Cov txheej txheem:
- Dab lim dej yog dab tsi? Photo
- ND lim siv nyob qhov twg?
- ND lim zoo rau dab tsi?
- Yuav siv cov lim ND li cas?
- hom lim
- ND lim: nws yog dab tsi?
- First function - qeeb shutter speed
- Qhov thib ob muaj nuj nqi yog txhob txwm ua kom plooj qhov txav ntawm tus ncej
- Peb txoj haujlwm yog txo qhov tob ntawm thaj teb
- Yuav lub lim ND: xav txog dab tsi?
- Khoom siv thiab txheej
- Plate filter lossis threaded filter: koj nyiam qhov twg?
- Txo Rings & Adapters
2024 Tus sau: Sierra Becker | [email protected]. Kawg hloov kho: 2024-02-26 05:10
Tej zaum, txhua tus kws yees duab tshiab xav txog cov lus nug, cov kws tshaj lij yuav ua li cas thiaj li ntes tau cov huab cua ntsais muag, dej tsaws tsag, pos huab, zoo li npog hauv hawb pob, dej ntws hauv lawv cov duab? Tib lub sijhawm, cov neeg pib tshiab tsis tuaj yeem ua tiav cov txiaj ntsig zoo sib xws uas siv lub kaw lus qeeb qeeb.
Qhov no yog vim cov kws yees duab tshaj lij siv ND lim. Tsis txhob cuam tshuam nrog cov ntxaij lim dej gradient - lawv tsuas yog darken ib feem ntawm tus ncej.
ND cov ntxaij lim dej yog tsim los nqus lub teeb uas dhau los ntawm lawv yam tsis muaj kev cuam tshuam cov xim luam tawm txhua txoj kev. Cov cuab yeej no yuav tso cai rau tus kws yees duab nce lub sijhawm pom.
Qhov ntom ntawm ND lim (qhov ntau ntawm lub teeb nws xa mus) tuaj yeem sib txawv.
Density | Tus nqi ntawm lub teeb lim cia dhau | Kev tawm |
ND - 2//0, 3 | 50 | 1 |
ND - 4//0, 6 | 25 | 2 |
ND - 8//0, 9 | 12, 5 | 3 |
ND - 16//1, 2 | 6, 25 | 4 |
ND - 32//1, 5 | 3, 125 | 5 |
ND - 64//1, 8 | 1,563 | 6 |
ND - 128//2, 1 | 0, 781 | 7 |
ND - 256//2, 4 | 0, 391 | 8 |
Kab lus no yuav qhia koj siv ND lim kom raug.
Dab lim dej yog dab tsi? Photo
Ib lub lim dej ND yog ib daim iav zoo nkauj uas txuas rau pem hauv ntej ntawm lub lens. Feem ntau, cov lim dej tsis muaj xim lossis ua los ntawm cov iav grey, uas thaiv cov teeb ci tseem ceeb, yog li tiv thaiv koj cov kev txhaj tshuaj los ntawm overexposure.
Cov lim nruab nrab muaj peev xwm hloov lossis txo qhov kev siv ntawm txhua xim ntawm lub teeb lossis nthwv dej sib npaug, uas yog, tsis cuam tshuam rau xim xim. Yog vim li cas thiaj tau nws lub npe.
ND lim siv nyob qhov twg?
Cov kws yees duab kws tshaj lij pom siv cov lim dej no, piv txwv li, hauv qhov kaj ci ci los ntawm tsom teeb. ND lim tau zoo heev los tiv thaiv lub teeb ntau dhau los ntawm kev nkag mus rau lub koob yees duab sensor, uas tso cai rau koj kom tau txais qhov sib npaug sib npaug yam tsis muaj kev cuam tshuam cov xim luam tawm. Nws muaj peev xwm ua kom tsaus rau tag nrho cov xwm txheej, coj nws rov qab mus rau qhov zoo li qub kom lub koob yees duab tuaj yeem ntes nws. Yog kojYog tias koj npaj yuav thaij duab lossis thaij duab rau hnub tshav ntuj, ND lim kuj tseem tuaj yeem ua ke.
