawm txhua tus yuav pab koj dhau los ua tus kws yees duab zoo dua thiab muab kev xaiv ntau rau koj thaum xyaum koj cov khoom siv tes ua.