Lub hom phiaj tseem ceeb ntawm tus kws yees duab tus pabcuam no yog tso cai kom yoog tau ntau dua nrog aperture, kev pom qhov muag plooj, thiab kaw nrawm, tsis hais txog huab cua. Cov nyhuv plooj uas lub lim ND tsim yog qhov nyuaj heev rau rov tsim dua txawm tias lub computer ua tiav cov duab tiav. Thiab qhov twg qhov no tuaj yeem ua tau, kev ua haujlwm dhau los ua txoj haujlwm ntev thiab ua haujlwm nyuaj.
ND lim zoo rau dab tsi?
- Kom txo qhov tob ntawm thaj teb hauv lub teeb ci heev.
- Yuav txhob txwm ua kom pom qhov muag plooj thaum tsiv ntau yam khoom.
- Txhim kho qhov nrawm nrawm yam tsis ua rau daim duab puas.
Yuav siv cov lim ND li cas?
Nyob rau hauv tej toj roob hauv pes kws yees duab lub hnab koj yuav pom ND lim. Txawm li cas los xij, lawv tsis tshua nyiam los ntawm amateurs. Tej zaum vim thaum xub thawj siab ib muag lub ND lim zoo li ib tug translucent darkish daim iav.
Tus kws yees duab tus pabcuam no yuav tsis ua rau pom qhov sib txawv ntawm cov duab uas tau tshwm sim, nws tsuas yog ua kom lub teeb pom kev zoo "kev nqus" ntawm daim duab tsawg dua.
Txawm li cas los xij, yog tias koj siv nws los ntes cov ntsiab lus hauv kev txav, xws li dej, huab, tsiaj, thiab txawm tias tib neeg, ND lim yuav qhib tag nrho lub ntiaj teb ntawm kev muaj tswv yim tsis muaj kev txwv. Los ntawm "txias" cov dej tsaws tsag nrog lub sijhawm kaw nrawm, koj tau txais cov duab tho txawv thiab zoo li qub, thaum sivqeeb shutter ceev thiab lim, koj tuaj yeem tau txais kev txhaj tshuaj dynamic vim qhov zoo nkauj qhov muag plooj ntawm qhov poob.
Qhov yooj yim muab los ntawm ND cov ntxaij lim dej tuaj yeem siv ntau txoj hauv kev: xaiv lub shutter ceev thiab aperture tus nqi ntawm qhov yuav, yam tsis tau saib rov qab ntawm cov xwm txheej sab nraud uas tswj hwm txoj cai ntawm kev tua.
Yog tias qhov kev sib tham yees duab tshwm sim thaum sawv ntxov hnub ci lossis yav tav su, tom qab ntawd siv lub lim ND, koj tuaj yeem ua kom qeeb ntawm kev txav mus los txhawm rau qhia nws txoj kev xav. Txawm li cas los xij, tus kws yees duab pabcuam no pab kom tau txais kev txhaj tshuaj zoo tshaj plaws thaum tsaus ntuj lossis thaum kaj ntug. Tus kws yees duab tuaj yeem yuav lub sijhawm raug me ntsis - lus ob peb vib nas this, thiab tib lub sijhawm qhia txog kev sib tsoo ntawm ntug dej hiav txwv nrog cov huab cua maj mam.
hom lim
Cov khw tshwj xeeb tau npaj los muab cov kws yees duab nrog ntau yam lim. Feem ntau siv yog cov phaj lim uas tau muab tso rau ntawm cov mounts (tus tuav lub thav duab thiab lub nplhaib adapter) thiab muaj cov xov puag ncig rau mounting ncaj qha rau pem hauv ntej ntawm lub hom phiaj lens.
ND lim: nws yog dab tsi?
Yog li, peb tuaj rau qhov nthuav tshaj plaws. ND lim pab tau li cas hauv cov txheej txheem kev yees duab? Nws muaj peb lub luag haujlwm tseem ceeb.
First function - qeeb shutter speed
Cov kws yees duab tshaj lij uas muaj kev paub dhau los lawv feem ntau nyiam tua toj roob hauv pes thiab xwm txheej ntawm qhov nrawm nrawm. Cov duab nrog "softening" ntawm nthwv dej thiab huab, qhov muag plooj dej zoo li surreal vim lawv qhov muag plooj.
Yog koj xav tauTxhawm rau kom ua tiav cov txiaj ntsig ntawm lwm lub ntiaj teb thiab paub tsis meej thaum thaij duab, nws txhais tau tias koj yuav tsum tau yuav lub lim ND. Kev siv qhov ntev ntev yuav tsum tau ua kom lub shutter ceev, uas nyob rau hauv lem tso cai rau koj kom zoo ntes lub zog ntawm huab, dej los yog pos huab nyob rau hauv tus ncej. Txawm li cas los, muaj ib tug caveat. Qee zaum, overexposure tej zaum yuav tshwm sim vim qhov tseeb tias vim qhov qis shutter ceev, ib qho dhau ntawm lub teeb nkag mus rau hauv matrix.
Lub ND lim koj siv rau pem hauv ntej ntawm lub lens yuav thaiv lub teeb ntau dhau, tso cai rau koj siv lub sijhawm kaw qeeb.
Qhov thib ob muaj nuj nqi yog txhob txwm ua kom plooj qhov txav ntawm tus ncej
Ib lub lim ND kuj tuaj yeem siv thaum thaij duab uas nws tseem ceeb rau kev ntes lub siab ntawm kev txav. Yog li, es tsis txhob ntes cov lus tsa suab kom khov rau lub sijhawm, tus kws yees duab tuaj yeem ua rau lub sijhawm kaw thiab siv lub lim los tsim qhov pom qhov muag plooj.
Peb txoj haujlwm yog txo qhov tob ntawm thaj teb
Ib qhov ntom ntom (ND) lim kuj tuaj yeem siv los txo qhov tob ntawm daim teb hauv daim duab. Es tsis txhob siv lub aperture me me uas txwv lub teeb kom ncav cuag lub sensor, koj tuaj yeem ntxiv lub lim uas tso cai rau koj kom tau txais kev xaiv qhov tob ntawm qhov chaw thaum txwv qhov teeb pom kev zoo. Txoj kev no koj tuaj yeem tau txais daim duab ntawm cov khoom xaiv tau zoo uas nyob hauv keeb kwm zoo nkauj.
Yuav lub lim ND: xav txog dab tsi?
Ntau tus kws yees duab xav paub qhov twg ND lim xaiv. Yam ntxwv dab tsi koj yuav tsum xyuam xim rau? Tam sim no qhia!
Khoom siv thiab txheej
Qhov zoo, thiab yog li tus nqi lim, cuam tshuam los ntawm ntau yam. Cov no yog cov khoom siv los ntawm cov khoom siv rau lub koob yees duab, thiab nws txheej. ND lim tuaj yeem ua los ntawm cov khoom siv, iav, lossis polyester. Qhov pheej yig tshaj ntawm cov ntaub ntawv no yog tom kawg. Txawm li cas los xij, nws tseem cuam tshuam lub teeb kis los ntawm nws tus kheej mus rau qhov ntau dua.
Muaj ntau ntau hom txheej txheej uas ua tiav kom txo tau cov dab phem thiab qhov kub hnyiab, thaum cov yas dub dub, ua ke nrog cov iav thaiv, pab txo qis vignetting.
Plate filter lossis threaded filter: koj nyiam qhov twg?
Cov lim dej me me, yooj yim rau nruab, tab sis tsis muaj qhov tseem ceeb - kev siv yooj yim. Nws tsis yog qhov tsis yooj yim rau kev sib xyaw ua ke ntawm ntau lub lim kom ua rau muaj teeb meem vignetting, thaum lub lim muab tsuas yog haum rau lub lens mount txoj kab uas hla.
Yuav siv cov ntxaij lim dej square, koj yuav xav tau lub thawv ntim khoom thiab lub nplhaib adapter. Cov khoom siv no yuav tsum nqa nrog koj ib txwm.
Nws tsis yooj yim rau kev xa cov kab ke los teeb tsa cov ntxaij lim dej square, tab sis nws yuav tso cai rau koj los ua ke cov lim dej sai thiab yooj yim. Raws li qhov tshwm sim, koj yuav ua rau lub sij hawm nthuav tawm ntau ntxiv.
Qhov tseem ceeb thiab qhov zoo ntawm lub phaj lim yog tias nws tuaj yeem hloov tau sai lossis ua ke nrog lwm tus los ntawm kev txhim kho ob peb daim hlau ua ke ib zaug. Ntxiv mus, xws li kev sib xyaw ua ke tuaj yeem suav nrog tsis yog ib qho tshwj xeeb, tab sis kuj muaj ntau hom lim. Koj tuaj yeem ua ke ND daim hlau nrog lwm hom lim, xws li polarizing lossis nruab nrab gradient.
Txo Rings & Adapters
Yuav tsum yuav pheej yig lub nplhaib adapters uas haum rau txhua lub lens koj siv kom yooj yim nruab ND daim hlau ntawm cov lo ntsiab muag sib txawv.
Yog tias koj xav siv cov ntxaij lim dej tshwj xeeb, ces nws yog qhov zoo dua los xaiv ib lub lim hauv lub khw rau lub lens nrog txoj kab uas hla loj tshaj plaws nrog rau kev txo qis uas yuav tso cai rau koj txuas lwm cov lim dej rau hauv lub cev.
Pom zoo:
Cov pob billiard yog dab tsi? Dab tsi yog qhov txawv ntawm ib lub teeb billiard niaj hnub thiab thawj zaug?
Cov pob billiard yog dab tsi? Dab tsi yog qhov txawv ntawm ib lub teeb billiard niaj hnub thiab thawj zaug? Ivory thiab lwm yam khoom siv rau pob billiard. Dab tsi yog billiard pob ua los ntawm tam sim no?
Shutter speed yog dab tsi? Nyob rau hauv dab tsi no muaj nuj nqi yog siv thiab nws puas xav tau nyob rau hauv lub koob yees duab?
Lub koob yees duab yog ib qho khoom siv nrog ntau lub zog thiab muaj peev xwm. Nyob ntawm qhov sib xyaw ua ke ntawm cov kev txwv no, qhov txiaj ntsig sib txawv tau ua tiav txawm tias thaum tua tib yam khoom. Yuav pib nrog, nws tsim nyog paub tias shutter ceev yog dab tsi, thaum nws xav tau thiab dab tsi tuaj yeem ua tiav nrog nws
Kev ua qauv khaub ncaws yog dab tsi. Cov txheej txheem ua qauv yog dab tsi
Tau kawm paub tias kev ua qauv zoo li cas, koj tuaj yeem txuag koj lub hnab nyiaj los ntawm kev yuav khoom tshiab, thaum ib txwm tseem niaj hnub zam thiab elegant
Pwm yog dab tsi thiab yog dab tsi?
Yuav ua kom cov khoom siv tes ua haujlwm yooj yim dua, cov kws ua haujlwm tsim khoom ntau dua thiab ntau dua. Cov no tuaj yeem yog cov koob tshwj xeeb rau cov paj ntaub lossis cov hlaws dai, cov tshuab rau cov ntaub qhwv los ntawm cov roj hmab, cov hlaws lossis cov xov, cutters ntawm ntau yam duab rau ntoo carving lossis molding
SLR koob yees duab - dab tsi yog cov txheej txheem no? Dab tsi yog cov txiaj ntsig ntawm SLR koob yees duab?
Kev kawm txuj ci tsis nyob twj ywm, txhua hnub cov duab thiab yees duab khoom siv tau yooj yim dua rau tib neeg. Tau kawg, qhov no tsis yog ib txwm muaj, vim tias ob lossis peb xyoos dhau los, tsuas yog cov kws tshaj lij, lossis cov neeg muaj qib siab heev, tuaj yeem siv cov cuab yeej yees duab thiab yees duab